持续荷载和锂渣取代量对混凝土抗氯离子渗透性能的影响

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (2): 598-606.

所属专题：资源综合利用

持续荷载和锂渣取代量对混凝土抗氯离子渗透性能的影响

李宇航¹, 温勇¹, 韩国旗^2,3, 郝恩泽¹, 刘佳¹, 马丽莎¹

1.新疆大学建筑工程学院,乌鲁木齐 830047;
2.喀什大学土木工程学院,喀什 844006;
3.同济大学材料科学与工程学院,上海 201800

收稿日期:2022-08-09 修订日期:2022-11-02 出版日期:2023-02-15 发布日期:2023-03-07
通信作者: 温勇,教授。E-mail:wenyong9731@126.com
作者简介:李宇航(1995—),男,硕士研究生。主要从事混凝土耐久性的研究。E-mail:779226653@qq.com
基金资助:
国家自然科学基金(52168036);上海市工程结构安全重点实验室开放课题(2018-KF08);新疆维吾尔自治区天山青年计划(2018Q014);2021年新疆维吾尔自治区自然科学基金(2021D01B04)

Effects of Continuous Load and Lithium Slag Content on Chloride Ion Permeability Resistance of Concrete

LI Yuhang¹, WEN Yong¹, HAN Guoqi^2,3, HAO Enze¹, LIU Jia¹, MA Lisha¹

1. College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830047, China;
2. College of Civil Engineering, Kashi University, Kashi 844006, China;
3. School of Materials Science and Engineering, Tongji University, Shanghai 201800, China

Received:2022-08-09 Revised:2022-11-02 Online:2023-02-15 Published:2023-03-07

摘要/Abstract

摘要： 为考察受载锂渣混凝土抗氯离子渗透性能,本文设计了锂渣取代水泥质量0％、10%、20%和30%的C20、C30和C40混凝土,对混凝土试件施加极限压荷载的10%、30%和50%,作为持续压应力,进行氯离子渗透性能试验。结果表明:水灰比范围在0.40~0.62时,电通量随着水灰比的增大而增大;对于施加不同压应力的混凝土,当压应力比达到0.3时,C20和C30混凝土电通量有明显的提升,当压应力比达到0.5时,C40混凝土电通量有明显的提升;对于不同锂渣取代量的混凝土,电通量随着锂渣取代量的增大而减小。结合 Fick第二定律和质量守恒定律,建立在持续荷载作用下锂渣混凝土氯离子渗透模型,结果表明,氯离子在浸泡环境下的渗透性能符合试验规律,模拟结果与试验结果一致。

关键词: 混凝土, 荷载, 锂渣, 氯离子, 渗透性, 数值模拟

Abstract: In order to investigate the chloride ion permeability resistance of lithium slag concrete under pressure circumstance, C20, C30 and C40 concrete with different content of lithium slag (0%, 10%, 20% and 30%, mass fraction) were designed in this paper. It applied 10%, 30% and 50% of the ultimate compressive load as continuous compressive stress to carry out the concrete chloride ion permeability tests. The results show that the electric flux increases with the increase of water-cement ratio when the water-cement ratio is in the range of 0.40 to 0.62. For the concrete with different stresses applied, the electric flux of C20 and C30 concrete increases significantly when the compressive stress ratio reaches 0.3, and the electric flux of C40 concrete increases significantly when the compressive stress ratio reaches 0.5. For the concrete with different lithium slag content, the electric flux decreases with the increase of lithium slag content. Taking Fick's second law and the law of conservation of mass into consideration, the model of chloride ion permeability of lithium slag concrete was established under continuous load. The results show that the permeability of chloride ion in immersion environment is in accordance with the experimental law, and the simulation results are consistent with the experimental results as well.

Key words: concrete, load, lithium slag, chloride ion, permeability, numerical simulation

中图分类号:

TU528

李宇航, 温勇, 韩国旗, 郝恩泽, 刘佳, 马丽莎. 持续荷载和锂渣取代量对混凝土抗氯离子渗透性能的影响[J]. 硅酸盐通报, 2023, 42(2): 598-606.

LI Yuhang, WEN Yong, HAN Guoqi, HAO Enze, LIU Jia, MA Lisha. Effects of Continuous Load and Lithium Slag Content on Chloride Ion Permeability Resistance of Concrete[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(2): 598-606.

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持续荷载和锂渣取代量对混凝土抗氯离子渗透性能的影响

Effects of Continuous Load and Lithium Slag Content on Chloride Ion Permeability Resistance of Concrete

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