The effects of chloride salts on concrete durability have been financially and logistically overwhelming. Current test methods for quantifying diffusivity of chlorides in concrete are time consuming and demanding. A comprehensive electrical resistivity model has been developed to quantify the chloride diffusion coefficient of concrete. The model employs the modified Nernst-Einstein equation along with an ionic concentration sub-model, a pore solution conductivity sub-model, and a binder hydration sub-model. The sub-models, which account for the concentrations of Na⁺, K⁺, Ca²⁺, and OH⁻ ions in the pore solution derived from the binder degree of hydration, binder chemical composition, and alkalis binding to the cement hydration products, are included to accurately quantify the conductivity of the pore solution. Moreover, an experimental program was developed to verify and validate the accuracy and completeness of the electrical resistivity model. The experimental variables are volume fraction of coarse aggregate, water to binder ratio, total binder content, and silica fume (SF) and ground granulated blast furnace slag (GGBFS) as supplementary cementing materials (SCMs). The model results are found statistically equal to experimentally quantified chloride diffusion coefficient values and possess high accuracy and precision for a wide range of concrete mixture, binder composition and age.

氯化物盐对混凝土耐久性的影响在财务和后勤上都是压倒性的。目前用于量化混凝土中氯化物扩散性的测试方法既费时又费力。已经开发了综合电阻率模型来量化混凝土的氯离子扩散系数。该模型使用改进的Nernst-Einstein方程以及离子浓度子模型，孔隙溶液电导率子模型和粘合剂水合子模型。子模型，占的Na的浓度⁺，K ⁺，钙²⁺，和OH ^-孔隙溶液中的离子源自粘合剂的水合度，粘合剂的化学组成以及与水泥水合产物结合的碱，可准确定量孔隙溶液的电导率。此外，开发了一个实验程序来验证和验证电阻率模型的准确性和完整性。实验变量是粗骨料的体积分数，水与粘结剂的比例，总粘结剂含量，硅粉（SF）和磨细的高炉矿渣（GGBFS）作为辅助胶结材料（SCM）。发现该模型结果在统计上等于实验量化的氯离子扩散系数值，并且对于广泛的混凝土混合物，粘合剂组成和使用年限具有很高的准确性和精度。