碾压混凝土及其原材料若干特性探讨

Research on Several Characteristics of the RCC and Its Raw materials

本文对碾压混凝土筑坝技术中存在的一些影响施工或混凝土质量的问题进行探讨,如粉煤灰掺量与龄期强度关系、混凝土扰动对VC值和凝结时间的影响、不同环境对混凝土VC值和凝结时间的影响、人工砂代替胶凝材料中粉煤灰对混凝土强度的影响、不同粉煤灰在净浆和胶砂中的用水量特性等问题,并提出了作者的观点。

This article discusses some problems which impact the construction of darn or quality of concrete that existing in the RCC dam construction techniques, such as the relationship between the intermingled quantity of fly ash and the strength of age, the impact to the VC value and coagulation time caused by concrete disturbance and different environments, the impact to concrete strength by replacing the fly ash in binder of concrete material to artificial sand, and the characteristics of water consumption of dif- ferent fly ash in neat cement paste and mortar and so on, and put forward the author＇s point of view as well.