report no. 1228 soils proficiency testing program round 28

SD 2.12.19

Report No. 1228

Soils Proficiency Testing Program

Round 28

January 2021

Acknowledgments

PTA wishes to gratefully acknowledge the technical assistance provided for this program by Mr Matthew McCarthy from Soil Engineering Services, Townsville, QLD. Also our thanks go to Ms Denise Weier from Soil Engineering Services, Townsville, QLD for the supply and distribution of the samples.

© Copyright Proficiency Testing Australia, 2020

PO Box 7507 SILVERWATER NSW 2128, Australia

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CONTENTS

1. FOREWORD ........................................................................................................ 1

2. FEATURES OF THE PROGRAM ......................................................................... 1

3. FORMAT OF THE APPENDICES ........................................................................ 2

4. STATISTICAL DESIGN OF THE PROGRAM ...................................................... 2

5. PTA AND TECHNICAL ADVISER’S COMMENTS ............................................... 5

6. OUTLIER RESULTS ............................................................................................ 9

7. REFERENCES ................................................................................................... 10

APPENDIX A – Results and Data Analysis

CBR 2.5 mm Uncorrected AS................................................................................... …A2

CBR 2.5 mm Corrected AS...................................................................................... …A5


CBR 5.0 mm Corrected AS....................................................................................... …A11

Achieved Dry Density Before Soaking AS……………………………………………… A14

Achieved Moisture Content Before Soaking AS……………………………………….. A17

Penetration Correction AS......................................................................................... A20

Compaction Apparatus AS……………………………………………………………….. A22

Swell Measurements AS........................................................................................... A24

Moisture Content Of The Top 30mm AS………………………………………………... A26

CBR 2.5 mm Uncorrected Q..................................................................................... A28

CBR 2.5 mm Corrected Q…...................................................................................... A29


CBR 5.0 mm Corrected Q......................................................................................... A31

Achieved Dry Density Before Soaking Q...……………………………………………… A32

Achieved Moisture Content Before Soaking Q..……………………………………….. A33

Penetration Correction Q........................................................................................... A34

Compaction Apparatus Q..……………………………………………………………….. A34

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Swell Measurements Q............................................................................................. A35

Moisture Content Of The Top 30mm Q..………………………………………………... A35 APPENDIX B – Homogeneity and Stability Testing

Homogeneity Testing................................................................................................ …B2

Stability Testing........................................................................................................ …B3

APPENDIX C – Documentation

Instructions to Participants........................................................................................ …C2

Results Sheet............................................................................................................ ….C4

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1. FOREWORD

This report summarises the results of a proficiency testing program on the determination of California Bearing Ratio (CBR) in Soil. It constitutes the twenty eighth round of an ongoing series of programs. This program is accredited to ISO/IEC 17043:2010 “Conformity assessment - General requirements for proficiency testing” by International Accreditation New Zealand (IANZ). The program was conducted in September 2020 - December 2020 by Proficiency Testing Australia (PTA). The aim of the program was to assess laboratories’ abilities to competently perform the prescribed analyses. The Program Coordinators were Dr Emilia Cincu and Mr Nicholas Fox and the Technical Adviser was Mr Matthew McCarthy from Soil Engineering Services, Townsville, QLD. This report was authorised by Mr Philip Briggs, PTA General Manager.

2. FEATURES OF THE PROGRAM (a) Participants were provided with one 15 - 16 kg soil sample containing road

base material. (b) A total of 58 laboratories received samples, comprising:

- 54 Australian participants; and

- 1 Overseas participants, including:

- Philippines (1). Of these 58 laboratories, 2 were unable to submit results by the due date. (c) Laboratories were provided with the Instructions to Participants and Results

Sheet (see Appendix C). Laboratories were requested to perform the tests according to their routine methods and to record their results on the Results Sheet.

(d) Prior to sample distribution, a number of randomly selected samples were

analysed for homogeneity. Based on the results of this testing (see Appendix B), the homogeneity of the samples was established.

(e) Each laboratory was randomly allocated a unique code number for the

program to ensure confidentiality of results. Reference to each laboratory in this report is by code number only. Please note that a number of laboratories reported more than one set of results and, therefore, their code numbers (with letter) could appear several times in the same data set.

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(f) Results (as reported by participants) with corresponding summary statistics (i.e. number of results, median, uncertainty of the median, normalised interquartile range, robust coefficient of variation, minimum, maximum and range) are presented in Appendix A (for each sample and for each of the analyses performed).

(g) A robust statistical approach, using z-scores, was utilised to assess

laboratories’ testing performance (see Section 4). Robust z-scores and z-score charts relevant to each test are presented in Appendix A.

(h) The document entitled Guide to Proficiency Testing Australia, 2019 (reference

[1]) defines the statistical terms and details the statistical procedures referred to in this report.

(i) A tabulated listing of laboratories (by code number) identified as having outlier

results can be found on page 9.

3. FORMAT OF THE APPENDICES

(a) Appendix A contains the analysis of results reported by laboratories for the

samples. This section contains the following for each determinant, where appropriate: - A table of results and calculated z-scores;

- A list of summary statistics; and

- Ordered z-score charts.

(b) Appendix B contains details of the homogeneity and stability testing. (c) Appendix C contains copies of the Instructions to Participants and Results

Sheet.

4. STATISTICAL DESIGN OF THE PROGRAM (a) Outlier Results and Z-scores In order to assess laboratories’ testing performance, a robust statistical

approach, using z-scores, was utilised. Z-scores give a measure of how far a result is from the consensus value (i.e. the median), and gives a "score" to each result relative to the other results in the group.

A z-score close to zero indicates that the result agrees well with those from

other laboratories, whereas a z-score with an absolute value greater than or

equal to 3.0 is considered to be an outlier and is marked by the symbol “§”.

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(b) Results Tables and Summary Statistics Each of these tables contains the results returned by each laboratory, the

method used, and the robust z-score calculated for each result. Results have been entered exactly as reported by participants. That is,

laboratories which did not report results to the precision (i.e. number of decimal places) requested on the Results Sheet have not been rounded to the requested precision before being included in the statistical analysis.

A list of summary statistics appears at the bottom of each of the tables of results and consists of:

- The number of results for that test/sample (No. of Results);

- The median of these results, i.e. the middle value (Median);

- The uncertainty of the median; a robust estimate of the standard deviation of the Median;

- The normalised interquartile range of the results (Normalised IQR);

- The robust coefficient of variation, expressed as a percentage (Robust CV) - i.e. 100 x Normalised IQR / Median;

- The minimum and maximum laboratory results; and

- The range (Maximum - Minimum).

The median is a measure of the centre of the data. The normalised IQR is a measure of the spread of the results. It is calculated by multiplying the interquartile range (IQR) by a correction factor which converts the IQR to an estimate of the standard deviation. The IQR is the difference between the upper and lower quartiles (i.e. the values above and below which a quarter of the results lie, respectively). For normally distributed data, the uncertainty of the median is approximated by:

n

normIQR

2

n = number of results

In this round, the CV values for CBR 2.5 mm and 5 mm uncorrected AS were considered inappropriate to calculate robust z-scores therefore a target coefficient of variation (CV) was used. The target standard deviation (SD) is calculated as the target CV multiplied by the median.

