application of a materials-related distress rating system for portland cement concrete airfield...
Post on 21-Jan-2016
218 Views
Preview:
TRANSCRIPT
Application of a Materials-Related Distress Rating System for Portland Cement
Concrete Airfield Pavements
Presented to the FAA Technology Transfer ConferenceAtlantic City, New Jersey
April 20 to 22, 2010
David Peshkin, P.E.
AcknowledgmentsApplied Pavement Technology, Inc.
Co-Authors
Tom Van DamJim Bruinsma
Background Properly designed and constructed PCC
generate expected M&R deterioration patterns Early, a pavement may lose 1 to 2 PCI
points/year; later, perhaps 2 to 4 Deterioration of PCC pavements with MRD is
extremely variable M&R options for MRD-affected pavements are
different and may not be appropriate for same period
Background (continued)
In 2009, APTech performed a project-level evaluation of a PCC feature with MRD
Evaluation included PCI, MRDR, limited petrographic, and FWD testing
Goal was to develop an M&R plan
PCI Evaluation
PCI performed at project level MRD survey procedure triggered by specific
distresses
PCI Results
Section PCI% Due To
Load Climate Other10 72 4 61 3520 81 7 49 4430 80 6 35 5940 80 59 29 12
Area-weighted PCI = 80 Overall good condition
PCI Distresses Corner Break (L, M) Linear Cracking (L, M) Durability Cracking (L, M, H) Joint Seal Damage (M) Popouts Small Patch (L, M, H) Large Patch (L, M) Map Cracking (M) Pumping Shrinkage Cracking Joint Spall (L, M, H) Corner Spall (L, M, H)
Deterioration (PCI)
PCI
Age
0
25
50
75
100
0 5 10 15 20
Critical PCI of 65 reached in 8 more years
Section 10 MRDR = 88
76
107
75
102
37
96
124
0
50
100
150
200
250
300
350
400
MR
D R
atin
g
08 11 16 21 22 25 30
Sample Unit Number
Section 20 MRDR = 103
10394
104
63 62
117 116
38
99
5469
114
3649
7184
167
65
42 36
373
304
0
50
100
150
200
250
300
350
400
MR
D R
atin
g
02 12 25 35 45 55 65 75 95 104 111 124 130 141 150 157 160 170 180 190 198 208
Sample Unit Number
Section 30 MRDR = 54
119
5440
47 50 47 4533
0
50
100
150
200
250
300
350
400
MR
D R
atin
g
07 13 17 25 27 33 39 45
Sample Unit Number
Primary MRD Indicators
Parallel cracking Perpendicular cracking Honeycombing Popouts Patching Staining
Parallel Cracking (L), Discoloration and Staining
Perpendicular and Parallel Cracking (L), Discoloration and Staining
Perpendicular and Parallel Cracking (M), Discoloration and Staining
Petrographic Examination
• Coarse aggregate is limestone and dolomitic limestone
• Fine aggregate is siliceous material (quartz and feldspar)
• All PCC includes Class C fly ash
• ASR identified in all cores
• Micro-cracking and gel are localized
Petrographic Examination
Lessons Learned
PCI indicates generally good conditions MRDR indicates one section already
requires significant rehabilitation, and two others will require rehabilitation within several years
In this instance, MRDR is better suited to assess FOD risk and plan for future M&R
Thank You!
David PeshkinApplied Pavement Technology, Inc.www.appliedpavement.com217.398.3977
dpeshkin@appliedpavement.com
top related