摘要
本文主要研究了不同细度粉煤灰复掺对高强混凝土常温以及高温热处理后力学性能的影响。研究结果表明:不同细度粉煤灰复掺对高强混凝土力学性能有着明显的改善作用,但是这种复掺效果对不同类型高强混凝土的影响存在差异,对偏高岭土基高强混凝土早期力学性能的改善并不明显,主要提升其后期力学性能,但是对于普通高强混凝土整个龄期都有提升效果。不同细度的粉煤灰复掺可以优化单掺超细粉煤灰浆体在高温400℃下存在的结构缺陷,显著地提升高强混凝土的高温力学性能,对偏高岭土基高强混凝土高温力学性能的提升达到了12.36%。
The effect of fly ash mixed with different fineness on the mechanical properties of high-strength concrete before and after high temperature heat treatment was studied in the paper.The results showthat the mechanical properties of high-strength concrete were obviously improved by adding different fineness fly ash,but the effect of this kind of mixing on different types of high-strength concretewas different.The improvement of early mechanical properties of metakaolin-based high-strength concrete was not obvious.It mainly improves its mechanical properties at the later stage,but it can improve the whole age of ordinary high strength concrete.The compound admixtureof different fitness fly ash could optimize the slurry structural defects produced by doping ultrafine fly ash at high temperature of 400℃,which significantly improved the high-temperature mechanical properties of high-strength concrete.The mechanical properties of metakaolin-based high-strength concrete at high temperature have been improved by 12.36%.
作者
周建伟
余保英
程宝军
ZHOU Jianwei;YU Baoying;CHENG Baojun(China Construction West Building Materials Research Institute,Chengdu 610094,China)
出处
《粉煤灰综合利用》
CAS
2020年第3期75-78,共4页
Fly Ash Comprehensive Utilization
关键词
高强混凝土
粉煤灰
偏高岭土
alkali high strength concrete
fly ash
metakaolin
作者简介
周建伟(1993-),男,硕士,主要研究方向为新型低碳胶凝材料的制备与应用。