For these cases, the robust z-score (denoted by Z) for a laboratory’s sample A result was calculated as:

Z = A – median(A) target SD(A)

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where A is a sample in a testing program.

Please see reference [1] for further details on these robust summary statistics.

(c) Ordered Z-Score Charts On these charts each laboratory's robust z-score is shown, in order of

magnitude, and is marked with its code number. From these charts, each laboratory can readily compare its performance relative to the other laboratories.

These charts contain solid lines at +3.0 and -3.0, so that outliers are clearly

identifiable as those laboratories whose "bar" extends beyond these "cut-off" lines. The y-axis of these charts has been limited, so very large z-scores appear to extend beyond the chart boundary.

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The following table summarises the results submitted by participants for the program.

TABLE A: SUMMARY STATISTICS

Test No. of Results Median Normalised IQR

CBR 2.5 mm uncorrected AS

53 38.0 28.9

CBR 2.5 mm corrected AS

50 80.0 22.2

CBR 5.0 mm uncorrected AS

53 70.0 37.1

CBR 5.0 mm corrected AS

50 106.5 24.1

Achieved Dry Density AS

52 2.099 0.007

Achieved Moisture Content AS

52 9.70 0.15

CBR 2.5 mm uncorrected Q

10 32.5 20.0

CBR 2.5 mm corrected Q

9 45.0 12.2

CBR 5.0 mm uncorrected Q

10 70.5 29.2

CBR 5.0 mm corrected Q

9 76.0 21.9

Achieved Dry Density Q

10 2.098 0.009

Achieved Moisture Content Q

10 9.60 0.17

5. PTA AND TECHNICAL ADVISER’S COMMENTS Out of 58 participating laboratories (57 Australian participants and 1 overseas participant), 2 were unable to submit the results in time to be included in the final report. A total number of 10 sets of results were returned for the Q113C method. All laboratories with outliers or an absolute z-score between 2.0 and 3.0 are encouraged to review their procedures. Overall, a satisfactory level of testing was achieved by the majority of the participants. A total of 7 outliers have been identified out of 368 results, representing 1.9%. This percentage is lower than previous rounds, as presented in Table B. The spread of results is notably higher than previous rounds for AS 1289.6.1.1 but lower for Q113C, as presented in Table C. For the AS tests there were varying CVs with the CBR 2.5 mm uncorrected having a far higher CV compared to round 26. On the

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other hand the corrected values for CBR 2.5 mm were consistent with previous rounds. For CBR 2.5 mm uncorrected and CBR 5 mm uncorrected an average of the previous rounds were used to assign the target CV.

Laboratory code 40 recorded an initial and final value for the swell measurement. This is inconsistent with the standard as AS1289.6.1.1. mentions to take an initial reading before soaking and after the soaking is completed, place the measuring device on the marked points and take another reading. These two initial and final readings will give you the swell of the specimen as a percentage as required by both AS and Q test methods. Also note that Lab 40 used AS1289.5.1.1 and not AS1289.6.1.1 which is used for MDR testing. No explanation was provided for this decision. Laboratory code 48 reported a blunder result for Achieved Dry Density that was not considered for statistical analysis. Laboratory code 9 reported a blunder result for Achieved Moisture Control that was not considered for statistical analysis. Laboratory codes 3, 12, 13, 37 and 57 did not apply a correction to the penetration curve. All other laboratories applied a correction for the provided material. Due to surface irregularities of this type of material, correction is expected. Laboratory codes 4, 7, 19, 20, 29, 40, 48 and 56B submitted both corrected and uncorrected values, but no penetration correction values. It is recommended that in future rounds, the laboratories submit the value of the penetration correction applied. Laboratory code 49 submitted uncorrected values but no corrected ones even if a penetration correction was applied. It is recommended that in the future a corrected value is also provided. AS 1289.6.1.1 specifies that Achieved Dry Density should be within 1% of the SMDD. The analysis of the results has shown that with the exception of laboratory code 48, all other laboratories have obtained a satisfactory result for this parameter. Note that laboratory code 48 result is considered a blunder. The requirements for Achieved Moisture Content state that it should not differ from the specified moisture content (SOMC) by more than 0.5%. Laboratory codes 5 and 40 obtained Achieved Moisture Content results outside of this range, therefore their results were identified as outliers. Q113C specifies that Achieved Dry Density should not differ by more than 0.02 t/m

3

of the SMDD and Achieved Moisture Content should not differ by more than 1% of the SOMC. All laboratories have fulfilled these requirements.

Possible sources of error and suggestions for improvements Some processes to look out for may include but are not limited to: Compaction patterns and procedures Seating load at time of penetration Thickness of each layer Calibration of equipment

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Tester competence Software program for CBR Calculations, especially units of measurements, examination of application to

any correction applied to penetration graph Reporting and Training

Participants should take care when recording results and note the units and calculations when testing the samples.

TABLE B: COMPARISON OF PREVIOUS ROUND % OF OUTLIERS

Test Round

20

Round

22

Round

24

Round

26

Round

28

Percentage of outliers 5.6% N/A 5.0% 3.2% 1.9%

TABLE C: COMPARISON OF PREVIOUS ROUND ROBUST CVs

Test Round

20

Round

22

Round

24

Round

26

Round

28

CBR 2.5 mm uncorrected AS 55.6% 37.1% 46.8% 58.2% 76.1%

CBR 2.5 mm corrected AS 26.8% 31.8% 29.2% 20.8% 27.8%

CBR 5.0 mm uncorrected AS 31.9% 33.4% 31.3% 35.8% 53.0%

CBR 5.0 mm corrected AS 16.3% 29.0% 24.9% 15.4% 22.6%

Achieved Dry Density AS 0.3% 0.2% N/A 0.4% 0.4%

Achieved Moisture Content AS 2.8% 0.9% 1.9% 2.3% 1.5%

CBR 2.5 mm uncorrected Q N/A N/A 34.6% 76.1% 61.7%

CBR 2.5 mm corrected Q N/A N/A 38.7% 55.2% 27.2%

CBR 5.0 mm uncorrected Q N/A N/A 21.5% 46.5% 41.4%

CBR 5.0 mm corrected Q N/A N/A 34.0% 43.2% 28.8%

Achieved Dry Density Q N/A N/A N/A 0.2% 0.4%

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Test Round

20

Round

22

Round

24

Round

26

Round

28

Achieved Moisture Content Q N/A N/A 1.9% 3.3% 1.8%

N/A indicates not applicable Metrological Traceability and Measurement Uncertainty of Assigned Values Consensus values (median) derived from participants’ results are used in this program. These values are not metrologically traceable to an external reference. As the assigned value for this program is the median of the results submitted by the participants, the uncertainty of the median has been calculated and is presented in Appendix A1. Analysis of Results by Method Groups In order for methods to be grouped for analysis, PTA requires at least 11 sets of results from the same method group. For the following tests, at least 11 sets of results from the same method group were returned, therefore, an analysis based on AS 1289.6.1.1 was performed.

