Environmental impacts of utilizing waste steel slag aggregates as recycled road construction materials

Maghool, Farshid; Arulrajah, Arul; Du, Yan-Jun; Horpibulsuk, Suksun; Chinkulkijniwat, Avirut

doi:10.1007/s10098-016-1289-6

Cited by 92 publications

(40 citation statements)

References 19 publications

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“…EAF slag (EAFS) has a long history as an aggregate in construction materials and other industrial applications after crushing and sieving [8]. Traditionally employed in granular layers, such as subgrades and bases for road and railway embankments [9,10,11], it is a quality gravel for unbound uses, thanks to its high abrasion resistance, roughness, California Bearing Ratio (CBR), and angularity. The features of EAFS are also suitable for use as an aggregate in asphalt mixes for road pavements, [8,12,13]; the high polishing resistance and low abrasion loss of EAFS means that it is in high demand, even for surface layers.…”

Section: Introductionmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures.

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Section: Introductionmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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“…For instance, the crumb rubber modified asphalt contains heavy metals such as polycyclic aromatic hydrocarbons (PAHs) and zinc (Zn) due to the high concentration of toxic chemicals that can affect our health and the environment [5]. The result of heavy metal analysis showed that heavy metals in steel slag do not pose any environmental risks or leaching problems when used as aggregates in road applications [137]. Besides, the environmental impact of waste materials has raised concerns about the possible environmental harm caused by the improper handling of recycled materials, as well as concerns about leaks, spills, dumps, or other forms of hazardous substances released into the environment.…”

Section: Considerations Of Environmental and Economic Aspectmentioning

confidence: 99%

A Review of the Utilisation of Recycled Waste Material as an Alternative Modifier in Asphalt Mixtures

2020

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The possibility of using waste materials in road construction is of great interest as their utilisation may contribute to reducing the problems of hazard and pollution and conserve natural resources. Thus, there is an urgent need to find a sustainable method for using waste materials as a substitute in the standard asphalt binders. There are several concerns about the physical and chemical properties and mechanical performance of asphalt pavements incorporated with waste material in the effort to reduce permanent deformation of the road surface. This review article presents a brief discussion of the asphalt mixtures modified with waste material, and the recycled materials used as a modifier in the asphalt mixture. The present paper summarises the use of crumb rubber, crushed concrete, steel slag, glass fibre and plastic waste in asphalt mixtures. The use of waste materials as a modifier in asphalt mixture resulted in improved asphalt pavement performance. Results advocate that rubberised asphalt mixture with desired properties can be designed as an additive with a friendly environmental approach in construction materials. The researches that adopted the influence of usage, recycle waste material to improve the performance of the asphalt of the road are still limited compared to other construction fields. Doi: 10.28991/cej-2020-SP(EMCE)-05 Full Text: PDF

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“…In addition, steel slags are highly angular with improved micro and macro texture [20][21][22]. Slags should be merely used as a fine or coarse fraction since hot mix asphalt comprises of steel slag only, which is susceptible to air voids and bulking effects [14,[23][24].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Rutting Behavior of Modified Asphalt Mixtures with Waste Materials

Moazami

Sahaf

Moghaddam

2019

NMCE

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Recycling of waste materials has significant environmental and economic advantages. Plastic containers and steel slag waste solids were incorporated in Stone Mastic Asphalt (SMA) and the rutting performance of modified asphalt mixtures was investigated. Slab specimens with three percentage of Polyethylene Terephthalate (PET) including 3, 5 and 7 percent in two forms (PET particles and PET fibers) were prepared and wheel tracking test was performed. For various samples, rutting profiles were modeled by the Zhou model in the MATLAB environment. It was found that modified samples had better capability to resist permanent deformation. Induced rutting depth was the lowest for specimens modified with 5 percent PET followed by 7 and 3 percent, respectively. Moreover, adding PET in the form of fiber was more effective and exhibited the lowest damage ratio. Based on the obtained results, modified samples with 5 percent PET fiber caused 35 percent less rutting. According to life cycle ratio analysis, in average S-5P-F lasted 3.35 times more than the slag control sample.

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Environmental impacts of utilizing waste steel slag aggregates as recycled road construction materials

Cited by 92 publications

References 19 publications

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

A Review of the Utilisation of Recycled Waste Material as an Alternative Modifier in Asphalt Mixtures

Investigating the Rutting Behavior of Modified Asphalt Mixtures with Waste Materials

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