摘要
通过分析砂浆裂缝愈合前后的超声波速变化、毛细吸水量和裂缝宽度检测,研究了不同p H溶液(p H=5、7、12)环境下砂浆裂缝的自愈合性能。结果表明,不同p H环境下修复剂的修复效果并不完全相同,在p H=7和p H=12环境下,掺入1%修复剂的试样修复效果最好,声波恢复率最高可达96.03%。在p H=5环境下,不掺修复剂的空白砂浆试样自身修复效果最好,但恢复率要远低于碱性和中性溶液环境。
The self-healing properties of mortar cracks under different p H solutions(5,7,12)and the different polymer repair agents were studied by analyzing the ultrasonic velocity change,capillary water absorption and crack width before and after the mortar crack healing.The effect of the amount of incorporation on the crack repair effect.The results show that the solutions with different p H have erosive effect on mortar samples.Under the alkaline solution and neutral solution environment,the sample with 1%repair agent has the best repair effect,and the sound recovery rate can reach up to 96.03%.The agent has a promoting effect,in the acidic environment,the blank mortar sample has the best self-repairing effect,but the recovery rate is much lower than that of the alkaline and neutral solution environment.
作者
石宝存
张士萍
荣飞亚
顾云凡
彭振康
陈洵安
SHI Baocun;ZHANG Shiping;RONG Feiya;GU Yunfan;PENG Zhenkang;CHEN Xun′an(Department of Architecture Civil Engineering,Nanjing Institute of Technology,Nanjing 211167,China)
出处
《混凝土》
CAS
北大核心
2020年第4期118-124,共7页
Concrete
基金
国家自然科学基金(51678292)
2018年江苏省实践创新训练计划项目(201811276041Y)
南京工程学院大学生科技创新基金“挑战杯”竞赛支撑项目(TZ20180038)。
关键词
pH溶液环境
砂浆
自愈合
裂缝
pH solution environment
mortar
self-healing
crack
