The Influence of Extra Mixing Water on the Properties of Structural Lightweight Aggregate Concrete

Because of high water absorption capacity of lightweight aggregates, the workable concrete mixtures become stiff within a few minutes of mixing. Rather, many ready mix producers will typically pre-wet the aggregate, however this procedure may complicate the technological process. Extra water in structural lightweight aggregate concrete apart workability affects the degree of cement hydration as well as deformation properties of concrete. So, the main objective of this research is to determine the impact of volume of water per cubic meter of concrete needed to be supplied by LWA or by adding extra mixing water on the properties of SLWAC - workability, slump loss, relative humidity change, autogenous shrinkage, and compressive strength. (C) 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).