Electrical resistance of ballastless track concrete used in high-speed railway

Author(s): Huajian Li, Yongjiang Xie, Zhonglai Yi, Yanbin Tan, Lu Yang, Liangwei Lou
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1182 - 1190
Total Pages: 8
Language: English

Abstract: 
The influences of the water-binder ratio, mineral admixture, air content and curing method on the resistance characteristic of concrete using for track slab have been investigated by cyclic voltammetry(CV).The results show that electrical resistivity of concrete increases as the water-binder ratio of concrete decreases. Mineral admixtures can enhance electrical resistivity of concrete significantly. When mineral admixtures dosage is in the range of 20%- 40% of the binder content ,the order of contribution rate to the electrical resistivity of concrete is silica powder＞slag powder＞fly ash. The effect of air content on electrical resistivity of concrete relates with the curing condition. The electrical resistivity of concrete reduces with the increase of air content under standard and water curing condition, however, the air content leads to increase in the electrical resistivity of concrete when cured under nature atmosphere condition.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00