聚合物复合增强冷热循环作用下混凝土抗压强度

关键字：聚合物,复合,增强,冷热循环,作用,混凝土

（同济大学 材料科学与工程学院，先进土木工程材料教育部重点实验室，上海  201804）

 
    摘要：采用EVA和聚丙烯纤维共同增强5~85 ℃高低温冷热循环作用下混凝土的抗压强度，研究了EVA和聚丙烯纤维单掺以及二者复掺对冷热循环下混凝土抗压强度的改善效果。结果表明：单掺EVA对改善冷热循环作用下混凝土的抗压强度无明显效果；单掺纤维能一定程度上降低抗压强度损失率；复掺EVA和纤维的改善效果最好，且在冷热循环作用后期表现更突出。
    关键词：混凝土；冷热循环；抗压强度；改善措施
    中图分类号：TU528.41        文献标识码：A        文章编号：1001-702X（2017）11-0032-03
 

Study on the compressive strength of concrete by EVA and PP fiber under cool/thermal cycling
LIU Sifeng，ZHU Dongming，WAN Tingting
（School of Materials Science and Engineering，Key Laboratory of Advanced Civil Engineering Materials of Education，
Tongji University，Shanghai 201804，China）

    Abstract：The compressive strength of concrete under 5~85 ℃ cool/thermal cycling was improved by EVA，polypropylene fiber，and both of them. The improvement effects of adding EVA or polypropylene fiber only and adding the mixture of EVA and fiber were discussed also. The experimental results showed that，only adding EVA had no obvious improvement effect on the compressive strength under the cool/thermal cycling；only adding fiber could reduce the loss rate of compressive strength to a certain degree；the improvement effect of adding the mixture of EVA and fiber was the best，especially in the later period of cool/thermal cycles.
    Key words：concrete，cool/thermal cycling，compressive strength，improvement measures