نوع مقاله : مقاله کامل پژوهشی
1 دانشکده مهندسی عمران و سرپرست انستیتو مصالح ساختمانی دانشگاه تهران
2 دانشجوی دکتری مهندسی عمران- سازه، دانشگاه تهران
3 دانشجوی دکتری مهندسی عمران- سازههای دریایی، دانشگاه تهران
عنوان مقاله [English]
Today, concrete structures have a crucial role in the infrastructure of society. The conditions and performance of these structures are important. In recent years, due to corrosion phenomenon, a number of concrete structures in Southern areas of Iran have suffered damage or premature failure. Concrete damage in the chloride environments is the most common failure of reinforced concrete structures and an important problem for civil engineers which today they are faced with the maintenance of them. Recent societal shift toward sustainable consumption and growth applied to civil infrastructure systems requires the construction materials to be designed and used with utmost attention to their durability and long term response. Pozzolanic materials including silica fume, fly ash, slag, and metakaolin have been used in recent decades for developing high performance concrete with improved workability, strength and durability. Metakaolin has been used as a pozzolan for high performance concrete applications. This material is a thermally activated alumino-silicate which is mostly manufactured by calcinations of kaolin clay at the temperature range of 500-850°C .