桥梁桩基废弃泥浆制作地聚物胶凝材料试验研究

Experimental Study on the Production of Geopolymer Cementitious Materials Using Abandoned Mud from Bridge Pile Foundations

为处理桥梁桩基废弃泥浆,采用工业固废协同泥浆制作地质聚合物胶凝材料,改良其工程性能。基于正交试验设计原理,参考水泥胶砂试验方法研究了泥浆掺量、水固比、养护龄期对地聚物胶凝材料强度的影响。试验结果表明:掺加泥浆的地聚物胶凝材料28 d抗压强度可达21.65 MPa,抗折强度可达4.11 MPa。在泥浆掺量为30%~50%、水固比为0.35~0.55及养护龄期28 d范围内,地聚物胶凝材料的抗压、抗折强度与泥浆掺量、水固比呈负相关,与养护龄期呈正相关。

In order to treat abandoned mud from bridge pile foundations,industrial solid waste synergistic mud was used to produce geopolymer cementitious materials and improve their engineering performance.Based on the principle of orthogonal experimental design and referring to the cement sand test method,the influence of mud content,water solid ratio,and curing age on the strength of geopolymer cementitious materials was studied.The experimental results show that the 28 day compressive strength and flexural strength of the geopolymer cementitious material mixed with mud can reach 21.65 MPa and 4.11 MPa,respectively.Within the range of mud content of 30%~50%,water solid ratio of 0.35~0.55,and curing age of 28 days,the compressive and flexural strength of geopolymer cementitious materials are negatively correlated with mud content and water solid ratio,and positively correlated with curing age.