Influence of Combined Transportation Time and Temperature on Flow Properties of Self-Consolidating Concrete

Abstract

AbstractThe investigation presented herein was intended to study the influence of combined transportation time and hot and cold temperatures on the flow properties of self-consolidating concretes (SCC). Seven different temperatures (43, 36, 28, 21, 14, 7, and −0.5°C) and five transportation times (10, 20, 40, 60, and 80 min) were adopted. Transportation time of 10 min and temperature of 21°C were used as the control conditions. Polycarboxylate-based high range water-reducing admixture (HRWRA) and viscosity modifying admixture (VMA) were used to produce different matrices that met the target unconfined slump flow of 635 and 711 mm and dynamic stability of stable to highly stable conditions. In general, the selected self-consolidating concrete produced and transported in extreme temperatures experienced slump flow losses in hot conditions and slump flow gains in cold environments when compared to those of the equivalent concretes produced under the control condition. Significant losses in unconfined flow ra...