Sunday, October 29, 2017

New M.Tech. Thesis Submitted from civil


Sustainable improvement of cement and concrete industry need to be utilized the industrial and farming waste components. Cement is main ingredient in the production of concrete but cement produce large amount of carbon dioxide gas is noticed and released in environment during the production of cement that is also consequences for global warming and greenhouse effect. Marble powder is obtained from marble industries. Waste marble powder and steel fibers were utilized in this study to improve properties of concrete. This investigation was done to examine the mechanical strength and water absorption properties of waste marble powder and steel fibers utilized in concrete. Various properties of concrete involved are the compressive strength obtained from destructive and Non Destructive test, split tensile strength, flexural strength and water absorption. For experimental investigation six concrete mixes was prepared. In this work, M20 grade of concrete used for entire experimental work. OPC was partially substitute by marble powder at 10% and 15 % by weight of binder. With addition of steel fibers using length of 30mm, aspect ratio 60 and volume fraction 0.5%, 0.75% and 1% . The water/cement (w/c) proportion was varying from 0.43-0.45 in M.P and 0.5 in steel fibers reinforced concrete. To determine compressive strength with destructive and Non Destructive test, 36 cubes were taken of size 150mm length, 150mm breadth and 150mm height cast for testing at 7 and 28 days of curing. To determine splitting tensile strength 18 cylinders of size diameter 150mm and 300mm height were casted for testing at 28 days of curing. To determine flexural strength 18 beams of size length 500mm, breadth 100mm, and height 100mm were casted for testing 28 days of curing. The split tensile strength test was conducted on cylinders; compressive strength test was conducted on cubes and flexural test on beams. Then comparison between  mechanical properties of conventional concrete mix (cubes, cylinders and beams) with M.P (10% and 15%) and SFRC (0.5%-1%) +M.P (10%) was done. The water absorption decreases with the increasing percentages of steel fibers in concrete.