Mechanical Properties of Quaternary Blended Concrete using Nano Silica

Authors- Professor Dr V Kiran Kumar, Professor Dr T Seshadri Sekhar, Professor Dr P Srinivasa Rao

Abstract-Alternatives to cement as binding material is gaining importance due to increased demand of concrete and since we all know it performs better. We can use the other alternatives to it such as SCMs (supplementary cementitious materials) and also some of these supplementary cementitious materials are byproduct/waste products of other industries. These SCMs will be partially replaced which will imparts higher strength to concrete. The use of SCMs which are in finer in size which densifies the pore structure which leads to increased mechanical and durability properties. This research investigates effect of SCMs like Metakaolin (MK), Flyash (FA) and Nano silica (NS) when used in quaternary blended concrete. In this research, three trial mixes were carried out. For these three trials mixes, the compressive strength is tested at 28 days and it was determined that, for the OPC @60%, MK proportion of 10%, FA @ 30%, and NS @ 3% found to offer the increased strength. For the optimum proportion, casted the samples and compared them with control concrete (only OPC), measured the compressive strength, split tensile strength, and flexural strength as well. 2.29 percent was an observed increase in the compressive strength and 8.4 percent was the increase in split tensile strength. On the other hand the flexural strength was increased by 7.27 percent when the comparison was made with the control concrete. Due to the addition of supplementary cementitious materials this increment is possibly attributed and this leads to the denser and refined micro-structure and also due to the compactness of interfacial zone of transition, we possibly witnessed this increment.

DOI: /10.61463/ijset.vol.12.issue3.183