Performance of Sawdust Concrete at Elevated Temperature

Abstract

The aim of this study was to shows the behavior of sawdust concrete at elevated temperature. Sawdust is considered as waste material but nowadays this waste material is utilized in the construction of the building as sawdust concrete. Sawdust is a by-product of wood which is generally used in the production of lightweight concrete, possessing low thermal conductivity. In this study sawdust concrete was made at three different proportions of cement and sawdust 1:1, 1:2, 1:3 by volume. At these proportions, the physical and mechanical properties such as density, workability, strength, fire resistance, mass loss, ultrasonic pulse velocity and residual strength were investigated after 28 days of curing. It was found that with the increment in the amount of sawdust, the workability and strength decreases, however in terms of fire resistance, concrete with lower amount of sawdust performed well. Considering the overall physical and mechanical properties, sawdust concrete can be used in building construction.

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

“…Nowadays, speedy and meteoric development of composite structure stands in need of better concrete performance and a good quality material [1][2][3]. Though concrete is the most cost effective material but it increases dead load of the building due to its high density [4][5][6]. If the density of concrete is reduced it can lead to a number of advantages, as it then results in the reduction of the cost of handling, constructability and transportation [7][8][9].…”

“…Before it is used, its critical limitations must be taken into consideration and understood. In contrast to these limitations, advantages offered by sawdust are wide and important likewise; it reduces the dead load which is transmitted to the foundation by reducing the considerable amount of structural weight, compared to the other normal weight concrete it is highly economical, its handling, mixing and placing is easier in contrast to other types of concrete, the life of framework is prolonged as it reduces damage by exerting low pressure, its high void ratio results in advanced sound absorbent properties, and due to inclusion of wood aggregates it decreases thermal properties of concrete and results in better thermal insulation [5,17]. For the concrete sawdust, reduction in the thermal conductivity increases up to 35%, if a mass percentage of gross wood ranges from 0 to 10%.…”