Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion
This paper investigates the compressive strength loss of wollastonite modified magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) paste after exposure to NaCl freeze-thaw cycles, alternation of dry-wet (water medium and 3 % NaCl medium), H2SO4 and NaOH corrosi...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509520300930 |
| _version_ | 1818724481022033920 |
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| author | Linchun Zhang Ailian Zhang Qian Wang Yan Han Ke Li Xiaojian Gao Zhenyu Tang |
| author_facet | Linchun Zhang Ailian Zhang Qian Wang Yan Han Ke Li Xiaojian Gao Zhenyu Tang |
| author_sort | Linchun Zhang |
| collection | DOAJ |
| description | This paper investigates the compressive strength loss of wollastonite modified magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) paste after exposure to NaCl freeze-thaw cycles, alternation of dry-wet (water medium and 3 % NaCl medium), H2SO4 and NaOH corrosion. The compressive strength loss was applied to characterize the corrosion degree of specimens. Results indicated that the addition of wollastonite has a positive effect on the resistance to NaCl freeze-thaw cycles, alternation of dry-wet, H2SO4 and NaOH corrosion. The number of NaCl freeze-thaw cycles, alternation of dry-wet and the immersing days in H2SO4 and NaOH solutions led to the acceleration of corrosion. NaCl freeze-thaw cycles and alternation of dry-wet had a little corrosive effect on the wollastonite modified magnesium phosphate cement (MPC) pastes. However, wollastonite modified MPC pastes were seriously corroded by the immersion of H2SO4 and NaOH solution. MKPC showed the lower compressive strength loss when the samples were exposed to NaCl freeze-thaw cycles and dry-wet cycles in NaCl solution. While, in the condition of dry-wet cycles in water, MAPC behaved a lower compressive strength loss. Additionally, MAPC performed a higher compressive strength loss in H2SO4 corrosion environment than that of MKPC. On the other hand, MKPC showed better resistance to compressive strength attenuation. |
| first_indexed | 2024-12-17T21:27:06Z |
| format | Article |
| id | doaj.art-44c8980e23a1434b84c2f7c55849c887 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-12-17T21:27:06Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-44c8980e23a1434b84c2f7c55849c8872022-12-21T21:32:00ZengElsevierCase Studies in Construction Materials2214-50952020-12-0113e00421Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosionLinchun Zhang0Ailian Zhang1Qian Wang2Yan Han3Ke Li4Xiaojian Gao5Zhenyu Tang6School of Civil Engineering, Sichuan College of Architectural Technology, 618000, Deyang, ChinaSchool of Civil Engineering, Sichuan College of Architectural Technology, 618000, Deyang, China; Corresponding authors.School of Civil Engineering, Sichuan College of Architectural Technology, 618000, Deyang, ChinaSchool of Civil Engineering, Sichuan College of Architectural Technology, 618000, Deyang, ChinaSchool of Civil Engineering, Sichuan College of Architectural Technology, 618000, Deyang, ChinaSchool of Civil Engineering, Harbin Institute of Technology, 150090, Harbin, China; Corresponding authors.Ningbo University, School of Civil and Environmental Engineering, 315000, Ningbo, ChinaThis paper investigates the compressive strength loss of wollastonite modified magnesium ammonium phosphate cement (MAPC) and magnesium potassium phosphate cement (MKPC) paste after exposure to NaCl freeze-thaw cycles, alternation of dry-wet (water medium and 3 % NaCl medium), H2SO4 and NaOH corrosion. The compressive strength loss was applied to characterize the corrosion degree of specimens. Results indicated that the addition of wollastonite has a positive effect on the resistance to NaCl freeze-thaw cycles, alternation of dry-wet, H2SO4 and NaOH corrosion. The number of NaCl freeze-thaw cycles, alternation of dry-wet and the immersing days in H2SO4 and NaOH solutions led to the acceleration of corrosion. NaCl freeze-thaw cycles and alternation of dry-wet had a little corrosive effect on the wollastonite modified magnesium phosphate cement (MPC) pastes. However, wollastonite modified MPC pastes were seriously corroded by the immersion of H2SO4 and NaOH solution. MKPC showed the lower compressive strength loss when the samples were exposed to NaCl freeze-thaw cycles and dry-wet cycles in NaCl solution. While, in the condition of dry-wet cycles in water, MAPC behaved a lower compressive strength loss. Additionally, MAPC performed a higher compressive strength loss in H2SO4 corrosion environment than that of MKPC. On the other hand, MKPC showed better resistance to compressive strength attenuation.http://www.sciencedirect.com/science/article/pii/S2214509520300930Magnesium phosphate cementFreeze-thaw cyclesAlternation of dry-wetCompressive strengthCorrosion |
| spellingShingle | Linchun Zhang Ailian Zhang Qian Wang Yan Han Ke Li Xiaojian Gao Zhenyu Tang Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion Case Studies in Construction Materials Magnesium phosphate cement Freeze-thaw cycles Alternation of dry-wet Compressive strength Corrosion |
| title | Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion |
| title_full | Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion |
| title_fullStr | Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion |
| title_full_unstemmed | Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion |
| title_short | Corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze-thaw cycles and acid-base corrosion |
| title_sort | corrosion resistance of wollastonite modified magnesium phosphate cement paste exposed to freeze thaw cycles and acid base corrosion |
| topic | Magnesium phosphate cement Freeze-thaw cycles Alternation of dry-wet Compressive strength Corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2214509520300930 |
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