摘要
混凝土由于脆性和收缩等先天不足,在工程中使用时极易产生微裂缝与孔隙,这不仅降低了其耐久性,更是其结构老化的根本原因。为此,全球每年都不得不投入大量资金用于混凝土的裂缝修复。渗透结晶材料的出现为混凝土微裂缝修复和减少混凝土内部孔隙提供了新的方法,但目前对于渗透结晶仅停留在掺量和机理的研究,关于渗透结晶的施工方法和愈合环境的研究较少。因此本工作通过混凝土抗压强度实验、超声声速及强度恢复实验探讨了渗透结晶材料的施工方法和愈合环境对混凝土抗压强度性、超声声速和自愈合能力的影响,分析了渗透结晶材料施工方法和愈合环境试件力学性能和自愈合性能提升的原因。试验结果表明,渗透结晶的施工方法和愈合环境能够使混凝土的力学性能、超声声速及自愈合能力得到提高;该材料通过与水泥反应生成晶体,填充混凝土微孔与裂缝,以达到增强致密性和耐久性的效果。
Due to inherent weaknesses such as brittleness and shrinkage,concrete is highly prone to developing micro-cracks and pores when used in engineering applications.This not only reduces its durability but also serves as the root cause of structural aging.Consequently,a considerable amount of funds is invested worldwide every year in concrete crack repair.The emergence of permeable crystalline materials offers a new approach for repairing micro-cracks and reducing internal pores in concrete.However,current research on permeable crystalline materials is primarily limited to studies on mix proportions and mechanisms,with relatively few investigations into application methods and healing environments.Therefore,thiswork explores the effects of the application methods and healing environments of permeable crystalline materials on the compressive strength,ultrasonic pulse velocity,and self-healing capacity of concrete through experiments on compressive strength,ultrasonic pulse velocity,and strength recovery.The reasons for the improvements in mechanical properties and self-healing performance under different application methods and healing environments are analyzed.The experimental results indicate that the application methods and healing environments of permeable crystalline materials can enhance the mechanical properties,ultrasonic pulse velocity,and self-healing capacity of concrete.By reacting with cement,these materials generate crystals that fill micro-pores and cracks in concrete,thereby improving its density and durability.
作者
王俊民
吕冠东
王鹏
WANG Junmin;LYU Guandong;WANG Peng(China Railway Construction Group Co.,Ltd.,Beijing 100043,China;Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China;China Railway Eryuan Kunming Survey and Design Institute Co.,Ltd.,Kunming 650200,China)
出处
《材料导报》
北大核心
2025年第S2期196-200,共5页
Materials Reports
关键词
渗透结晶材料
抗压强度
超声声速
自愈合
强度恢复
permeable crystalline material
compressive strength
ultrasonic pulse velocity
self-healing
strength recovery
