IJSRD - International Journal for Scientific Research & Development| Vol. 4, Issue 05, 2016 | ISSN (online): 2321-0613
Sustainable Concrete Made From Recycled Aggregates Pankaj Mishra1 Ram Kumar Choudhary2 1 Highway Engineer 2Resident Engineer 1,2 MSV International INC Abstract— The growing construction sector is responsible to leave behind construction and demolition (C&D) wastes, which has raised the concern about its dumping and adverse effect on environment. Mostly these wastes are used in landfills, but it is not a proper solution to clean this mess. Therefore, the beneficial utilization of these C&D wastes in concrete will not only help in waste management but also in resource management. The present study is carried out by replacing coarse aggregate by recycled aggregate. Coarse aggregate is a major constituent which occupies large volume along with fine aggregate in concrete. But the increasing usage of coarse aggregate in concrete production has alarmed the deterioration of natural resources. In this study, workability and mechanical properties such as compressive and flexural strength, of concrete prepared from recycled aggregate. Obtained results is used to conclude the effect of recycled aggregate in concrete. Key words: Construction And Demolition Wastes; C&D Wastes; Recycled Aggregate; Waste Management; Resource Management I. INTRODUCTION The growing construction sector is every much dependent on a mixture named concrete, a useful material used in most of the sites to develop strength of the structures. Concrete mixture is formed when cement, water, coarse aggregate and fine aggregate is adequately blended according to mix deign or early experience. Each ingredient of concrete plays a vital role in developing the properties of concrete. The increased production of concrete has increased the cost of ingredients, but the major issue is declining natural resources. The natural resources have been source of major material that are used in production of concrete. The excessive mining and excavation for these material has outstretched concern regarding environmental instability. Coarse aggregate is one such material which is mined from natural resources. Extreme mining for aggregate and economical & environmental factors, raised alarm and motivated researchers to replace coarse aggregate with similar characteristic alternative materials such as aggregate from ceramic waste, e-wastes, construction and demolition wastes recycled aggregates, coconut shells etc. Present study focuses on investigating the properties of concrete developed with recycled aggregate. Construction and demolition waste recycled aggregate are counted among best options to replace coarse aggregate. These wastes are produced from demolition of old abandoned building which are risk prone, building demolished to construct new structures and to expand passage for roads, bridges, airports [1]. The waste construction material from collapsed structures or building are also counted for recycled aggregates [1]. Development of new construction artefacts are increasing these untreated wastes, which later deteriorate the land and ground water [2, 3]. Hence, the proper consumption of C&D wastes as recycled aggregate in concrete, would be an effective
solution to control both decreasing natural sources of aggregate and increasing Construction & Demolition wastes [3]. II. LITERATURE SURVEY Dr. Makunza I. J. K. [1], conducted the study on sustainable concrete made from recycled aggregate. The study was focused in determining the quality of recycled aggregate and founding the properties of concrete in both plastic and hardened form. Sonawane T. R. and Pimplikar S. S. [4], investigated the use of recycled aggregate concrete. They studied and compared the properties of recycled fine and coarse aggregate with natural aggregate. The effect on concrete characteristics such as compressive strength, flexural strength and workability, with changes in aggregate properties were also determined. Rahman I. A. et al. [5], assessed the mechanical properties of recycled aggregate concrete. The obtained results were further used to compare with natural aggregate concrete. Recycled aggregate were crushed for size 10 mm, 14 mm and 20 mm. The performance of 10 mm and 14 mm recycled aggregate concrete were similar to natural aggregate concrete. Poon Chi-Sun and Chan D. [6], studied the use of recycled aggregate in concrete in Hong Kong. They focused on the use of brick and ceramic tiles wastes, a part construction and demolition wastes. Mechanical properties of concrete prepared by 20% weight replacement of aggregate with brick and ceramic wastes, was determined. In other type of concrete, the aggregates as well as concrete have been successfully replaced successfully [7], [8]. Limbachiya M. C. et al. [9], studied the use of recycled concrete aggregate in high strength concrete. The paper reports the study on concrete of higher grade such 50 N/mm2 and greater. The engineering and durability performance of higher strength concrete with recycled aggregate is shown similar to concrete with natural aggregate. They also discussed the practical applications of the study. III. EXPERIMENTAL PROGRAM A. Materials 1) Cement Present study is carried out with Ordinary portland cement of grade 43 and specific gravity 3.14. The properties of cement are checked as per IS 8112-2013 [10]. 2) Water Portable water as per IS 456-2000 [11], is used to prepare concrete specimen for the study. The water is ensured to be free from contamination. 3) Fine Aggregate In this study fine aggregate bought from local vendor is used. It was categorized under zone II, specific gravity 2.63
All rights reserved by www.ijsrd.com
1416