期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 318, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.126152
关键词
Steel slag; Chloride penetration; Durability
资金
- Ministry of Science, Technology, Innovation and Communications
- National Council for Scientific and Technological Development (CNPq)
- CAPES
- FAPEMIG
This study demonstrates that concrete produced using steel slag as aggregate and mineral admixture exhibits better performance in resisting chloride attack, with lower chloride penetration depths and higher compressive/tensile strength compared to conventional concrete.
The steel slag is a residue for the steel industry that is already applied in many cement-based composites, although there is a lack of studies on the durability of this material in aggressive environments. This work evaluated the durability against chloride attack of concrete produced using steel slag as aggregate and mineral admixture, called steel slag powder. For comparison purposes, reference concretes using conventional aggregates and commercial mineral admixtures (silica fume and metakaolin) were produced. The concretes produced with steel slag aggregates and steel slag powder had lower chloride penetration depths compared to conventional ones. The steel slag powder presented an ability similar to silica fume of forming Friedel salt. The concrete produced with steel slag aggregates also presented a smaller water absorption and a higher compressive/tensile strength compared to the reference one. In general, this research observed that steel slag concretes are technically feasible options for the construction sector.
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