交通技术  >> Vol. 5 No. 1 (January 2016)

粉煤灰掺量对自密实混凝土收缩性能影响的试验研究
Experimental Investigation on the Effect of Fly Ash Content to the Shrinkage of Self-Compacting Concrete

DOI: 10.12677/OJTT.2016.51001, PDF, HTML, XML, 下载: 1,685  浏览: 4,554  科研立项经费支持

作者: 黄知元:广东长宏公路工程有限公司,广东 广州;彭可可*:佛山科学技术学院环境与土木建筑学院,广东 佛山

关键词: 粉煤灰机制砂自密实混凝土收缩性能试验研究Fly Ash Mechanism Sand Self-Compacting Concrete Shrinkage Experimental Investigation

摘要: 采用机制砂配制自密实混凝土,通过试验研究分析粉煤灰掺量对自密实混凝土收缩性能的影响。通过固定水胶比等配合比参数,以粉煤灰掺量为变量,分别实验测试得到了掺0%、20%和43%三个水平的粉煤灰条件下机制砂自密实混凝土的干燥收缩、自收缩及温度收缩的变化规律。试验结果表明:掺加粉煤灰可减少机制砂自密实混凝土的收缩,且掺量低于20%时其对机制砂自密实混凝土的自收缩与干燥收缩的控制效果有限,而当粉煤灰掺量增加到40%左右时,其对机制砂自密实混凝土收缩的抑制作用显著。
Abstract: The mechanism sand is used to make up self-compacting concrete, and the effect of fly ash content to the shrinkage of self-compacting concrete is researched by laboratory experiments. Water to binder ratio is fixed, and the fly ash content is variable at three levels, which are 0%, 20%, 40%. The change regulation of dry-shrinkage, self-shrinkage, temperature-shrinkage with the above three levels is obtained. The result shows that the fly ash can eliminate the shrinkage of self- compacting concrete. The elimination effect is limited when the fly ash content is 20%, and when the content of fly ash reaches to 40%, the elimination effect is significant.

文章引用: 黄知元, 彭可可. 粉煤灰掺量对自密实混凝土收缩性能影响的试验研究[J]. 交通技术, 2016, 5(1): 1-6. http://dx.doi.org/10.12677/OJTT.2016.51001