Abstract
Self-consolidating concrete (SCC) is a highly flowable concrete that is characteristically sensitive to mixing and hauling variables such as transportation time. In real-world applications, lengthy hauling times are often necessary for transportation to the job site and can result in deviations in the fresh properties of SCC. In this investigation, air-entrained SCCs were developed at a constant water-to-cementitious material ratio (w/cm) of 0.40 and air content of 6% for 3 distinct slump flows of 559, 635, and 711 mm (22, 25, and 28 in.). Test results revealed that the slump flow losses up to 39% were recorded after 90 minutes of hauling time. The air content increased with hauling time, ranging from 2.6-4.8%. The air void characteristics improved with hauling time, with an average increase in specific surface of 9.5 mm–1 (241.3 in.–1) and an average decrease in spacing factor of 64 μm (0.0025 in.).
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