Influence of Microsilica on the Properties of Ordinary Portland cement and Portland Slag Cement with and without Super plasticizers
B. Damodhara Reddy1, S. Aruna Jyothy2, I. V. Ramana Reddy3
1B.Damodhara Reddy, Department of Civil Engineering and Technology, Chittoor, (Andhra Pradesh), India.
2S. Aruna Jyothy, Department of Civil Engineering , Tirupathi, (Andhra Pradesh), India.
3I.V. Ramana Reddy, Department of Civil Engineering, Tirupathi, (Andhra Pradesh), India.
Manuscript received on January 21, 2013. | Revised Manuscript received on February 09, 2013. | Manuscript published on February 28, 2013. | PP: 610-616 | Volume-2 Issue-3, February 2013.  | Retrieval Number: C1183022313/2013©BEIESP

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Abstract: The development of the construction industry in the global level needs more and more quantity of cement for sustainable growth. But, the production of each tonne of cement clinker releases one tonne of carbondioxide, which affects the earth’s ecosystem. The construction industry is now slowly becoming aware of the environmental issues and other sustainable development issues for cement and concrete industries. It is looking for the ways and means to develop building products, which will increase the life span and quality. In this regard the merits of using certain industrial by products such as fly ash, ground granulated blast furnace slag, microsilica, and rice husk ash have been well recognized by the construction industry. Therefore, it should be obvious that certain scale cement replacement with industrial by products is highly advantageous from the stand point of cost, economy, energy efficiency, durability and overall ecological and environmental benefits. In the present investigation an attempt is made to find various properties based on the experimental results, mathematical models were elaborated to predict the strength of mortar cubes with partial replacement of cement by Microsilica admixture with 5% , 10% and 15%of total powder content by weight both with and without the presence of Superplasticizer. Strength of cubes with Ordinary Portland Cement (OPC) and Portland Slag Cement (PSC), after 3,7,28 ,90 days and 365 days of curing and also durability tests after 60 days, were analysed to evaluate the effect of addition content, the time of curing and the compressive strength changes. The investigation revealed that use of one of such waste materials microsilica which is a waste material obtained from alloy industries can be used for partial replacement of cement, which leads to economy and in addition by utilizing the industrial wastes in the useful manner the environment pollution is also reduced to great extent and which leads to sustainable development. Test results indicate that the use of microsilica has improved the performance of cement in strength as well as in durability aspect.
Keywords: Compressive Strength, Durability, Ordinary Portland cement (OPC), Portland Slag cement (PSC), Microsilica (MS) .