Abstract
One way to promote sustainability in construction is through the preservation of natural resources and utilization of recycled wastes. This paper describes a laboratory study on the use of steel slag and cathode ray tube (CRT) glass for road base pavement layer. Measurements of the physical and mechanical characteristics of each sample are taken to evaluate the effectiveness of using these materials in road base pavements. The laboratory evaluation comprised of Los Angeles abrasion value (LAAV) test, California bearing ratio (CBR) test and performance characterization; the unconfined compression strength (UCS) and indirect tensile strength (ITS) tests were also performed. The values for LAAV are satisfactory, indicating that the steel slag and granite mixtures have adequate resistance and abrasion for use as road base pavement aggregates. The higher percentages of steel slag in the mixture produced higher CBR values for both the soaked and unsoaked mixtures. Test results also show that the mixtures containing up to 70% steel slag and 15% CRT glass meet the standards requirements. Results of the UCS and ITS tests for performance characterization showed that the performance of the sample mixture was enhanced significantly upon incorporating a higher percentage of steel slag in the mixture. The lab test results showed that the mixture composing of granite, steel slag and CRT glass is a suitable alternative made from recyclable materials, for use in road base pavement layer.
Highlights
Sustainable management is defined as effective utilization of resources in order to fulfil human needs whilst ensuring preservation of the environment, for the present generation and for future generations [1]
The aim of this study is to evaluate the performance characteristics of mixtures that contain aggregates of steel slag, cathode ray tube (CRT) glass and granite
The findings have shown that the mixture can be used as a material in road layer construction
Summary
Sustainable management is defined as effective utilization of resources in order to fulfil human needs whilst ensuring preservation of the environment, for the present generation and for future generations [1]. Preservation of natural resources and utilizations of recycled wastes are among the ways for achieving a sustainable management [2,3]. This will ensure that an effective use of resources can be achieved for future generations. Environmental and economic factors, in addition to the inadequate supply of construction materials faced by some countries have prompted the effort to identify recyclable industrial waste materials that are suitable for construction application [6]. Among the materials that could potentially be used as alternative materials in the
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