TABLE D: ANALYSIS OF RESULTS BY METHODS GROUPS

Test Method No. of

Results Median

Uncertainty

of the

Median

CBR 2.5 mm Uncorrected AS

AS 1289.6.1.1 51 40.0 4.6

CBR 2.5 mm Corrected AS

AS 1289.6.1.1 48 80.0 4.2

CBR 5 mm Uncorrected AS

AS 1289.6.1.1 51 72.0 6.2

CBR 5 mm Corrected AS

AS 1289.6.1.1 48 108.5 4.3

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6. OUTLIER RESULTS

Laboratories reporting outlier results are listed in the following table:

TABLE E: SUMMARY OF STATISTICAL AND NON-STATISTICAL OUTLIERS

Test Laboratory

Code No.

CBR 2.5 mm uncorrected AS 3, 14

CBR 2.5 mm corrected AS -

CBR 5.0 mm uncorrected AS 3

CBR 5.0 mm corrected AS -

Achieved Dry Density AS 48

Achieved Moisture Content AS 5, 40, 9

CBR 2.5 mm uncorrected Q -

CBR 2.5 mm corrected Q -

CBR 5.0 mm uncorrected Q -

CBR 5.0 mm corrected Q -

Achieved Dry Density Q -

Achieved Moisture Content Q -

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7. REFERENCES

[1] Guide to Proficiency Testing Australia, 2019 (This document can be found on the PTA website, www.pta.asn.au)

[2] AS1289.6.1.1:2014 Methods of testing soils for engineering purposes

Soil strength and consolidation tests - Determination of the California Bearing Ratio of a Soil - Standard laboratory method for a remoulded specimen

[3] Q113C:2020 California Bearing Ratio of soil at nominated levels of dry

density and moisture content

A1

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APPENDIX A

Results and Data Analysis


CBR 2.5 mm Corrected AS...................................................................................... …A5


CBR 5.0 mm Corrected AS....................................................................................... …A11

Achieved Dry Density Before Soaking AS……………………………………………… A14

Achieved Moisture Content Before Soaking AS……………………………………….. A17

Penetration Correction AS......................................................................................... A20

Compaction Apparatus AS……………………………………………………………….. A22

Swell Measurements AS........................................................................................... A24

Moisture Content Of The Top 30mm AS………………………………………………... A26


CBR 2.5 mm Corrected Q…...................................................................................... A29


CBR 5.0 mm Corrected Q......................................................................................... A31

Achieved Dry Density Before Soaking Q...……………………………………………… A32

Achieved Moisture Content Before Soaking Q..……………………………………….. A33

Penetration Correction Q........................................................................................... A34

Compaction Apparatus Q..……………………………………………………………….. A34

Swell Measurements Q............................................................................................. A35

Moisture Content Of The Top 30mm Q..………………………………………………... A35

A2

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CBR 2.5 mm Uncorrected AS (1%)

Laboratory Code Result Robust Z-

Score Method

1 38 0.00 AS1289.6.1.1

3 119 4.26 § AS 1289.6.1.1

4 30 -0.42 AS 1289.6.1.1

5 43 0.26 AS 1289.6.1.1

6 90 2.74 ? AS 1289.6.1.1

7 70 1.68 AS1289.6.1.1

9 16.4 -1.14 AS 1289.6.1.1

10 45 0.37 AS 1289.6.1.1

11 10 -1.47 AS 1289.6.1.1

12 70 1.68 AS 1289.6.1.1

13 70 1.68 AS 1289.6.1.1

14 101 3.32 § AS1289.6.1.1/AS1289.2.1.1

15 61 1.21 AS 1289.6.1.1

16 29 -0.47 AS 1289.6.1.1

18 2.0 -1.89 AS 1289.6.1.1

19 90.9 2.78 ? AS 1289.6.1.1

20 76 2.00 AS 1289.6.1.1

21A 26 -0.63 AS 1289.6.1.1

21B 44 0.32 AS 1289.6.1.1

22 55 0.89 AS1289.6.1.1

23 58 1.05 AS1289.6.1.1

25 19 -1.00 AS1289.6.1.1

27 12 -1.37 AS1289.6.1.1

28 40 0.11 AS 1289.6.1.1

29 34 -0.21 AS 1289.6.1.1

31 57 1.00 AS 1289.6.1.1

32 44 0.32 AS 1289.6.1.1

33A 21 -0.89 RMS T117

33B 16 -1.16 T117

34 12 -1.37 AS 1289.6.1.1

36 53 0.79 AS 1289.6.1.1

38 30 -0.42 AS 1289.6.1.1

40 40 0.11 AS 1289.5.1.1

42 87.0 2.58 ? AS 1289.6.1.1

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Laboratory Code Result Robust Z-Score Method

43A 16 -1.16 AS1289.6.1.1

46 30 -0.42 AS1289.6.1.1

47 18 -1.05 AS 1289.6.1.1

48 35 -0.16 AS 1289.6.1.1

49 80 2.21 ? AS 1289.6.1.1

50 42 0.21 AS 1289.6.1.1

53 19 -1.00 AS 1289.6.1.1

54 19 -1.00 AS 1289.6.1.1

56A 60 1.16 #

56B 60 1.16 AS 1289.6.1.1

56C 35 -0.16 AS 1289.6.1.1

56D 25 -0.68 AS 1289.6.1.1

57 60 1.16 AS 1289.6.1.1

59 15 -1.21 AS 1289.6.1.1

60 59 1.11 AS 1289.6.1.1

62 14 -1.26 AS 1289.6.1.1

63 34 -0.21 AS 1289.6.1.1

65 25 -0.68 AS 1289.6.1.1

66 32 -0.32 AS 1289.6.1.1

No. of Results 53

Median 38.0

Normalised IQR 28.9

Uncertainty of the Median

5.0

Robust CV 76.1%

Target CV 50.0%

Target SD 19.00

Minimum 2

Maximum 119

Range 117

Notes:

"?" indicates an absolute z-score greater than 2.0 but less than 3, i.e. 2.0 < |z-score| < 3.0

“§” indicates an outlier, i.e. |z-score| ≥ 3.0

"#" indicates no response was provided by the laboratory

A4

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A5

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CBR 2.5 mm Corrected AS (1%)


