diff H
1.The cement with different specific surface area were prepared in dif ferent grinding device by adding variable gypsum into the same kind of clinker, then the cement was grinded to prepare the same class pumped concrete under diff erent temperature. The slump and extension of concrete of initial, 1h, 2h and it s compressive strength of 3d, 7d , 28d were determined, so the effect of cement admixed with different gypsum on performance of concrete was discussed based on above.
