| 氧化镁在不同养护条件下水化产物的形貌分析 |
| Morphology of MgO Hydration Products under Different Curing Conditions |
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| 摘要: |
| 关键词: 水镁石 形貌 微观结构 压蒸 养护龄期和温度 |
| 基金项目: |
| Abstract: The morphologies of brucite formed from MgO hydration under different curing conditions were studied. The results showed that there were relations between the morphologies of brucite and its forming conditions. The size of brucite crystals increased with the curing time, and they were fiber-shaped at lower curing temperature and stick-shaped at higher temperature. When MgO was cured in paste with 10 percent cement, the crystal of brucite was fiber-shaped, while cured in paste with 95 percent cement, the crystal was hexaflaggy-shaped, which aggregated and produced some micro-cracks in paste when the curing temperature was increased. At 180 ℃ autoclaving temperature of MgO, the brucite was regular hexaflaggy-shaped crystal; for 216 ℃, it was less irregular. When the paste mixed with 50 percent fly ash, the crystal of brucite was needle-shaped and distributed more evenly, so decreased the deformation and crack of the concrete. |
| Keywords: brucite morphology micro-structure autoclave curing time and temperature |
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| 高培伟,吴胜兴,林萍华,吴中如,唐明述.氧化镁在不同养护条件下水化产物的形貌分析[J].无机化学学报,2007,23(6):1063-1068. |
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