水灰比对过硫磷石膏矿渣水泥强度的影响  

Influences of Water-cement Ratio on the Strength of Excessive-sulfate Phosphogypsum Slag Cement

作　　者：龙安[1] 黄赟[1] 林宗寿[1] 唐有运 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [2]湖北省黄麦岭磷化工有限公司,大悟432800

出　　处：《建材世界》2015年第3期1-5,共5页The World of Building Materials

基　　金：国家高技术研究发展计划(863)项目(2012AA06A112)

摘　　要：探究不同的水灰比对过硫磷石膏矿渣水泥(磷石膏基水泥)强度的影响,并通过XRD、SEM、DSC对不同水灰比过硫磷石膏矿渣水泥的水化产物、水化过程和机理进行了分析,结果表明:与普通硅酸盐水泥不同,过硫磷石膏矿渣水泥的强度在水灰比0.36时强度最高,继续降低水灰比,水泥强度反而下降。这是由于矿渣是在碱性的液相中溶解和形成水化产物,如果水灰比太低,水在早期形成水化产物而消耗完毕,阻碍了矿渣的后期水化,水化产物减少,从而使强度降低。The influences of water-cement ratio（w/c） on the strength of excessive-sulfate phosphogypsum slag ce- ment （PSC） were studied by different w/c mortars experiments and compared with the ordinary portland cement （OPC）. The hydration products, hydration process, and microstructure development of PSC paste with different w/c were also discussed by XRD.SEM and DSC analyses. The results show that different from OPC, PSC reaches its high- est strength when w/c is 0. 36. But after that, with its w/c decreases, the strength oi PSC decreases significantly. During PSC hydration process, slag must be dissolved in alkali solution before it can form hydration products, if w/c is lower than 0. 36, all the water will be consumed at early hydration stage, its hydration process in late age will be ham- pered and hydration products decrease. As a result, strength development is affected.

关 键 词：磷石膏 过硫磷石膏矿渣水泥 矿渣水化 

分 类 号：TQ172.4[化学工程—水泥工业]