Effect of Curing Condition and Temperature on Surface Resistivity Measurements

The durability of concrete is widely recognized to be controlled by the ingress of detrimental agents. Here, preventing penetration of water, oxygen, carbon dioxide along with minimizing ionic migration within the material is key to maximize material performance and longevity. Recently, investigations have demonstrated that electrical methods such as surface resistivity are accurate means for assessing the quality of a concrete mixture based on its performance in resisting ionic flow. However, there are many factors which may influence the accuracy of the measured values due to the test principle itself and the inherent variability of concrete materials. This study investigates the influence of sample conditioning, curing method and curing temperature, on resistivity measurement. It evaluates whether variations of curing temperature within ASTM specified limits have a significant effect on the surface resistivity measurement along with ASTM acceptable means of saturation (moist curing and immersion curing).


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