| 蒸压养护对固硫灰渣膨胀性能的影响研究 |
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| 引用本文： | 韦迎春,钱觉时,张志伟,王智.蒸压养护对固硫灰渣膨胀性能的影响研究[J].土木建筑与环境工程,2010,32(6):142-146. |
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| 作者姓名： | 韦迎春 钱觉时 张志伟 王智 |
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| 作者单位： | 重庆大学,材料科学与工程学院,重庆,400045;重庆大学,材料科学与工程学院,重庆,400045;重庆大学,化学化工学院,重庆,400045 |
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| 基金项目： | 国家自然科学基金资助项目(50972169)；重庆市科委政关项目（CSTC2009AC7058） |
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| 摘 要： | 循环流化床燃煤固硫灰渣含有较高的SO3和f-CaO,常温下水化时易产生较大的体积膨胀。研究了蒸压养护和自然养护下,2种固硫灰和1种固硫渣的线性膨胀率和强度发展,并用X射线衍射和SEM分析了其水化产物,结果表明:蒸压养护对固硫灰渣的膨胀有显著的抑制作用;蒸压养护后固硫灰渣中无二水石膏、钙矾石生成,在钙组分充足时生成了托贝莫来石;蒸压养护后固硫灰渣的水化产物更加丰富、结晶更完善,从而强度更高。
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| 关 键 词： | 蒸压养护 固硫灰渣 膨胀特性 抑制机理 |
| 收稿时间： | 2010/5/11 0:00:00 |
Expansion Characeriscs of Fluidized Bed Combustion Ashes Under Auoclaved Curing |
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| WEI Ying-chun,QIAN Jue-shi,ZHANG Zhi-wei and WANG Zhi.Expansion Characeriscs of Fluidized Bed Combustion Ashes Under Auoclaved Curing[J].土木建筑与环境工程,2010,32(6):142-146. |
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| Authors: | WEI Ying-chun QIAN Jue-shi ZHANG Zhi-wei and WANG Zhi |
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| Affiliation: | College of Material Science & Engineering, Chongqing University, Chongqing 400045, P.R.China;College of Material Science & Engineering, Chongqing University, Chongqing 400045, P.R.China;College of Material Science & Engineering, Chongqing University, Chongqing 400045, P.R.China;College of Material Science & Engineering;b. College of Chemical Technology, Chongqing University, Chongqing 400045, P.R.China |
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| Abstract: | Containing more SO3 and f-CaO, the fluidized bed combustion (FBC) ash and slag is easier to be in greater volume expansion when it is cured in the normal temperature. The linear expansion rates and the strength development of two FBC ashes and one FBC slag in autoclaved curing and normal curing are studied, and the hydrated products are also analyzed by X-ray diffraction (XRD) and SEM. It is shown that the expansion of FBC ashes is significantly inhibited by autoclaved curing. Also, there is no gypsum and ettringite but some tobermorite in the hydrated products which become richer and better crystallization,resuleing in the significant increase of the sevength. |
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| Keywords: | autoclaved curing circulating fluidized bed combustion ash the expansion characteristics inhibiting mechanism |
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