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The main objective of this study is to research the workability
and compressive strength of High-performance concrete under
different water-cement ratio and various propotion of pozzolan
materials（fly ash and slag）replacing cement 550kg/m3 as 100kg/
m3 , 200kg/m3, 300kg/m3 and partial amounts of sand , and to get
the optimum replacement for economic benefit . The propotion of
pozzolan materials is divided into five categories , such as
100％ , 80％ , 50％ , 20％ and 0％ . An adequate dosages of a
superplasThe results indicated that the workability and strength
of that cement replacing by slag is better than by fly ash . For
strength requirement , it can be satisfied our need for using
slag 100% replacing cement . For considering the economic
requirement , we can choose the groups containing more volume of
fly ash . If we don*t need the hyperhigh strength , it is to our
requirement for using cement with 250kg/m3 . So , using pozzolan
matrials to replace cement is an available method .
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