31-10-2014, 02:19 PM
Abstracts: “In India, infrastructure is given prior importance and it has been vision to make India fully developed up till 2020.But still at present the average compressive strength of concrete is in range 27.6-41.4 MPa.Thus, it is challenging to produce high strength concrete and the only reason for this is presence of air voids.At present to reduce these voids many compacting machines like vibrators are used in field. But, this leads to high noise pollution and annoyance the person working on site.Thus, to eliminate this problem related to compaction , strength and noise , a new concrete called Self Compacting Concrete[SCC] is used. It reduces the voids as it flows under its own weight. The strength and durability of SCC is much higher compared to conventional concrete. It also helps in achieving high quality of surface finishes and becomes sustainable as it saves the energy.The limitation with such concrete is that cement content is high and results in increase of cost. So, our project aims to produce a concrete manufactured by replacing cement with rice husk ash which will result in low cost sustainable concrete. The motto is to obtain a proper mix design of ordinary SCCand then to check fresh properties of this concrete with varying rice husk ash content and to find the optimum RHA content which gives best fresh properties. Further, it is decided to check the mechanical properties [Compressive strength,Split tensile strength] of SCC with optimum RHA content. Theresults obtained from Destructive test arecompared with Non-Destructive tests.