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Paper Information

Journal:   JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TABRIZ)   SUMMER 2008 , Volume 35 , Number 3 (51) CIVIL ENGINEERING; Page(s) 1 To 12.
 
Paper: 

DURABILITY OF REINFORCED CONCRETE CONTAINING DIFFERENT POZZOLANS IN OROUMIA LAKE ENVIRONMENT

 
 
Author(s):  AFSHIN H., KARBALAEI FARAJI H.
 
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Abstract: 

The durability of concrete in corrosive ambient has been a matter of concern for concrete researchers. Natural and artificial pozzolans in replacement with cement have performed very well in concrete structures situated in such environments. In order to investigate the performance of Iranian pozzolans, concrete specimens incorporating Type 2, ordinary cement natural pozzolans (Sabalan tuff, Ansarod pumice) and silica fume were made and stored maintained in simulated Oroumia lake conditions (free air, submerged and wetting-drying) for 6 months. All the considered mixtures have been made with two different water-cement ratios (0.4 & 0.45). Three size of concrete cover (2, 3.5, 5 cm) have been used. Tests such as corrosion potential measurement, electrical resistivity, reinforcement corrosion intensity, carbonation depth, chloride ion concentration and compressive strength were carried out at different ages. Results show that the wetting-drying condition has had a great influence on the durability of concretes. Pozzolanic mixtures have shown better performance in comparison with Type 2 mixtures. Concretes containing silica fume showed the best durability and performance.  The use of 450 kg/m3 cement and water - cement ratio less than 0.4 had a great influence on the protection of concrete against corrosive ions and thus their durability enhancement.

 
Keyword(s): DURABILITY, CONCRETE, ELECTRICAL RESISTIVITY, CHLORIDE PENETRATION, COMPRESSIVE STRENGTH, CARBONATION, CORROSION INTENSITY, POTENTIAL OF CORROSION
 
References: 
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  Persian Abstract Yearly Visit 69
 
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