Researches of RCC super retarding compound additive

In connection with the design requirements and construction conditions of the Linhekou RCC arch dam, a new type super retarding compound additive is developed on the basis of study on retarding compound additive. Considering the mechanism of cement hydrating rate, the effects of super retarding compound additive on RCC initial setting time and the mixture's mechanic property are studied and extensive tests are carried out both in laboratory and field on RCC. Based on the test results, it is shown that the additive has good effects and its quality is stable. 