CAJ | 학술논문

通过在粉煤灰掺量比例为50%的粉煤灰-水泥胶凝体系中加入Na_2SO_4和碱石灰复合激发进行粉煤灰火山灰活性激发试验,研究粉煤灰-水泥胶凝体系的早期强度,并采用衍射分析和扫描电镜分析硬化浆体的微观结构.研究结果表明:Na_2SO_4和碱石灰复掺具有明显的活性作用.水泥石早期强度显著提高;水泥石中形成了较多的CSH和AFt,未发现AFm生成,说明加入Na_2SO_4和碱石灰共同激发可有效破坏粉煤灰的玻璃微珠外壳及硅铝网络结构,可增强粉煤灰的潜在活性.
통과재분매회참량비례위50%적분매회-수니효응체계중가입Na_2SO_4화감석회복합격발진행분매회화산회활성격발시험,연구분매회-수니효응체계적조기강도,병채용연사분석화소묘전경분석경화장체적미관결구.연구결과표명:Na_2SO_4화감석회복참구유명현적활성작용.수니석조기강도현저제고;수니석중형성료교다적CSH화AFt,미발현AFm생성,설명가입Na_2SO_4화감석회공동격발가유효파배분매회적파리미주외각급규려망락결구,가증강분매회적잠재활성.
Sodium sulphhate and quick lime were added into fly ash and portland cement blend system which the ratio of fly ash was 50% to excite the early activity of fly ash ,the early strength of the blend cement system was studied,and the misrostructure of hardened pastes was analyzed by R-ray diffraction and scanning electron microscope.The result shows that the early strength of cement paste is greatly increased,and more calcium silicate hydrate and ettringite form in the cement paste but hydrated sulphoaluminate is not existent.The hard shells of fly ash are destroyed ,the polymerization degree of silicon-oxygen and aluminum-oxygen is reduced,and the potential activity of fly ash can be enhanced .