石屑湿喷混凝土的制备与性能研究  

Preparation and Performance of Stone Chips Wet Shotcrete

作　　者：赵立 孙江涛 吴定略 李志堂 何涛 关业程 沈卫国[1,2] ZHAO Li;SUN Jiangtao;WU Dinglue;LI Zhitang;HE Tao;GUAN Yecheng;SHEN Weiguo(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China;Poly Changda Engineering Company Limited,Guangzhou 545000,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070 [3]保利长大工程有限公司,广州545000

出　　处：《硅酸盐通报》2023年第3期1016-1024,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51972247)。

摘　　要：针对石屑利用率低的问题,制备了石屑湿喷混凝土,研究了石屑取代量(石屑对机制砂的取代量)、砂率及粉煤灰掺量对湿喷混凝土工作性能、抗氯离子渗透性能、抗硫酸盐侵蚀性能及孔结构的影响。结果表明,适当的石屑取代量可以改善混凝土力学性能和耐久性能,但石屑的取代量越大混凝土的工作性能下降越明显。与机制砂喷射混凝土相比,石屑湿喷混凝土具有良好的力学性能。在此基础上,适当的砂率和粉煤灰掺入量可以进一步提高石屑湿喷混凝土的工作性能和耐久性能,当喷射混凝土砂率为55%、粉煤灰掺量为20%(质量分数)时,石屑湿喷混凝土的综合性能达到最佳,对石屑应用于湿喷混凝土具有参考意义。Aimed at the problem of low utilization rate of stone chips,stone chips wet shotcrete was prepared.The effects of replacement amount of stone chips(replacement of manufactured sand by stone chips),sand ratio and fly ash content on the workability,chloride penetration resistance,sulfate corrosion resistance and pore structure of wet shotcrete were studied.The results show that the mechanical properties and durability of concrete can be improved by the appropriate replacement amount of stone chips,but the greater the replacement amount of stone chips is,the more obvious the decline in the workability of concrete is.Compared with manufactured sand shotcrete,stone chips wet shotcrete has good mechanical properties.On this basis,the proper sand ratio and fly ash content can further improve the workability and durability of stone chips wet shotcrete.When the sand ratio of shotcrete is 55%and the fly ash content is 20%(mass fraction),the comprehensive performance of stone chips wet shotcrete reaches the best,which has reference significance for the application of stone chips in wet shotcrete.

关 键 词：湿喷混凝土 石屑 工作性能 抗氯离子渗透性能 抗硫酸盐侵蚀性能 孔结构 

分 类 号：TU521.1[建筑科学—建筑技术科学]