Performance of standard and high strength concrete mixes consisting of different combination of supplementary cementing materials based on RCPT
  M. Vijaya Sekhar Reddy and M.C. Nataraja
  Concrete has today very demanding performance requirements. The concrete durability crisis which started to attract public attention forced the engineers to think about the performance of concrete. Proper mix design and careful construction using the best available materials and technologies are necessary to achieve quality concrete structures. In the last decade the use of Supplementary Cementing Materials (SCMs) has become an integral part of high strength and high performance concrete mix design. One of the important changes is the introduction of micro technology for concrete with fine and ultrafine cementitious materials. It is now possible to achieve excellent particle packing and thereby comply with the performance demands both in fresh and in the hardened states. In the present investigation the SCMs used are Flyash, Silica fume, Ground Granulated Blast Furnace Slag and Metakaoline which are recommended by IS 456:2000 to enhance the durability of concrete. This paper presents the performance of M30 to M90 grades of concrete with superplasticizer using Rapid Chloride Permeability Test. Suitable combinations of these SCMs can be used in practice to enhance the chloride resistance of standard to high grade concrete mixes.