| Autor: |
BOUMEHRAZ, MOHAMMED-AMIN, MELLAS, MEKKI, GOUDJIL, KAMEL, BOUCETTA, FARIDA |
| Předmět: |
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| Zdroj: |
i-Manager's Journal on Civil Engineering; Sep-Nov2019, Vol. 9 Issue 4, p1-8, 8p |
| Abstrakt: |
Chemical attack by aggressive acid sulphuric sulfate is one of the factors responsible for damaging cement pastes. Then sulphuric acid produced reacts with the surface of the concrete converting the cementitious material into ettringite expansive or gypsum. The objective of this research was done by investigating the sanitation networks as a function of type of pipes, concrete used, and waste concentration (as sulfates and hydrogen sulphide composition). In this research, the concrete specimens were immerged in real environment and these results were compared than result of specimens control. In 365 days age, immersion of SRC concrete specimens in wastewater is decreased than specimens control by 7% for tensile strength, which explains the formation of a protective skin the chlorides on the surface for these specimens. At the same age, it was obtained of rapid deterioration after 90 days, the exposure of SRC concrete specimens in H S gas, from 90 to 365 days was registered of reduction to 34% for tensile strength or the 2 formation of expansive ettringite after 90 days of exposure. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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