Mechanical characteristics of lightweight concretes obtained by aggregate replacement

Abstract

The paper presents the experimental results of studies on lightweight concrete prepared by replacing the aggregates with the waste of sawdust in different dosages. The concrete was prepared with cement, fly ash, and aggregates in three sorts and sawdust waste. The aggregates 0-4 mm were replaced by the waste in dosages between 40% and 100%. The density of hardened concrete and mechanical properties such as compressive strength, flexural strength, and split tensile strength were experimentally determined and discussed. The densities of all mixes were under 2000 kg/m3. The density and mechanical properties are decreasing when the waste dosage is increasing.