Synthetic Slag Production Method Based on a Solid Waste Mix Vitrification for the Manufacturing of Slag-Cement

• Published in: Materials Vol. 12; no. 2; p. 208
• Main Authors: Rodríguez-Galán, Mónica, Alonso-Fariñas, Bernabé, Baena-Moreno, Francisco M, Leiva, Carlos, Navarrete, Benito, Vilches, Luis F
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 09.01.2019; MDPI
• Subjects: Aggregates; Aluminum; Aluminum oxide; blast furnace slag; Catalytic cracking; Cement; Cements; Construction; Demolition; Energy consumption; Environmental impact; Fly ash; Foundry sands; Greenhouse effect; Greenhouse gases; Hydration; Landfill; Mechanical properties; Mollusks; Nonferrous metals; Organic light emitting diodes; Potential fields; Production methods; Raw materials; Recycling; Reduction; Sand casting; Scrubbers; Shells; Slag; slag-cement; Sludge; Substitutes; synthetic slags; Vitrification; waste recycling; Spain; blast furnace slag; synthetic slags; waste recycling; slag-cement
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma12020208

Herein an innovative process to develop a potential vitreous material with cementing properties is proposed. This process paves a production path through melting industrial waste and subsequently cooling the casting in water. The idea erases the need to reduce the environmental impact of the cement industry in terms of natural resources consumption as well as the re-utilization of abandoned wastes from other industries. The recycled industrial wastes were selected according to the amount of waste produced in the industrial field and its suitable chemical composition, such as construction and demolition waste and/or shells from shellfish. As a main result, the mechanical properties showed by our novel material were worse than those reported by blast furnace slag (25⁻28 MPa for two different proportions) for seven days and better (43⁻52 MPa for two different proportions) for 28 days. The rest of the properties evaluated were in agreement with the standards' requirements. Hence, this novel process would help to minimize the environmental impact of these wastes at the same time that their use in the cement industry would reduce the consumption of raw materials.