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- W656149689 abstract "Although it is generally recognized that only the free chloride can damage the steel in concrete it is the total chloride content which is normally used for the assessment for the corrosion risk. Thus it is worth while to have precise information on chloride concentration in the pore solution of hardened cement paste as well as of the factors influencing chloride binding. The investigations showed that the residual chloride concentration in the pore solution of samples prepared with the addition of chloride, made with the same cement and with 1% total chloride content varied on dependency of the w/c-ratio (between 0.4 and 1.0) and the used chloride compound (NaCl or NaCl2) up to a factor of greater than 8. Therefore the total chloride content alone can not be a reliable indicator. Results of different authors show that the Cl/OH-ratio of the pore water is the significant value. Although the Cl/HO-ratio allows without any doubt a much better assessment than the total chloride content alone but it is also not the indicator which gives an absolutely sure information. This because the test results showed that with increasing w/c-ratio both the Cl- and HO-concentration in the pore water of samples with otherwise identical composition decrease continuously, however, at different rates. The Cl/HO-ratio was therefore the higher the lower the w/c-ratio. That would mean that the corrosion risk increases with decreasing w/c-ratio. This is in contradiction to all practical experiences probably because of the influence of other corrosion relevant factors such as oxygen diffusion, moisture, electrical resistivity etc." @default.
- W656149689 created "2016-06-24" @default.
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- W656149689 date "1990-01-01" @default.
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- W656149689 title "CHLORIDE-BINDING IN CEMENT AND THE CL/OH-RATIO OF THE PORE SOLUTION. PROCEEDINGS OF STRATEGIC HIGHWAY RESEARCH PROGRAM AND TRAFFIC SAFETY ON TWO CONTINENTS , GOTHENBURG, SWEDEN, 27-29 SEPTEMBER, 1989. HIGHWAY OPERATIONS. CONCRETE AND STRUCTURES" @default.
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