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In-situ pH value monitoring system of concrete pore solution



Title: In-situ pH value monitoring system of concrete pore solution
Author(s): H. Zhou, J. Liu, J. Sha, R. Mu
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: 1431 - 1438
Total Pages: 8
Nb references: 20
Language: English


Abstract: A new auto-logger system device of Open-circuit potential(OCP) was introduced in this paper, a method of melt-oxidation at high temperature was adopted to fabricate Ir/IrOx pH electrode, the new auto-logger and in-situ pH value monitoring system for use in cement based porous materials has been invented and tested in solution and in concrete blocks. The results show that the Ir/IrOx pH electrode have excellent sensing, which follow the Nernst law with good linearity in a pH range from 2.0 to 14.0, and have a good long-term stability in alkaline medium. The pH values of concrete pore solution measured by in-situ monitoring system is in good quantitative agreement with that determined by pore solution expression method. The In-situ monitoring system can collect the date and supply useful information to durability evaluation of reinforced concrete.


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