Flexural Study Thruogh Slab Specimens with Fully Replacement of Natural Coarse Aggregate by Cold Bonded Silica Fume Aggregate with Nano Aluminium Oxide

S. RAMESH REDDY
Professor, Dept. of Civil Engineering, Brindavan Institute of Technology & Sciences, Kurnool, A.P and Research Scholar, JNTUA College of Engineering, Anantapuram-515002, A.P., ????????????????� , IN

SK.JANI BASHA
Professor, Dept. of Civil Engineering, Brindavan Institute of Technology & Sciences, Kurnool, A.P and Research Scholar, JNTUA College of Engineering, Anantapuram-515002, A.P., ????????????????� , IN

Dr. V. BHASKAR DESAI
Professor, Dept. of Civil Engineering, Brindavan Institute of Technology & Sciences, Kurnool, A.P and Research Scholar, JNTUA College of Engineering, Anantapuram-515002, A.P., ????????????????� , IN

Keywords: Silica fume aggregates, admixtures, ACC 53grade, Nano aluminum oxide, cube strength, flexural strength of slabs and strain energy stored

Abstract

Solid waste management is becoming an integral part of civilization. With rapid industrialization disposal of waste generated from industries is becoming a problem. Effective utilization of these materials will become a boon for the construction industry. It also mitigates the environmental issues. It is proposed to manufacture cold bonded silica fume aggregates with little amount of cement having density around 1200 kg/m3 which will also serve as light weight aggregate. In the last decade Nanotechnology has been gathering spectacular amount of attention in the field of building materials. The incorporation of Nano sized particles in a small amount to the building materials can influence their properties significantly and it can contribute to the creation of novel and sustainable structures. The strength of concrete can be increased in various ways. Some kind of additives or some innovative materials can be added to increase the strength of concrete. A mix design is done for M20 grade concrete by IS code method. ACC 53 grade cement is used and natural aggregate is fully replaced with cold bonded silica fume aggregates. It is also proposed to replace cement by 11% of its weight with three numbers of pozzolanic materials like silica fume, slag and fly ash in equal proportions along
with varying percentages of Nano aluminum oxide at 0, 0.5, 1 and 1.5 on 11% of cement. Aluminum oxide possesses more pozzolanic action. Because of pozzolanic action, aluminum oxide reacts with free lime during hydration and produces more C-S-H gel. The main aim of this project is to find moment carrying capacity of two way slabs with modified concrete with fixed end condition on all its four sides under UDL along with corresponding cube compressive strength. The concrete made with aluminum oxide gives better results compared to that without aluminum oxide.

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