CAJ | 학술논문

利用大宗工业固体废物二水磷石膏和粉煤灰，加入少量水泥、生石灰等原料制备磷石膏基复合胶凝材料，研究了磷石膏的粒径以及pH值对胶凝材料凝结时间、强度的影响规律，采用SEM、XRD等测试方法对胶凝材料的水化产物、微观结构进行分析。结果表明：适当减小磷石膏粒径或增加磷石膏pH值，都会降低磷石膏基胶凝材料的用水量，缩短凝结时间，提高强度，并且通过蒸汽养护，最终可制备出28 d强度超过40 MPa，软化系数接近0.9的胶凝材料。
이용대종공업고체폐물이수린석고화분매회，가입소량수니、생석회등원료제비린석고기복합효응재료，연구료린석고적립경이급pH치대효응재료응결시간、강도적영향규률，채용SEM、XRD등측시방법대효응재료적수화산물、미관결구진행분석。결과표명：괄당감소린석고립경혹증가린석고pH치，도회강저린석고기효응재료적용수량，축단응결시간，제고강도，병차통과증기양호，최종가제비출28 d강도초과40 MPa，연화계수접근0.9적효응재료。
Composite binders based on phosphogypsum(PFLC) were made from phosphogypsum, lfy ash, cement, lime. The inlfuences of the particle size and pH value of phosphogypsum on the setting time and strength of the PFLC were researched. And through XRD, SEM, we studied the hydration products and microstructure on PFLC. The experimental results show that the water dosage, the setting time of PFLC can be reduced and the strength can be improved by appropriately decreasing the particle size or increasing the pH value of phosphorus gypsum.When the particle size of phosphorus gypsum is between 25~20μm and the pH value is greater than 5, compounding lfy ash, cement, lime, by steamcuring, we can prepare composite binders which the compressive strength is higher than 40 MPa at 28 d and the softening coefifcient is close to 0.9.