International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 10 | Oct 2022
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e-ISSN: 2395-0056 p-ISSN: 2395-0072
REPLACEMENT OF FINE AGGREGATES BY BUILDING DEMOLISHED WASTE FOR ESTABLISHING SUSTAINABLE CONCRETE Madhu K.S1, Darshan K.B2, Harshitha G3 Assistant Professor, Civil Engineering, Dr. Ambedkar Institute of Technology, Karnataka, India 2 Student, Civil Engineering, Dr. Ambedkar Institute of Technology, Karnataka, India 3 Student, Civil Engineering, Dr. Ambedkar Institute of Technology, Karnataka, India ----------------------------------------------------------------------***----------------------------------------------------------------------increasing at a faster rate due to developing infrastructure Abstract 1
for the development. Sand has been used as a fine aggregate since ages and is one of the oldest and extensively used construction materials in today’s world. The concrete industry, on the other hand, is one of the major consumers of natural resources. The widely used material in the construction industry is concrete and mortar. When preparing mortar or concrete fine aggregate is an essential ingredient. Sand has a big value in concrete and the construction industry. This increased demand for fine and coarse aggregate is exhausting natural resources and also has a greater impact on construction sector. Hence to mitigate this impact and preserve our natural resources, we must discover a suitable alternative material for natural sand.
Concrete is the most extensively used construction material because of its high compressive strength and flexibility in structural forms as it can be placed and molded into many shapes. The main constituents of concrete are coarse aggregate, fine aggregate, cement and water. Fine aggregate is a prime material used for preparation of mortar and concrete and which plays a major role in mix design. Fine aggregates are weathered and worn-out particles of rocks and are of various grades or sizes depending upon the amount of wearing. River sand is becoming a scarce commodity nowadays. The natural resources due to excessive use are also exhausting very rapidly. Shortage of fine aggregate and coarse aggregate may affect the construction industry directly, therefore there is a need to find an alternative material which can replace the fine aggregate fully or partially so that the damage due to excessive erosion to the environment is prevented. As a result of the rapid infrastructure development, production of construction and demolished waste is massive. This paper deals with the partial replacement of fine aggregates by demolished waste and the reduction of dependency on the natural resources such as river sand and it provides new way of disposing waste brick debris. Different percentage replacement levels of 25% and 50% are determined. Experimental investigation has been carried out to assess the effect of partial replacement of fine aggregates by building demolished debris on the compressive strength and workability of the concrete. These results are compared with the conventional concrete.
Aggregates obtained from sources such as mine tailings, building demolition and other construction debris are known as recycled aggregates. Disposal of this waste have major consequences since it takes up a lot of space and it also pollutes the environment. Building Demolished Waste (BDW) is generally produced by the crushing of concrete rubble, screening then removal of contaminants such as reinforcement, paper, wood, plastics and gypsum. High demand of natural resources due to rapid urbanization and the disposal problem of demolished wastes in developed countries have created opportunities for use of demolished waste in the construction industry.
2. AIM AND OBJECTIVES OF THE STUDY This study aims at investigating the building demolished waste (BDW) as a fine aggregate replacement in concrete mixture. The effect of incorporating BDW as partial fine aggregate replacement from 0 to 50% by weight will be investigating on the fresh and hardened properties of M25 concrete.
Key Words: Building demolished waste, Fine aggregate, Compressive strength, and Conventional concrete.
1. INTRODUCTION Several research have been carried out looking for substitutes for Concrete’s traditional ingredients. Various industrial waste materials like quarry dust, glass powder, ceramic dust and coal dust are used as partial replacement of fine aggregate and assessed the strength parameters and compared the profit percentages after replacement with waste materials.
The specific objectives are as follows: 1. To evaluate and judge the BDW for suitability to be used in concrete as alternative fine aggregate. 2. To substitute the fine aggregate in the concrete by the building demolished waste with percentage replacement ranging from 0% to 50% on the strength criteria of M25 concrete.
India is a developing country, consumption of various materials such as fine aggregate and coarse aggregate is
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