Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials
Maintaining the durability of coastal concrete structures while reducing construction costs remains a formidable challenge. Drawing inspiration from the volcanic concrete used by ancient Greeks and Romans, this study explores the feasibility of using waste mullite powder (WMP) with a high alumina co...
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| Format: | Article |
| 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/S2214509525005212 |
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| author | Xiao Sun Zehui Zhou Wenjie He Yudong Bi Yao Wang Hengrui Liu Rui Zhong Hongyan Ma |
| author_facet | Xiao Sun Zehui Zhou Wenjie He Yudong Bi Yao Wang Hengrui Liu Rui Zhong Hongyan Ma |
| author_sort | Xiao Sun |
| collection | DOAJ |
| description | Maintaining the durability of coastal concrete structures while reducing construction costs remains a formidable challenge. Drawing inspiration from the volcanic concrete used by ancient Greeks and Romans, this study explores the feasibility of using waste mullite powder (WMP) with a high alumina content in seawater sea sand concrete to conserve natural resources and enhance durability. The experimental results demonstrate that the incorporation of seawater and WMP exerts detrimental impacts on the flow characteristics and workability of cementitious composites. While the sulfate content in seawater and sea sand can bolster the early strength of sea sand seawater concrete, sulfate attack compromises its long-term strength. Incorporating a small amount of WMP (3 %, 5 %) proved beneficial for compressive strength. To assess the chloride penetration resistance of SSC, the Rapid Iodide Migration test indicated that the alumina in WMP can adsorb and immobilize chloride ions. Microstructure characterizations show that the incorporation of WMP resulting in an increased content of calcium silicate hydrate gel and Friedel's salt in the hydration products. The observed modification substantially augments both the physicochemical binding mechanisms within the cementitious matrix, facilitating improved chloride ion immobilization through synergistic physical entrapment and chemical fixation processes. |
| format | Article |
| id | doaj-art-bc430bfd3d2548b6b69a5ad926418b6f |
| 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-bc430bfd3d2548b6b69a5ad926418b6f2025-08-20T02:14:27ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e0472310.1016/j.cscm.2025.e04723Characterization of the effects of waste mullite powder on seawater sea sand cementitious materialsXiao Sun0Zehui Zhou1Wenjie He2Yudong Bi3Yao Wang4Hengrui Liu5Rui Zhong6Hongyan Ma7College of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing, Jiangsu 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing, Jiangsu 210098, China; Corresponding author.College of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing, Jiangsu 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing, Jiangsu 210098, ChinaCollege of Water Conservancy and Hydropower Engineering, Hohai University, Xikang Road No.1, Nanjing, Jiangsu 210098, ChinaDepartment of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong KongDepartment of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USADepartment of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology, Rolla, MO 65401, USAMaintaining the durability of coastal concrete structures while reducing construction costs remains a formidable challenge. Drawing inspiration from the volcanic concrete used by ancient Greeks and Romans, this study explores the feasibility of using waste mullite powder (WMP) with a high alumina content in seawater sea sand concrete to conserve natural resources and enhance durability. The experimental results demonstrate that the incorporation of seawater and WMP exerts detrimental impacts on the flow characteristics and workability of cementitious composites. While the sulfate content in seawater and sea sand can bolster the early strength of sea sand seawater concrete, sulfate attack compromises its long-term strength. Incorporating a small amount of WMP (3 %, 5 %) proved beneficial for compressive strength. To assess the chloride penetration resistance of SSC, the Rapid Iodide Migration test indicated that the alumina in WMP can adsorb and immobilize chloride ions. Microstructure characterizations show that the incorporation of WMP resulting in an increased content of calcium silicate hydrate gel and Friedel's salt in the hydration products. The observed modification substantially augments both the physicochemical binding mechanisms within the cementitious matrix, facilitating improved chloride ion immobilization through synergistic physical entrapment and chemical fixation processes.http://www.sciencedirect.com/science/article/pii/S2214509525005212Seawater sea sand concreteWaste mullite powderRapid Iodide migrationDurability |
| spellingShingle | Xiao Sun Zehui Zhou Wenjie He Yudong Bi Yao Wang Hengrui Liu Rui Zhong Hongyan Ma Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials Case Studies in Construction Materials Seawater sea sand concrete Waste mullite powder Rapid Iodide migration Durability |
| title | Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| title_full | Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| title_fullStr | Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| title_full_unstemmed | Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| title_short | Characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| title_sort | characterization of the effects of waste mullite powder on seawater sea sand cementitious materials |
| topic | Seawater sea sand concrete Waste mullite powder Rapid Iodide migration Durability |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525005212 |
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