养护温度对环氧树脂混凝土强度影响试验研究

Experimental Study on the Influence of Curing Temperature on Strength of Epoxy Resin Concrete

为研究养护温度对环氧树脂混凝土强度性能的影响,通过测试不同养护温度下环氧树脂混凝土的硬化时间、抗压强度,以及应力-应变曲线,分析低温(5℃)、常温(20℃)、高温(35℃)3种养护条件对材料硬化时间、抗压强度树脂、应力-应变发展规律的影响,并对应力-应变本构关系进行双线性拟合分析。结果表明,随着养护温度升高,环氧树脂混凝土的硬化时间逐渐减小,且材料强度提升。相较于20℃的养护条件,5℃养护的环氧树脂混凝土材料强度降低8.4%,35℃养护的环氧树脂混凝土材料强度提高10.5%;温度升高使得应力-应变曲线上升段应力发展较快,而下降段应力也下降迅速。

The compression test of epoxy resin concrete under different curing temperatures were carried out to study the influence of curing temperature on the strength and performance,the hardening time,compressive strength and stress-strain curves.And the influences of three curing conditions,low temperature(5℃),normal temperature(20℃)and high temperature(35℃),on the hardening time,compressive strength resin and stress-strain development law of materials were analyzed.Then the bilinear fitting analysis of the stress-strain constitutive relation was carried out.The results show that with the increasing of curing temperature,the hardening time of epoxy concrete decreases and the material strength increases gradually.Compared with the curing condition at 20℃,the material strength of the epoxy concrete cured at 5℃and 35℃is reduced by 8.4%and increased by 10.5%,respectively.As the temperature increases,the stress in the ascending section of the stress-strain curve develops rapidly,while the stress in the descending section also decreases rapidly.