APPLICATION OF NONDESTRUCTIVE TESTING TECHNOLOGIES IN TEXAS

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APPLICATION OF NONDESTRUCTIVE TESTING
TECHNOLOGIES IN TEXAS
Dar-Hao Chen, Ph.D., P.E. Texas Department of
Transportation
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ACKNOWLEDGEMENTS

• Tom Scullion
• John Bilyeu
• Paul Rollins

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3 yr old 5 inch Ty B, PG76-22-plant 40 mile
away 16inch (lime treated base) Lime treated
subgrade
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5 inch-AC 16inch-lime treated base 12 inch-lime
treated subgrade
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IH20
JCP was overlaid with 6inch AC in 1997 10 mile
project- 5 mile method spec, 5 mile QC/QA
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MP109 WB
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AC
JCP
Inch
MP111
IH30West
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AC
JCP
Core Location
(1) 1500ft West of MP105 (2) 1500ft East of
MP105 (3) 200ft West of MP104 (4) 2300ft West of
MP104
MP105
IH30West
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200ft West of MP104
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Chronic Pavement Distress
Rehabs1996, 2001 (top 2 inch AC) (1) Total AC
4.5-8.5 inch (2) 11 inch sand shell base (3) 8 "
select material (4) 6" lime treated subgrade
Condition in 2004
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20 million ESAL 2004-2024
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Bridge
Problem Area at 2
Strong Red/Blue indicates porous layer
Problem Area at 4
Severe surface distress
US69S-Outside Lane
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Location 400
Porous layer that lead to debonding
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Location 750
Porous layer that lead to debonding
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Location 400
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Is it ok to overlay aged CRCP, JCP pavement? What
is the vertical movement on the joint/crack?
CRCP built in 1960s First major rehab
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Rolling Dynamic Deflectometer (RDD)
Diesel Engine powers Hydraulic Loading System
Hydraulic Loading System
Loading Rollers
Rolling Sensors
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IH20, 4inch AC on CRCP
I20W
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SH 3 Houston Crack Retarding Layers Strata vs
Petromat vs Control Traditional Mixes do not
stop Reflection Cracks
Strata Type D Cycles to failure 750
24 months old overlay over JCP
Control Type D cycles to failure 20
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IH20, 4inch AC on CRCP
I20W
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I-20 Marshall, TX RDD Deflections, Westbound,
Outside Lane, Outside Wheelpath March 2001 -
Section 1
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Sensor 1 - Before Milling
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Baseline
2X Baseline
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3X Baseline
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10-kips Displacement (mils)
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15
10
5
0
3100
2900
2700
2500
2300
2100
1900
1700
1500
1300
1100
Distance (feet)
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One Year
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Is it ok to overlay aged CRCP, JCP pavement? What
is the vertical movement on the joint/crack?
CRCP built in 1960s First major rehab
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US96
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LTE 27-70
8 inch JCP, 1957 PFC, SMA, Ty D
5 million ESAL-20 yrs
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Badly Distressed
No Distresses
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SH73WB
3.5 inch AC-1994 pressure grout-1994 11 inch
JCP-1958 LTS-1958
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West Bound
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Section 4
Section 3
Section 1
Section 2
Dowel Section
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US82
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IH 45 NB Section 1 TRM 7 .2 to TRM 8 .8
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IH45
Joints
Joint Quality
Base Quality
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• Two out of 13

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Sta.43437 pg1
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