Application of reclaimed basic oxygen furnace slag asphalt pavement in road base aggregate

Chen, Shih Huang; Lin, Deng Fong; Luo, Huan-Lin; Lin, Zi Yang

doi:10.1016/j.conbuildmat.2017.09.136

Cited by 22 publications

(7 citation statements)

References 10 publications

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“…Previous studies on BOF slags used as aggregates in concrete and their advantageous properties have been extensively reported [4,5,[8][9][10][11]. However, the BOF slag contains free-CaO and free-MgO that can result in volumetric instability due to their reaction with water, yielding alkaline earth metal hydroxides.…”

Section: Introductionmentioning

confidence: 99%

Geopolymer Technologies for Stabilization of Basic Oxygen Furnace Slags and Sustainable Application as Construction Materials

et al. 2020

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The basic oxygen furnace slag is a major waste by-product generated from steel-producing plants. It possesses excellent characteristics and can be used as a natural aggregate. Chemically, the basic oxygen furnace slag encloses free CaO and free MgO, which is the main reason for the expansion crisis since these free oxides of alkaline earth metals react with water to form their hydroxide yields. The objective of the present research study is to stabilize the basic oxygen furnace slag by using innovative geopolymer technology, as their matrix contains a vast quantity of free silicon, which can react with free CaO and free MgO to form stable silicate compounds resulting in the prevention of the basic oxygen furnace slag expansion predicament. Lab-scale and ready-mixed plant pilot-scale experimental findings revealed that the compressive strength of fine basic oxygen furnace slag-based geopolymer mortar can achieve a compressive strength of 30–40 MPa after 28 days, and increased compressive strength, as well as the expansion, can be controlled less than 0.5% after ASTM C151 autoclave testing. Several pilot-scale cubic meters basic oxygen furnace slag-based geopolymer concrete blocks were developed in a ready-mixed plant. The compressive strength and autoclave expansion test results demonstrated that geopolymer technology does not merely stabilize the basic oxygen furnace slag production issue totally, but also turns the slags into value-added products.

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Section: Introductionmentioning

confidence: 99%

Geopolymer Technologies for Stabilization of Basic Oxygen Furnace Slags and Sustainable Application as Construction Materials

et al. 2020

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“…A reduction in rutting and reduced rate of deformation of about 600 mm from the point of load impact with the addition of steel slag. Chen et al (2017) studied the application of reclaimed asphalt BOF slag as road base or subbase aggregate. CBR figures decreased with increasing percentage of RAP BOF aggregate.…”

Section: Steel Slag Utilizationmentioning

confidence: 99%

Waste materials in highway applications: An overview on generation and utilization implications on sustainability

Bamigboye

Bassey

Olukanni

et al. 2021

Journal of Cleaner Production

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The rate at which the construction industry explores and consumes non-renewable natural aggregates and other industrial products such as bitumen, lime, and cement during construction and rehabilitation of road pavements has over time proven to be environmentally degrading and non-sustainable. This, alongside the issues of high solid waste generation and inadequate disposal, has led to series of studies by various researchers to find methods to integrate these solid wastes as alternative materials in road construction and maintenance. This paper provides a simple yet detailed review of recent relevant studies conducted to understand the alarming rate of generation and the effects of reusing these waste materials in both flexible and rigid pavements. The review further outlines the advantages and disadvantages of the selected waste materials and compare the results with that of conventional materials in accordance with relevant standards while highlighting the performance, and life cycle environmental and economic sustainability implications. The study shows that the adoption of these materials offers efficiency in waste disposal while reducing the demand for natural aggregates and consequently, significantly reducing life cycle impacts and costs. The challenges limiting the effective practical implementation of these waste recycling techniques in the construction industry were discussed and possible solutions were suggested to encourage and ensure its utilization in road construction.

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“…Therefore, slag has been employed as construction resource for mitigating the pressure from expensive disposal and reducing the construction cost (Heribeert and Kuehn 2004;Hiroyuki et al 2005). The slag has been investigated to be directly used as granular base, embankments or fill, highway shoulders, and asphalt pavement after crush and screen (Chen et al 2017;Li et al 2016;Wang 2016;Yildirim and Prezzi 2017). However, usually, the slag would be stored for a certain time for gaining the saturation of moisture prior to using in order to avoid the swelling of the slag in construction (caused by lime) (Jukes 2003).…”

Section: Application In Constructionmentioning

confidence: 99%

The potential utilization of slag generated from iron- and steelmaking industries: a review

Zhang

Chen

Jiang

et al. 2019

Environ Geochem Health

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Along with iron and steel production, large amount of slag is generated. Proper management on the iron-and steelmaking slag is highly demanded due to the high cost of direct disposal of the slag to landfill, which is the most adopted management approach. In this article, the potential application of iron-and steelmaking slag has been reviewed, which included the slag utilization in construction as cement and sand, in water, soil, and gas treatment, as well as in value material recovery. In addition, the challenge and required effort to be made in iron-and steelmaking slag management have been discussed.

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Application of reclaimed basic oxygen furnace slag asphalt pavement in road base aggregate

Cited by 22 publications

References 10 publications

Geopolymer Technologies for Stabilization of Basic Oxygen Furnace Slags and Sustainable Application as Construction Materials

Geopolymer Technologies for Stabilization of Basic Oxygen Furnace Slags and Sustainable Application as Construction Materials

Waste materials in highway applications: An overview on generation and utilization implications on sustainability

The potential utilization of slag generated from iron- and steelmaking industries: a review

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