Effects of load level on water permeability of concrete

Title: Effects of load level on water permeability of concrete
Author(s): Y. Yang, H. Tong, S. Xu, Y. Han
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: 545 - 552
Total Pages: 8
Nb references: 11
Language: English

Abstract: The permeability of concrete is one of the most important factors that greatly influence durability of concrete, especially permeability of concrete under load which could accelerate the development of cracks. This study focuses on the water permeability of concrete under 4 levels of flexural load (0.7, 0.5, 0.3 and 0 times of crack load fcr). By establishing the relationship between evaporable water content in concrete and electrical resistance, the behavior of water permeation of concrete under flexural loading and certain water pressure was investigated with the self-designed device, and the water permeability coefficients under different load levels were obtained by Darcy’s law. It was found that the flexural loading strongly accelerates the permeation of water, and permeability coefficient increased remarkably with load level when load level exceeded 0.3fcr, especially in the case of lower water-cement ratio.

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