摘要
通过控制粉煤灰掺量,以密度、坍落度、立方体抗压强度、回弹值、轴心抗压强度及弹性模量等参数作比对,对高性能混凝土的力学性能展开了研究与分析,试验结果表明,粉煤灰掺量在15%~20%之间时,其活性效应最显著;从28~90 d范围内,随着龄期增长,二次反应所生成的凝胶物质相应增多,微颗粒填充到混凝土孔隙中,形成致密结构,混凝土各项性能得到明显的改善。
Through the control,the dosage of fly ash in bulk density,the slump,cube compressive strength,rebound value,axial compressive strength and elastic modulus of parameters,such as,the mechanical properties of the high performance concrete is carried out research and analysis,the test results show that the fly ash content is between 15%~20%,its active effect is the most significant.From 28 d to 90 d,along with the age growth,the secondary reaction of the gel material generated by the corresponding increase,micro particle packed into the concrete pore,the formation of dense structure,concrete has been improved.
作者
罗小博
宋彧
郭启明
高旭东
LUO Xiaobo;SONG Yu;GUO Qiming;GAO Xudong(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,China;Western Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《混凝土》
CAS
北大核心
2021年第8期88-90,95,共4页
Concrete
基金
国家自然科学基金项目(51468040)。
关键词
粉煤灰
高性能混凝土
活性效应
二次反应
fly ash
high performance concrete
active effect
secondary reaction
