硅灰对磷酸镁水泥基注浆材料早期力学性能及微观结构的影响  

Effects of silica fume on early mechanical properties and microstructure of magnesium phosphate cement-based grouting materials

作　　者：郭永红 周琛鸿 李绪萍 卢宪路 张传奇 何小芳[3] GUO Yonghong;ZHOU Chenhong;LI Xuping;LU Xianlu;ZHANG Chuanqi;HE Xiaofang(Shenhua Mengxi Coal Chemical Co.Ltd.,Ordos 017000,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;School of Materials Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]国能蒙西煤化工股份有限公司,内蒙古鄂尔多斯017000 [2]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [3]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《新型建筑材料》2024年第1期103-107,113,共6页New Building Materials

基　　金：河南省科技攻关项目(232102321133)。

摘　　要：利用硅灰作为矿物掺合料,研究硅灰对磷酸镁水泥基注浆材料(MPCG)早期力学性能及微观结构的影响。结果表明,MPCG的主要水化产物为K型鸟粪石(KMgPO4·6H2O),掺6%硅灰能减少基体内微裂纹的产生,使MPCG基体更致密,从而提高MPCG的早期抗压强度和耐水性,此时,在空气中养护7 d的抗压强度达到11.7 MPa。This work proposed to use silica fume(SF)as a mineral admixture to study the effects of SF on the early mechanical properties and microstructure of magnesium phosphate cement-based grouting materials(MPCG).The results showed that the main hydration product of MPCG was struvite-K(KMgPO4·6H2O),and the addition of 6%SF could reduce the generation of microcracks in matrix.The compressive strength and water resistance of MPCG were improved by making the MPCG matrix more compact.At this time,the compressive strength at 7 d reached 11.7 MPa after curing in air.

关 键 词：磷酸镁水泥 硅灰 抗压强度 耐水性 

分 类 号：TU528.53[建筑科学—建筑技术科学]