Abstract: In flexible pavement construction, the bituminous mixes are most commonly used. It consists of bitumen (used as a binder) and mineral aggregate which are mixed together, laid down in layers. The performance of bituminous mixes is very poor under various situations. Considering this a lot of work has been done on the modification of bitumen. Steel slag is a co-product of the steel industry and can be used potentially as a sustainable construction material in bituminous mix with proper mix design. As natural aggregate sources are becoming depleted due to high demand in road construction and the amount of disposed waste material keeps increasing, researchers are exploring the use of alternative materials which could preserve natural sources and save the environment. This study evaluates the use of Steel Slag as a substitute for fine aggregates in the production of bituminous mix for road construction. Based on Intensive laboratory testing program, the characteristic properties of steel slag were assessed to determine its suitability to be used in bituminous mix. Four different percentages (0, 25, 50, 75, and 100%) of steel slag aggregate were used, and the proposed mix designs for bituminous concrete mix were conducted in accordance with Marshall Mix design. The experiment results revealed that the addition of Steel slag has a significant improvement on the properties of bituminous concrete mix. An Increase in density and stability and a reduction in flow and air voids values were clearly observed in specimens prepared with (0, 25, 50, 75, 100) percentages. It is concluded that the steel slag can be considered reasonable alternative source of fine aggregate at 50 percentages for bituminous concrete mixture production.
Keywords: Steel Slag, Bituminous concrete (BC), Marshall Properties and Indirect tensile strength.
Title: Experimental Study on Mechanical Properties of Bituminous Paving Mixes Using Steel Slag
Author: Dr. Suji D, Deepak R, Prabhakar P
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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