摘要
为改善传统水泥基注浆材料强度低、稳定性差、能耗高等缺点,制备了水性环氧树脂(WER)改性水泥基注浆浆液。通过室内试验,探讨了水灰比和WER掺量对水泥浆液流变性能和物理力学性能的影响规律,以确定WER最佳掺量。研究结果表明:WER对浆液泌水率的降低作用在高水灰比和高掺量下更为显著。改性浆液流动度随WER掺量的增加先增大后减小,最高可达352 mm。其流变曲线符合修正的Bingham模型。浆液结石体单轴抗压强度呈先增大后减小的趋势,当水灰比为0.6、0.8和1.0,WER掺量为5%时,单轴抗压强度最大,分别为23.9 MPa、18.9 MPa和15.1 MPa,比对照组增长了79.6%、104.6%和148.1%。WER有利于提升水泥基材料的刚度和韧性。WER掺量在5%以内,该注浆材料表现出优异的流变性能和物理力学性能,具有广阔的应用前景。
To perfect the flaws of traditional cement-based grouting materials,such as low strength,poor stability,and high energy consumption,waterborne epoxy resin(WER)modified cement-based grouting material was prepared.The influence of water-cement ratio and WER content on the rheological and physico-mechanical properties of cement grout were investigated through indoor tests to determine the optimal content of WER.The results of the study showed that the reduction effect of WER on grout bleeding rate was more significant at a high water-cement ratio and high content.The fluidity of modified grout first increased and then decreased with the increase of WER content,reaching a maximum of 352 mm.Its rheological profile conformed to the modified Bingham model.The uniaxial compressive strength of the grout-solidified stone body tended first to increase and then decrease.The uniaxial compressive strength was maximum at water-cement ratios of 0.6,0.8 and 1.0 and WER content of 5%,which were 23.9 MPa,18.9 MPa and 15.1 MPa,respectively,representing an increase of 79.6%,104.6%and 148.1%over the control group.WER was beneficial in improving the stiffness and toughness of cement-based materials.This grouting material shows excellent rheological and physical-mechanical properties when WER content is within 5%,and has a broad application prospect.
作者
张嘉凡
余泽洋
覃祥瑞
张慧梅
ZHANG Jiafan;YU Zeyang;QIN Xiangrui;ZHANG Huimei(Department of Mechanics,Xi’an University of Science and Technology,Xi’an 710054,China;School of Architecture and Civil Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《功能材料》
北大核心
2025年第8期8212-8218,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(12172280,12472406)
陕西省自然科学基金重点项目(2020JZ-53)。
关键词
注浆材料
水性环氧树脂
流变性能
力学性能
grouting material
waterborne epoxy resin
rheological property
mechanical property
作者简介
张嘉凡(1967—),男,教授,博士,主要从注浆材料方面的研究工作。;通讯作者:余泽洋,E-mail:13259916931@163.com。
