Tensile properties of preloaded engineered cementitious composites (ECC) self-healed under wet-dry cycles

Author(s): Y. Zhu, S. Diao, J. R. Zhang, Y. Z. Yang, Y. Yao, Z. J. Li
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 845-852
Total Pages: 8
Language : English

Abstract: Engineered cementitious Composites (ECC) is a kind of high performance fiber reinforced cementitious composites, characterized with excellent tensile strain, multiple cracking patterns, and outstanding toughness. In this paper, mechanical properties of preloaded ECC subjected to different self-healing wet-day environments are investigated. Direct tensile test is applied to evaluate the tensile properties of self-healed ECC with different preloaded tensile strain of 1.0%~2.5%. The results show that all self-healed ECC after ten wet-dry cycles can be reloaded. When preloaded strain level is less than 1.5%, the first cracking stress and stiffness of self-healed ECC can recover as well as those of virgin ECC without any damage. Especially as the preloaded tensile strain is 1.0%, the first cracking stress of self-healed ECC can be higher than that of virgin ECC. However, the tensile strain of self-healed ECC exposed to wet-dry cycles is worse than that of virgin specimens, less than 1.5%. Additionally, higher temperature can enhance the first cracking strength of self-healed specimens, but worsen the strain capacity of self-healed ECC.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00