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Anisuddin, S and Khaleeq, S (2005) Deterioration and rehabilitation of concrete structures in hot and arid regions. In: Khosrowshahi, F (Ed.), Proceedings 21st Annual ARCOM Conference, 7-9 September 2005, London, UK. Association of Researchers in Construction Management, Vol. 1, 441–51.

  • Type: Conference Proceedings
  • Keywords: concrete; deterioration; durability; oman; repair
  • ISBN/ISSN: 0 902896 93 8
  • URL: http://www.arcom.ac.uk/-docs/proceedings/ar2005-0441-0451_Anisuddin_and_Khaleeq.pdf
  • Abstract:
    Reinforced Cement Concrete(RCC) has been in use for over a hundred years and has gained popularity very fast owing to the low cost and ease in availablity of its component materials. Furthermore, as a construction material, it offers great flexibility with respect to shape and size and could match very closely with the imagination of the architects and builders. Deterioration of concrete before it has served its expected life is a global phenomenon and the situation is particularly severe in hot and arid regions of the world where high temperature, humidity and salinity exist. There are many RCC structures built at a very high cost, which have exhibited deterioration of concrete even before they have been put to proper use. Owing to this many of them had to be demolished prematurely. In harsh or aggressive environments, which generally exists in Gulf more particularly in Sultanate of Oman, durable concrete cannot be produced by merely focusing on conventional strength and safety considerations. Here the concrete-environment interaction controls to a large extent the performance of materials and hence the concept of designing for durability is essential. In recent years intensive research in concrete durability has contributed specific information regarding the main parameters that exist in connection with concrete deterioration. Deterioration can be composed of several different mechanisms and design of repair work has to be such that it includes the removal of one or all of the parameters that cause the deterioration. The need for repair of a concrete structure can be due to some or all of the following reasons:1. safety consideration; 2. functional failure; 3.aesthetic reasons. Causes of deterioration throwing light on some of the solutions incorporating design of various structural elements are elucidated. Some of the deterioration mechanisms and their consequences along with the description of materials which should be used as protection measures against harsh and humid environment are also focussed.