(2157)--不同材料组成及温度对水工混凝土抗压强度影响试验研究.pdf

不同材料组成及温度对水工混凝土抗压强度影响试验研究 * Experimental Study on the Influence of Different Material Composition and Temperature on the Compressive Strength of Hydraulic Concrete 　　摘　要 ： 本文主要研究不同水胶比、不同粉煤灰掺量及不同温度条件的养护过程对水工混凝土强度的影响。制作 不同水胶比、不同粉煤灰掺量的标准混凝土试件，利用人工环境模拟室模拟不同温度条件对其养护，对各试件进行室 内抗压强度试验。试验结果表明 ：掺加粉煤灰会影响混凝土 28d 抗压强度，影响程度将随掺量变化而变化 ；其次，水 胶比对抗压强度也有较大影响，二者关系符合 Abrams’水胶比准则 ；另外，温度对混凝土抗压强度有着不可忽视作用， 即使温度变化幅度相同，但作用龄期时间节点不同，强度仍有差异。同时综合对比发现，各因素对混凝土强度的影响 强弱不同。因此，实际应用中应首先对主要影响参数合理设计，其他影响条件则根据混凝土的功能要求而设计。 　　关键词 ：抗压强度 ；水胶比 ；粉煤灰 ；养护条件 ；人工模拟 　　中图分类号 ： TU528.7　　　　文献标识码 ：A　　　　文章编号 ：1005-8249（2020）03-0037-04 1 2 3 ZHANG Ou , WU Liqiang , LI Xiaona 1. Yangling Vocational and Technical College, Yangling 712100, China; 2. Zhejiang Water Resources and Estuary （ Research Institute, Hangzhou 310020, China; 3. Xian University of Technology, Xian 710048, China） 　　Abstract: This paper mainly studies the effect of the influence of different water-binder ratio, different fly ash content and different temperature conditions on the strength of hydraulic concrete during curing process. Standard concrete samples were prepared with different water- binder ratios and different amounts of fly ash, and artificial environment simulation chambers were used to simulate the conserve of different temperature conditions. Indoor samples were tested for compressive strength. The test results show that the addition of fly ash will affect the 28-day compressive strength of concrete, and the influence degree will change with the change of dosage. Secondly, the ratio of adhesive to compressive strength also has a great influence, the relationship conforms to Abrams water-binder ratio criterion. In addition, the temperature has a non- negligible