A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid
This study compares the degradation behavior of the alkali-activated slag/fly ash (AASF) and ordinary Portland cement (OPC) mortars exposed to phosphoric acid with different pH values. The experimental results show that AASF mortars exhibit better resistance than OPC mortars against surface damage,...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-03-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.845349/full |
| _version_ | 1819105220882333696 |
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| author | Jie Ren Jie Ren Lihai Zhang Yingcan Zhu Zhenming Li Rackel San Nicolas |
| author_facet | Jie Ren Jie Ren Lihai Zhang Yingcan Zhu Zhenming Li Rackel San Nicolas |
| author_sort | Jie Ren |
| collection | DOAJ |
| description | This study compares the degradation behavior of the alkali-activated slag/fly ash (AASF) and ordinary Portland cement (OPC) mortars exposed to phosphoric acid with different pH values. The experimental results show that AASF mortars exhibit better resistance than OPC mortars against surface damage, although both systems get white deposits on the surface in phosphoric acid with a relatively high pH level. AASF mortars obtained lower mass loss than OPC mortars in phosphoric acid with pH at 2 and 3. The strength reduction in AASF mortars after immersion in phosphoric acid is more significant than that in OPC mortars. However, total degradation depth of AASF was smaller than that of OPC regardless of the pH of the acid solutions. Based on the experimental data, linear relationships were identified between the slope of degradation depth–mass loss curves and the Al/Si and Ca/Si ratios of the binders. This may indicate a new way to assess the degradation behavior of AASF and OPC based on their chemical compositions. |
| first_indexed | 2024-12-22T02:18:47Z |
| format | Article |
| id | doaj.art-5d4487a3a89e433185fc048c661150cb |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-12-22T02:18:47Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-5d4487a3a89e433185fc048c661150cb2022-12-21T18:42:11ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-03-01910.3389/fmats.2022.845349845349A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric AcidJie Ren0Jie Ren1Lihai Zhang2Yingcan Zhu3Zhenming Li4Rackel San Nicolas5Department of Infrastructure Engineering, the University of Melbourne, Parkville, VIC, AustraliaDepartment of Civil, Environment, and Architectural Engineering, University of Colorado Boulder, Boulder, CO, United StatesDepartment of Infrastructure Engineering, the University of Melbourne, Parkville, VIC, AustraliaCentre for Sustainable Agricultural Systems, University of Southern Queensland, Toowoomba, QLD, AustraliaDepartment of Materials and Environment, Faculty of Civil Engineering and Geoscience, Delft University of Technology, Delft, NetherlandsDepartment of Infrastructure Engineering, the University of Melbourne, Parkville, VIC, AustraliaThis study compares the degradation behavior of the alkali-activated slag/fly ash (AASF) and ordinary Portland cement (OPC) mortars exposed to phosphoric acid with different pH values. The experimental results show that AASF mortars exhibit better resistance than OPC mortars against surface damage, although both systems get white deposits on the surface in phosphoric acid with a relatively high pH level. AASF mortars obtained lower mass loss than OPC mortars in phosphoric acid with pH at 2 and 3. The strength reduction in AASF mortars after immersion in phosphoric acid is more significant than that in OPC mortars. However, total degradation depth of AASF was smaller than that of OPC regardless of the pH of the acid solutions. Based on the experimental data, linear relationships were identified between the slope of degradation depth–mass loss curves and the Al/Si and Ca/Si ratios of the binders. This may indicate a new way to assess the degradation behavior of AASF and OPC based on their chemical compositions.https://www.frontiersin.org/articles/10.3389/fmats.2022.845349/fullalkali-activated materialsPortland cementphosphoric aciddegradationstrength |
| spellingShingle | Jie Ren Jie Ren Lihai Zhang Yingcan Zhu Zhenming Li Rackel San Nicolas A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid Frontiers in Materials alkali-activated materials Portland cement phosphoric acid degradation strength |
| title | A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid |
| title_full | A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid |
| title_fullStr | A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid |
| title_full_unstemmed | A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid |
| title_short | A Comparative Study on the Degradation of Alkali-Activated Slag/Fly Ash and Cement-Based Mortars in Phosphoric Acid |
| title_sort | comparative study on the degradation of alkali activated slag fly ash and cement based mortars in phosphoric acid |
| topic | alkali-activated materials Portland cement phosphoric acid degradation strength |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.845349/full |
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