Multiple cracking in textile reinforced concrete and its effect on the transport of water and gases

Title: Multiple cracking in textile reinforced concrete and its effect on the transport of water and gases
Author(s): Matthias Lieboldt, Viktor Mechtcherine
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 107 - 114
Total Pages: 8
Nb references: 3
Language: English

Abstract: This paper presents an experimental study on the influence of characteristic multiple cracking in textile reinforced concrete (TRC) on the transport of water and gases into and through this novel material. The water absorption as well as gas and water permeability tests have been performed on both crack-free and cracked specimens. The main parameters were the fineness and coating of the yarns comprising the textile reinforcement. For permeability testing special equipment was developed to enable measurement of the water and gas transport behaviour of cracked TRC in-situ, under uniaxial tension, and at chosen strain levels. In the case of uncoated textile an increase in the fineness of the yarns as well as the residual strain led to a considerable increase in water absorption. The transport values of the cracked material correlated with the induced strain and the crack characteristics such as the number of cracks, crack width, and cumulative crack length. In addition to the experimental results the paper presents first considerations for modelling of water transport process in TRC.
Furthermore, the effect of self-healing phenomena on the transport properties of TRC was investigated. The self-healing of fine cracks led to a pronounced reduction in the transport rates of water and gas over time.

Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00