摘要
对1.0、1.5、2.0三种激发剂模数和0、10%、20%、30%四种矿渣替代率下的粉煤灰-矿渣基地聚物混凝土在盐冻融循环损伤作用下的力学性能进行了试验研究。结果表明:粉煤灰-矿渣基地聚物混凝土的质量损失率呈先减小后增大的变化特征,当激发剂模数为1.0,抗盐冻整体性能最佳;矿渣对地聚物混凝土的抗盐冻性能有较大幅度提升,随着矿渣替代率增大,粉煤灰-矿渣基地聚物混凝土的质量损失率和吸水率等均呈先减小后增大的变化特征,相对弹性模量和相对抗压强度呈先增大后减小的变化特征,当矿渣替代率为20%时,抗盐冻整体性能最佳;在试验数据基础上,基于Lemaitre等效应变原理,建立冻融损伤模型,该模型可以较好描述不同矿渣替代率下粉煤灰-矿渣基地聚物混凝土随盐冻融循环次数的损伤发展趋势。
The mechanical properties of fly ash slag base polymer concrete with three activator modulus of 1.0,1.5 and 2.0 and four slag replacement rates of 0,10%,20% and 30% under salt freeze-thaw cycle damage were experimentally studied.The results show that the mass loss rate of fly ash slag base polymer concrete decreases first and then increases.When the activator modulus is 1.0,the overall performance of salt freezing resistance is the best;with the increase of slag substitution rate, the mass loss rate and water absorption of fly ash slag base polymer concrete decreased first and then increased, and the relative elastic modulus and relative compressive strength increased first and then decreased.When the slag substitution rate was 20%,the overall salt frost resistance was the best;based on the test data and Lemaitre equivalent strain principle, a freeze-thaw damage model is established.The model can better describe the damage development trend of fly ash slag base polymer concrete with the number of salt freeze-thaw cycles under different slag substitution rates.
作者
丁彩红
DING Caihong(Henan Liujian Construction Development Co.,Ltd.,Luoyang 471000,China)
出处
《粉煤灰综合利用》
CAS
2022年第4期75-80,共6页
Fly Ash Comprehensive Utilization
作者简介
丁彩红(1974-),女,本科,高级工程师,研究方向:建设施工等。
