摘要
以水性环氧树脂E51为原料、二乙烯三胺(DETA)为固化剂,制备出了水性环氧树脂灌浆材料,研究了DETA用量对灌浆材料凝结时间、黏度、力学强度和渗透性能的影响。结果表明,随着固化剂DETA质量分数的增加,水性环氧树脂灌浆材料的初凝时间逐渐降低,黏度持续增大,粘接强度先增大后减小,热稳定性提高,热失重速率减慢,残炭率提高,渗透时间增多。当DETA质量分数为30%时,灌浆材料的初凝时间最短为8.0 h,对应时刻的黏度最大为80334 mPa·s;当DETA质量分数为25%时,灌浆材料的粘接强度和抗压强度达到了最大值,分别为2.94和59.9 MPa,对应的断裂延伸率为13.82%;在800℃时,DETA质量分数为25%的水性环氧树脂灌浆材料的残炭率为9.3%,渗透时间为1709 s,热稳定性和渗透性能较好。综合分析可知,DETA的最佳质量分数为25%。
A water-based epoxy resin grouting material was prepared using waterborne epoxy resin E51 as the raw material and diethylenetriamine(DETA)as the curing agent.The effects of DETA dosage on the setting time,viscosity,mechanical strength,and permeability of the grouting material were studied.The results showed that with the increased of the mass fraction of curing agent DETA,the initial setting time of water-based epoxy resin grouting material gradually decreased,the viscosity continues to increased,the bonding strength first increased and then decreased,the thermal stability improved,the thermal weight loss rate slowed down,the residual carbon rate increased,and the penetration time increased.When the DETA mass fraction was 30%,the minimum initial setting time of the grouting material was 8.0 h,and the maximum viscosity at the corresponding time was 80334 mPa·s.When the DETA mass fraction was 25%,the adhesive strength and compressive strength of the grouting material reached their maximum values,which were 2.94 and 59.9 MPa,respectively,with corresponding fracture elongation of 13.82%.At 800℃,the residual carbon rate of water-based epoxy resin grouting material with a DETA mass fraction of 25%was 9.3%,and the penetration time was 1709 s.It had good thermal stability and penetration performance.Comprehensive analysis shows that the optimal mass fraction of DETA is 25%.
作者
王臻林
WANG Zhenlin(The 3rd Engineering Co,Ltd.of China Railway Construction Bridge Engineering Bureaugroup,Shenyang 110043,China;School of Civil Engineering,Liaoning Technical University,Fuxin 123009,China)
出处
《功能材料》
CAS
CSCD
北大核心
2024年第5期5066-5071,5100,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(11562013)。
关键词
水性环氧树脂
灌浆材料
固化剂
初凝时间
渗透性能
water-based epoxy resin
grouting materials
curing agent
initial setting time
permeability
