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Corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites
https://orcid.org/0000-0001-6373-5803
Abstract This study investigated the corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites (SH-SFRCs) in a chloride environment. Two types of steel fibers, hooked and twisted, were added (2% by volume) to a high-strength mortar matrix (90 MPa). All the specimens were exposed to cyclic wetting in a 3.5% chloride solution followed by drying. The corrosion resistance of SH-SFRCs was then evaluated by measuring the direct tensile resistance after the chloride cycles. The strain capacity and toughness of all the SH-SFRCs decreased significantly after 105 chloride cycles, whereas a slight reduction was observed in their post-cracking strength. The corrosion resistance of SH-SFRCs after the chloride cycles was strongly dependent on the width of multiple microcracks when the SH-SFRCs were pre-cracked by tensioning until 0.1% tensile strain. The addition of calcium nitrite (CNI) was successful in improving the corrosion resistance of the pre-cracked SH-SFRCs in the chloride environment.
Corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites
https://orcid.org/0000-0001-6373-5803
Abstract This study investigated the corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites (SH-SFRCs) in a chloride environment. Two types of steel fibers, hooked and twisted, were added (2% by volume) to a high-strength mortar matrix (90 MPa). All the specimens were exposed to cyclic wetting in a 3.5% chloride solution followed by drying. The corrosion resistance of SH-SFRCs was then evaluated by measuring the direct tensile resistance after the chloride cycles. The strain capacity and toughness of all the SH-SFRCs decreased significantly after 105 chloride cycles, whereas a slight reduction was observed in their post-cracking strength. The corrosion resistance of SH-SFRCs after the chloride cycles was strongly dependent on the width of multiple microcracks when the SH-SFRCs were pre-cracked by tensioning until 0.1% tensile strain. The addition of calcium nitrite (CNI) was successful in improving the corrosion resistance of the pre-cracked SH-SFRCs in the chloride environment.
Corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites
https://orcid.org/0000-0001-6373-5803
Abstract This study investigated the corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites (SH-SFRCs) in a chloride environment. Two types of steel fibers, hooked and twisted, were added (2% by volume) to a high-strength mortar matrix (90 MPa). All the specimens were exposed to cyclic wetting in a 3.5% chloride solution followed by drying. The corrosion resistance of SH-SFRCs was then evaluated by measuring the direct tensile resistance after the chloride cycles. The strain capacity and toughness of all the SH-SFRCs decreased significantly after 105 chloride cycles, whereas a slight reduction was observed in their post-cracking strength. The corrosion resistance of SH-SFRCs after the chloride cycles was strongly dependent on the width of multiple microcracks when the SH-SFRCs were pre-cracked by tensioning until 0.1% tensile strain. The addition of calcium nitrite (CNI) was successful in improving the corrosion resistance of the pre-cracked SH-SFRCs in the chloride environment.
Corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites
Tran, Ngoc Thanh (author) / Pyo, Sukhoon (author) / Kim, Dong Joo (author)
Cement and Concrete Composites ; 63 ; 17-29
2015-07-28
13 pages
Article (Journal)
Electronic Resource
English
Strain-hardening , Steel fibers , Chloride , Tensile resistance , Corrosion , Calcium nitrite , ASTM , American Society for Testing and Materials , CNI , calcium nitrite , H , hooked (type of high-strength steel fiber) , RILEM , Reunion Internationale des Laboratoires et Experts des Materiaux, Systemes de Construction et Ouvrages (International Union of Laboratories and Experts in Construction Materials, Systems, and Structures) , SFRC , steel-fiber-reinforced concrete , SH-SFRC , strain-hardening steel-fiber-reinforced cementitious composite , T , twisted (type of high-strength steel fiber)
Corrosion resistance of strain-hardening steel-fiber-reinforced cementitious composites
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