Characteristics of granite dust concrete with M-sand as replacement of fine aggregate composites

Concrete is the most widely used man-made material in existence. It is second to water as the mostconsumed resource on the planet. But, while cement as it is the key ingredient in concrete which has shaped much of our built environment, it also has a massive carbon footprint which leads to emission of greenhouse gases. Granite dust is eco-friendly to the nature and used as an innovative alternative to cement which can be a part of developing high strength concrete. Due to quick growth in the structural industry the necessity for the sand is increased broadly, causing deficiency of suitable river sand. The main aim of this paper is to strengthen the concrete with the fractional replacement of cement by granite dust and replacing the river sand with manufactured sand. The current study is carried out by fractional replacement of cement with granite dust in varying proportions of 0%, 5%, 10%, 15%, and 20% by weight of the cement and fine aggregate is replaced with 50% of manufactured sand for M30 grade of concrete. The specimens of cubes, prisms and cylinders are cast to test for each proportion. The hardened concrete tests such as compressive strength, split tensile strength, flexural strength are conducted. The samples are tested at 7 and 28 days age of concrete. It has been observed that the concrete strength enhances significantly after the use of granite dust. (C) 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the First International conference on Advanced Lightweight Materials and Structures.