Rapid estimation of chloride diffusion coefficient in concrete

Autor:	A. M. G. Seneviratne, H. E. H. Ahmed, Martyn Jones, Ravindra K. Dhir
Rok vydání:	1990
Předmět:	Materials science Diffusion Analytical chemistry Halide Building and Construction Applied potential Chloride Ion Close relationship medicine General Materials Science First law Electric potential Civil and Structural Engineering medicine.drug
Zdroj:	Magazine of Concrete Research. 42:177-185
ISSN:	1751-763X 0024-9831
DOI:	10.1680/macr.1990.42.152.177
Popis:	A simple potential dfference (PD) test is developed that can rapidly (within ∼ 10 days) provide a chloride diffusion index. The test utilizes a small applied potential difference (10 V dc) to accelerate the transport of chloride ions through concrete. Conventional nonperturbative, concentration difference (CD) tests have been carried out in parallel, with typical test periods of up to 12 months. Fick’s First Law of Diffusion is applied to calculate a diffusion index from the PD test, and the coefficient of chloride diffusion D from the CD test. A close relationship between these two parameters is shown, allowing D to be estimated from the rapid PD test.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e98248fc9ef11d620f1ec0d5202aaf9 https://doi.org/10.1680/macr.1990.42.152.177 Zobrazit plný text záznamu