余海跃1,隆 锐1,田 波2,李志远2,罗志辉2,李立辉2,*
余海跃,隆锐,田波,等.负温条件下硅酸盐-铝酸盐-磷酸盐水泥体系水化机理研究[J].混凝土与水泥制品,2023(12):44-49.
YU H Y,LONG R,TIAN B,et al.Study on hydration mechanism of silicate-aluminate-phosphate cement system at negative temperature[J].China Concrete and Cement Products,2023(12):44-49.
负温条件下硅酸盐-铝酸盐-磷酸盐水泥体系水化机理研究
余海跃1,隆 锐1,田 波2,李志远2,罗志辉2,李立辉2,*
余海跃,隆锐,田波,等.负温条件下硅酸盐-铝酸盐-磷酸盐水泥体系水化机理研究[J].混凝土与水泥制品,2023(12):44-49.
YU H Y,LONG R,TIAN B,et al.Study on hydration mechanism of silicate-aluminate-phosphate cement system at negative temperature[J].China Concrete and Cement Products,2023(12):44-49.
摘 要:为了研究在-10 ℃环境下硅酸盐-铝酸盐-磷酸盐水泥体系(SAP体系)的水化反应情况,通过凝结时间、XRD、TG、SEM等测试分析了SAP体系的水化产物和反应机理。结果表明:掺入铝酸盐水泥(CAC)和焦磷酸钠均有利于硅酸盐水泥(OPC)的早期凝结,但不利于其后期强度发展;SAP体系早期的主要水化产物为C-S-H凝胶和NO2-AFm晶体,CAC掺量越多,7 d水化产物生成量越多,试件的抗压强度越高;7~28 d时,CAC掺量为10%的S9A1P体系中Ca(OH)2晶体持续生成,试件28 d抗压强度达到32.4 MPa。
Abstract: In order to study the hydration reaction of the silicate-aluminate-phosphate cement system(SAP system) at -10 ℃, the hydration products and reaction mechanism of the SAP system were analyzed through tests such as setting time, XRD, TG, SEM, etc. The results show that The addition of aluminate cement(CAC) and sodium pyrophosphate is beneficial for the early setting of ordinary Portland cement(OPC), but not conducive to its later strength development. In the SAP system, the main early hydration products are C-S-H gel and NO2-AFm crystal. The more CAC is added, the more hydration products are generated at 7 d, and the higher the compressive strength of the specimen is. At 7~28 d, Ca(OH)2 crystals continue to form in the S9A1P system with a CAC content of 10%, and the compressive strength of the specimen reaches 32.4 MPa at 28 d.
版权所有:中国混凝土与水泥制品网 苏ICP备10086386号 网站建设:中企动力 苏州