The influence of mineral admixtures on concrete anti-chloride ion permeability with stray current

Title: The influence of mineral admixtures on concrete anti-chloride ion permeability with stray current
Author(s): Q. Ding, J. Geng, S. Hu
Paper category : conference
Book title: The 50-year Teaching and Research Anniversary of Prof. Sun Wei on Advances in Civil Engineering Materials
Editor(s): C. Miao, G. Ye and H. Chen
Print-ISBN: 978-2-35158-098-1
e-ISBN: 978-2-35158-099-8
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 71 - 79
Total Pages: 9
Nb references: 9
Language: English

Abstract: One of the main problems in concrete structures has been chloride ion induced corrosion.
In order to limit chloride ion’s corrosion for rebar, Mineral admixtures, such as fly ash and slag, are used to improve concrete anti-chloride ion permeability. However, for the subway concrete structures, a new form corrosion in reinforced concrete will be observed because of stray current existed. The existence of stray current would speed up chloride ion transportation, so in this work, we researched the influence of mineral admixtures on concrete anti-chloride ion permeability with stray current. Direct current was loaded during test to simulate stray current. A rapid chloride ion permeability test (RCPT) instrument was used to obtain the total coulomb charge of concrete specimens, and chloride ion penetration depths were test by color analysis. Results insulated that stray current not only changes the transport direction of chloride ion into concrete, but also exceeds the transport speed of that, and the using of mineral admixtures is also good for concrete obtaining better anti-chloride ion permeability even stray current existence.

Online publication: 2010-04-22
Publication type : full_text
Public price (Euros): 0.00