Decorative free concrete is widely used in urban rail transit engineering,but the research on mix design is limited.Taking the working performance and mechanical properties of concrete as the measurement standard,the study first selects raw materials,water reducing agent and determines the amount of admixture,and then optimizes the concrete foundation mix proportion to obtain the reasonable values of three parameters:sand rate,the amount of fly ash and slag powder.Through the orthogonal test of three factors and three levels,the working performance and compressive strength of concrete are measured,and the optimal mix proportion of non-decorative concrete is obtained.The research results were applied to the column construction of Shenzhen rail transit L12 parking lot,and achieved good results.
NETL
NSTL
万方数据
维普