Score Method

1 76 -0.18 AS1289.6.1.1

3 119 1.75 AS 1289.6.1.1

4 100 0.90 AS 1289.6.1.1

5 80 0.00 AS 1289.6.1.1

6 100 0.90 AS 1289.6.1.1

7 120 1.80 AS1289.6.1.1

9 76.8 -0.14 AS 1289.6.1.1

10 90 0.45 AS 1289.6.1.1

11 42 -1.71 AS 1289.6.1.1

12 # N/A AS 1289.6.1.1

13 70 -0.45 AS 1289.6.1.1

14 121 1.84 AS1289.6.1.1/AS1289.2.1.1

15 91 0.49 AS 1289.6.1.1

16 76 -0.18 AS 1289.6.1.1

18 60 -0.90 AS 1289.6.1.1

19 90 0.45 AS 1289.6.1.1

20 100 0.90 AS 1289.6.1.1

21A 57 -1.03 AS 1289.6.1.1

21B 68 -0.54 AS 1289.6.1.1

22 98 0.81 AS1289.6.1.1

23 91 0.49 AS1289.6.1.1

25 60 -0.90 AS1289.6.1.1

27 60 -0.90 AS1289.6.1.1

28 90 0.45 AS 1289.6.1.1

29 68 -0.54 AS 1289.6.1.1

31 80 0.00 AS 1289.6.1.1

32 113 1.48 AS 1289.6.1.1

33A 69 -0.49 RMS T117

33B 50 -1.35 T117

34 47 -1.48 AS 1289.6.1.1

36 91 0.49 AS 1289.6.1.1

38 80 0.00 AS 1289.6.1.1

40 100 0.90 AS 1289.5.1.1

42 108.0 1.26 AS 1289.6.1.1

43A 66 -0.63 AS1289.6.1.1

46 100 0.90 AS1289.6.1.1

47 61 -0.85 AS 1289.6.1.1

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48 60 -0.90 AS 1289.6.1.1

49 # N/A AS 1289.6.1.1

50 73 -0.31 AS 1289.6.1.1

53 60 -0.90 AS 1289.6.1.1

54 67 -0.58 AS 1289.6.1.1

56A 90 0.45 #

56B 100 0.90 AS 1289.6.1.1

56C 50 -1.35 AS 1289.6.1.1

56D 80 0.00 AS 1289.6.1.1

57 # N/A AS 1289.6.1.1

59 90 0.45 AS 1289.6.1.1

60 99 0.85 AS 1289.6.1.1

62 60 -0.90 AS 1289.6.1.1

63 87 0.31 AS 1289.6.1.1

65 80 0.00 AS 1289.6.1.1

66 82 0.09 AS 1289.6.1.1

No. of Results 50

Median 80.0

Normalised IQR 22.2


3.9

Robust CV 27.8%

Minimum 42

Maximum 121

Range 79

Notes:


"N/A" indicates not applicable

A7

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A8

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1 72 0.09 AS1289.6.1.1

3 151 3.51 § AS 1289.6.1.1

4 70 0.00 AS 1289.6.1.1

5 73 0.13 AS 1289.6.1.1

6 110 1.73 AS 1289.6.1.1

7 120 2.16 ? AS1289.6.1.1

9 44.5 -1.10 AS 1289.6.1.1

10 70 0.00 AS 1289.6.1.1

11 28 -1.82 AS 1289.6.1.1

12 102 1.39 AS 1289.6.1.1

13 90 0.87 AS 1289.6.1.1

14 113 1.86 AS1289.6.1.1/AS1289.2.1.1

15 96 1.13 AS 1289.6.1.1

16 65 -0.22 AS 1289.6.1.1

18 8 -2.68 ? AS 1289.6.1.1

19 117.2 2.04 ? AS 1289.6.1.1

20 128 2.51 ? AS 1289.6.1.1

21A 54 -0.69 AS 1289.6.1.1

21B 70 0.00 AS 1289.6.1.1

22 98 1.21 AS1289.6.1.1

23 100 1.30 AS1289.6.1.1

25 45 -1.08 AS1289.6.1.1

27 38 -1.39 AS1289.6.1.1

28 80 0.43 AS 1289.6.1.1

29 64 -0.26 AS 1289.6.1.1

31 94 1.04 AS 1289.6.1.1

32 98 1.21 AS 1289.6.1.1

33A 49 -0.91 RMS T117

33B 35 -1.52 T117

34 33 -1.60 AS 1289.6.1.1

36 90 0.87 AS 1289.6.1.1

38 70 0.00 AS 1289.6.1.1

40 80 0.43 AS 1289.5.1.1

42 123.0 2.29 ? AS 1289.6.1.1

43A 44 -1.13 AS1289.6.1.1

46 70 0.00 AS1289.6.1.1

47 48 -0.95 AS 1289.6.1.1

48 60 -0.43 AS 1289.6.1.1

49 110 1.73 AS 1289.6.1.1

A9

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Score Method

50 82 0.52 AS 1289.6.1.1

53 45 -1.08 AS 1289.6.1.1

54 45 -1.08 AS 1289.6.1.1

56A 100 1.30 #

56B 100 1.30 AS 1289.6.1.1

56C 70 0.00 AS 1289.6.1.1

56D 60 -0.43 AS 1289.6.1.1

57 90 0.87 AS 1289.6.1.1

59 46 -1.04 AS 1289.6.1.1

60 102 1.39 AS 1289.6.1.1

62 30 -1.73 AS 1289.6.1.1

63 72 0.09 AS 1289.6.1.1

65 45 -1.08 AS 1289.6.1.1

66 61 -0.39 AS 1289.6.1.1

No. of Results 53

Median 70.0

Normalised IQR 37.1


6.4

Robust CV 53.0%

Target CV 33.0%

Target SD 23.10

Minimum 8

Maximum 151

Range 143

Notes:

"?" indicates an absolute z-score greater than 2.0 but less than 3, i.e. 2.0 < Ιz-scoreΙ < 3.0

“§” indicates an outlier, i.e. Ιz-scoreΙ ≥ 3.0



A10

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A11

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Score Method

1 100 -0.27 AS1289.6.1.1

3 151 1.85 AS 1289.6.1.1

4 130 0.98 AS 1289.6.1.1

5 108 0.06 AS 1289.6.1.1

6 120 0.56 AS 1289.6.1.1

7 160 2.22 ? AS1289.6.1.1

9 99.3 -0.30 AS 1289.6.1.1

10 90 -0.68 AS 1289.6.1.1

11 56 -2.10 ? AS 1289.6.1.1

12 # N/A AS 1289.6.1.1

13 90 -0.68 AS 1289.6.1.1

14 126 0.81 AS1289.6.1.1/AS1289.2.1.1

15 121 0.60 AS 1289.6.1.1

16 102 -0.19 AS 1289.6.1.1

18 70 -1.52 AS 1289.6.1.1

19 120 0.56 AS 1289.6.1.1

20 130 0.98 AS 1289.6.1.1

21A 88 -0.77 AS 1289.6.1.1

21B 91 -0.64 AS 1289.6.1.1

22 131 1.02 AS1289.6.1.1

23 120 0.56 AS1289.6.1.1

25 70 -1.52 AS1289.6.1.1

27 86 -0.85 AS1289.6.1.1

28 120 0.56 AS 1289.6.1.1

29 90 -0.68 AS 1289.6.1.1

31 110 0.15 AS 1289.6.1.1

32 145 1.60 AS 1289.6.1.1

33A 89 -0.73 RMS T117

33B 70 -1.52 T117

34 67 -1.64 AS 1289.6.1.1

36 123 0.68 AS 1289.6.1.1

38 110 0.15 AS 1289.6.1.1

40 130 0.98 AS 1289.5.1.1

42 136.0 1.22 AS 1289.6.1.1

43A 86 -0.85 AS1289.6.1.1

46 130 0.98 AS1289.6.1.1

47 83 -0.98 AS 1289.6.1.1

48 80 -1.10 AS 1289.6.1.1

49 # N/A AS 1289.6.1.1

A12

SD 2.12.19



Score Method

50 105 -0.06 AS 1289.6.1.1

53 90 -0.68 AS 1289.6.1.1

54 88 -0.77 AS 1289.6.1.1

56A 120 0.56 #

56B 120 0.56 AS 1289.6.1.1

56C 80 -1.10 AS 1289.6.1.1

56D 100 -0.27 AS 1289.6.1.1

57 # N/A AS 1289.6.1.1

59 114 0.31 AS 1289.6.1.1

60 129 0.93 AS 1289.6.1.1

62 80 -1.10 AS 1289.6.1.1

63 113 0.27 AS 1289.6.1.1

65 90 -0.68 AS 1289.6.1.1

66 109 0.10 AS 1289.6.1.1

No. of Results 50

Median 106.5

Normalised IQR 24.1


4.3

Robust CV 22.6%

Minimum 56

Maximum 160

Range 104

Notes:

