As a new type of cement-matrix composite material, coral aggregate concrete exhibits excellent properties, such as local material availability and enhanced efficiency, while being cost-effective. Coral aggregate concrete can be viable for construction on islands and reefs. Reinforced concrete structures generally exhibit low durability in marine environments, owing to long-term corrosion by chloride salts. Therefore, resistance to chloride ion attacks plays a significant role in improving the durability of concrete structures. As a non-destructive testing technique, resistivity is used for characterising the resistance of concrete to chloride ion penetration. In this study, the resistivity of coral aggregate concrete is measured using an improved alternating-current test method, and the improved method overcomes the limitations that is prone to polarization reaction and heating of the solution under exposure to voltage for an extended period. Porosity was used to analyze the reasons for the different resistivity values of coral concrete from micro-aspects. The resistivity model at 365 days was established considering the effects of temperature, humidity, admixture, and water-binder ratio on coral aggregate concrete. The hydration characteristics of cement and admixture were used to establish a time-varying model for predicting the resistivity of coral aggregate concrete.

作为一种新型的水泥基复合材料，珊瑚骨料混凝土具有优异的性能，例如局部材料的利用率和提高的效率，同时又具有成本效益。珊瑚骨料混凝土可以在岛屿和礁石上建造。由于氯化物盐的长期腐蚀，钢筋混凝土结构通常在海洋环境中表现出低耐久性。因此，抗氯离子侵蚀在提高混凝土结构的耐久性方面起着重要作用。作为一种无损检测技术，电阻率用于表征混凝土对氯离子渗透的抵抗力。在这项研究中，采用改进的交流电测试方法测量了珊瑚骨料混凝土的电阻率，改进后的方法克服了长期暴露于电压下易于发生极化反应和溶液加热的局限性。孔隙率从微观角度分析了导致珊瑚混凝土电阻率值不同的原因。考虑温度，湿度，外加剂和水灰比对珊瑚骨料混凝土的影响，建立了365天的电阻率模型。利用水泥和掺合料的水化特性建立了时变模型，以预测珊瑚骨料混凝土的电阻率。考虑温度，湿度，外加剂和水灰比对珊瑚骨料混凝土的影响，建立了365天的电阻率模型。利用水泥和掺合料的水化特性建立了时变模型，以预测珊瑚骨料混凝土的电阻率。考虑温度，湿度，外加剂和水灰比对珊瑚骨料混凝土的影响，建立了365天的电阻率模型。利用水泥和掺合料的水化特性建立了时变模型，以预测珊瑚骨料混凝土的电阻率。