The repair of deteriorated concrete pavements, using roller-compacted latex-modified rapid-hardening cement concrete, has been studied recently .
However, the using amount of rapid-hardening cement is not reduced, so there is a limit to solving the problems caused by the increase in hydration heat in the early age.
A rapid-hardening cement used was the product manufactured by Jungang Polytech, Korea.
In case of concrete pavement repaired using rapid-hardening cement, the traffic open time is specified as a 4-hour minimum curing time by the American Association of State Highway and Transportation Officials (AASHTO) , the road traffic administrations of each state in the United States, and the Korea Expressway Corporation .
In the first step of specimen fabrication, one-third of the mixed latex-modified fiber-reinforced rapid-hardening cement concrete was poured for specimens, and the vibration and pressure tamper was used to apply vibration pressure for 30 s.
Rapid-hardening cement promotes hydration, with an active reaction of 3CaO-Si[O.sub.2], generating acicular crystals of ettringite by the reaction of calcium silicate hydrate (CSH) gel and calcium sulfoaluminate (CSA); this increases the initial strength.
Kang, "Shrinkage cracking of styrene butadiene polymeric emulsion-modified concrete using rapid-hardening cement," Journal of Applied Polymer Science, vol.