now-a-days, one of the greatest threat to living beings is environmental pollution. It is due to the release of waste materials which are produced in agricultural industries and other industries. These products contain high amount of organic and inorganic compounds which can be used in cement to increase its strength. Rice husk ash and GGBS are one of those industrial waste products which are used as replacement of cement. During the manufacture of concrete large amount pf co2 is released into atmosphere. Rice husk ash is a carbon neutral green product. Replacement of Rice husk ash and GGBS reduces the emission of greenhouse gasses. In many countries there is a need to decreases the cost of construction with increase in demand. So by using these waste products there is decrease in consumption of cement which decreases the cost and also these materials are easily available for people. Research has shown that the replacement of cement with Supplementary Cementing Materials improves the mechanical properties of concrete. In this paper we study the strength and durability of concrete when subjected to different temperatures and atmospheric conditions. It was observed that upto 30% replacement of Rice husk ash and 50% replacement with GGBS in concrete give good increase in strength.