| 摘 要： | F mineral admixture (FMA) is made of the fin-ely divided powder of natural zeolite with a bitof other agent. When FMA is used to displace about10% (by weight) of the ordinary portland cement(OPC) (strength grade 575#) in concrete and mixedwith a suitable amount of super plasticizer (w/c=0.31-0.35), then a high-strength concrete withcompressive strength about 80 MPa and slump about180 MM can be obtained. The strength of thisconcrete is about 10-15% higher than that of thecorresponding concrete mixing with pure OPC, andits bleeding decreases greatly. It makes no segre-gation and separation, and thus it satisfies therequirement of pumping concrete in construction.
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