摘要
原位增韧材料可以从微纳观层次改善水泥水化产物的特性以及水泥基材料的微观结构,从而提升水泥基材料的韧性。通过整理国内外学者关于原位增韧材料增强水泥基材料宏观性能的研究,比较了纳米材料、聚合物材料和功能性微晶这三类增韧材料对水泥基材料力学性能的影响,包括抗压强度、抗折强度、劈裂抗拉强度以及韧性。此外,分别从水化产物特性、水化产物微结构以及界面过渡区这三个方面出发,对原位增韧材料增强水泥基材料韧性的机理进行了系统地阐述。为后续水泥基材料用原位增韧材料的研发和混凝土韧性提升提供参考。
In-situ toughening materials can improve the properties of cement hydration products and the microstructure of cement-based materials from the micro and nano level,so as to improve the toughness of cement-based materials.Based on the research of domestic and foreign scholars on the macro properties of in-situ toughening materials to strengthen cement-based materials,the effects of nano materials,polymer materials and functional microcrystals on the mechanical properties of cement-based materials were compared,including compressive strength,flexural strength,spliting tensile strength and toughness.In addition,the mechanism of in-situ toughening materials strengthening the toughness of cement-based materials was systematically described from three aspects,the characteristics of hydration products,the microstructure of hydration products and the interface transition zone.It will provide a reference for the research and development of in-situ toughening materials for cement-based materials and the improvement of concrete toughness.
作者
王月
俞佩瑶
安明喆
李良顺
季文玉
WANG Yue;YU Peiyao;AN Mingzhe;LI Liangshun;JI Wenyu(School of Civil Engineering,Bejing Jiaotong University,Bejing 100044,China)
出处
《混凝土》
CAS
北大核心
2024年第7期19-27,共9页
Concrete
基金
国家自然科学基金(51878033,52108189)。
关键词
韧性
纳米材料
聚合物
功能性微晶
拉压比
折压比
toughness
nano material
polymer
functional microcrystal
tensile compression ratio
flexural compression ratio
