Concrete is the civil engineering construction material. Its manufacturing involves the utilization of ingredients like cement, sand, aggregates, water and admixtures. The Demand for the construction material is increasing day by day due to the infrastructural development across the world. During coarse aggregate production greenhouse gases emission are produced which are major concern for global warming and climate change .Excavating of Fine aggregate causing environmental problems such as water retentions in lakes and rivers. Therefore, there is a need to find some alternate or sustainable materials to use concrete mix. Day to day different types of waste materials production is increasing and creating many environmental issues. Making use of these waste materials in manufacturing of concrete will decrease environmental pollution and the cost of concrete. The concrete mixture consists of coarse and fine aggregate. Coarse aggregate is naturally available and factory crushed. Fine aggregate is often obtained from river beds. This became very scarce as the Government of Telangana has imposed ban on the mining of the same due to the environmental hazards. The quality of the river sand normally depends on its source and most of the time it varies quite a lot. As the use of fine aggregate in concrete is more than 30% of the composite, its mechanical properties affect the quality of concrete. The alternative material should be waste materials in the aspects of reduction in environmental load and waste management cost, reduction of production cost of concrete. Hence crushed sand has been identified as a substitute for river sand and coarse aggregate occupy more than 30% in concrete there for coarse aggregate is partially replaced by coconut shell in concrete by this agriculture waste material get reduced and minimize environment problems.

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The composition of World Cement Consumption in the year 2012 is 3,313Million Metric Tons. Among that 7.0 % in India, 57.7 % in China, 9.4% in Developed Countries,25.9% in Other Emerging.

India is the third largest producer of coconut products in the world. Coconut trees are widely cultivated in the southern states of India, especially Kerala. Kerala got its name itself derived from a word,’kera’ meaning coconut tree. Traditional areas of coconut cultivation in India are the states of Kerala, Tamil Nadu, Karnataka, Pondicherry, Andhra Pradesh, Goa, Maharashtra, Odisha, West Bengal and the islands of Lakshadweep and Andaman and Nicobar. The composition of Coconut Production in India in the year 2009 is 10,894,000tonnes.Traditional areas of coconut cultivation are the states of Kerala (45.22%), Tamil Nadu (26.56%), Karnataka (10.85%) and Andhra Pradesh (8.93%). Kerala is densely populated state and most of its population uses coconut or it’s byproducts in their daily activities. Coconut shells thus get accumulated in the mainland without being degraded for around 100 to 120 years. Disposal of these coconut shells is therefore a serious environmental issue. In this juncture, the study on use of coconut shells ash as a substitute or replacement of cement in concrete is gaining importance in terms of possible reduction of waste products in the environment and finding a sustainable alternative for non-renewable natural stone aggregates.

Quarry dust, a byproduct from the crushing process of stones which is available abundantly from rock quarries at low cost in many areas can be an particles less than 4.75 mm. Quarry dusts, which is generally considered as a waste material, causes an environmental load due to disposal problem. Quarry dust being by and large, a waste product, will also reduce environmental impact, if consumed by construction industry in large quantities. Hence, the use of quarry dust as fine aggregate in concrete will reduce not only the demand for natural sand but also reduce environmental problems. Moreover, the incorporation of quarry dust will offset the production cost of concrete and hence, the successful utilization of quarry dust as fine aggregate will turn this waste material into valuable resource.

The most important use of cement is the production of mortar and concrete, which is a combination of cement and an aggregate to form a strong building material that is durable in the face of normal environmental effects. In the present investigation OPC 53 grade cement is used

Sand is naturally occurring granular material composed of finely divided rock and mineral particles. The most common constituent of sand is silicon dioxide, usually in the form of Quartz. Normally fine aggregate is used as fine aggregate for

called coarse aggregate .20mm size aggregate is used

Coconuts are referred to as "man's most useful trees", "king of the tropical flora" and "tree of life". Coconuts or its scientific name cocosnucifera are the most important of cultivated palms and the most widely distributed of all palms. Coconut shells are cheap and readily available in high quantity. The coconuts were broken manually to drain out the water. The coconut half shells were sun-dried for three days. The cleaned coconut shells obtained from vemulawada temple karimnagar were cut into pieces of 20mm size dimensions.

crushing plant, where the rocks are made Processed to form fine particles of less than 4.75 mm. The production of quarry dust Plants. where there are nearly about 14 crushing plants located in Karimnagar.

