Structural response of concrete pavement slabs under hygrothermal actions

摘要: Abstract This paper presents a comprehensive evaluation of the structural response concrete pavement slabs subjected to ambient environmental actions. Experimental data come from six bonded overlay asphalt pavements built with rapid strength mixtures. The mixtures contained either portland cement or calcium sulfoaluminate cement, and included an internally cured pre-wetted lightweight aggregates. were instrumented temperature, relative humidity, strain sensors. measured temperatures strains analyzed by using model that includes two components, one for moisture-related shrinkage another thermal deformations. analysis collected over fifteen months shows environment actions considerably impact coefficient expansion (CTE) concrete. Because drying, deformations up 65% larger than predicted based on CTE determined in laboratory under saturated conditions following AASHTO T 336. experimental supplements understanding how drying autogenous accumulates field, depending mixture type weather conditions. results this study question validity number assumptions adopted current mechanistic-empirical design procedures pavements, including constant depth penetration slabs.