Work

Performance Effects of Mixed Mortars with Ladle Furnace Slag as a Replacement for Hydrated Lime

Year: 2025

Type: article

Abstract: Amongst the byproducts of steel industry is ladle furnace slag (LFS), with a chemical composition similar to limes, especially in the high content of calcium oxide and hydroxides. Its binding potential is improved with finer texture, making it viable for use as a supplementary cementitious material (SCM). Therefore, this study investigated the effects of a total replacement of hydrated lime (HL) for LFS in masonry mortars, also exploring whether pozzolanic addition of metakaolin (MK) could enhance it, tested both at 28 and 180 days. The experimental results, obtained at 28 and 180 days, showed that the replacing HL for LFS improved the mechanical properties of the mortars, due to the greater amount of compounds of LFS also present in the OPC, but not in the HL, such as Fe2O3, Al2O3 and SiO2. These findings suggest the potential of LFS for application in masonry mortar promoting strategies of circular economy.

Source: Materials Research

DOI: 10.1590/1980-5373-mr-2025-0151

Authors: Tayná Fracão da Silva, Everton de Freitas Cordova de Souza, Eduardo Freire Mariano, Gisleiva Cristina dos Santos Ferreira, Mylena Alves de Castro, Armando Lopes Moreno Junior

Institution: Universidade Estadual de Campinas (UNICAMP)

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Industry, innovation and infrastructure

Open Access status: diamond

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, ArcelorMittal