Measurements and Experimental Analysis of Temperature Variations in Portland Cement Concrete Pavement Systems

摘要

The temperature variations in the vertical, longitudinal, and transverse directions of Portland cement concrete pavements were measured and comprehensively analyzed from the beginning of the concrete placement. The measurements were taken at several different locations for various concrete slab thicknesses. The effects of the pavement surface conditions, such as reflectivity, shading, and covering on the concrete temperatures were evaluated. The results showed that the significant differences in the maximum concrete temperatures on the placement day were observed according to the concrete placement time. Since the zero-stress temperature is a function of the maximum temperature on the placement day, the placement time would be an important factor that affects the pavement behaviour and performance. The pavement surface conditions also affected the concrete temperatures significantly.