活化煤矸石对减水剂塑化效果的影响

Effect of Activated Gangue on Plasticizing Efficiency of Plasticizers

摘要:

试验研究了经活化处理并磨细的煤矸石(AG)以不同比例等量替代部分水泥后，对掺减水剂水泥净浆流动度的影响规律，并将AG与常用的活性矿物掺合料矿渣粉(Slag)、高钙粉煤灰(HCFA)进行比较.结果表明，所选用的三种品牌硅酸盐系列水泥和三类减水剂，用AG等量替代部分水泥均会对减水剂的塑化效果产生负面影响;与此相反，Slag和HCFA有助于改善减水剂的塑化效果.初步分析了AG,Slag和HCFA等矿物掺合料对减水剂塑化效果的影响机理.

Abstract:

The effect of activated ground gangue(AG), while equally replacing cement with different proportions, on fluidity of cement pastes added with plasticizers was investigated by experiments. The effect of AG on plasticizing efficiency of plasiticizers was also compared with that of other mineral admixtures, i.e. slag powder(Slag) and high calcium fly ash(HCFA). The results show that as for 3brand Portland cements and 3type plasticizers used in the experiment,replacing partial cement with AG reduces the plasticizing efficiency of plasticizers;however, replacing partial cement with Slag or HCFA can increase the plasticizing efficiency of plasticizers.Finally,the paper presents an analysis of the acting mechanism of AG, Slag and HCFA on plasticizing efficiency of plasticizers.