硅酸盐水泥熟料细度对磷建筑石膏水化行为和强度的影响研究  

Study on fineness of Portland cement clinker on hydration behavior and strength of calcined gypsum from phosphogypsum

作　　者：周祥 杜浪 李凤英 周双福 邵瞾 张晓敏 彭菁 ZHOU Xiang;DU Lang;LI Fengying;ZHOU Shuangfu;SHAO Zhao;ZHANG Xiaomin;PENG Jing(Chengdu Institute of Products Quality Inspection Co.Ltd.,National Center for Building Material Quality Test and Inspection(Sichuan),Chengdu 610100,China;Sichuan Institute of Product Quality Supervision and Inspection,Chengdu 610100,China)

机构地区：[1]成都产品质量检验研究院有限责任公司,国家建材产品质量检验检测中心(四川),四川成都610100 [2]四川省产品质量监督检验检测院,四川成都610100

出　　处：《新型建筑材料》2022年第8期129-132,共4页New Building Materials

基　　金：2019年度四川省市场监管系统科技计划项目(川市监函[2019]341号)。

摘　　要：为实现磷石膏的高质化利用,采用等温微量热仪、X射线衍射仪及全自动压汞仪研究了硅酸盐水泥熟料细度对磷建筑石膏水化行为的影响,并对其绝干强度进行了评价。结果表明,水泥熟料的掺入显著提高了磷石膏浆体的水化放热速率和放热量,且随着熟料细度的增大,水化放热速率和放热量提高;掺入细度为310、450 m^(2)/kg熟料的磷建筑石膏试样钙矾石和Ca(OH)_(2)衍射峰强度更高,生成的C-S-H、钙矾石等水化产物的填充作用降低了磷石膏的孔隙率,且随着熟料细度的增大,总孔隙率呈先减小后增大的趋势;掺入细度为310 m^(2)/kg熟料的磷建筑石膏硬化体28 d绝干强度最高,抗压和抗折强度相比于纯磷石膏提高了125.2%、117.2%。To achieve the high quality utilization of calcined gypsum from phosphogypsum,the effect of fineness of clinker on hydration behavior of calcined gypsum from phosphogypsum was investigated by X-ray diffraction,mercury intrusion porosimeter and isothermal calorimeter.And the absolute dry strength was also evaluated.It is showed that the rate of heat evolution and cumula-tive heat of calcined gypsum from phosphogypsum slurry increase with the increase of fineness clinker powder.The intensity peaks of ettringite and Ca(OH)_(2)are higher with clinker with fineness of 310 m^(2)/kg and 450 m^(2)/kg.The porosity of hydrated calcined gyp-sum from phosphogypsum is reduced because of its filling effect of C-S-H gel and ettringite,and while with the increase of fine-ness of clinker,the porosity of samples first decrease and then increase slightly.The dry strength is the highest with addition of clinker with fineness of 310 m^(2)/kg of hydrated calcined gypsum from phosphogypsum for 28 days curing,the increase rate of com-pressive and flexural strength are 125.2%and 117.2%compared to pure calcined gypsum from phosphogypsum.

关 键 词：硅酸盐水泥熟料 细度 磷建筑石膏 水化行为 强度 

分 类 号：TU526[建筑科学—建筑技术科学]