EFFECT OF DIFFERENT ENVIRONMENTS ON The CORROSION OF REINFORCING STEEL IN CONCRETE
SAMIR AHMED MOHAMED ALI;
Abstract
The aim of this work is to investigate the corrosion of reinforced steel 52 in concretes of two different types of cement in different environments simulating the natural media attacking the concrete structures especially underground.
The study was done on waters of different concentrations of NaCI (I%,
2%, 3.5%, 5%) simulating the different saline environment fluctuated from open lakes through sea water reaching the brackish water of highest salinity. Also, we use other concentrations of 1% ammonium sulphate, and 1% ammonium nitrate and both of them together, simulate the different types of agricultural environments, we also' use the tap water as a datum envirorunent to compromise with it.
The two different types of cement used were the Ordinary Portland Cement
of ordinary alumina and Sea Water Resisting Cement of high alumina. We use three tests to determine the behaviors of every type in every environment. These tests were open circuit potential of steel in the concretes in the environment we determined, the chloride profile on the concrete after two years in the environment and the last test is the rust covering ratio on the surface of the steel rebar through all the period of test (two years).
The results showed the cement of high alumina has the best behavior in sea water and the lowest in sulphate environment. The highest values of potentials and rust with NaCI saline water were at the concentration of3.5% NaCl.
The study was done on waters of different concentrations of NaCI (I%,
2%, 3.5%, 5%) simulating the different saline environment fluctuated from open lakes through sea water reaching the brackish water of highest salinity. Also, we use other concentrations of 1% ammonium sulphate, and 1% ammonium nitrate and both of them together, simulate the different types of agricultural environments, we also' use the tap water as a datum envirorunent to compromise with it.
The two different types of cement used were the Ordinary Portland Cement
of ordinary alumina and Sea Water Resisting Cement of high alumina. We use three tests to determine the behaviors of every type in every environment. These tests were open circuit potential of steel in the concretes in the environment we determined, the chloride profile on the concrete after two years in the environment and the last test is the rust covering ratio on the surface of the steel rebar through all the period of test (two years).
The results showed the cement of high alumina has the best behavior in sea water and the lowest in sulphate environment. The highest values of potentials and rust with NaCI saline water were at the concentration of3.5% NaCl.
Other data
| Title | EFFECT OF DIFFERENT ENVIRONMENTS ON The CORROSION OF REINFORCING STEEL IN CONCRETE | Other Titles | تأثير الأوساط المختلفة على تأكل حديد التسليح فى الخرسانة | Authors | SAMIR AHMED MOHAMED ALI | Keywords | .Corrosion, Concrete; Sea Water Cement, Ordinary Portland Cement Reinforcing Steel in Concrete | Issue Date | 2003 |
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