Study on Mix Proportion Design and Compressive Strength of Environment-Friendly Three-Admixture Concrete

In this paper, the environment-friendly three-admixture concrete was prepared by using straw powder (rice husk powder) to replace cement by 6% and 8%, silicon powder by 10% and fly ash by 20%, respectively, and the effects of straw powder (rice husk powder), silicon powder and fly ash on the compressive strength of concrete were studied. Through the comparative analysis of the compressive strength of 9 groups three-mixed concrete blocks, the compressive strength of concrete reached the highest when the content of straw powder (rice husk powder) was 6%. On the basis of the current mix design formula of ordinary concrete, the strength formula of environment-friendly three-mixed concrete with correction coefficient was given, and the optimum substitution amount of straw powder (rice husk powder) was put forward.