Study on Admixture of Super Retarding Concrete

Abstract

This paper mainly studies the influence of five kinds of retarding materials, such as sodium gluconate, sugar, citric acid, maltodextrin and sodium tripolyphosphate, on the setting time of concrete. Through gradient experiment of five different retarders, the influence of the amount of five kinds of retarders on the setting time and strength of concrete is obtained. The experimental results show that different kinds of retarders have different effects on the setting time and compressive strength of concrete. The use methods of super retarded concrete admixtures in 30 hours, 40 hours, 50 hours and 60 hours are obtained by orthogonal experiment.