Materials selection for concrete overlays : the final report Page: 70
xviii, 192 p. : col. ill. ; 28 cm.View a full description of this report.
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Figure 4.9. Pull-off testing
4.4.7 Customized Restrained Shrinkage
Initial plan of the research was to perform restrained shrinkage tests according to ASTM
C1581 -09a "Standard Test Method for Determining Age at Cracking under Restrained
Shrinkage" as a part of the laboratory testing phase. However, based on the past experiences
with the unreliability of the test procedures, equipment, and the results at CMRG, a customized
test to measure restrained shrinkage cracking was developed. To more closely simulate the
dimensional constraints on typical roadways, long and thin bonded concrete overlay slabs (9-in.
by 3-in. by 8-ft.) were placed on cured concrete substrates outside as seen in Figure 4.10. This
geometry induces transverse cracks in the specimens by making the specimens long and thin and
restrained to the existing slab.Figure 4.10. Customized Restrained Shrinkage Slabs
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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/m1/90/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.