【摘要】 首先推导出双组分连续粒径粉体在浆体中的堆积密度公式;通过测定多组粒径分布不同的复合水泥在流动度相同的情况下的需水量,得到不同粒径分布对应着的不同堆积密度。所采用的15种试样的需水量相差4%~10%。用该公式计算上述不同粒径分布的复合水泥浆体的堆积密度及需水量与试验值基本吻合。对公式的适用性进行了验证,说明该公式可以用来模拟诸如水泥和磨细矿粉体系、水泥和粉煤灰体系等胶凝材料细颗粒的堆积密度。更多还原

【Abstract】 Different size distributions determine different packing densities.A formula of packing density with continuous grain size distribution for cement pastes was developed.Based on measuring the water requirements of the cement-slag powder system with different size distributions in the same fluidity degree,the packing density of the different size distributions of the slag and their water requirements were calculated by the formula,and the results agree well with the testing ones.The difference among the water demands of 15 samples used in the experiment is 4% to 10%.In addition,the validity of the method was verified through experiment.The formula could simulate the packing density of the blend materials such as cement,fine-slag,and fly ashes.更多还原