To improve the cement-aggregate bond and the F-T durability, a styrene butadiene rubber (SBR)
latex was used. The SBR latex is approved by the Federal Highway Administration for latex
modified concrete use in bridge deck overlays (Ramakrishnan 1992). The SBR used had a solid
content of 48% and pH of 10. Various amount of polypropylene fiber is also used in selected
PCPC mixes.