不同掺量粉煤灰对自密实混凝土性能的影响研究
Study on the Influence of Different Fly Ash Content on the Performance of Self-compacting Concrete
张静波 1王锦2
作者信息
- 1. 贵州华宸建设有限公司,贵州 毕节 551700
- 2. 毕节职业技术学院,贵州 毕节 551700
- 折叠
摘要
文中主要就不同掺量粉煤灰对自密实混凝土抗渗性能、力学性能等性能的影响展开试验.结果表明,养护龄期为 7、28 d条件下,混凝土试件抗压强度随粉煤灰掺量增加而降低;90 d龄期下,掺加20%粉煤灰的混凝土试件略高于未掺粉煤灰组的抗压强度,但提升幅度仅有0.8%左右;自密实混凝土中掺入粉煤灰能有效提升其抗渗性能,其中,养护龄期为28、90 d条件下,掺入20%粉煤灰时,混凝土试件吸水率达到最高值,此时,结构抗渗性能为同龄期内各组最佳.
Abstract
In this paper,the effects of different fly ash content on impermeability and mechanical properties of self-compacting concrete are tested.The results show that the compressive strength of concrete specimens at the curing age of 7 days and 28 days decreases with the increase of fly ash content.At the curing age of 90 days,the compressive strength of concrete specimens added with 20%fly ash is slightly higher than that of the group without fly ash,but the increase is only about 0.8%.The addition of fly ash to self-compacting concrete can effectively im-prove its impermeability.When 20%fly ash is added at the curing age of 28 days and 90 days,the water absorption of concrete specimens rea-ches the highest value,and the structural impermeability at this time is the best among all groups in the same age group.
关键词
粉煤灰/自密实混凝土/吸水率/抗渗性能Key words
Fly ash/Self-compacting concrete/Water absorption rate/Impermeability引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据