"?" indicates an absolute z-score greater than 2.0 but less than 3, i.e. 2.0 < Ιz-scoreΙ < 3.0 "#" indicates no response was provided by the laboratory "N/A" indicates not applicable

A13

SD 2.12.19

A14

SD 2.12.19

Achieved Dry Density Before Soaking AS (0.01 t/m3)


Score Method

1 2.095 -0.54 AS1289.6.1.1

3 2.09 -1.21 AS 1289.6.1.1

4 2.10 0.13 AS 1289.6.1.1

5 2.11 1.48 AS 1289.6.1.1

6 2.10 0.13 AS 1289.6.1.1

7 2.099 0.00 AS1289.6.1.1

9 2.091 -1.08 AS 1289.6.1.1

10 2.10 0.13 AS 1289.6.1.1

11 2.09 -1.21 AS 1289.6.1.1

12 2.077 -2.97 ● AS 1289.6.1.1

13 2.093 -0.81 AS 1289.6.1.1

14 2.10 0.13 AS1289.6.1.1/AS1289.2.1.1

15 2.09 -1.21 AS 1289.6.1.1

16 2.10 0.13 AS 1289.6.1.1

18 2.10 0.13 AS 1289.6.1.1

19 2.09 -1.21 AS 1289.6.1.1

20 2.09 -1.21 AS 1289.6.1.1

21A 2.10 0.13 AS 1289.6.1.1

21B 2.09 -1.21 AS 1289.6.1.1

22 2.10 0.13 AS1289.6.1.1

23 2.10 0.13 AS1289.6.1.1

25 2.073 -3.51 ● AS1289.6.1.1

27 2.09 -1.21 AS1289.6.1.1

28 2.094 -0.67 AS 1289.6.1.1

29 2.10 0.13 AS 1289.6.1.1

31 2.105 0.81 AS 1289.6.1.1

32 2.087 -1.62 AS 1289.6.1.1

33A 2.10 0.13 RMS T117

33B 2.099 0.00 T117

34 2.10 0.13 AS 1289.6.1.1

36 2.09 -1.21 AS 1289.6.1.1

38 2.09 -1.21 AS 1289.6.1.1

40 2.07 -3.91 ● AS 1289.5.1.1

42 2.10 0.13 AS 1289.6.1.1

43A 2.10 0.13 AS1289.6.1.1

46 2.10 0.13 AS1289.6.1.1

47 2.093 -0.81 AS 1289.6.1.1

A15

SD 2.12.19

Achieved Dry Density Before Soaking AS (0.01 t/m3)


48 99.6 N/A § AS 1289.6.1.1

49 2.088 -1.48 AS 1289.6.1.1

50 2.09 -1.21 AS 1289.6.1.1

53 2.09 -1.21 AS 1289.6.1.1

54 2.10 0.13 AS 1289.6.1.1

56A 2.10 0.13 #

56B 2.11 1.48 AS 1289.6.1.1

56C 2.10 0.13 AS 1289.6.1.1

56D 2.09 -1.21 AS 1289.6.1.1

57 2.095 -0.54 AS 1289.6.1.1

59 2.10 0.13 AS 1289.6.1.1

60 2.09 -1.21 AS 1289.6.1.1

62 2.10 0.13 AS 1289.6.1.1

63 2.10 0.13 AS 1289.6.1.1

65 2.09 -1.21 AS 1289.6.1.1

66 2.10 0.13 AS 1289.6.1.1

No. of Results 52

Median 2.099

Normalised IQR 0.007


0.001

Robust CV 0.4%

Minimum 2.07

Maximum 2.11

Range 0.04

Notes:

"●" indicates that the result is acceptable (not an outlier) based on the requirements of the standard

“§” indicates a non-statistical outlier (blunder)



A16

SD 2.12.19

A17

SD 2.12.19

Achieved Moisture Content Before Soaking AS (0.1%)


Score Method

1 9.7 0.00 #

3 9.8 0.67 AS 1289 2.1.1/AS 1289.6.1.1

4 9.6 -0.67 AS 1289.2.1.1

5 9.1 -4.05 § AS 1289.2.1.2/ AS 1289.2.1.1

6 9.4 -2.02 ● AS 1289.6.1.1

7 9.5 -1.35 AS1289.6.1.1/AS1289.2.1.1

9 2.094 N/A § AS 1289.6.1.1

10 9.4 -2.02 ● AS 1289.6.1.1

11 9.7 0.00 AS 1289.2.1.1

12 9.5 -1.35 #

13 9.6 -0.67 #

14 9.5 -1.35 AS1289.6.1.1/AS1289.2.1.1

15 9.7 0.00 #

16 9.5 -1.35 #

18 9.6 -0.67 #

19 9.5 -1.35 AS 1289.2.1.1

20 9.5 -1.35 AS 1289 2.1.1

21A 9.4 -2.02 ● #

21B 9.8 0.67 #

22 9.7 0.00 AS1289.6.1.1

23 9.5 -1.35 AS1289.6.1.1

25 9.8 0.67 AS1289.2.1.1

27 9.7 0.00 AS1289.2.1.1

28 9.8 0.67 AS 1289.6.1.1

29 9.7 0.00 AS 1289.2.1.1/AS 1289.6.1.1

31 9.5 -1.35 AS 1289.2.1.1

32 10.0 2.02 ● #

33A 9.7 0.00 RMS T120

33B 9.6 -0.67 T120

34 9.7 0.00 AS 1289.2.1.1

36 9.6 -0.67 AS 1289.2.1.1

38 9.8 0.67 AS 1289.2.1.1

40 10.3 4.05 § AS 1289.2.1.1

42 9.5 -1.35 AS 1289.2.1.1

43A 9.7 0.00 #

46 9.7 0.00 AS 1289.2.1.1

47 9.9 1.35 AS 1289.2.1.1

48 9.6 -0.67 AS 1289.2.1.1

A18

SD 2.12.19

Achieved Moisture Content Before Soaking AS (0.1%)


