硅酸盐通报2024，Vol.43Issue(4)：1436-1444,9.
粉煤灰对渠道用混凝土抗冻及抗冲磨性能的影响
Effect of Fly Ash on Frost and Scour Resistance of Concrete for Channels
摘要
Abstract
Concrete channels in northern Xinjiang are heavily frost-heave and scour and wear,and the cost of concrete used in channels is relatively high.In order to make reasonable use of fly ash resources in Xinjiang and ensure the frost resistance and scour resistance of concrete used in channels,concrete with fly ash content of 0％(mass fraction,the same below),10％,20％and 30％,respectively,was prepared.At the same time,the mechanical properties,freeze-thaw cycle and erosion wear tests were carried out in combination with the ratio used in the production of prefabricated concrete channels.The results show that 3 and 7 d mechanical properties of concrete decrease with the increase of fly ash content,and 28 d mechanical properties of concrete with 10％fly ash content are the best.The frost resistance of concrete increases first and then decreases with the increase of fly ash content.The forst resistance of concrete with 20％fly ash content is the best.Compared with the concrete without fly ash,the frost resistance of concrete with 10％and 20％fly ash content is improved.The impact wear resistance of concrete increases first and then decreases with the increase of fly ash content.The scour resistance of concrete with 10％fly ash content is the best,and the scour resistance of concrete with 10％fly ash content is improved by about 12％compared with that without fly ash.The results show that fly ash can improve the frost resistance and scour resistance of concrete.关键词
粉煤灰/渠道用混凝土/力学性能/冻融循环/抗冻性能/抗冲磨性能/微观结构Key words
fly ash/channel concrete/mechanical property/freeze-thaw cycle/frost resistance/scour resistance/microstructure分类
建筑与水利引用本文复制引用
刘佳敏,马玉薇,李刚..粉煤灰对渠道用混凝土抗冻及抗冲磨性能的影响[J].硅酸盐通报,2024,43(4):1436-1444,9.基金项目
兵团财政科技计划研究项目(2022DB027) （2022DB027）
