STRENGTH ANALYSIS FOR UTILIZATION OF SHAHABAD STONE WASTE IN CONCRETE

Transcription

1 International Journal of Civil Engineering and Technology (IJCIET) Volume 9, Issue 3, March 2018, pp , Article ID: IJCIET_09_03_013 Available online at ISSN Print: and ISSN Online: IAEME Publication Scopus Indexed STRENGTH ANALYSIS FOR UTILIZATION OF SHAHABAD STONE WASTE IN CONCRETE N. Soundarya Research Scholar, Civil Department, Dr. M.G. R. Educational and Research Institute/ University, Maduravoyal, Chennai, Tamil Nadu, India Dr. T. Felix Kala Dean E& T, Civil Department, Dr. M.G. R. Educational and Research Institute/ University, Maduravoyal, Chennai, Tamil Nadu, India ABSTRACT In the view of reuse and recycling of waste, this project has been undertaken. This project aims at the effective use of stone waste to ensure Environmental safety in Shahabad a town in north Karnataka with latitude of 17,1333( N & longitude of 76,933(7655'59.880"E). This area has lot of calcareous stone reserves called Shahabad stones. The dressing of this stone produces huge amount of waste of sizes ranging from 5mm to nearly 150mm large stone wastes. The handling and disposing off of this stone has arisen as a big problem in the last 5 years. This project is basically aimed at aiding the Shahabad town to effectively remove the waste lying around the town by using the waste as a substitute for course aggregate. In this project, course aggregates in concrete is replaced with 20mm size Shahabad stones, Experimental study was done by replacing 10%, 20%, 30% and 40% of course aggregates using Shahabad stones in M25 grade concrete. The results have proven that 30% replacement has achieved highest strength. Hence, this work can be used in the effective elimination of waste in Shahabad region if people use the stones in concrete, this process can also serve to reduce the aggregate transport cost, and hence thereby reducing the total cost in the construction using concrete. Key words: Concrete, Stone Waste, Shahabad Stones, Course Aggregates, Compressive Strength, Tensile Strength, Flexural Strength, Coarse Aggregate. Cite this Article: N. Soundarya and Dr. T. Felix Kala, Strength Analysis for Utilization of Shahabad Stone Waste in Concrete, International Journal of Civil Engineering and Technology, 9(3), 2018, pp editor@iaeme.com

2 Strength Analysis for Utilization of Shahabad Stone Waste in Concrete 1. INTRODUCTION India is very rich in stones reserves. Most notable stones are Kota stones, Cudappah stones and Shahabad stone reserves. This stones are used as tiling stones and also in the north Karnataka region it is being used as roofing material. When this stone is used as a roofing material, has the property of maintaining lower temperatures even in very hot summer times. Shahabad is a small town lying in the north of Karnataka, near the district Gulbarga. Major activity in this town is stone quarrying and during hand dressing of these stones, stone waste of sizes 20mm to big blocks are generated in a huge amount which cannot be disposed off easily. Hence they either dump in the nearby sites or dump it in the river called Kakini which flows near the place. This creates a great environmental pollution problem as the river water gets polluted and also extension of mine sites has also become a problem due to these wastes dumped in the sites already. The town looks to the Government for its help to effectively dispose away this waste. This project aims in effectively utilizing this stone waste in making concrete, where this stone waste can be used as a substitute for coarse aggregate thereby aid the town in proper reuse of the Shahabad stone waste which will reduce the cost of manufacture of conventional concrete. 2. EXPERIMENTAL PROCESS To understand the range in which this concrete gives good strength a preliminary test using course aggregate replacement of 0%, 25%, 50%, 75% and100% replacement was done. The mix design used was M25 grade concrete. The range was found to be around 25%, hence, to get exact percentage and to avoid wastage of Shahabad stones, the following percentages were used to do all other tests, 10%, 20%, 30% & 40%. For the first stage tests for hardened concrete were done. Tests done were Compressive strength, tensile strength and flexural strength were done and results were obtained. MATERIALS USED CEMENT: In this investigation Portland Pozzolona cement of 53 grade was used. FINE AGGREGATES: River sand was used. The size is less than 2.36 mm with specific gravity as 2.44 and fineness modulus was found to be respectively. The percentage of passing is within the limits as per table 4 of IS: and conforming grading zone 2. COURSE AGGREGATES: The coarse aggregate used was 20mm in size, crushed and angular in shape and free from dust. The specific gravity is 2.6 and fineness modulus is respectively and the impact value is 6.15%. The percentage of passing is within the limits as per IS: REPLACEMENT MATERIAL: The replacement material is waste Shahabad stone. It is used as the substitute for coarse aggregate. They have been cut manually to the required size of 20-25mm approximately. Crushed and angular in shape and free from dust were used. Specific gravity 2.0 and impact value 16% editor@iaeme.com

3 N. Soundarya and Dr. T. Felix Kala 3. MIX DESIGN The concrete mix designed was M25 and is designed as per IS and IS CASTING AND CURING Cubes with size 150mm X150mm X150 mm. The samples were dismantled after 24 hrs from casting and kept in a water tank for 7, 14 & 28 days curing. The specimens were casted by varying the percentage of replacement of course aggregate by Shahabad stone waste starting from 0% to 40% with an increment of 10%. 5. TESTS CONDUCTED Tests were done for 10%, 20%, 30% & 40% replacement. Tests done were Compressive strength, tensile strength and flexural strength and results were obtained for various days. 6. RESULTS Compressive, Tensile & Flexural Strength test results for M25 mix Compressive Strength Replacement%\ 0% 10% 20% 30% 40% editor@iaeme.com

4 Strength Analysis for Utilization of Shahabad Stone Waste in Concrete Compressive Strength (MPa) Compressive Strength % 10% 20% 30% 40% Split Tensile Strength Test Replacement%\ 0% 10% 20% 30% 40% Split-Tensile Strength (MPa) Split-Tensile Strength % 10% 20% 30% 40% Flexural Strength(Mpa) Replacement%\ 0% 10% 20% 30% 40% editor@iaeme.com

5 N. Soundarya and Dr. T. Felix Kala Flexural Strength Flexural Strength (Mpa) % 10% 20% 30% 40% 7. DISCUSSIONS From the results, it was found that 30% replacement gives a very good result in all the three tests conducted. Compressive strength showed a value of 34.5 N/mm 2, Tensile strength showed a value of 4.15 N/mm 2 & Flexural strength showed a value of 4.50 N/mm 2. All these indicate that Shahabad stones can be effectively replaced instead of course aggregates and good strength can also be achieved. 8. RECOMMENDATIONS This concrete mix of M25 with 30% replacement of course aggregates using Shahabad stones has given an increase of Compressive strength, Tensile strength and also Flexural strength. This can be used in all places where M25 concrete can be used. This can also be used as a flooring material. 9. FUTURE DIRECTION OF STUDIES Use of a chemical admixture, Thermal properties, Fire resistance, Acid resistance test & Non Destructive Tests. 10. CONCLUSIONS This concrete has its advantages like, Waste Recycling, lower Production Cost & hence results when 30% is replaced as course aggregates have been found fruitful. As this concrete is an idea to help Shahabad people to safely dispose off their solid waste, and at the same time earn profit, This concept will earn familiarity if implemented in real life editor@iaeme.com

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