Score Method

49 9.6 -0.67 AS 1289.2.1.1

50 9.7 0.00 AS 1289.2.1.1

53 9.7 0.00 AS 1289.2.1.1

54 9.7 0.00 AS 1289.6.1.1

56A 9.8 0.67 #

56B 9.3 -2.70 ● #

56C 9.5 -1.35 #

56D 9.7 0.00 #

57 9.8 0.67 #

59 9.7 0.00 AS 1289.2.1.1

60 9.7 0.00 #

62 9.4 -2.02 ● #

63 9.4 -2.02 ● AS 1289.2.1.1

65 9.8 0.67 AS 1289.2.1.1

66 9.5 -1.35 #

No. of Results 52

Median 9.70

Normalised IQR 0.15


0.03

Robust CV 1.5%

Minimum 9.1

Maximum 10.3

Range 1.2

Notes:

“§” indicates an outlier, i.e. Ιz-scoreΙ ≥ 3.0

“§” for laboratory code 9 indicates a non-statistical outlier (blunder)

"●" indicates that the result is acceptable (not an outlier) based on the requirements of the standard


A19

SD 2.12.19

A20

SD 2.12.19

Penetration Correction AS (0.1 mm)

Laboratory Code Result Method

1 1.5 AS1289.6.1.1

3 # AS 1289.6.1.1

4 # AS 1289.6.1.1

5 1.6 AS 1289.6.1.1

6 0.2 AS 1289.6.1.1

7 # AS1289.6.1.1

9 2.9 AS 1289.6.1.1

10 1.8 AS 1289.6.1.1

11 2.5 AS 1289.6.1.1

12 # AS 1289.6.1.1

13 # AS 1289.6.1.1

14 1.8 AS1289.6.1.1/AS1289.2.1.1

15 1.0 AS 1289.6.1.1

16 1.8 AS 1289.6.1.1

18 5.0 AS 1289.6.1.1

19 # AS 1289.6.1.1

20 # AS 1289.6.1.1

21A 1.7 AS 1289.6.1.1

21B 1.0 AS 1289.6.1.1

22 1.2 AS1289.6.1.1

23 1.0 AS1289.6.1.1

25 2.0 AS1289.6.1.1

27 2.8 AS1289.6.1.1

28 1.7 AS 1289.6.1.1

29 # AS 1289.6.1.1

31 0.8 AS 1289.6.1.1

32 1.8 AS 1289.6.1.1

33A 2.3 RMS T117

33B 2.30 T117

34 2.4 AS 1289.6.1.1

36 1.4 AS 1289.6.1.1

38 1.8 AS 1289.6.1.1

40 # AS 1289.5.1.1

42 0.5 AS 1289.6.1.1

43A 2.5 AS1289.6.1.1

46 2.4 AS1289.6.1.1

47 2.2 AS 1289.6.1.1

A21

SD 2.12.19

Penetration Correction AS (0.1 mm)


48 1.142 AS 1289.6.1.1

49 3 AS 1289.6.1.1

50 1.0 AS 1289.6.1.1

53 2.4 AS 1289.6.1.1

54 2.4 AS 1289.6.1.1

56A 0.9 #

56B # AS 1289.6.1.1

56C 0.865 AS 1289.6.1.1

56D 1.906 AS 1289.6.1.1

57 # AS 1289.6.1.1

59 3.0 AS 1289.6.1.1

60 1.0 AS 1289.6.1.1

62 3.0 AS 1289.6.1.1

63 1.9 AS 1289.6.1.1

65 2.8 AS 1289.6.1.1

66 2.3 AS 1289.6.1.1

No. of Results 42

Minimum 0.2

Maximum 5.0

Notes:


A22

SD 2.12.19

Compaction Apparatus Type AS

Laboratory Code Type

1 Manual

3 Manual

4 Manual

5 Mechanical

6 Manual

7 Manual

9 Manual

10 Manual

11 Mechanical

12 Manual

13 Manual

14 Manual

15 Mechanical

16 Manual

18 #

19 Manual

20 Manual

21A Manual

21B Manual

22 Manual

23 Mechanical

25 Manual

27 Manual

28 Manual

29 Manual

31 Manual

32 #

33A Manual

33B Manual

34 Manual

36 Manual

38 Manual

40 Manual

42 Mechanical

43A Manual

46 Manual

47 Mechanical

A23

SD 2.12.19

Compaction Apparatus Type AS


48 Manual

49 Mechanical

50 Manual

53 Manual

54 Manual

56A Manual

56B Manual

56C Manual

56D Manual

57 Mechanical

59 Manual

60 Mechanical

62 Manual

63 Manual

65 Mechanical

66 Mechanical

Notes:


A24

SD 2.12.19

Swell Measurements AS (0.5%)


1 -0.5 AS1289.6.1.1

3 0.0 AS 1289.6.1.1

4 -0.5 AS 1289.6.1.1

5 0.0 AS 1289.6.1.1

6 0.0 AS 1289.6.1.1

7 -0.5 AS1289.6.1.1

9 0.0 AS 1289.6.1.1

10 0.0 AS 1289.6.1.1

11 0.0 AS 1289.6.1.1

12 0.0 AS 1289.6.1.1

13 0.00 AS 1289.6.1.1

14 -0.5 AS1289.6.1.1/AS1289.2.1.1

15 0.0 AS 1289.6.1.1

16 0.0 AS 1289.6.1.1

18 0 AS 1289.6.1.1

19 -0.3 AS 1289.6.1.1

20 0.0 AS 1289.6.1.1

21A -0.5 AS 1289.6.1.1

21B -0.5 AS 1289.6.1.1

22 -0.5 AS1289.6.1.1

23 0 AS1289.6.1.1

25 -0.5 AS1289.6.1.1

27 -0.5 AS1289.6.1.1

28 0.0 AS 1289.6.1.1

29 -0.5 AS 1289.6.1.1

31 0.0 AS 1289.6.1.1

32 -0.5 AS 1289.6.1.1

33A -0.5 RMS T117

33B 0.01 T117

34 -0.5 AS 1289.6.1.1

36 0 AS 1289.6.1.1

38 0.0 AS 1289.6.1.1

40 Initial: 0.80, Final: 0.10 AS 1289.5.1.1

42 0 AS 1289.6.1.1

43A 0.0 AS1289.6.1.1

46 -0.5 AS1289.6.1.1

A25

SD 2.12.19

Swell Measurements AS (0.5%)


47 -0.23 AS 1289.6.1.1

48 0.5 AS 1289.6.1.1

49 -1.0 AS 1289.6.1.1

50 -0.5 AS 1289.6.1.1

53 -0.5 AS 1289.6.1.1

54 0.0 AS 1289.6.1.1

56A -0.5 #

56B 0.0 AS 1289.6.1.1

56C -1.5 AS 1289.6.1.1

56D -0.5 AS 1289.6.1.1

57 0.0 AS 1289.6.1.1

59 -0.5 AS 1289.6.1.1

60 0.0 AS 1289.6.1.1

62 -0.5 AS 1289.6.1.1

63 0.0 AS 1289.6.1.1

65 -0.5 AS 1289.6.1.1

66 0.0 AS 1289.6.1.1

No. of Results 39

Minimum -1.5

Maximum 0.5

Notes:


A26

SD 2.12.19

Moisture Content Of The Top 30 mm Of The Specimen After Penetration AS (0.1%)


