Curling Under Different Environmental Variations As Monitored In A Single Concrete Slab

Abstract

More than five months of sensor response monitoring was conducted on a single Portland Cement Concrete (PCC) slab test at the National Airport Pavement Test Facility (NAPTF). Reliable data for relative humidity at different depths within the slab have been retrieved. The monitored data also included temperature, horizontal and vertical displacements, and strains at different locations. The completely wet curing method kept the slab flat within that period. However, when the wet curing stopped, the maximum slab curling reached a very high level. Correlations between the horizontal and vertical displacements, and the correlation between displacements and temperature and relative humidity variations are analyzed. The analysis of correlations between slab curling and concrete strains are also presented. Significant findings are obtained and summarized.