Experimental study on mix proportion of green environmental protection type three-doped fair-faced concrete

Abstract

Fair-faced concrete has been favored by the majority of architectural and structural designers. In response to the sustainable development strategy of our government, this paper studies the green environment-friendly fair-faced concrete mixed with agricultural and industrial wastes. Based on the statistical analysis of the existing literature on fair-faced concrete, the green environmental protection of fair-faced concrete was considered comprehensively. The mix proportion of “three-doped” fair-faced concrete mixed with ground rice husk ash, fly ash and mineral powder, which replaced the cement amount by 8%, 20% and 6% respectively, and its influence on compressive strength were studied through experiments. The experimental results show that the green environmental protection type fair-faced concrete mixed with rice husk ash, fly ash and mineral powder can achieve requirements of the compressive strength by the design. And the growth rate of compressive strength from the 28th day to the 56th day is higher than that of ordinary fair-faced concrete. At the same time, the curve equation of the relationship between the compressive strength and the age is put forward, and the fit is good, which can provide reference for the design of similar concrete mix proportion.