Self Healing Behavior of Engineered Cementitious Composites

Title: Self Healing Behavior of Engineered Cementitious Composites
Author(s): S.Z. Qian, J. Zhou, and E. Schlangen
Paper category : conference
Book title: International RILEM Conference on Advances in Construction Materials Through Science and Engineering
Editor(s): Christopher Leung and K.T. WAN
ISBN: 978-2-35158-116-2
e-ISBN: 978-2-35158-117-9
Publisher: RILEM Publications SARL
Publication year: 2011
Pages: 523 - 529
Total Pages: 7
Nb references: 11
Language: English

Abstract: Normal concrete is brittle and tends to crack, resulting in a lack of durability and frequent repair needs. In order to combat this problem, the self-healing behavior of pre-cracked engineered cementitious composites (ECC) was investigated in this paper. Specifically, the influence of precracking time on the self healing behaviour of ECC was studied. Four-point bending tests were used to precrack ECC beams at different age. Two curing regimes were adopted in the study, i.e. water immersion and air curing. For both curing regimes, the magnitude of the deflection capacity after self-healing can recover and even exceed that from virgin samples. While the recovery level of flexural stiffness decreases with the precracking time, no clear trend can be seen for the recovery level of deflection capacity with the precracking time. The addition of nanosized clay in the mixture may have positive effect on the self-healing behavior of ECC even without the presence of external water, i.e. water immersion curing. Further demonstration is needed for this preliminary finding via ESEM and/or NMR.

Online publication: 2011-10-31
Publication type : full_text
Public price (Euros): 0.00