Examination from Respect of Material Concerning Practical Use of Expansive Fiber Reinforced Regulated Set Concrete

Abstract

 Fiber reinforced regulated set concrete has the feature of easily controlled setting time, and high initial strength. However it is possible that cracks may appear due to autogenous shrinkage and heat of hydration in its early age. This study investigates the practical use of expansive fiber reinforced regulated set concrete, prepared by mixing high responsive type expansive admixture and fiber reinforced regulated set concrete, to reduce autogenous shrinkage. This report grasps the various physical properties of expansive fiber reinforced regulated set concrete, standard mix proportion and process of manufacture was constructed based on those properties. This report also looks at the importance of heat curing at the low temperature and selection of setting retarders at high temperature for concrete with enough performance.