Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties
A circular economy is a current tenet that must be implemented in the field of construction. That would imply the study of the possibilities of the use of waste generated, for obtaining materials the used in construction as replacements for the raw material used. One of these possibilities is the su...
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doaj-a3ee35e98eb64a0d9416f80d285c12b52020-11-25T02:01:24ZengMDPI AGMaterials1996-19442019-09-011218284510.3390/ma12182845ma12182845Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental PropertiesMaría Eugenia Parron-Rubio0Francisca Perez-Garcia1Antonio Gonzalez-Herrera2Miguel José Oliveira3Maria Dolores Rubio-Cintas4Departamento de Ingeniería Industrial y Civil, Universidad de Cádiz, 11205 Algeciras, SpainDepartamento de Ingeniería Civil, Materiales y Fabricación, Universidad de Málaga, 29071 Málaga, SpainDepartamento de Ingeniería Civil, Materiales y Fabricación, Universidad de Málaga, 29071 Málaga, SpainCivil Engineering Department, University of Algarve, 8005-139 Faro, PortugalDepartamento de Ingeniería Industrial y Civil, Universidad de Cádiz, 11205 Algeciras, SpainA circular economy is a current tenet that must be implemented in the field of construction. That would imply the study of the possibilities of the use of waste generated, for obtaining materials the used in construction as replacements for the raw material used. One of these possibilities is the substitution of the cement by slag, which contributes to the reduction of cement consumption, decreasing CO<sub>2</sub> emissions, while solving a waste management problem. In the present paper, different types of concrete made by cement substitution with different type of slags have been studied in order to evaluate the properties of these materials. Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties. As far as physical properties go, density and porosity tests were be reported and analysed, and from an environmental point of view, a leachate study was performed. It has been found that some kinds of slag (blast furnace slag) are very suitable as substitutes for cement, providing properties above those of the reference concrete, while other types (ladle furnace slag) could be valid for non-structural applications, contributing in both cases to a circular economy.https://www.mdpi.com/1996-1944/12/18/2845concreteslagvalorisationcementcircular economy |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
María Eugenia Parron-Rubio Francisca Perez-Garcia Antonio Gonzalez-Herrera Miguel José Oliveira Maria Dolores Rubio-Cintas |
spellingShingle |
María Eugenia Parron-Rubio Francisca Perez-Garcia Antonio Gonzalez-Herrera Miguel José Oliveira Maria Dolores Rubio-Cintas Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties Materials concrete slag valorisation cement circular economy |
author_facet |
María Eugenia Parron-Rubio Francisca Perez-Garcia Antonio Gonzalez-Herrera Miguel José Oliveira Maria Dolores Rubio-Cintas |
author_sort |
María Eugenia Parron-Rubio |
title |
Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties |
title_short |
Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties |
title_full |
Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties |
title_fullStr |
Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties |
title_full_unstemmed |
Slag Substitution as a Cementing Material in Concrete: Mechanical, Physical and Environmental Properties |
title_sort |
slag substitution as a cementing material in concrete: mechanical, physical and environmental properties |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-09-01 |
description |
A circular economy is a current tenet that must be implemented in the field of construction. That would imply the study of the possibilities of the use of waste generated, for obtaining materials the used in construction as replacements for the raw material used. One of these possibilities is the substitution of the cement by slag, which contributes to the reduction of cement consumption, decreasing CO<sub>2</sub> emissions, while solving a waste management problem. In the present paper, different types of concrete made by cement substitution with different type of slags have been studied in order to evaluate the properties of these materials. Cement is replaced by slag from different steel mills, both blast furnace and ladle furnace slag. The percentages of slag substitution by cement are 30%, 40% and 50% by weight. Mechanical, physical and environmental properties have been evaluated. Compressive and flexural strength have been analysed as the main mechanical properties. As far as physical properties go, density and porosity tests were be reported and analysed, and from an environmental point of view, a leachate study was performed. It has been found that some kinds of slag (blast furnace slag) are very suitable as substitutes for cement, providing properties above those of the reference concrete, while other types (ladle furnace slag) could be valid for non-structural applications, contributing in both cases to a circular economy. |
topic |
concrete slag valorisation cement circular economy |
url |
https://www.mdpi.com/1996-1944/12/18/2845 |
work_keys_str_mv |
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