A PROPOSAL OF THE MOST APPROPRIATE CONCRETE TO CONSTRUCT HIGH-RISE BUILDINGS (CASE STUDY: A 21-STORY PROJECT IN BABOLSAR)

In order to select the most suitable concrete for the construction of high-rise buildings, method of analytic hierarchy process (AHP) based on expert knowledge has been used. Investigating alternative contain designing structure, costs, quality, time and easy to do. In order to closer examination and get documented results, six types of concrete (with or without vibration) for a 21-storey building in the city of Babolsar is running with normal concrete is studied. Structures with the software ETABS modeling was investigated. These structures, based on listed criteria, the Analytical Hierarchy Process and Expert Choice software was evaluated. The results suggest that By using low weight concrete, and self compact low weight concrete, weight of the building reduced to %12.5 in comparison to normal, and self compact concrete and to 4.9% in comparison to high strength, and self compact high strength concrete. By using high strength, and self compact high strength concrete, the cost of consumed bar is reduced to 18.9% in comparison to normal, and self compact concrete and to 7.8% in comparison to low weight concrete. According to all criteria evaluated in this study, High strength self compacting concrete is primarily importance to construction high-rise is located.