石膏种类对矿渣水泥性能的影响

Impact of gypsum variety on slag cement property

文章研究了三种石膏对矿渣水泥强度和孔结构的影响。根据石膏在纯水、石灰溶液和水泥中的溶解应及水化特性，探讨了用其它石膏替代二水石膏对矿渣水泥的增强机理。结果表明，石膏溶解度的提高可促进早期水化产物的形成和强度的提高，孔隙率的减少和大孔的减少对提高矿渣水泥的耐久性有利，同时也加速了C3S的水化，从而可明显提高矿渣水泥的早期强度，且对后期强度的提高和性能的改善有益。采用该技术可使矿渣掺量提高15％而不改变其性能。

The impact of three kinds of gypsum on the slag cement strength and porosity in studied in this paper.Based on the solubility and hydrobility of the gypsum in pure water, lime solution and cement, the replacement of CaSO4H2O with other kind of gypsum to strengthen the slag cement is also discussed. The result shows that the increase ofgypsum solubility will accelerate the formation of early hydrated product and increase its strength, that the decrease ofporosity rate and big pore will facilitate the durability increase of slag cement and that C3S hydratdri is accelerated sothat the early strength of slay cement is evidently increased; which is favorable for the increase of its late strength andthe improvement of its performane. The technology is able to increase slag additive by 15% wighout changing anyproperty.