MICROPRESTRESS SOLIDIFICATION THEORY-BASED EXPERIMENTAL AND MODELING OF EARLY-AGE CONCRETE TENSILE CREEP AT ELEVATED TEMPERATURES

This paper investigates nsile creep behavior of early-age concrete at normal and elevated temperature numerically and experimentally. The tensile creep is measured under the temperature of 23^oC and 43^oC and the specimens are loaded at the ages of 1, 7, and 28 days. A numerical model is established to account for the temperature effect from cement hydration and the environment. The results show that the tensile creep of early-age concrete is very sensitive to temperature rise and loading ages. The established microprestress solidification theory-based numerical model predicts tensile creep of early-age concrete at elevated temperature very well, and it can be used for commercial finite element analysis.