高强度环氧树脂砂浆的制备与灌注工艺研究  

Preparation and grouting process of high-strength epoxy resin mortar

作　　者：李毅 孔亚宁 程宝军 杨文 高育欣 LI Yi;KONG Ya-ning;CHEN Bao-jun;YANG Wen;GAO Yu-xin(China West Construction Academy of Building Materials CO.,Ltd.,Chengdu 610020,China)

机构地区：[1]中建西部建设建材科学研究院有限公司,四川成都610200

出　　处：《热固性树脂》2024年第3期1-6,共6页Thermosetting Resin

基　　金：中国建筑土木工程材料重点实验室(绿色生态结构材料)平台课题(No.ZJXJ-PT-2022-02)。

摘　　要：采用自制固化剂制备了高强度环氧树脂砂浆,研究分析了其流动性、力学性能、固化行为以及钢纤维的增强效应,并针对封闭灌浆场景进行了模拟试验。结果表明:当胶骨比大于0.25时,环氧树脂砂浆展现出良好的流动性,初始流动度超过230 mm,30 min后流动度依然维持在200 mm以上。与普通水泥砂浆相比,环氧树脂砂浆的抗压强度、抗折强度、抗拉强度和粘接强度更好,分别可达131.6、48.2、17.3和6.8 MPa。钢纤维的添加进一步提升了环氧树脂砂浆的力学性能,且赋予砂浆“裂而不断”特性,2%体积掺量的钢纤维可使砂浆抗拉强度提升30%,二次抗折强度可达20 MPa。环氧树脂砂浆可灌性良好,封闭灌浆施工中保压注浆可以有效提升灌浆的密实性。The high-strength epoxy resin mortar prepared using a self-developed curing agent.Its flowability,mechanical properties,curing behavior and the reinforcing effect of steel fibers were investigated and the simulation tests were conducted to replicate closed grouting scenarios.The results indicated that when the resin-to-aggregate ratio in the mortar exceeded 0.25,the epoxy resin mortar exhibited good flowability,with an initial flowability exceeding 230 mm,and the flowability at 30 minutes remained above 200 mm.In comparison to ordinary cement mortar,the compressive strength,flexural strength,tensile strength and adhesive strength of epoxy resin mortar were better,reaching 131.6,48.2,17.3,and 6.8 MPa,respectively.The addition of steel fibers further enhanced the mechanical properties of the epoxy resin mortar,providing a“crack-bridging”effect.With a 2%volume fraction of steel fibers,the mortar exhibited a 30%increase in tensile strength and achieveed a secondary flexural strength of 20 MPa.The epoxy resin mortar demonstrated good workability for grouting applications.In closed grouting construction,the use of pressurized grouting effectively improved the compactness of the grout.

关 键 词：环氧树脂砂浆 高强度 抗压强度 抗折强度 抗拉强度 粘接强度 灌注工艺 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]