Influence of mixing process of high performance concrete

Abstract

In this paper, three kinds of concrete mixing processes are studied, which are cement coating method, cement mortar method and cement paste method. Three mixing processes were compared with conventional method to explore the effect of the mixing process under vibration stirring on the working performance and mechanical properties of fresh concrete. Concrete slump, expansion, inverted slump cylinder emptying time, gas content and compressive strength were tested on a twin-shaft vibrating mixer to compare the differences in concrete workability and mechanical properties under different mixing processes. The results show that the cement coating method and the cement paste method have obvious effects on the improvement of concrete workability and compressive strength. The cement mortar method is superior to the common process in terms of mechanical properties, and the workability is not much different.