CAJ | 학술논문

研究了原样磷石膏、200℃煅烧磷石膏、800℃煅烧磷石膏制备的磷石膏水泥的力学性能（对应编号分别为：MPC-1、MPC-2和MPC-3），进行了不同改性磷石膏基水泥早期水化放热速率及28 d水化产物的测试分析。结果表明：煅烧磷石膏尤其高温煅烧磷石膏可发挥更好的硫酸盐激发效果，有效提高磷石膏基水泥的强度，尤其是早期强度。800℃煅烧磷石膏水泥MPC-3试样3、28 d强度分别为20.1、44.7 MPa，达到42.5R水泥强度等级要求；煅烧磷石膏基水泥的早期水化进程明显加快，相对MPC-1试样，MPC-2、MPC-3第二放热峰出现时间分别提前约10 h和17 h；磷石膏基水泥的水化产物主要为钙矾石和C-S-H凝胶，高温煅烧磷石膏基水泥水化产物更为密集。
연구료원양린석고、200℃단소린석고、800℃단소린석고제비적린석고수니적역학성능（대응편호분별위：MPC-1、MPC-2화MPC-3），진행료불동개성린석고기수니조기수화방열속솔급28 d수화산물적측시분석。결과표명：단소린석고우기고온단소린석고가발휘경호적류산염격발효과，유효제고린석고기수니적강도，우기시조기강도。800℃단소린석고수니MPC-3시양3、28 d강도분별위20.1、44.7 MPa，체도42.5R수니강도등급요구；단소린석고기수니적조기수화진정명현가쾌，상대MPC-1시양，MPC-2、MPC-3제이방열봉출현시간분별제전약10 h화17 h；린석고기수니적수화산물주요위개반석화C-S-H응효，고온단소린석고기수니수화산물경위밀집。
Influence of phosphogypsum,200 ℃ calcined phosphogypsum and 800 ℃ calcined phosphogypsum on paste strength of modified phosphogypsum-based cement(No.:MPC-1 MPC-2 and MPC-3) were tested;Furthermore,early hydration exothermic rate and 28 d hydration products were systematically compared.Results showed that calcined phosphogypsum ,especially high temperature calcined phosphogypsum can play better stimulate sulfate effect,effectively improve strength of MPC,especially early strength.800 ℃ calcined phosphogypsum-based cement with the compressive strength 20.1 MPa at 3 d and 44.7 MPa at 28 d can meet the standard of Portland ce-ment of 42.5R grade in strengths.Early hydration process of MPC accelerated markedly ,the second exothermic peak of MPC-2 and MPC-3 can respectively advance for 10 h and 17 h relative to MPC-1.Hydration products of phosphogypsum-based cement were mainly ettringite and C-S-H gel,which were more intensive for MPC-2 and MPC-3.