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

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 (2016) 粉煤灰掺量对自密实混凝土收缩性能影响的试验研究。 交通技术, 5, 1-6. doi: 10.12677/OJTT.2016.51001

参考文献

[1] 刘运华, 谢友均, 龙广成, 等. 自密实混凝土研究进展[J]. 硅酸盐学报, 2007, 35(5): 671-678.

[2] 张后禅. 机制砂自密实混凝土配制方法及应用技术研究[D]: [硕士学位论文]. 杭州: 浙江大学, 2012.

[3] 鸿根, 潘钢华. 掺粉煤灰高性能桥用混凝土变形性能研究[J]. 东南大学学报: 自然科学版, 2002, 32(5): 779-782.

[4] 安明哲, 朱金铨, 贾维祖. 高性能混凝土的自收缩问题[J]. 建筑材料学报, 2001, 4(2): 160-166.

[5] 李悦. 自密实混凝土技术与工程应用[M]. 北京: 中国电力出版社, 2013.

[6] 冯乃谦. 实用混凝土大全[M]. 北京: 科学出版社, 2001.

分享
Top