Water flow behaviour across rough fractured surfaces of cement-based materials

Title: Water flow behaviour across rough fractured surfaces of cement-based materials
Author(s): X. Wang, K. Li, M. Ma
Paper category : conference
Book title: International Conference on Microstructure Related Durability of Cementitious Composites
Editor(s): W. Sun, K. van Breugel, C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-065-3
e-ISBN: 978-2-35158-084-4
Publisher: RILEM Publications
Publication year: 2008
Pages: 695 - 701
Total Pages: 7
Nb references: 11
Language: English

Abstract: Water flow in cracks is important for long-term durability of concrete structures. For cement-based materials, water flow behaviour in cracks involves fluid dynamics, mass transfer process between flowing water and fractured surface. This paper reports recent experimental results on water flow rate in single crack of mortar specimens. A permeation device is conceived especially to study water flow in narrow cracks. Different crack opening apertures are obtained by adjusting the fractured surfaces and the roughness of fractured surface is characterized by surface topography scanned by laser profilometer. The rate of water flow through crack is measured under a constant pressure at room temperature for different opening apertures and different fractured roughness. On the basis of available results, the influence of surface roughness is found more important at smaller opening cases and the important decrease of flow rate with time is attributed to both non steady flow behaviour of water and the dissolution-precipitation process between water and fracture surfaces.

Online publication: 2009-06-09
Publication type : full_text
Public price (Euros): 0.00