Materials selection for concrete overlays : the final report Page: 32
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Table 3.2: SH146 survey - Southbound direction
Distance Transverse Minor Severe Punchouts Patches Average Crack Comments
Mileage
ft Cracks Spalls Spalls Spacing (ft)
0.0 to 0.1 528 12 44.0
0.1to 0.2 528 ** 2 1 ** Includes a bridge
0.2 to 0.3 528 * 1 1 ** AC patch
0.3 to 0.4 528 ** 1 ** AC patch
0.4 to 0.5 528 ** 2 1 ** AC patch
0.5 to 0.6 528 ** ** Good condition
0.6 to 0.7 528 ** ** Good condition
0.7 to 0.8 528 ** ** Good condition
0.8 to 0.9 528 ** 1 ** Good condition
0.9 to 1.0 528 87 1 6.1
1.0 to 1.1 528 141 3.7
1.1 to 1.2 528 125 1 4.2
1.2 to 1.3 528 76 3 6.9
1.3 to 1.4 528 ** ** Joint damage
1.4 to 2.1 3696 ** ** Entrance ramp
2.1 to 2.2 528 ** 4 2 AC patches. Not many crack
2.2 to 2.3 528 ** 4
2.3 to end ** ** Bridge
Totals 441 7 0 12 5
** Section where cracks and/or distresses could not be counted
3.7 Houston - Beltway 8
On May 19, 2010, a field trip was conducted to visit the BCO project on Beltway 8 in
Houston. The pavement of interest is a 2-in.-thick BCO with steel fibers constructed in 1996, on
Beltway 8, the urban outer loop that surrounds IH-610 in Houston. The BCO project section,
approximately 5.3 miles long, is located between Greenspoint Drive, just east of IH-45, and
Aldine Westfield, near Houston's George Bush Intercontinental Airport. The original 13-in.-
thick CRCP structure, built in 1984, experienced a severe spalling problem just a few years after
construction. By 1995, when the overlay rehabilitation project was undertaken, the CRCP
section was in poor condition. A CTR investigation on that pavement concluded that the reasons
for the spalling were high evaporation rates and high daily temperature differentials that occurred
during the construction. Falling Weight Deflection tests were performed, and core samples were
extracted at the time to evaluate the structural integrity of the pavement. The tests showed that
the spalling problem was only superficial, and it did not significantly affect the load-carrying
capacity of the pavement, making it a good candidate for BCO rehabilitation. As a result of that
study, a 2-in.-thick BCO reinforced with steel fibers was designed and constructed in 1996.
3.7.1 Condition Survey
The survey consisted of a visual inspection of the outside lane of the BCO, observing the
cracks and distress, and taking photographs. Because the road was open for traffic, it was not
possible to walk the section to conduct this survey in more detail. The survey was performed
while driving at a very low speed on the outside traffic lane, while a cushion truck and a shadow
vehicle, provided by the district, moved along behind the survey vehicle for protection. The
survey started with the westbound section, from Aldine Westfield, and proceeded to Greenspoint
Dr., followed by the eastbound section.32
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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/m1/52/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.