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- Title
工业废渣-氯氧镁水泥固化工程泥浆 力学特性与微观机制.
- Authors
商武锋
- Abstract
Based on the unconfined compressive strength tests, permeability tests and the scanning electron microscopy tests, the compressive strength, permeability and mechanisms of industrial waste-magnesium oxychloride cement (MOC) solidified slurry pretreated with flocculation-suction and filtration were studied, and the influencing process and inherent mechanism of various factors including flocculant types, curing agent proportioning and curing age upon the mechanical properties of solidified slurry were explored. The results show that the compressive strength and stiffness of solidified slurry tends to increase with an increasing relative proportion of industrial residue to MOC with extended curing age. Under the same conditions, the strength of flocculation-filtration treated slurry with calcium hydroxide is higher than that of flocculation-filtration treated slurry with anionic polyacrylamide. The permeability coefficient of solidified slurry is greatly reduced after solidification, and then decreases with an increase in industrial waste content. The physical filling of industrial waste and the cohesion of calcium silicate hydrate(C -S-H) and magnesium silicate hydrate(M-S -H) are proved as the crucial mechanisms for the strength improvement and permeability reduction of solidified slurry.
- Subjects
CALCIUM silicate hydrate; INDUSTRIAL wastes; SCANNING electron microscopy; COMPRESSIVE strength; CALCIUM hydroxide; POLYACRYLAMIDE; MAGNESIUM silicates
- Publication
China Harbour Engineering, 2023, Vol 43, Issue 4, p28
- ISSN
2095-7874
- Publication type
Article
- DOI
10.7640/zggwjs202304006