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。

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.