期刊论文

Experimental study on chloride ion diffusion of high-performance concrete with fly ash and silica fume

中文

湖南城市学院学报(自然科学版)

1672-7304

2022

31

2

23-29

10.3969/j.issn.1672-7304.2022.02.0006

国家自然科学基金项目（52108135）；

本校为第一机构

为了探索高性能混凝土(HPC)中粉煤灰(FA)和硅灰(SF)对其抗氯离子扩散的影响,对粉煤灰和硅灰复合材料的氯离子扩散进行了试验研究.研究了水胶比(W/B)、二元(硅酸盐水泥-粉煤灰和硅酸盐水泥-硅灰)和三元(硅酸盐水泥-粉煤灰-硅灰)矿物组合对混凝土抗压强度和氯离子扩散的影响.研究结果表明:不同混凝土的抗压强度均随着W/B的减小而增大,且W/B对普通混凝土强度的影响比HPC更明显;硅灰或粉煤灰的含量对增强混凝土的抗压强度是有限的;在7.5～17.5 mm的深度范围内,W/B对氯离子浓度的影响最为显著,且氯离子浓度随着W/B的增大而减小;三元矿物组合比二元矿物组合更能有效地防止氯化物扩散.

In order to explore the effect of fly ash(FA)and silica fume(SF)on concrete resistance to chloride ion diffusion in high performance concrete(HPC),the chloride ion diffusion of fly ash and silica fume composites was studied in this paper.The effects of water-binder ratio(W/B),binary mineral combinations(Portland cement-fly ash and Portland cement-silica fume)and ternary mineral combinations(Portland cement-fly ash-silica fume)on the compressive strength and chloride diffusion of concrete are studied.The results show that the compressive strength of concrete increases with the decrease of W/B,a...