Materials selection for concrete overlays : the final report Page: 55
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Table 3.12: Summary of westbound condition survey on IH-10
Mileage Distance Transverse Minor Pat Average Crack Comments
ft Cracks Spalls Spacing (ft)
0.0 to 0.1 528 84 6.3
0.1 to 0.2 528 63 1 8.4 Small PCC patch with small delamination adjacent
0.2 to 0.3 528 83 6.4 Longitudinal crack. Two small delaminated areas
0.3 to 0.4 528 93 5.7 Longitudinal crack. Three small delaminated areas
0.4 to 0.5 528 63 8.4 Two small delaminated areas
0.5 to 0.6 528 73 7.2 One small delaminated area
0.6 to 0.7 528 82 1 6.4 Three small delaminations and one large delamination
0.7 to 0.73 160 12 13.3 Two small delaminated areas
Table 3.13: Summary of eastbound condition survey on IH-10
Mileage Distance Transverse Minor Patches Average Crack Comments
ft Cracks Spalls Spacing (ft)
0.0 to 0.1 528 67 4 7.9
0.1 to 0.2 528 53 4 1 10.0 PCC Patch, one small delamination
0.2 to 0.3 528 86 6.1 One small delaminated area
0.3 to 0.4 528 85 5 6.2
0.4 to 0.5 528 103 2 5.1
0.5 to 0.6 528 99 5.3
0.6 to 0.7 528 71 1 7.4
0.7 to 0.75 264 23 3 11.5 PCC Patches at the joint at the end of BCO,
some delamination there
The overlay was in very good condition. This may be due to the fact that the cohesive
strength and stiffness of the overlay were designed for very high early strength requirements, and
this often results in very high ultimate strengths at full maturity. There were only a few patches,
and several spalls, which were all very minor. The tables indicate the presence of several
delaminated areas. However, those delaminations do not seem to be causing performance
problems to the BCO, since they were not related to any distresses on the surface. None of the
delaminations spanned the entire width of the lane. Usually, they start at the longitudinal edge of
the slab and extend toward the center. These might be the same delaminated areas found after the
repairs were completed in 1996. It seems that no subsequent deterioration has occurred, and
regardless of their presence, the overlay has performed well during its service life thus far. A
similar case occurred with the BCO on IH-610 North, in Houston, which showed the presence of
early-age delaminations, but in spite of them, it continued to perform well without any signs of
further deterioration [30].
The survey results also indicate that there were no punchouts, and the crack spacing was
adequate. The cracks were all narrow. The delaminations present at the end of the BCO in the
eastbound direction, an area in which there are several small PCC patches too, seemed to be
related to the joint and the adjacent bridge, rather than being an overlay problem. From the
results of the survey, it seemed that the BCO still has years of service life ahead.55
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Kim, Dong H.; Fowler, David W.; Ferron, Raissa P.; Trevino, Manuel M. & Whitney, David P. Materials selection for concrete overlays : the final report, report, July 2012; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth303706/m1/75/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.