摘要
应用正交设计方法,以水料比、硫铝酸盐水泥掺量、硅灰掺量定为3个因素,每个因素设置了3个影响水平,按照正交表共计设计9组配比方案,并经由试验得到不同配比下注浆材料的出机流动度、90 min流动度、12 h抗压强度、1 d抗压强度、28 d抗压强度。采用极差分析,确定各影响因素敏感性,绘制直观分析图反映各因素对注浆材料流动度、抗压强度的影响,分析了各因素对注浆材料性能的影响规律。试验结果表明:当水料比为0.19,硫铝酸盐水泥掺量为13%,硅灰掺量为7%时水泥基注浆材料浆体出机流动度为385 mm,90 min流动度为350 mm,12 h抗压强度为4.8 MPa,1 d抗压强度为23.3 MPa,28 d抗压强度为86.9 MPa,均满足技术要求。
With the orthogonal design method,ratio of water to binder material,sulphoaluminate cement amount and silica fume amount were taken as three factors,and each factor was set at three levels.Nine groups of cement-based grouting materials were designed and tested.The machine fluidity,90 min fluidity,12 h compressive strength,1 d compressive strength and 28 d compressive strength of grouting materials under different mixing ratios were obtained.The sensitivity of each factor was analyzed by the range analysis method.The visual analysis charts of the influence of various factors on the fluidity and compressive strength parameters of grouting materials were made,and the influence law of various factors on the parameters of grouting materials was analyzed.The test results are as follows:when the ratio of water to binder material is 0.19,the sulphoaluminate cement amount is 13%,and the silica fume amount is 7%,the cement-based grouting material has a fluidity of 385 mm,and a 90 min fluidity of 350 mm,the 12 h compressive strength is 4.8 MPa,the 1 d compressive strength is23.3 MPa,the 28 d compressive strength is 86.9 MPa,which all meet the technical requirements of the specification.
作者
李福海
王奕彬
余泳江
王江山
靳贺松
李超
LI Fuhai;WANG Y ibin;YU Yongjiang;WANG Jiangshan;JIN Hesong;LI Chao(School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;The 4th Engineering Co.Ltd.,China Railway Second Engineering Bureau,Chengdu Sichuan 610306,China)
出处
《铁道建筑技术》
2020年第3期10-16,25,共8页
Railway Construction Technology
基金
国家自然科学基金项目(51308471)
四川省重点研发项目(2019YFG0001)
中铁二局第四工程有限公司技术开发合同(2018H0522)。
关键词
隧道工程
衬砌空洞
水泥基注浆材料
正交设计方法
极差分析法
敏感性
材料配比
tunnel engineering
void of lining
cement-based grouting material
orthogonal design method
extremum difference analysis
sensitivity
material ratio