Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion
In this study, the potential application of slag-fly ash-based geopolymers as stabilizers for soft soil in sulfate erosion areas was investigated to promote environmental protection and waste residue recycling. The changes in the physical and mechanical properties and microstructure characteristics...
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2022-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/15/5114 |
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| author | Guanci Wang Shanling Chen Minmin Xia Weilin Zhong Xuegang Han Biao Luo Mohanad Muayad Sabri Sabri Jiandong Huang |
| author_facet | Guanci Wang Shanling Chen Minmin Xia Weilin Zhong Xuegang Han Biao Luo Mohanad Muayad Sabri Sabri Jiandong Huang |
| author_sort | Guanci Wang |
| collection | DOAJ |
| description | In this study, the potential application of slag-fly ash-based geopolymers as stabilizers for soft soil in sulfate erosion areas was investigated to promote environmental protection and waste residue recycling. The changes in the physical and mechanical properties and microstructure characteristics of cement-stabilized soil/geopolymer-stabilized soil under sulfate erosion were comparatively studied through tests such as appearance change, mass change, strength development, and microscopic examination. The results show that the sulfate resistance of stabilized soil is significantly affected by the stabilizer type. In the sulfate environment, the cement-stabilized soil significantly deteriorates with erosion age due to the expansion stress induced by AFt, while the geopolymer-stabilized soil exhibits excellent sulfate resistance. The slag-fly ash ratio (10:0, 9:1, 8:2 and 7:3) is an important factor affecting the sulfate resistance of geopolymer-stabilized soils, and the preferred value occurs at 9:1 (G-2). When immersed for 90 d, the unconfined compressive strength value of G-2 is 7.13 MPa, and its strength retention coefficient is 86.6%. The N-A-S-H gel formed by the polymerization in the geopolymer contributes to hindering the intrusion of sulfate ions, thereby improving the sulfate resistance of stabilized soil. The research results can provide a reference for technology that stabilizes soil with industrial waste in sulfate erosion areas. |
| first_indexed | 2024-03-09T10:07:46Z |
| format | Article |
| id | doaj.art-b1e098094e154612bc5b88723845d92e |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:07:46Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-b1e098094e154612bc5b88723845d92e2023-12-01T23:00:32ZengMDPI AGMaterials1996-19442022-07-011515511410.3390/ma15155114Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate ErosionGuanci Wang0Shanling Chen1Minmin Xia2Weilin Zhong3Xuegang Han4Biao Luo5Mohanad Muayad Sabri Sabri6Jiandong Huang7Yueyang Road and Bridge Group Co., Ltd., Yueyang 414021, ChinaDepartment of Transportation of Hunan Province, Traffic Manufacturing Cost Management Station, Changsha 410116, ChinaZoomlion Heavy Industry Science & Technology Co., Ltd., Changsha 410013, ChinaYueyang Road and Bridge Group Co., Ltd., Yueyang 414021, ChinaYueyang Road and Bridge Group Co., Ltd., Yueyang 414021, ChinaCollege of Civil Engineering, Xiangtan University, Xiangtan 411105, ChinaPeter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, RussiaPeter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, RussiaIn this study, the potential application of slag-fly ash-based geopolymers as stabilizers for soft soil in sulfate erosion areas was investigated to promote environmental protection and waste residue recycling. The changes in the physical and mechanical properties and microstructure characteristics of cement-stabilized soil/geopolymer-stabilized soil under sulfate erosion were comparatively studied through tests such as appearance change, mass change, strength development, and microscopic examination. The results show that the sulfate resistance of stabilized soil is significantly affected by the stabilizer type. In the sulfate environment, the cement-stabilized soil significantly deteriorates with erosion age due to the expansion stress induced by AFt, while the geopolymer-stabilized soil exhibits excellent sulfate resistance. The slag-fly ash ratio (10:0, 9:1, 8:2 and 7:3) is an important factor affecting the sulfate resistance of geopolymer-stabilized soils, and the preferred value occurs at 9:1 (G-2). When immersed for 90 d, the unconfined compressive strength value of G-2 is 7.13 MPa, and its strength retention coefficient is 86.6%. The N-A-S-H gel formed by the polymerization in the geopolymer contributes to hindering the intrusion of sulfate ions, thereby improving the sulfate resistance of stabilized soil. The research results can provide a reference for technology that stabilizes soil with industrial waste in sulfate erosion areas.https://www.mdpi.com/1996-1944/15/15/5114geopolymer-stabilized soilsulfate erosiondurability degradationstrength developmentmicrostructure |
| spellingShingle | Guanci Wang Shanling Chen Minmin Xia Weilin Zhong Xuegang Han Biao Luo Mohanad Muayad Sabri Sabri Jiandong Huang Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion Materials geopolymer-stabilized soil sulfate erosion durability degradation strength development microstructure |
| title | Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion |
| title_full | Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion |
| title_fullStr | Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion |
| title_full_unstemmed | Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion |
| title_short | Experimental Study on Durability Degradation of Geopolymer-Stabilized Soil under Sulfate Erosion |
| title_sort | experimental study on durability degradation of geopolymer stabilized soil under sulfate erosion |
| topic | geopolymer-stabilized soil sulfate erosion durability degradation strength development microstructure |
| url | https://www.mdpi.com/1996-1944/15/15/5114 |
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