Using Acoustic Emission to Characterize Damaging-Healing of Self-healing Cement Matrices by Microcapsules

Author(s): Wenting Li, Zhengwu Jiang and Zhenghong Yang
Paper category: Proceedings
Book title: 3rd International RILEM Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): Changwen Miao, Wei Sun, Jiaping Liu, Huisu Chen, Guang Ye and Klaas van Breugel
Print-ISBN: 978-2-35158-188-9
e-ISBN: 978-2-35158-189-6
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 225-233
Total Pages : 9
Language : English

Abstract: Self-healing of cracks in cementitious composites is of great significance to improve the serviceability of concrete structures. The damaging-healing process of the cement matrices incorporating poly urea formaldehyde (PUF) microcapsules enclosing epoxy resins was in situ detected by acoustic emission (AE) technique, in which passive AE and active AE were combined to reveal the crack formation. The effects of the concentration of microcapsules and the level of pre-damage were investigated. The results revealed the distinguished cracking mechanisms according to the differentiated feature of the signals in terms of the temporal and spectral AE descriptors.

Online publication : 2016
Publication type : full_text
Public price (Euros) : 0.00