CAJ | 학술논문

为考察医疗垃圾焚烧灰电弧炉熔渣用作水泥掺合料的可行性,研究了熔渣的掺入对普通硅酸盐水泥水化特性的影响.结果表明:熔渣具有潜在的活性,适量掺入熔渣能降低水泥浆体中Ca(OH)2含量,增加水化产物C-S-H的数量,改善水泥浆体微观结构;但若熔渣掺量过多,则水泥熟料相对较少,使熔渣的活性难以完全被激发,导致熔渣水泥强度降低;熔渣水泥早期(7 d)抗压强度较低,但后期强度增加明显,掺渣量10%的熔渣水泥60 d的抗压强度达到普通硅酸盐水泥的103%,熔渣的掺量宜控制在10%左右.
위고찰의료랄급분소회전호로용사용작수니참합료적가행성,연구료용사적참입대보통규산염수니수화특성적영향.결과표명:용사구유잠재적활성,괄량참입용사능강저수니장체중Ca(OH)2함량,증가수화산물C-S-H적수량,개선수니장체미관결구;단약용사참량과다,칙수니숙료상대교소,사용사적활성난이완전피격발,도치용사수니강도강저;용사수니조기(7 d)항압강도교저,단후기강도증가명현,참사량10%적용사수니60 d적항압강도체도보통규산염수니적103%,용사적참량의공제재10%좌우.
The influence on the hydration characteristics of ordinary Portland cement(OPC) incorporated with slag was studied in order to investigate the feasibility of the slag from electric arc melting furnace of hospital waste incineration ash as a cement admixture. It is proved that since slag has the potential hydration activity, if ordinary Portland cement was blended with quantitative slag, Ca (OH)2 in cement pastes would be reduced, and C-S-H filling the pore in hydration product would be increased, so microstructure of SBC pastes would be improved. But, if the amount of slag was excessive, the cement clinker would be relatively less. The hydration activity of the slag was impossible to be completely activated, resulting in reduced strength of SBC. The compressive strength of SBC pastes with replacement of 10% at the early curing stages (7 d)was lower, however, it would be apparently higher at later curing stages (60 d), which would reach 103% of the OPC pastes. Therefore, the addition dosage of slag should be about 10% if the slag is used as a partial cement substitute.