In the present study we are partially replacing the coarse aggregate by coconut shell a (CS) and fine Aggregate by Quarry Dust for M20 Grade concrete in different percentages 0%, 10%+30%, 20%+30%, 30%+30%, and 40%+30%,are casted 15 no of cubes of 150mm x 150mm x150mm and 15 No 150mm x 300mm cylinder. To achieve the objectives of the investigation the experimental program was planned to cast around 30 No of Specimen. And the specimen were tested under 200 ton compression testing machine to study the compressive strength and split tensile strength of the specimen, The details of the experimental program is shown below.

The concrete mixture proportions for M20 Grade concrete are 1:1.5:3 and water cement ratio 0.5, the specimen were casted using varying CS + QD Ratio. The Coarse aggregate replaced by CS and QT (30%) constant in different Percentage

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Ingredients of mixes are properly mixed so as to produce homogeneous and uniform fresh concrete in macro-scale in order to know its workability using slump test. The results of same test for the conventional concrete and various CS and QT 30% concrete are shown in table 4.1.

This test is done to determine the cube strength of concrete mix prepared. The test is conducted on the 7th day and the 28th day and its observation are listed below in the form of a graph. Compressive strengthvalues with replacement for coarse aggregates by coconut shell with 10%, 20%, 30% and 40% and Fine aggregate by quarry dust with 30%.

4.3 Tensile strength of cylinder: This test is done to determine the tensile strength of the cylinders. The test is conducted on the 7th day and the 28th day and its observation are listed below in the form of a graph. The cylinder is placed in a horizontal position and the load is applied gradually and value is recorded if the cylinder splits into two half or if the cylinder fails while applying the load on it.Tensile strength values with replacement for coarse aggregates by coconut shell with 10%, 20%, 30% and 40% and Fine aggregate by quarry dust with 30%.

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As shown in table No.4.4 The cost of CS 20% +QD 30% was decreased by 16.6% due to replacement of coconut shell 20% and Quarry dust 30% in concrete

• The compressive strength of the CS10%+QD30% and CS20%+QD30% was 24.35N/mm2 and 24.98 N/mm2, Split tensile strength is 3.454N/mm2 and 3.499N/mm2.

• The strength of the concrete increases with increase in percentage of coconut shell up to 20% .and there is gradual decrease at 30% replacement

• The strength of the Coconut shell and Quarry dust CS10%+QD 30% and CS 20%+QD 30% concrete is increasing comparatively with normal concrete

concrete is suitable for construction.

• Moreover it reduces 16.6% cost construction by reducing the cost of coarse and fine aggregate and it also reduces the environmental pollution due to fly ash and seashell.

A.K.Sahu, Sunil kumar and A.K.Sachan, (2003). Crushed stone waste as fine aggregate for concrete, The Indian Concrete Journal, January 2003pp845-847. AmarnathYerramala et al., (October2012) Properties of Concrete with Coconut Shells as Aggregate Replacement, International Journal of Engineering Inventions ISSN: 2278-7461, www.ijeijournal.com Volume 1, Issue 6, pp. 21-31 J. Karthick, T.Rama, N.ManiBharathi, An Experimental Study on Usage of Quarry Rock Dust as Partial Replacement for Sand in Concrete.

Md.Safiuddin, S.N.Raman and M.F.M. Zain, (2007). Utilization of Quarry waste fine Aggregate in concrete mixures, 2007 Journal of Applied sciences research 3 (3) : pp. 202-208. R.Nagalakshmi, (2013). Experimental study on strength characteristics on M25 concrete with partial replacement of cement with fly ash and coarse aggregate with coconut shell, International Journal of Scientific & Engineering Research, Volume 4, Issue1, January-2013. Selvakoodalingam, B. and Palanikumar, M. (2002). “Partial Replacement of Sand in Concrete with Quarry dust”, Proceedings of National Symposium, Karunya Institute of Technology, Coimbatore, pp. 41-43. Yogesh Narayan Sonawane, Chetan Jaiprakash Chitte ,Waste Coconut Shell as a Partial Replacement of Coarse Aggregate in Concrete Mix – An Experimental Study.