انتاج خرسانة عالية الاداءباستخدام انواع مختلفة من البوزولانات المحلية

Abstract

High Performance Concrete (HPC) is considered as one of the most important products known by the construction industries during the last years in the field of producing new and improved types of concrete. This new type of concrete has an essential importance due to its high compressive strength, superior resistance for external salt attack and its low permeability. This paper is concerned with experimental investigations for evaluation of high performance concrete using a new type, locally available pozzolan. The results are compared with that obtained from using well known micro silica. The experimental
work also includes the possibility of activation in order to improve the quality of HPC; the experiments mainly deal with the chemical analysis and the selection for the optimum dosages of additive. The properties of HPC are studied in both fresh and hardened stages. The effect of pozzolan additive on shrinkage was also considered to provide an index for the durability of concrete.