Mechanical, Thermal and Durable Performance of Wastes Sawdust as Coarse Aggregate Replacement in Conventional Concrete

Abstract

Wood yields a number of by-products and Sawdust is as useful as others. Sawdust is regarded as a waste material and is effectively utilised as sawdust concrete in the construction of buildings. It is capable to be utilised as light-weight concrete and holds the quality of long duration heat transfer. In this study, three different ratios (1:1, 1:2 and 1:3) volume mix proportions of cement to sawdust were adopted to make sawdust concrete. At varied intervals of 7, 28 and 56 days of air curing, thermal and mechanical properties like workability, density, elastic modulus, strength and heat transfer were probed of mentioned sawdust concrete proportions. The resistance to elevated temperatures was also evaluated after 28 days of age; weight loss, residual compressive strength, surface texture and ultrasonic pulse velocity were considered in evaluation process. The findings showed that increase in sawdust volume affected to decrease the workability, strength and elevated temperatures resistance. However, the concrete having higher proportion of sawdust performed competently and well in terms of thermal conductivity. Moreover, a decrease in the heat transfer of sawdust was also observed. Examining the all-embracing mechanical and physical properties, sawdust can be effectively utilised in the construction of buildings.

Engineering Properties of Waste Sawdust-Based Lightweight Alkali-Activated Concrete: Experimental Assessment and Numerical Prediction

“…It is evident that, with the increasing content of sawdust and decreasing amount of river sand/crushed gravel, the UPV of the prepared concretes was decreased, which was ascribed to the increase in the sawdust-mediated porosity. The present findings agreed well with those of a previous study [47]. .…”

“…For a constant solution to binder ratio, the workability of the concretes was reduced with the increase in the sawdust amount as a substitute for river sand and crushed gravel. Several researchers [45][46][47] have obtained similar trends of results for the reduction in the workability of concrete containing lightweight aggregates. The limitations associated with the workability decrease in the concrete mixes due to the utilization of sawdust wastes as substitute for natural sand can be overcome by applying super-plasticizer.…”

Utilization of sawdust composites in construction—a review

“…When cement, sawdust, and sand were combined in the following ratios: 1:1:1, 1:2:1, and 1:3:1 it was found that the 1:3:1 admixture had low thermal conductance compared to the other mix. Because there is more sawdust in the 1:3:1 mixture than in the other two, there is less heat transfer through that mixture [100,109].…”

Investigating the fresh and mechanical properties of wood sawdust-modified lightweight geopolymer concrete

“…In recent years, the use of industrial by-products, including sawdust, to produce LWCs has attracted many researchers. The thermal traits of sawdust-based concrete were investigated (Ahmed et al, 2018; Sosoi et al, 2022; Huseien et al, 2019). It was show that the inclusion of sawdust in the concrete matrix relatively reduces thermal conductivity by around 20% compared to OPC-based concrete.…”