硅酸盐通报2024，Vol.43Issue(10)：3541-3551,11.
改性醇胺对水泥性能的影响及作用机制
Effect of Modified Alcohol Amine on Properties of Cement and Its Mechanism
摘要
Abstract
In view of the unclear action mechanism of modified alcohol amine in commercial reinforcers,the effects of modified alcohol amine(CSM,CSN and CSO)on setting time and strength of paste were investigated,and the effects of modified alcohol amine on cement hydration process,hydration products and microstructure of paste were investigated by means of hydration heat,cement quantitative XRD and microstructure SEM test,and compared with triisopropanolamine(TIPA).The results show that TIPA,modified alcohol amine all show retarding properties,and CSO has the strongest retarding property.In terms of strength,TIPA improves the strength development of cement paste during the test age,and CSM improves the strength development of cement paste for 7～28 d,and the improvement effect is better than that of TIPA,CSN and CSO have negative effects on strength.In terms of mechanism,the addition of CSM increases the hydration degree of cement mineral phase,optimizes the hydration rate,improves the microstructure of hydration products,promotes the interlacing of C-S-H,Ca(OH)2 and ettringite,and improves the compactness of paste.TIPA promotes the hydration of C4AF.CSN and CSO promote the hydration of C3S and C4AF,but the rapid hydration of mineral phase and compact microstructure can not achieve coordination.In terms of modification measures,compared with amino and hydroxyl modification,TIPA molecular weight modification is more helpful to improve cement hydration process,product distribution structure and promote the development of cement paste strength.关键词
改性醇胺/凝结时间/强度/水化程度/微观结构Key words
modified alcohol amine/setting time/strength/hydration degree/microstructure分类
建筑与水利引用本文复制引用
刘春舵,刘凯,宁朝阳,穆松,杨京,蔡景顺..改性醇胺对水泥性能的影响及作用机制[J].硅酸盐通报,2024,43(10):3541-3551,11.基金项目
国家自然科学基金面上项目(52078240) （52078240）
中海建筑有限公司科研项目(GZ-KL-005/DSC/X069) （GZ-KL-005/DSC/X069）
