Optimization Design Of Mix Proportion Of High Performance Concrete With Double Mixing Technology

High performance concrete is a kind of good comprehensive performance of concrete,its remarkable characteristic is with good fluidity,strength and durability etc.In this study,the compound active admixture(I grade fly ash and granulated blast furnace slag powder S95)and high performance water reducing agent.It can not only optimize the working performance,strength and durability of concrete,but also can produce a certain economic effectThrough the combination of both experience and experimental methods,to study the different water-binder ratio(0.33,0.34,0.35)and the mixing different proportion to fly ash and granulated blast furnace slag of liquidity,7d、28 d compression strength after hardening and resistance to chloride ion penetration durable performance impact of the high performance concrete.Through the experimental results and analysis,we can draw the following conclusion:1、For this on the use of the double mixing technology of high performance concrete mix ratio design,by considering the comprehensive performance of high performance concrete,give suggestions of laboratory of high performance concrete mix into water:cement,fly ash,grain of flower blast furnace slag,sand,stone,high performance water reducing agent = 1:1.7647:0.5883:0.5883:4.5578:6.8367:0.0294.It is suggested that the water binder ratio of high performance concrete is 0.34,The active admixture of concrete is 40%,the fly ash and granulated blast furnace slag powder are commensurable.2、Water to binder ratio of high performance concrete mixture flow,hardened 7d compressive strength and 28d compressive strength and chloride ion permeability durability has important influence.In addition,the change of the mixed fly ash and granulated blast furnace slag powder will not change the trend.3、For fly ash and granulated blast furnace slag powder mixed situation,the liquidity of high-performance concrete is between single mixed with 40%fly ash and mixing 40%granulated blast furnace slag powder,for the electric flux of fly ash and ground granulated blast furnace slag,the value is not between single mixed with 40%fly ash and mixing 40%granulated blast furnace slag powder flux value,but is smaller than two.4、The ratio of fly ash and granulated blast furnace slag powder to 1:1 is better than that of 1:3.