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。
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.
出处
《土木建筑与环境工程》
CSCD
北大核心
2010年第6期142-146,共5页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金资助项目(50972169)
重庆市科委政关项目(CSTC2009AC7058)
关键词
蒸压养护
固硫灰渣
膨胀特性
抑制机理
autoclaved curing
circulating fluidized bed combustion ash
the expansion characteristics
inhibiting mechanism
作者简介
韦迎春（1973-）,男，博士．主要从事建筑材料研究．（Email）wyc@cqu．edu．cn。
钱觉时（联系人），男．教授．博士生导师．主要从事固体废弃物资源化利用研究，（E—mail）Qianjueshi@163.com
