The Thermal Conductivity and Mechanical Properties of Waste Granulated Slag Aggregate Concrete

Abstract

This study deals with the research of the use of the waste Ferrochromium slag as lightweight aggregate of concretes. These
materials were examined whether they are used for lightweight aggregates instead of natural aggregates or not. Therefore, the
granulated slag aggregate (GSA) was used to produce the waste lightweight aggregate concrete (WLC) in different rate instead of
natural aggregate. To determine the effect of GSA ratio, different cement dosage on the some mechanical properties and thermal
conductivities of concrete, 0%, 25%, 50%, 75% and 100% GSA ratios were used instead of normal aggregate by volume, 300, 400,
500 kg/m3cement dosages were used and 3±1cm slump was also used in this study. Some properties such as unit weights, thermal
conductivities, compressive strengths and modulus of elasticity of these WLC obtained were compared to the some properties
of the concrete by using sand. It was observed that the unit weights of the concretes produced by using the GSA were 17%-20%
lower than those of the concretes by using normal aggregate (NA), being the thermal conductivity 1.95%-43.9% and the modules
of elasticity as well as the compressive strengths were inversely changed with the increase of being used GSA ratio. The results
indicated that the GSA can be safely used in the production of insulation concrete and semi lightweight concrete.