1 10.0 AS1289.6.1.1

3 8.2 AS 1289.6.1.1

4 9.9 AS 1289.6.1.1

5 8.9 AS 1289.6.1.1

6 8.9 AS 1289.6.1.1

7 9.4 AS1289.6.1.1

9 9.7 AS 1289.6.1.1

10 9.3 AS 1289.6.1.1

11 10.4 AS 1289.6.1.1

12 9.5 AS 1289.6.1.1

13 8.9 AS 1289.6.1.1

14 9.9 AS1289.6.1.1/AS1289.2.1.1

15 9.6 AS 1289.6.1.1

16 10.1 AS 1289.6.1.1

18 10.0 AS 1289.6.1.1

19 9.3 AS 1289.6.1.1

20 10.1 AS 1289.6.1.1

21A 9.8 AS 1289.6.1.1

21B 9.4 AS 1289.6.1.1

22 8.5 AS1289.6.1.1

23 9.7 AS1289.6.1.1

25 10.6 AS1289.6.1.1

27 9.6 AS1289.6.1.1

28 8.1 AS 1289.6.1.1

29 9.7 AS 1289.6.1.1

31 10.5 AS 1289.6.1.1

32 7.7 AS 1289.6.1.1

33A 9.6 RMS T117

33B 9.6 T117

34 10.6 AS 1289.6.1.1

36 9.9 AS 1289.6.1.1

38 10.5 AS 1289.6.1.1

40 8.3 AS 1289.5.1.1

42 8.9 AS 1289.6.1.1

43A 9.8 AS1289.6.1.1

A27

SD 2.12.19

Moisture Content Of The Top 30 mm Of The Specimen After Penetration AS

(0.1%)


46 9.5 AS1289.6.1.1

47 9.4 AS 1289.6.1.1

48 10.4 AS 1289.6.1.1

49 9.4 AS 1289.6.1.1

50 9.8 AS 1289.6.1.1

53 10.1 AS 1289.6.1.1

54 9.5 AS 1289.6.1.1

56A 9.4 #

56B 9.9 AS 1289.6.1.1

56C 10.0 AS 1289.6.1.1

56D 9.5 AS 1289.6.1.1

57 9.8 AS 1289.6.1.1

59 9.6 AS 1289.6.1.1

60 10.5 AS 1289.6.1.1

62 9.2 AS 1289.6.1.1

63 9.8 AS 1289.6.1.1

65 9.5 AS 1289.6.1.1

66 8.8 AS 1289.6.1.1

No. of Results 53

Minimum 7.7

Maximum 10.6

Notes:


A28

SD 2.12.19

CBR 2.5 mm Uncorrected Q (1%)

Laboratory Code Result Robust

Z-Score Method

2 24 -0.42 Q113C

5 61 1.42 Q113C

8 53 1.02 Q113C

24 34 0.07 Q113C

30 31 -0.07 Q113C

37 70 1.87 Q113C

45 36 0.17 Q113C

55 24 -0.42 Q113C

61 29 -0.17 Q113C

62 19 -0.67 Q113C

No. of Results 10

Median 32.5

Normalised IQR 20.0


7.9

Robust CV 61.7%

Minimum 19

Maximum 70

Range 51

A29

SD 2.12.19

CBR 2.5 mm Corrected Q (1%)


Score Method

2 34 -0.90 Q113C

5 80 2.86 ? Q113C

8 69 1.96 Q113C

24 46 0.08 Q113C

30 45 0.00 Q113C

37 # N/A Q113C

45 48 0.25 Q113C

55 34 -0.90 Q113C

61 39 -0.49 Q113C

62 30 -1.23 Q113C

No. of Results 9

Median 45.0

Normalised IQR 12.2


5.1

Robust CV 27.2%

Minimum 30

Maximum 80

Range 50

Notes:


N/A indicates not applicable

A30

SD 2.12.19

CBR 5.0 mm Uncorrected Q (1%)


Z-Score Method

2 54 -0.56 Q113C

5 97 0.91 Q113C

8 96 0.87 Q113C

24 66 -0.15 Q113C

30 75 0.15 Q113C

37 100 1.01 Q113C

45 80 0.33 Q113C

55 56 -0.50 Q113C

61 57 -0.46 Q113C

62 60 -0.36 Q113C

No. of Results 10

Median 70.5

Normalised IQR 29.2

Uncertainty of the Median 11.6

Robust CV 41.4%

Minimum 54

Maximum 100

Range 46

A31

SD 2.12.19

CBR 5.0 mm Corrected Q (1%)


Score Method

2 62 -0.64 Q113C

5 110 1.56 Q113C

8 107 1.42 Q113C

24 76 0.00 Q113C

30 90 0.64 Q113C

37 # N/A Q113C

45 90 0.64 Q113C

55 64 -0.55 Q113C

61 65 -0.50 Q113C

62 70 -0.27 Q113C

No. of Results 9

Median 76.0

Normalised IQR 21.9


Robust CV 28.8%

Minimum 62

Maximum 110

Range 48

Notes:


N/A indicates not applicable

A32

SD 2.12.19

Achieved Dry Density Before Soaking Q (0.01 t/m3)


Score Method

2 2.09 -0.88 Q113C

5 2.08 -2.05 ● Q113C

8 2.09 -0.88 Q113C

24 2.095 -0.29 Q113C

30 2.10 0.29 Q113C

37 2.10 0.29 Q113C

45 2.09 -0.88 Q113C

55 2.10 0.29 Q113C

61 2.10 0.29 Q113C

62 2.11 1.47 Q113C

No. of Results 10

Median 2.098

Normalised IQR 0.009


Robust CV 0.4%

Minimum 2.08

Maximum 2.11

Range 0.03

Notes

● indicates that laboratory 5 result is correct based on the requirements of the standard

A33

SD 2.12.19

Achieved Dry Density Before Soaking Q (0.01 t/m3)


Z-Score Method

2 9.7 0.59 Q145/AS 1289.2.1.1

5 10.3 4.10 ● AS 1289.2.1.1

8 9.7 0.59 Q113C

24 9.7 0.59 Q113C

30 9.3 -1.76 AS 1289.2.1.1

37 9.5 -0.59 #

45 9.6 0.00 AS 1289.2.1.1

55 9.6 0.00 AS 1289.2.1.1

61 9.5 -0.59 AS 1289.2.1.1

62 9.3 -1.76 #

No. of Results 10

Median 9.60

Normalised IQR 0.17


Robust CV 1.8%

Minimum 9.3

Maximum 10.3

Range 1.0

Notes:


● indicates that laboratory 5 result is correct based on the requirements of the standard

A34

SD 2.12.19

Penetration Correction Q (0.1 mm)


2 0.5 Q113C

5 0.5 Q113C

8 0.5 Q113C

24 1.4 Q113C

30 0.5 Q113C

37 # Q113C

45 0.5 Q113C

55 1.5-6.5 Q113C

61 0.5 Q113C

62 0.5 Q113C

No. of Results 8

Minimum 0.5

Maximum 1.4

Notes:


Compaction Apparatus Type Q


2 Manual

5 Mechanical

8 Manual

24 Manual

30 Manual

37 Manual

45 Manual

55 Mechanical

61 Manual

62 Manual

A35

SD 2.12.19

Swell Measurements Q (0.5%)


