An overview on performance of steel slag in highway industry
Aziz, MMA and Shokri, M and Ahsan, A and Liu, HY and Tay, L and Muslim, NH, An overview on performance of steel slag in highway industry, Journal of Advanced Research in Materials Science, 67, (1) pp. 1-10. ISSN 2289-7992 (2020) [Refereed Article]
Transportation and highway industry are going to use sustainable and recycling materials to address the two global issues:
environment and energy. One of the materials is steel-furnace slag, a sustainable waste material, which includes two types, i.e.
compound aggregate brings out as a consequence of Electric Arc Furnace (EAF) and Basic Oxygen Furnace (BOF). Steel slag can
replace the traditional aggregates because it has a feature that almost same to those traditional aggregates and it is easily secure
as a by-product from the steel industry. The recent experimental researches in preliminary studies have demonstrated chemical,
mechanical and physical and properties of the steel slag. California bearing ratio (CBR) value of steel slag is between 200 and 300%,
whereas CBR of crushed aggregate is only from 80 to 100%. Furthermore, asphalt mixture using steel slag presents better
mechanical characteristics than those of the corresponding asphalt with 100% natural aggregate. Combination of 30% steel slag
and 70% natural aggregates in bitumen mixture shows excellent performance as surface course of roads. Hence, operation of steel
slag in road construction reduces land fill, saves natural resources and improves the strength of pavement to sustain a heavier and
higher volume of vehicles. The overall purposes of this review paper are collecting chemical, physical and mechanical characteristics
of steel slag for illustrating its performance, highlighting the previous studies on the use of steel slag in road construction and the
effect of different percentage of steel slag upon pavement as a replacement for natural aggregates.