花岗岩石粉对水泥浆体力学性能的影响  

Effect of Granite Powder on Mechanical Properties of Cement Slurry

作　　者：张晓静 王德志[1,2,3,4] 靳凯戎[1] 刘江 关岩 ZHANG Xiaojing;WANG Dezhi;JIN Kairong;LIU Jiang;GUAN Yan(School of Civil&Water Conservancy Engineering,Ningxia University,Yinchuan 750021,China;Water Resources Engineering Research Center in Modern Agriculture in Arid Regions,Yinchuan 750021,China;Ningxia Center for Research on Earthquake Protection and Disaster Mitigation in Civil Engineering,Yinchuan 750021,China;Engineering Technology Research Center of Water-Saving and Water Resource Regulation in Ningxia,Yinchuan 750021,China;College of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]宁夏大学土木与水利工程学院,银川750021 [2]旱区现代农业水资源高效利用教育部工程研究中心,银川750021 [3]宁夏土木工程防震减灾工程技术研究中心,银川750021 [4]宁夏节水灌溉与水资源调控工程技术研究中心,银川750021 [5]辽宁科技大学材料与冶金学院,鞍山114051

出　　处：《硅酸盐通报》2023年第5期1704-1709,共6页Bulletin of the Chinese Ceramic Society

基　　金：宁夏重点研发计划(2022BFE03001);国家自然科学基金(51968060);宁夏青年拔尖人才培养工程(2080116);宁夏一流学科项目(NXYLXK2021A03)。

摘　　要：以花岗岩石粉(GP)为矿物掺合料,通过X射线衍射仪、扫描电镜、综合热分析仪研究了GP对水泥浆体力学性能、物相组成、微观形貌的影响。结果表明:在标准养护条件下,掺加15%(质量分数,下同)GP的水泥浆体28 d抗压强度最高,为37.0 MPa;与未掺加GP的水泥浆体相比,掺加10%GP的水泥浆体56 d线收缩下降了18.3%,掺加20%GP的水泥浆体初凝时间和终凝时间分别缩短了20.7%、18.2%。在水养条件下,掺加20%GP的水泥浆体28 d抗折强度较标准养护条件下提高了48%。GP通过火山灰效应参与水泥浆体水化过程,形成更多的水化硅酸钙(C-S-H),掺加GP可以促进水泥浆体形成Ⅰ型C-S-H,有利于提高水泥浆体力学性能,缩短凝结时间。The influence on mechanical properties,phase composition,microstructure of cement slurry with granite powder(GP)as a mineral material was conducted by using X-ray diffractometer(XRD),scanning electron microscope(SEM),synchronous thermal analyzer(TG-DSC).The results show that under standard curing condition,the compressive strength of cement slurry containing 15%(mass fraction,the same below)GP curing for 28 d reaches 37.0 MPa,which is highest value.The linear shrinkage of cement slurry with 10%GP curing for 56 d decreases by 18.3%than that of cement slurry without adding GP.The initial setting time and final setting time of cement slurry containing 20%GP are shortened by 20.7%,18.2%,respectively.The flexural strength of cement slurry with 20%GP curing in water for 28 d is 48%higher than that under standard curing.GP participates in the hydration process of cement slurry through pozzolanic effect to form more hydrated calcium silicate(C-S-H).Adding GP can promote the formation of type I C-S-H in cement slurry,which is beneficial to improve the mechanical properties and shorten the setting time of cement slurry.

关 键 词：花岗岩石粉 力学性能 水化产物 微观结构 凝结时间 线收缩 

分 类 号：TU528[建筑科学—建筑技术科学]