Influence of the granular skeleton packing density on the static elastic modulus of conventional concretes

摘要

Particle packing methods are very useful for reducing the cement consumption of concrete mixtures and consequently the CO2 emissions associated with them. They usually also increase the solids concentration of the mixes, which fosters particle interlock. This work evaluates the influence of the packing of aggregates on the static modulus of elasticity of concretes with compressive strengths of 25 and 40 MPa. The granular skeleton was arranged using experimental particle packing methods, maintaining a constant compressive strength throughout the process. The packing density had a relative increase of 8% and 10% for the 25 and 40 MPa concretes, respectively, and produced an average increase in the concrete static modulus of elasticity of 21% at 7 days and 8% at 28 days. (C) 2020 Elsevier Ltd. All rights reserved.