Abstract
Steel slag has been commonly used in road engineering as cementitious material; however, its application in base course is not widely reported. Four contents of steel slag (0%, 30%, 50%, 75% by volume) were blended into different cement (3%, 4%, 5%, 6% by weight)-treated aggregates. Mechanical properties, volume stability, economic benefits and environmental influences of steel slag mixtures were investigated for the feasibility of applying steel slag in semi-rigid base course. Abrasion, crushing and elongated particle content were compared against limestone aggregate, showing that steel slag has the potential of replacing natural aggregate in concrete. Steel slag is beneficial for reinforcement of the strength and stiffness. The mixture has the highest strength and stiffness when bended with 50% steel slag at 4% cement content. By treating steel slag with CH3COOH or adding silica fume, volume expansion of steel slag can effectively be controlled. Larger size steel slag (>4.75 mm) and higher cement content are recommended due to heavy metal leaching risk, especially in salty humid areas. Steel slag has sound economic benefits due to the relatively low price. Environmental benefits can also be achieved given that the transport CO2eq emission of steel slag is accounted for. With proper control in production process, steel slag is a very promising alternative material to be utilized in cement-stabilized base course in road engineering.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Hunan Province
Subject
General Materials Science
Reference32 articles.
1. National Bureau of Statistics of China (2022, August 25). Crude Steel Output, Available online: http://data.stats.gov.cn.
2. Use of Selected Industrial Waste Materials in Concrete Mixture. Environ. Prog. Sustain;Energy,2011
3. Ahmad, J., Zhou, Z., Martínez-García, R., Vatin, N.I., De-Prado-Gil, J., and El-Shorbagy, M.A. (2022). Waste Foundry Sand in Concrete Production Instead of Natural River Sand: A Review. Materials, 15.
4. Ahmad, J., Martínez-García, R., De-Prado-Gil, J., Irshad, K., El-Shorbagy, M.A., Fediuk, R., and Vatin, N.I. (2022). Concrete with Partial Substitution of Waste Glass and Recycled Concrete Aggregate. Materials, 15.
5. Industrial waste in concrete mixtures for construction of underground structures and minerals extraction;IOP Conf. Ser. Mater. Sci. Eng.,2020
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