当前位置: X-MOL 学术Cement Concrete Comp. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Autogenous healing performance of internal curing agent-based self-healing cementitious composite
Cement & Concrete Composites ( IF 10.5 ) Pub Date : 2020-09-24 , DOI: 10.1016/j.cemconcomp.2020.103825
Yen-Fang Su , Cihang Huang , HyunGu Jeong , Tommy Nantung , Jan Olek , Prince Baah , Na Lu

In this study, a series of cementitious composite with internal curing agent incorporating ranging from 0% to 30% were prepared to evaluate their autogenous healing performance. The Clinoptilolite Zeolite was utilized as an internal curing compound to replace parts of sand for storing the water inside the cement matrix. The mechanical properties were examined via compressive and splitting tensile tests. To quantify the self-healing behavior of this cementitious composites, the samples were pre-damaged using splitting tensile method and placed in the wet/dry cycle for several days. Two non-destructive testing methods, including resonant frequency and ultrasonic pulse velocity tests, were employed to assess the healing efficiency. The results revealed that the incorporation of zeolite could enhance the compressive strength and the self-healing performance of the proposed cementitious composites. However, if the replacement percentage of zeolite was higher than 15%, the healing efficiency decreased due to the “blocking effect”, which was further investigated by the water absorption test and thermogravimetric analysis (TGA).



中文翻译:

内部固化剂基自修复水泥基复合材料的自生愈合性能

在这项研究中,准备了一系列水泥复合材料,其内部固化剂的掺入量为0%至30%,以评估其自体愈合性能。斜发沸石被用作内部固化剂,以代替用于将水存储在水泥基体内的部分沙子。通过压缩和分裂拉伸试验检查机械性能。为了量化这种水泥基复合材料的自愈性能,使用分体拉伸方法将样品预损坏,并在湿/干循环中放置几天。两种无损检测方法,包括共振频率和超声脉冲速度测试,被用来评估治疗效果。结果表明,沸石的掺入可以提高所提出的水泥基复合材料的抗压强度和自愈性能。但是,如果沸石的置换率高于15%,则由于“粘连效应”而使愈合效率下降,这通过吸水试验和热重分析(TGA)进行了进一步研究。

更新日期:2020-09-29
down
wechat
bug