摘要
为探究不同分子结构的醇胺类助磨剂对水泥水化行为及力学性能的影响规律,选取一乙醇二异丙醇胺(EDIPA)、二乙醇单异丙醇胺(DEIPA)和三异丙醇胺(TIPA)三种助磨剂,开展水泥浆体绝热温升试验与砂浆多龄期力学性能测试。试验结果表明,三种助磨剂均可延长水化诱导期并提高放热速率,其中EDIPA组峰值时间提前50min,最大放热速率达0.782℃/min。力学性能方面,0.015%掺量下EDIPA组28d抗压强度提升8.4%,抗折强度提升9.1%,综合性能最优;DEIPA组7d强度增长6.3%、28d强度增长1.3%;TIPA组7d强度增长5.8%、28d强度增长4.3%。掺量提高至0.02%后,强度提升幅度有限。研究成果可为醇胺类助磨剂与水泥绿色低碳发展提供理论支持。
This study investigates the effects of different molecular structures of alkanolamine-based grinding aids on cement hydration behavior and mechanical performance.Three representative grinding aids,namely monoethanol diisopropanolamine(EDIPA),diethanol isopropanolamine(DEIPA),and triisopropanolamine(TIPA),were selected for adiabatic temperature rise testing and multi-age strength evaluation.The results show that all three grinding aids accelerated the hydration process by prolonging the induction period and increasing the heat release rate.Among them,the EDIPA group exhibited the most pronounced effect,with the hydration peak appearing 50 minutes earlier and the maximum heat release rate reaching 0.782℃/min.In terms of mechanical properties,at a dosage of 0.015%,the EDIPA group achieved the highest enhancement,with 28-day compressive and flexural strengths increasing by 8.4%and 9.1%,respectively.The DEIPA group increased by 6.3%at 7d and 1.3%at 28-day.The TIPA group increased by 5.8%at 7-day and the 28-day strength increased by 4.3%.When the dosage was increased to 0.02%,the strength improvement was limited.These findings provide theoretical support for the design of alkanolamine grinding aids and the development of green,low-carbon cement materials.
作者
朱东方
张伟豪
季彩云
范嘉伟
韩垚
ZHU Dongfang;ZHANG Weihao;JI Caiyun;FAN Jiawei;HAN Yao(The Second Construction Co.,Ltd.of CTCE Group,Suzhou 215131;School of Mechanics and Civil Engineering,China University of Mining and Technology(Beijing),Beijing 100083;State Key Laboratory of Green Building Materials,China Building Materials Academy Co.,Ltd.,Beijing 100024)
出处
《中国建材科技》
2025年第4期42-48,共7页
China Building Materials Science & Technology
基金
中国建材集团关键技术攻关“揭榜挂帅”项目(编号:2023SJYL04)。
关键词
水泥水化
助磨剂
醇胺类化合物
分子结构
温升特征
力学性能
绿色制造
cement hydration
grinding aids
alkanolamine compounds
molecular structure
temperature rise characteristics
mechanical performance
green manufacturing
