关键词: 混料设计;高性能混凝土;配合比优化;坍落度;抗压强度

Abstract: In order to design the mix of high performance concrete more scientifically and rationally,the effect of each component in the high performance concrete was studied. Cement,ground granulated blast furnace slag(GGBS)and fly ash were regarded as a set of mix,fine aggregate and coarse aggregate were regarded as another set of mix. The mixing effect of mineral admixture,cement and sand ratio was analyzed by combined design,the regression equation of the slump and compressive strength was obtained,which can achieve the optimization of mix. The results show to get good workability and strength of high performance concrete,the content of mineral admixture and sand ratio should not be too high. The concrete early strength is greatly improved by GGBS than fly ash,in the later period,the strength of high performance concrete is effected by cement and GGBS. The increase of sand ratio has little effect on the strength of high performance concrete but has great effect on slump. The increase of fly ash and GGBS content both increase the slump of high performance concrete. The research results can provide reference for the selection of mineral admixtures,sand ratio and the mix design of high performance concrete.

Key words: mix design;high performance concrete;optimization of mix;slump;compressive strength