IJIRST International Journal for Innovative Research in Science & Technology Volume 2 Issue 02 July 2015 ISSN (online):

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1 IJIRST International Journal for Innovative Research in Science & Technology Volume 2 Issue 02 July 2015 ISSN (online): An Experimental Investigation on Various Proportions of Different Mineral Admixtures on Strength Characteristics of High Strength Concrete using R. Lakshmi Rajyam K. Manoj Kumar Department of Civil Engineering Department of Civil Engineering Universal College of Engineering Universal College of Engineering N. P. N Murthy Department of Civil Engineering Universal College of Engineering Abstract High strength concrete replaced manufactured sand is the more advantage in the Construction industry. The main objective of High strength concrete to develop the compressive strength of concrete by replacing Natural sand into Manufacture sand and using admixture. To examine the workability of manufactured sand and using admixture in concrete. To investigate the performance of this concrete terms of its compressive strength and split tensile strength. This paper puts forward the applications of manufactured sand as an attempt towards sustainable development in India. It will help to find viable solution to the declining availability of natural sand to make eco-balance. Manufactured sand is one among such materials to replace river sand, which can be used as an alternative fine aggregate in mortars and concretes. The use of manufactured sand in concrete is gaining momentum these days. The present experimental investigations have been made on concrete using manufactured sand as fine aggregate and observed the effects of crushed manufactured sand on strength properties of concrete. Keywords: Eco Balance, River Sand, Natural Sand I. INTRODUCTION Now-a-days, the Government have put ban on lifting sand from River bed. Important governing factors for HSCs are strength, long term durability, serviceability as determined by crack and deflection control, as well as response to long term environmental effects. Concrete mix design of M60 grade was done according to Indian Standard code Concrete cube, beam and cylindrical specimens were tested for evaluation of compressive and split tensile strength respectively. The concrete exhibits excellent strength with 100% replacement of natural sand, so it can be used in concrete as viable alternative to natural sand. Concrete mixes with different percentages of fly ash as cement replacement material were investigated. Normal concrete lacks required strength and durability which are more often required for large concrete structures such as high rise buildings, bridges and structures under severe exposure condition. Due to booming construction activities natural sand is becoming scarce due to excessive nonscientific methods of mining from the river beds. For these reasons it is necessary to produce a concrete with improved strength and performance, with suitable materials. This research shows the effective utilization of various by products like silica fume, fly ash in High Strength Concrete using manufactured sand. II. METHODOLOGY AND EXPERIMENTAL PROGRAMME The main objectives of this paper are as below: To develop high strength concrete by replacing natural sand into manufactured sand and adding mineral admixtures like fly ash, silica fume. To examine the workability of manufactured sand and using admixture in concrete. To investigate the performance of these concrete terms of its compressive strength, split tensile strength and flexural strength. All rights reserved by 274

2 III. MATERIAL COLLECTION FOR EXPERIMENTAL INVESTIGATION A. River-Sand Good quality natural river sand is readily available in many areas and may be easily obtained and processed. As with the gravels that they often accompany, the sand deposits may not have been laid uniformly, meaning a potential change in quality. Generally fines are classified based on size, i.e.; below 4.75mm is regarded as fine aggregate. The bulk density of river sand was 1860 kg/m 3. B. Fine aggregate used in this research is M- sand. The aggregates whose size is less than 4.75mm. It was collected from RPP READY MIX PLANT, Erode, India. The bulk density of manufactured sand was 1860 kg/m3. Fig. 1: M-SAND & R-SAND Table 1 Specific gravity of Sand Sl. No Description M. Sand River Sand 1 Wt. of pycnometer (w 1 ) kg Wt. of pyc + dry sand (w 2 ) kg Wt. of pyc + dry sand + water (w 3 ) kg Wt. of pyc + water (w 4 ) kg Table 2 Fineness Modulus of M- Sand S.No Aperture size in mm Weight of residue in gms % weight retained Cumulative % wt. retained % of passing mic mic mic Pan Total Fineness Modulus = 416.1/100 = 4.16 Table 3 Fineness Modulus of River Sand Sl.No Aperture size in mm Weight of residue in gms % weight retained Cumulative % wt. retained % of passing mic mic All rights reserved by 275

3 7 150 mic Pan Total Fineness Modulus = 404.9/100 = 4.05 Table - 4 Bulking characteristics of M- Sand Sl.No % of water added Height of wet sand in cm Final volume of wet sand (v 2 ) Difference in volume V = v 2 -v 1 % of bulking (V/v1)x Max % of bulking % of water 10% C. Specimen Specifications The cube size The cylinder size The Beam size The Reinforcement details SI.NO Cube Id 150 mm x 150 mm x 150 mm. 100 mm diameters. 200 mm Height mm x 150 mm x 100 mm. 1No s 10 mm Dia at bottom of beam. 2 No s 8 mm Dia at top of beam. 6 mm Dia stirrups. Table 5 Specimen details Cubes Cylinders Beam Days 1 R-Sand M-Sand Sf-5% Sf-7.5% Sf-10% Fa-10% Fa-20% Fa-30% total total no s All rights reserved by 276

4 IV. RESULTS Fig. 2: Variation of compressive strength with composition. Fig. 3: Variation of Tensile strength with composition. Fig. 4: Load Deflection Behavior for Control RC Beam. All rights reserved by 277

5 Fig. 5: Load Deflection Behavior for M-Sand and Silica Fume RC Beam. Fig. 6: Load Deflection Behavior for M-Sand and Fly Ash RC Beam. Fig. 7: Comparison of Load Carrying Capacity forall Beams. All rights reserved by 278

6 Fig. 8: Load Deflection Behavior for All Beams. V. CONCLUSION In the present scenario sustainable developments there is a dire need for utilizing industrial waste and other alternate materials to presence the environment usage of manufactured sand as an alternate material in the place of river sand is gate prevalent widely across the globe. Utilization of M-sand in the high strength concrete in a confident way require lot of experimental investigations. In the project an attempt has been need to study the strength properties of M60 high strength concrete by adding different proposition of mineral admixture like silica fume and fly ash following are the importance conclusion arrived based on the investigation. A Comprehensive study had been carried out on various journals and books related to the high strength concrete with manufactured sand and various admixtures. The appropriate materials necessary for the preparation of specimens for experimentations have been achieved. The quantity of specimens and the tests to be conducted have been predetermined. The percentage of replacement 0%, 10%, 20%, 30% in fly ash. The maximum strength attains the percentage of 10. The percentage of replacement 0%, 5%, 7.5%, 10% in silica fume. The maximum strength attains the percentage of 5. REFERENCES [1], a Solution and an Alternative to River Sand and In Concrete Manufacturing by Dr.S.Elavenil, et.al, DR. M.G.R. University, Chennai, [2] Effect of replacement of natural sand by manufactured sand on the Properties of cement mortar by Priyanka A. et.al, IIT, Bombay, [3] Experimental Investigation of Concrete with Combined High alumina cement, Silica fume and M-Sand by Dona Maria Joseph, et.al. Karunya University, [4] An experimental investigation on the properties of concrete containing manufactured sand by Priyanka A, et.al, IIT, Bombay, [5] Investigations on flexural behavior of high strength manufactured sand concrete, By C.V. Raghu Pathi, et.al Osmania University, Hyderabad, [6] Study on fly ash concrete using SEM analysis by B.Vidivelli, et.al.annamalai University, All rights reserved by 279