significant work. extraordinary people. sra. cc6 distress mapping pavement working group 2012 sra...
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Significant Work. Extraordinary People. SRA.
CC6 Distress Mapping
Pavement Working Group 2012
SRA International
Federal Aviation Administration
April 24 – 26, 2012
By: Josh Davis
2Significant Work. Extraordinary People. SRA.
Outline
• CC6 Pavement Design• SOW Objectives• Trafficking Plan• Distress Mapping• SCI Evaluation• NDT Imaging Survey• Conclusions• Questions
3Significant Work. Extraordinary People. SRA.
CC6 Pavement Design
P-403 Base Course
P-154 Subbase Course
ReworkedSubgrade
P-306 Econocrete Base
P-501 Concrete Pavement
4Significant Work. Extraordinary People. SRA.
SOW Objectives
• Primary– Effect of flexural strength on structural life
• Secondary– Effect of modulus of elasticity on structural life
– Compare econocrete and HMA stabilized base
– Compare thickened edge and reinforced isolation joint
– Grooving research
– PSPA standard for rigid pavements
– GPR Assessment
– Compaction requirements under rigid pavements
5Significant Work. Extraordinary People. SRA.
Test Plan
6N 25S6S25N
5N 24N 5S 24S
4N 23N 4S 23S
27
28
29 30
53
54
57
108
111
117119 120
123
124
128
131
136137
140 142
143
144
TRACK -4
TRACK -2
TRACK 0
TRACK 2
TRACK 4
TRACK 3
TRACK 1
TRACK -1
TRACK -3
3N 22N 3S 22S
2N 21N 2S 21S
1N 20N 1S 20S
2
3
3N22N
3S 22S
2N 21N 2S 21S
1N 20N 1S 20S
1
2
314
12
13
118 9
7
10
3N22N
3S 22S
2N 21N 2S 21S
1N 20N 1S 20S
1
2
314
12
13
118 9
7
10
19
15
18
17
16
20
21
22
23
242526
3N
22N
3S 22S
2N 21N 2S 21S
1N 20N 1S 20S
1
2
314
12
13
118 9
7
10
19
15
18
17
16
20
21
22
23
242526
4445
48
4950 51
52
59 58 57
3N
22N
3S 22S
2N 21N 2S 21S
1N20N
1S 20S
1
2
314
12
13
118 9
7
10
19
15
18
1716
20
21
22
23
242526
4445
48
4950 51
52
59 58 57
62
63
61
64
65
68
67
66
69
70
76
71
72
73
74
75
77
7879
8180
83
84
85
86
87
88
89
90
91
92
93
94
95
3N
22N
3S 22S
2N 21N 2S 21S
1N20N
1S 20S
12
314
12
13
118 9 7
10
19
15
18
1716
20
21
22
23
242526
4445
48
4950 51
52
59 58 57
62
63
61
64
65
68
67
66
69
70
76
71
72
73
74
75
77
78
79
8180
83
84
85
86
87
88
89
90
91
92
93
94
95
97
98
99
101
102
103
104
105
107
106
110
109
3N
22N
3S 22S
2N 21N 2S 21S
1N20N
1S 20S
12
314
12
13
118 9
7
10
19
15
18
1716
20
21
22
23
242526
4445
48
4950 51
52
59 58 57
62
63
61
64
65
68
67
66
69
70
76
71
72
73
74
75
77
78
79
8180
83
84
85
86
87
88
89
90
91
92
93
94
95
97
98
99
101
102
103
104
105
107
106
110
109
112
113
114
116
118
121
122
3N
22N
3S 22S
2N 21N 2S 21S
1N20N
1S 20S
12
314
12
13
118 9
7
10
19
15
18
1716
20
21
22
23
242526
4445
48
4950 51
52
59 58
62
63
61
64
65
68
67
66
69
70
76
71
72
73
74
75
77
81
80
83
84
85
86
88
89
90
91
92
93
94
95
97
98
99
101
102
103
104
105
107
106
109
112
113
114
116
118
121
122
125
126
129
130
133
134
135
3N
22N
3S 22S
2N 21N 2S 21S
1N20N
1S 20S
12
314
12
13
118 9
7
10
19
15
18
1716
20
21
22
23
242526
4445
48
4950 51
52
59 58
62
63
61
64
65
68
67
66
69
70
76
71
72
73
74
75
77
81
80
83
84
85
86
88
89
90
91
92
93
94
95
97
98
99
101
102
103
104
105
107
106
109
112
113
114
116
118
121
122
125
126
129
130
133
134
135
138
139
141
8-15-20118-25-20119-08-20119-21-20119-26-201110-07-201110-25-201111-01-2011
8Significant Work. Extraordinary People. SRA.
SCI Evaluation
• Structural Condition Index (SCI) is a numerical value assigned to a pavement based on the structural distresses observed through visual surveys.
• The SCI scale is 0 – 100.• For CC6, SCI values were calculated for each test
item.• End of design life is valued at 80.• Testing parameters dictate testing well beyond the
end of design life.
9Significant Work. Extraordinary People. SRA.
NDT Imaging Survey
• Capable of fast documentation of visible distresses
• Reduces time needed on runways/taxiways
• System cost and maintenance cost
• Massive data storage requirements
• Max. 1mm resolution
10Significant Work. Extraordinary People. SRA.
Conclusions
• CC6 was designed to research the effects of flexural strength and modulus strength of concrete pavements for airport design
• Four of the SOW objectives could be partially achieved by visual survey
• Documentation of the visual survey provides a time history of distresses in relation to passes
• Visual distress surveys can be used for SCI evaluation
• Technology is allowing visual surveys to be conducted at “high speed” reducing down time of runways/taxiways
11Significant Work. Extraordinary People. SRA.
Acknowledgements
• FAA• Dr. Satish Agrawal
• Dr. Gordon Hayhoe
• Jeff Gagnon
• Al Larkin
• SRA• Chuck Teubert
• Jerry Connelly
• Dr. Injun Song
• Jimmy Zargan
• Reni Aponte
• Henry Fermin
12Significant Work. Extraordinary People. SRA.
Questions???