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Classification of concrete is often most feasible means for measuring the durability and has become progressively over the past 20 years. The present study is focused on the capability of concrete to improve its durability when the concrete is subjected to the highly aggressive environments. Existing concrete in cold or coastal regions are affected by chloride penetration under the freeze-thaw cycles. This collective deterioration process quickens the damage advancement of concrete and reduces the service life of the structures. In real life the structure may face numerous deterioration contrivances due to environmental factors surrounded by the concrete. A variety of laboratory test method were used for the determination of durability, which provide number of results, such as rapid chloride penetration value, electrical conductivity, water absorption rate in concrete. For evaluating the durability of concrete, to a single contrivance of deterioration, the techniques were economical and appropriate. For determining the durability of concrete the Ordinary Portland Cement was used.

The effect of fly ash, rice husk ash, metakaolin, ultra-fine slag on the packing density of ternary mix was studied in this paper, using Puntke’s method of particle packing. The addition of these mineral additives, whose particle size is lower than that of the Ordinary Portland Cement, improves the packing density of cement, by filling the voids between the cement grains, which results in increased compressive strength of concrete. The main aim of this research was to increase the packing density by replacement of cement with fine materials. Cement replacement was carried out from 10% to 40% in steps of 5%. Many combinations were tested and results showed that a maximum packing density of 0.586 was achieved at 75% cement content along with fl y ash and ultra-fine slag, without addition of the superplasticizer. Addition of superplasticizer further increased the packing at lower water to binder ratio.

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