Effect of salt-scaling resistant admixture on freeze-deicing salt resistance and microstructure of concrete

Title: Effect of salt-scaling resistant admixture on freeze-deicing salt resistance and microstructure of concrete
Author(s): Z. Li, H. Ba, Y. Yang
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: 411 - 419
Total Pages: 9
Nb references: 9
Language: English

Abstract: A new type of salt-scaling resistant admixture was adopted to improve the freeze-deicing salt resistance of cement concrete pavement. According to CDF test - Test method for the freeze-thaw resistance of concrete-tests with sodium chloride solution (CDF), the deicer salt scaling resistance and microstructure of three kinds of concrete were investigated in this paper. The results show that after painted with AS sacling-salt resistant admixture, the scaled mass of three kinds of concrete in water-cement ratio (0.40, 0.36 and 0.32) were only 0.09% - 0.07% of those of concrete without AS admixture and all decreased 99% and the loss rate of dynamic elastic modulus of concrete with AS admixture reduce by 79% - 86% of the control concrete after 56 freeze-thaw cycles. SEM observations demonstrated that AS scaling-salt resistant admixture distinctly decrease the formation of cubic NaCl crystals and microcracks inside concrete and on the surface of concrete. Painted with AS anti-icing salt admixture on the surface the ordinary concrete pavement can be applied in cold regions.

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