CAJ | 학술논문

固硫灰是循环流化床烧煤技术所产生的废弃物，含有部分烧粘土质矿物，与普通粉煤灰相比其化学组成和性质有一定差异，经过一定加工和配料可以做建筑材料的原材料。但因为固硫灰有其自身特殊性质，如自硬性、火山灰活性和膨胀性等特点，因此在建筑材料领域应用受到一定限制。本文利用SEM微观分析、粒径分析等手段研究了固硫灰的物化特性，同时对固硫灰、粉煤灰、矿粉的活性指数进行分析，并将固硫灰作为矿物掺合料制备混凝土。实验结果表明：固硫灰活性随着粒径减小而增加，与粉煤灰和矿粉复掺会降低体系的活性指数；可以利用固硫灰做矿物掺合料制备混凝土，且其掺量在一定范围内对改善混凝土性能具有一定的积极作用。
고류회시순배류화상소매기술소산생적폐기물，함유부분소점토질광물，여보통분매회상비기화학조성화성질유일정차이，경과일정가공화배료가이주건축재료적원재료。단인위고류회유기자신특수성질，여자경성、화산회활성화팽창성등특점，인차재건축재료영역응용수도일정한제。본문이용SEM미관분석、립경분석등수단연구료고류회적물화특성，동시대고류회、분매회、광분적활성지수진행분석，병장고류회작위광물참합료제비혼응토。실험결과표명：고류회활성수착립경감소이증가，여분매회화광분복참회강저체계적활성지수；가이이용고류회주광물참합료제비혼응토，차기참량재일정범위내대개선혼응토성능구유일정적적겁작용。
Circulating fluidized bed combustion (CFBC) fly ash was the waste that discharged by circulating fluidized bed boiler, which contained certain amount of chainotte minerals. The chemical compositions and physical properties of CFBC fly ashwere distinct with ordinary fly ash, which were suited to be used in construction materials.However, CFBC fly ash has its own special nature, such as self-hardening, pozzolanic activity and expansion characteristics, which restrict the utilization in building materials. In this paper,the physical and chemical properties of CFBC fly ash were characterized by SEM, particle size analysis,etc. And the activity index of CFBCand composite system contained CFBC fly ash, ordinary fly ash and slag were measured. The utilization of CFBC fly ash in concrete has also been discussed. Results showed that the activity index of CFBC fly ash increased with decreasing of the particle size of CFBC fly ash. The activity index would be decreased when ordinary fly ash and slag were mixed. The CFBC fly ash could be used to prepare concrete. And the properties of the prepared concrete would be improved with addition of CFBC fly ash in certain content range.