Materials selection for concrete overlays : the final report Page: 41
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Since the BCO was relatively thick to provide more than enough concrete cover for
reinforcement bars, the bars were placed on chairs resting on top of the prepared surface of the
existing pavement. Figure 3.6 shows the chairs used to elevate the reinforcement bars. The
workers were asked to wet the surface before the construction began.- a : . ."- -4 - - " "-" - - :"- -
Ae>-Figure 3.5.: After the removal of the yellow stripe
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pip pim,.
,Ma l"4". 'Figure 3.6.: Reinforcement detail
Transition area reinforcement details are illustrated in Figures 3.7 and 3.8. Transition
areas typically have the highest concentration of dynamic traffic loads; so proper reinforcement
is very important. If bond fails at a transition area, the failure can propagate through the concrete
overlay due to repeated dynamic wheel loads. As the figures show, there is a row of bent
reinforcement extruding from the prepared surface. In cases of poor or uncertain bond or in
areas with specific demands (e.g., high shear or tensile stresses are serious contributors in41
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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/m1/61/?rotate=180: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.