Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials
To reutilize secondary aluminum ash and heavy metal sludge, this study investigates the impact of pottery sand content and its pre-wetting state, making by sintering all of the solid waste mentioned above, on the workability, mechanical properties, and leaching content of harmful substances in high-...
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| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952500498X |
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| author | Jianming He Luxin Ji Hongrui Ma Mingfang Ba Lei Wang |
| author_facet | Jianming He Luxin Ji Hongrui Ma Mingfang Ba Lei Wang |
| author_sort | Jianming He |
| collection | DOAJ |
| description | To reutilize secondary aluminum ash and heavy metal sludge, this study investigates the impact of pottery sand content and its pre-wetting state, making by sintering all of the solid waste mentioned above, on the workability, mechanical properties, and leaching content of harmful substances in high-strength concrete, combing Micro-CT, XRD, DTG, FTIR, and SEM to analyze its mechanism. The results show that the incorporation of pottery sand in the high-strength concrete matrix accelerates the cement hydration process and enhances its early strength. The pre-wetted pottery sand with a content of 10 % and the drying pottery sand with a content of 30 % exhibit superior performance, with 3-day compressive strengths increasing by 15.95 % and 14.18 %, respectively, compared to the group without pottery sand. As the content of pottery sand increases, the compressive strength of the specimens first increases and then decreases. When the content is below 20 %, the pre-wetted pottery sand group demonstrates better strength than the drying pottery sand group, the effect is more remarkable while pottery content is beyond 20 %. At the same time, the pre-wetting manner significantly limits the migration and penetration of harmful ions. Microanalysis reveals that the active silicate and aluminate element in the pottery sand consume Ca(OH)2 from the hydration products, generating more calcium silicate hydrate (C-S-H) gel, which refines the pore structure, making it more compact. The maximum pore volume for the reference group, pottery sand group, and pre-wetted pottery sand group were 4.76 mm³ , 2.87 mm³ , and 2.65 mm³ , respectively. |
| format | Article |
| id | doaj-art-8896adb4ff9e477bb4d8ebf46f6293e7 |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-8896adb4ff9e477bb4d8ebf46f6293e72025-08-20T02:13:01ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0470010.1016/j.cscm.2025.e04700Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materialsJianming He0Luxin Ji1Hongrui Ma2Mingfang Ba3Lei Wang4School of Civil & Environment Engineering and Geography Science, Ningbo University, 315211, China; Zhejiang Guangtian component Group Co., Ltd., ChinaSchool of Civil & Environment Engineering and Geography Science, Ningbo University, 315211, ChinaSchool of Civil & Environment Engineering and Geography Science, Ningbo University, 315211, ChinaSchool of Civil & Environment Engineering and Geography Science, Ningbo University, 315211, China; Corresponding author.Zhejiang Guangtian component Group Co., Ltd., ChinaTo reutilize secondary aluminum ash and heavy metal sludge, this study investigates the impact of pottery sand content and its pre-wetting state, making by sintering all of the solid waste mentioned above, on the workability, mechanical properties, and leaching content of harmful substances in high-strength concrete, combing Micro-CT, XRD, DTG, FTIR, and SEM to analyze its mechanism. The results show that the incorporation of pottery sand in the high-strength concrete matrix accelerates the cement hydration process and enhances its early strength. The pre-wetted pottery sand with a content of 10 % and the drying pottery sand with a content of 30 % exhibit superior performance, with 3-day compressive strengths increasing by 15.95 % and 14.18 %, respectively, compared to the group without pottery sand. As the content of pottery sand increases, the compressive strength of the specimens first increases and then decreases. When the content is below 20 %, the pre-wetted pottery sand group demonstrates better strength than the drying pottery sand group, the effect is more remarkable while pottery content is beyond 20 %. At the same time, the pre-wetting manner significantly limits the migration and penetration of harmful ions. Microanalysis reveals that the active silicate and aluminate element in the pottery sand consume Ca(OH)2 from the hydration products, generating more calcium silicate hydrate (C-S-H) gel, which refines the pore structure, making it more compact. The maximum pore volume for the reference group, pottery sand group, and pre-wetted pottery sand group were 4.76 mm³ , 2.87 mm³ , and 2.65 mm³ , respectively.http://www.sciencedirect.com/science/article/pii/S221450952500498XSecondary aluminum ashPottery sandMechanical propertiesHeavy metal leaching |
| spellingShingle | Jianming He Luxin Ji Hongrui Ma Mingfang Ba Lei Wang Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials Case Studies in Construction Materials Secondary aluminum ash Pottery sand Mechanical properties Heavy metal leaching |
| title | Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials |
| title_full | Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials |
| title_fullStr | Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials |
| title_full_unstemmed | Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials |
| title_short | Study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high-strength cement-based materials |
| title_sort | study on the effect of sintered secondary aluminum ash prepared pottery sand on the mechanical properties and ecological performance of high strength cement based materials |
| topic | Secondary aluminum ash Pottery sand Mechanical properties Heavy metal leaching |
| url | http://www.sciencedirect.com/science/article/pii/S221450952500498X |
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