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A platform for research: civil engineering, architecture and urbanism
Degradation mechanisms of Portland cement mortar under seawater attack and drying-wetting cycles
https://orcid.org/0000-0003-3298-2339
https://orcid.org/0000-0002-3440-3591
Highlights The degradation mechanisms of mortar exposed to multiple ion attack and drying-wetting cycle are investigated. The chloride, sulfate and magnesium profiles in marine tidal zone are identified. The effect of multiple ion on the physical damages is investigated. The synergetic effect of multiple ion on microstructure characteristics is addressed.
Abstract This study investigates the degradation mechanisms of Portland cement mortar under multiple salts attack and drying-wetting cycle condition. The results indicate that the sulfate combined with chloride salts retard the chloride diffusion and mitigate the deterioration of mortar under drying-wetting cycles. However, the presence of sulfate, magnesium and chloride ion result in increased consumption of portlandite and causes the decalcification of C-S-H, thus aggravating the degradations. Microstructure analysis shows that the sulfate ion in chloride solution refines the pore structure, while the presence of sulfate and magnesium ion in chloride environment increases the porosity and pore volume, which accelerates the ingress of corrosive ions.
Degradation mechanisms of Portland cement mortar under seawater attack and drying-wetting cycles
https://orcid.org/0000-0003-3298-2339
https://orcid.org/0000-0002-3440-3591
Highlights The degradation mechanisms of mortar exposed to multiple ion attack and drying-wetting cycle are investigated. The chloride, sulfate and magnesium profiles in marine tidal zone are identified. The effect of multiple ion on the physical damages is investigated. The synergetic effect of multiple ion on microstructure characteristics is addressed.
Abstract This study investigates the degradation mechanisms of Portland cement mortar under multiple salts attack and drying-wetting cycle condition. The results indicate that the sulfate combined with chloride salts retard the chloride diffusion and mitigate the deterioration of mortar under drying-wetting cycles. However, the presence of sulfate, magnesium and chloride ion result in increased consumption of portlandite and causes the decalcification of C-S-H, thus aggravating the degradations. Microstructure analysis shows that the sulfate ion in chloride solution refines the pore structure, while the presence of sulfate and magnesium ion in chloride environment increases the porosity and pore volume, which accelerates the ingress of corrosive ions.
Degradation mechanisms of Portland cement mortar under seawater attack and drying-wetting cycles
https://orcid.org/0000-0003-3298-2339
https://orcid.org/0000-0002-3440-3591
Highlights The degradation mechanisms of mortar exposed to multiple ion attack and drying-wetting cycle are investigated. The chloride, sulfate and magnesium profiles in marine tidal zone are identified. The effect of multiple ion on the physical damages is investigated. The synergetic effect of multiple ion on microstructure characteristics is addressed.
Abstract This study investigates the degradation mechanisms of Portland cement mortar under multiple salts attack and drying-wetting cycle condition. The results indicate that the sulfate combined with chloride salts retard the chloride diffusion and mitigate the deterioration of mortar under drying-wetting cycles. However, the presence of sulfate, magnesium and chloride ion result in increased consumption of portlandite and causes the decalcification of C-S-H, thus aggravating the degradations. Microstructure analysis shows that the sulfate ion in chloride solution refines the pore structure, while the presence of sulfate and magnesium ion in chloride environment increases the porosity and pore volume, which accelerates the ingress of corrosive ions.
Degradation mechanisms of Portland cement mortar under seawater attack and drying-wetting cycles
Cheng, Shukai (author) / Shui, Zhonghe (author) / Gao, Xu (author) / Yu, Rui (author) / Sun, Tao (author) / Guo, Cheng (author) / Huang, Yun (author)
2019-09-09
Article (Journal)
Electronic Resource
English
Expansion of Portland Cement mortar due to internal sulfate attack
| Tema Archive | 1997