粉煤灰及硅灰对再生粗骨料混凝土抗冲磨性能的影响研究
Study on Influence of Fly Ash and Silica Fume on Impact Resistance of Recycled Coarse Aggregate Concrete
陈勇1
作者信息
- 1. 中铁十一局集团第一工程有限公司,湖北 襄阳 441000
- 折叠
摘要
为探究再生混凝土采用不同再生粗骨料取代率时的抗冲磨性能差异,文中就粉煤灰及硅灰对再生粗骨料混凝土抗冲磨性能的影响进行研究.结果表明,随着再生骨料取代率提高,混凝土抗冲磨性能逐渐降低;硅灰的掺入有助于强化混凝土抗冲磨性能,而粉煤灰的掺入会对其产生不利影响;复掺粉煤灰和硅灰条件下,两者比例不同则混凝土抗冲磨性能所受影响也有不同,其中,掺加5%硅灰和15%粉煤灰时,再生混凝土具有良好抗冲磨性能且高于基准混凝土.
Abstract
In order to investigate the impact of recycled concrete with different regenerated coarse aggregate substitution rates,the effects of fly ash and silica fume on the impact of recycled coarse aggregate concrete were studied.The experimental results show that the impact resistance of concrete gradually decreases during the process of increasing the replacement rate of recycled aggregate.The addition of silica fume is condu-cive to enhancing the impact resistance of concrete,while the addition of fly ash will have an adverse effect on it.Under the condition of mixed fly ash and silica fume,the impact on the impact resistance of concrete is also different.When 5%silica fume and 15%fly ash are selected,the recycled concrete has good abrasion resistance,which is higher than the reference concrete.
关键词
硅灰/粉煤灰/再生混凝土/粗骨料/抗冲磨性能Key words
Silica fume/Fly ash/Recycled concrete/Coarse aggregate/Abrasion resistance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