Preservation of Rigid Pavement
Preservation of Rigid Pavement
- Full-Depth & Partial-Depth Repairs, Overlays -
Southeast Pavement Preservation Partnership May 29 - 31, 20013
Moon Won Texas Tech University 1
Acknowledgements • • • •
TxDOT Research Committee Members TxDOT District pavement engineers TxDOT District project inspectors Texas Tech students and researchers
2
Outline • • • • •
Background and Objectives Full-Depth Repairs (FDRs) Partial-Depth Repairs (PDRs) Overlays Summary
3
TxDOT PMIS 4
Background and Objectives • Overall, excellent performance of rigid pavements in Texas • Many miles of 50+ years still in service • Preservation becoming a key to TxDOT • Identify best preservation practices.
5
True Punchouts
Construction Joints
Large Surface Defects
Repair Joints
7
8
Causes of Poor Performance of FDRs • Field testing • Laboratory investigations
9
Field Testing •
Deflection Testing with FWD
LTE
10 ft
10 ft
FDR section
LTE
10 ft
10 ft
10
11
FDR-N-4
12
28 ft
Outside Lane Wide crack
12 ft
P1
P2
P3 P4
P5
P6
P7 P8
P9
P10
Point # P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
0
Deflection [mil]
5
10
15
20
25
13
FDR-S-1
14
Outside Lane
10 ft
Half moon crack 7 ft
P1
P2
P3 P4
P6 P7
P5
P9
P8
Point # P1
P2
P3
P4
P5
P6
P7
P8
P9
Deflection [mil]
0
10
20
30
40
15
16
Laboratory Investigations
17
Epoxy Injection Method • Specification • Non-compliance
18
19
20
21
22
Epoxy injecting method 100,000
Steel stress [psi]
80,000 Field NC-#11
60,000
Field NC-#22 Specification
40,000
20,000
0 0
0.1
0.2
0.3
Displacement [in.]
0.4
0.5 23
1.0”- D
7/8”- D
24
Specification Method
Non-Compliance #1
NonCompliance #2
25
26
Partial-Depth Repairs • Many CRCP distresses are not full-depth failures. Distresses are confined to the top half of the slab. • Partial-depth repairs are better repair methods for those distresses.
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
Bonded Concrete Overlay on Deteriorated Jointed Concrete Pavement
44
TxDOT PMIS 45
Pilot Implementation of CRCP Overlay Limits
Cold Milling
47
Rebar Installation
48
Transition Area
49
Surface Cleaning
50
Concrete Placement
51
Curing
52
Completed CRCP BCO
53
Summary • Overall, excellent performance of rigid pavements in Texas • Proper repairs of distresses in rigid pavement should be an essential component of rigid pavement preservation strategy. • CRCP bonded overlay could be an effective preservation strategy for jointed pavements. 54
Thanks!
55
- Full-Depth & Partial-Depth Repairs, Overlays -
Southeast Pavement Preservation Partnership May 29 - 31, 20013
Moon Won Texas Tech University 1
Acknowledgements • • • •
TxDOT Research Committee Members TxDOT District pavement engineers TxDOT District project inspectors Texas Tech students and researchers
2
Outline • • • • •
Background and Objectives Full-Depth Repairs (FDRs) Partial-Depth Repairs (PDRs) Overlays Summary
3
TxDOT PMIS 4
Background and Objectives • Overall, excellent performance of rigid pavements in Texas • Many miles of 50+ years still in service • Preservation becoming a key to TxDOT • Identify best preservation practices.
5
True Punchouts
Construction Joints
Large Surface Defects
Repair Joints
7
8
Causes of Poor Performance of FDRs • Field testing • Laboratory investigations
9
Field Testing •
Deflection Testing with FWD
LTE
10 ft
10 ft
FDR section
LTE
10 ft
10 ft
10
11
FDR-N-4
12
28 ft
Outside Lane Wide crack
12 ft
P1
P2
P3 P4
P5
P6
P7 P8
P9
P10
Point # P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
0
Deflection [mil]
5
10
15
20
25
13
FDR-S-1
14
Outside Lane
10 ft
Half moon crack 7 ft
P1
P2
P3 P4
P6 P7
P5
P9
P8
Point # P1
P2
P3
P4
P5
P6
P7
P8
P9
Deflection [mil]
0
10
20
30
40
15
16
Laboratory Investigations
17
Epoxy Injection Method • Specification • Non-compliance
18
19
20
21
22
Epoxy injecting method 100,000
Steel stress [psi]
80,000 Field NC-#11
60,000
Field NC-#22 Specification
40,000
20,000
0 0
0.1
0.2
0.3
Displacement [in.]
0.4
0.5 23
1.0”- D
7/8”- D
24
Specification Method
Non-Compliance #1
NonCompliance #2
25
26
Partial-Depth Repairs • Many CRCP distresses are not full-depth failures. Distresses are confined to the top half of the slab. • Partial-depth repairs are better repair methods for those distresses.
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
Bonded Concrete Overlay on Deteriorated Jointed Concrete Pavement
44
TxDOT PMIS 45
Pilot Implementation of CRCP Overlay Limits
Cold Milling
47
Rebar Installation
48
Transition Area
49
Surface Cleaning
50
Concrete Placement
51
Curing
52
Completed CRCP BCO
53
Summary • Overall, excellent performance of rigid pavements in Texas • Proper repairs of distresses in rigid pavement should be an essential component of rigid pavement preservation strategy. • CRCP bonded overlay could be an effective preservation strategy for jointed pavements. 54
Thanks!
55
