超细矿物掺合料与高效减水剂的复合减水效应分析

Analysis of the Compound water Reducing Effect of Superfine Mineral Additive and Superplasticizer

通过对超细矿物掺合料硅灰和磨细粉煤灰在单掺、双掺条件下 ,与高效减水剂复合掺入时的复合减水率进行了试验研究 ,分析了超细矿物掺合料与高效减水剂的复合减水效应 ,结果表明 ,超细矿物掺合料与高效减水剂的复合减水效应高于减水剂单掺时的减水效应 ;此外 ,在掺合料掺量相同的条件下 ,用磨细粉煤灰替代部分硅灰 ,再与高效减水剂复合时的复合减水效应高于硅灰与高效减水剂的复合减水效应。

It is experimentally tested for water-reducing rate of cement paste, in which silica fume, ground fly-ash and superplasticizer have been added respectively or combinatively. The rezults show that, when adding together with ultra-fine mineral additive and superplasticizer, the water-reducing effect is higher than that of adding by oneself. When part of silica fume is replaced by ground fly-ash and total weight of all mineral additives is kept in a constant, and a superplasticizer is added concurenfly, then the water-reducing effect is higher than that of adding both silica fume and superplasticizer.