2 -1.0 Q113C

5 0.0 Q113C

8 -0.2 Q113C

24 -0.5 Q113C

30 0.0 Q113C

37 # Q113C

45 0.0 Q113C

55 0.0 Q113C

61 -0.5 Q113C

62 -0.5 Q113C

No. of Results 9

Minimum -1.0

Maximum 0.0

Moisture Content Of The Top 30 mm Of The Specimen

After Penetration Q (0.1%)


2 8.6 Q145/AS 1289.2.1.1

5 9.5 AS 1289.2.1.1

8 8.6 Q113C

24 9.9 Q113C

30 9.0 AS 1289.2.1.1

37 # #

45 8.9 AS 1289.2.1.1

55 10.1 AS 1289.2.1.1

61 9.3 AS 1289.2.1.1

62 10.0 #

No. of Results 9

Minimum 8.6

Maximum 10.1

Notes:


B1

SD 2.12.19

APPENDIX B

Homogeneity and Stability Testing

Homogeneity…………………………………………………………………….………….B2

Stability Testing…………………………………………………………………………….B3

B2

SD 2.12.19

Homogeneity

The samples utilised in this program were supplied by Soil Engineering Services Pty Ltd, Townsville Laboratory. Ten samples were randomly selected and CBR test was performed as per AS 1289.6.1.1. The results of the homogeneity testing, along with summary statistics are provided in the tables below. Analysis of this data indicates that the samples were sufficiently homogeneous and therefore, any results later identified as outliers could not be attributed to sample variability.

Method AS 1289.6.1.1

CBR @

2.5 mm

(1%)

Corrected

CBR @

5.0 mm

(1%)

Corrected

Achieved

Dry Density

before

soaking

(0.01 t/m3)

Achieved

Moisture

Content before

soaking (0.1

%)

Compaction

Apparatus

Type (Manual

or Mechanical)

Swell

Measurements

(0.5%)

Moisture content of

the top 30mm of the

specimen after

penetration (0.1%)

Sample Number

3 82 100 2.09 9.7 Manual -1 8.3

7 109 114 2.07 10.2 Manual -1 8.5

35 124 135 2.11 9.2 Manual -0.5 8.4

36 73 84 2.09 9.8 Manual -1 8.4

38 67 85 2.10 9.5 Manual 0 8.4

61 96 118 2.12 9.4 Manual 0 8.2

63 96 118 2.09 10.0 Manual -0.5 8.7

65 88 108 2.06 9.6 Manual -1 8.7

97 116 133 2.10 9.7 Manual 0 9.4

131 91 113 2.11 9.5 Manual 0 8.4

Mean 94.2 110.8 2.094 9.66

Standard Deviation 17.25 16.45 0.02 0.28

Coefficient of Variation (CV) (%) 18.31% 14.85% 0.83% 2.86%

Lowest Value 67 84 2.06 9.2

Highest Value 124 135 2.12 10.2

Range 57 51 0.06 1

B2

SD 2.12.19

Stability Testing

Due to the nature of the samples it was not considered necessary to perform stability testing.

B3

C1

SD 2.12.19

APPENDIX C

Documentation

Instructions to Participants ……………………………………………………………… C2

Results Sheet ……………………………………………………………………………. C4

C2

SD 2.12.19

PROFICIENCY TESTING AUSTRALIA

Proficiency Testing Program

Soils Round 28: California Bearing Ratio

INSTRUCTIONS TO PARTICIPANTS - AS 1289.6.1.1

Testing can be performed either according to AS 1289.6.1.1 or to Q113C.

Please read instructions carefully BEFORE commencing testing. To ensure that the results of this program can be analysed properly, participants are asked to carefully note the following:

Please ensure the results are recorded to the accuracy indicated on the results sheets for

analysing purposes

1. Assigned values: SMDD 2.097 t/m3 and SOMC 9.7%

2. Prepare sample by sieving over a 19.0 mm sieve and DISCARD MATERIAL RETAINED

on the sieve.

3. Adjust moisture content of sample as per test method mixing thoroughly at intervals.

4. Allow sample to cure for 48hrs for proficiency comparison purposes only.

5. As per test method, prior to compaction, take a moisture content to determine final moisture content has not differed by more than 0.5%. If this is not been achieved, adjust moisture content to required level.

6. Perform AS 1289.6.1.1

Determination of the California Bearing Ratio of a soil, following the criteria set out below:

- Use an SMDD of 2.097 t/m³.

- Sample to be remoulded at 100% standard compaction and 100% SOMC in three layers. Compactive effort: standard compaction.

- The surcharge mass to be applied = 4.5 kg

- 4 day soaked test.

- Swell Measurements to be recorded and Swell % calculated.

- Seat the penetration piston by applying a force of 45 N then zero the force of the measuring device.

7. Report results (to the accuracy indicated) on the provided “Results Sheet”. Results are to

include an attached plot of the penetration data.

Laboratories are to perform tests according to their accredited method.

After all testing has been completed, laboratories are asked to seal and retain any of the remaining samples for at least 3 months.

Testing may commence as soon as the sample and documentation are received. Please

return results no later than 30 October 2020 to:

Emilia Cincu

Email: [email protected]

Fax: 02 9743 666

C3

SD 2.12.19

PROFICIENCY TESTING AUSTRALIA

Proficiency Testing Program

Soils Round 28: California Bearing Ratio

INSTRUCTIONS TO PARTICIPANTS - Q113C

Testing can be performed either according to AS 1289.6.1.1 or to Q113C.

Please read instructions carefully BEFORE commencing testing. To ensure that the results of this program can be analysed properly, participants are asked to carefully note the following:

Please ensure the results are recorded to the accuracy indicated on the results sheets for

analysing purposes

1. Assigned values: SMDD 2.097 t/m3 and SOMC 9.7%

2. Prepare sample by sieving over a 19.0 mm sieve and DISCARD MATERIAL RETAINED

on the sieve.

3. Take a hygroscopic moisture content.

4. Adjust moisture content of sample to the nominated SOMC as per test method mixing thoroughly at intervals.

5. Allow sample to cure for 48hrs for proficiency comparison purposes only.

6. Perform Q113C

Determination of the California Bearing Ratio of a soil, following the criteria set out below:

- Use an SMDD of 2.097 t/m³ - Sample to be remoulded at 100% standard compaction and 100% SOMC in three

layers. Compactive effort: standard compaction.

- The surcharge mass to be applied = 4.5 kg

- 4 day soaked test - Swell Measurements to be recorded and Swell % calculated - Seat the penetration piston by applying a force of 45 N then Zero the force of the

measuring device.

2. Report results (to the accuracy indicated) on the provided “Results Sheet”. Results are to

include an attached plot of the penetration data.

Laboratories are to perform tests according to their accredited method.

After all testing has been completed, laboratories are asked to seal and retain any of the remaining samples for at least 3 months.

Testing may commence as soon as the sample and documentation are received. Please

return results no later than 30 October 2020 to:

Emilia Cincu

Email: [email protected]

Fax: 02 9743 666

C4

SD 2.12.19

C5

SD 2.12.19

C6

SD 2.12.19

- End of Report -

report no. 1228 soils proficiency testing program round 28

Documents