ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The study of chemical and electrochemical equilibria between concrete or embedded steel and ionic species in concrete's pore solution requires the knowledge of ion activities (free concentrations in solution). Recently, a method has been developed for measuring chloride-ion (Cl−) activities in simplified synthetic concrete pore solutions using calibrated Cl− selective electrodes. Cl− activities also have been calculated using Pitzer's specific ionic-interaction model. In this work, we have applied both of these methods, experimental and theoretical, for obtaining Cl− activities in solutions obtained using the technique of “pore pressing,” which has been applied to cement pastes with varied admixed Cl− concentrations. A reasonably good agreement has been found between experimental and theoretical results, but the presence of hydroxide ions in these highly alkaline electrolytes interferes with the measurements at low Cl− concentrations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1151-2916.2001.tb01128.x
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