Abstract
Over recent decades there has been rapid increase in the industrial waste materials and by-products yields due to the progressive growth rate of population, development of industry and technology and the growth of consumerism. With the growing environmental pressures to reduce waste and pollution, Intensive research studies have been conducted to explore all suitable reuse methods. Wastes such as construction waste, blast furnace, steel slag, coal fly ash and bottom ash have been approved in many places as alternative materials in bridges, roads, pavements, foundations and building construction. The use of industrial solid waste as a partial replacement of raw materials in construction activities not only saves landfill space but also reduces the demand for extraction of natural raw materials. Ferrochrome slag is a by-product from the production of chrome. There are environmental and economic advantages in seeing slags as a potentially useful resource rather than as waste products. Slag management at ferrochrome producing companies has been influenced by the limited space available and financial cost implications of the slag dumps. Internationally, e.g. South Africa, India, Norway, Turkey, East Europe, China, Sweden and USA, ferrochrome slag is used commercially in the road and construction Industries. This material is being used for road construction, as aggregates in concrete industry, brick manufacturing, and in pavement construction as engineering fill and has recently been tried in cement. This paper presents an overview of the recent advances of the use of ferrochrome slag in various civil engineering applications such as road construction, and cement and concrete industries.
Highlights
The greatest user of natural resources is the rapid developing sector of the construction industry
This paper presented an overview of the recent research on the use of ferrochrome slag in various civil engineering applications such as road construction, and cement and concrete industries
The study concluded that the physical and mechanical properties of FeCr are as good or better than those of natural aggregate which make it suitable material to be used as aggregate replacement in concrete and road construction applications such as in rigid and flexible pavements and base or sub-base materials
Summary
The greatest user of natural resources is the rapid developing sector of the construction industry. In Oman, large quantities of copper slag (60,000 tons/year), cement by-pass dust (25,000 tons/year), spent catalyst (7300 tons/year) and ferrochrome slag (355,000 tons/year) are produced, most of which is not effectively utilized and disposed on-site without any reuse. The generation of such materials are expected to increase in the future. The use of the industrial slag products such as FeCr slag in beneficial applications such as materials in building and road construction reduces the depletion of the natural resources and it results in positive environmental effects. The water absorption rate is relatively high due to the porous nature of the slag
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