CAJ | 학술논문

对减水剂对干混砂浆中粉状组成的分散性进行了对比试验研究，采用微坍落度筒测定了四种粉状组成（水泥、矿渣粉、粉煤灰和石灰石粉）的净浆流动度分别随4种减水剂（聚羧酸系、萘系、氨基系和脂肪族系）掺量增加的变化规律。试验结果表明：对于水泥、矿渣粉和粉煤灰，聚羧酸系减水剂是分散效果最好的减水剂；对于石灰石粉，脂肪族减水剂是分散效果最好的减水剂。由于脂肪族减水剂的单价约为聚羧酸系减水剂单价的1/4，结论是脂肪族减水剂将是制备干混砂浆的性价比最高的减水剂。
대감수제대간혼사장중분상조성적분산성진행료대비시험연구，채용미담락도통측정료사충분상조성（수니、광사분、분매회화석회석분）적정장류동도분별수4충감수제（취최산계、내계、안기계화지방족계）참량증가적변화규률。시험결과표명：대우수니、광사분화분매회，취최산계감수제시분산효과최호적감수제；대우석회석분，지방족감수제시분산효과최호적감수제。유우지방족감수제적단개약위취최산계감수제단개적1/4，결론시지방족감수제장시제비간혼사장적성개비최고적감수제。
Comparative experimental study on the dispersibility of water-reducing agents on powdered compositions in dry mixed mor-tar was carried on.Four types of powdered compositions (i.e.cement,slag powder,fly-ash and limestone powder) and four types of wa-ter-reducing agents (i.e.polycarboxylate,naphthalene formaldehyde,sulfamate and aliphatic water reducer ) were selected in this experi-mental study.The relationships between the paste fluidity of powdered composition and the content of water-reducing agent were measured by flow test.The results showed that the dispersion effect of polycarboxylate water reducer was best when the paste of cement or slag pow-der or fly-ash was dispersed by adding water-reducing agent ,and the dispersion effect of aliphatic water-reducer agent was best when the paste of limestone powder was dispersed by adding water-reducing agent ,and the unit price of aliphatic water-reducer agent is about quar-ter of the unit price of polycarboxylate water reducer.This is a conclusion that aliphatic water-reducer will be water-reducing agent with maximum ratio of performance and price in producing dry mixed mortar.