experimental studies on replacement of fine aggregates by bottom ash for developing high strength...

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ADICHUNCHANAGIRI INSTITUTE OF TECHNOLOGY

DEPARTMENT OF CIVIL ENGINEERINGPRESENTATION ON;

EXPERIMENTAL STUDY ON REPLACEMENT OF FINE

AGGREGATE BY BOTTOM ASH FOR DEVELOPING HIGH

STRENGTH CONCRETEPresented by, KIRAN M SANNAKKI :4AI11CV038 CHANDAN H S :4AI11CV406 MOHAN S :4AI12CV413

Under the guidance of, Mrs. RIKITHA K S Asst Professor Civil Department AIT, Chikmagalur.

Contents

• Introduction• Literature• Objective• Methodology• Reference

INTRODUCTION

• Concrete is a homogenous mixture of cement, coarse, fine aggregates and water.

• Aggregates are the main constituents of concrete.• Aggregates occupy more than 70% of mix.• Generally the river sand is used as fine aggregate in

concrete and it is obtained by mining the sand from river bed.

Challenges Facing due to lack of Fine Aggregates

• Increased sand mining effects the aquifer of the river bed & causes environmental problems.

• All metro and mega cities in India are facing acute shortages of good quality of sand

• Unfavorable Government Policies for fine aggregates • These situations made construction industry, in search

of an alternative to fine aggregates.

BOTTOM ASH• Bottom ash is the fine, solid

mineral residue that results from the burning of coal in boilers

• It is of dark gray color, granular and porous in nature

• Over 70% of electricity generated in India, is by combustion of fossil fuels. In which nearly 61% is produced by coal-fired plants.

DISPOSAL OF BOTTOM ASH

• Disposed off either dry, or wet to an open area• Mixing it with water and pumping into artificial

lagoon or dumping yards.

PROPERTIES OF BOTTOM ASH

LITERATURE REVIEW

• M P Kadam et al ( 2013 ) • K. Nataraj et al• A.Seeni et al• R.S. Bang et al• K. Arumugam et al

OBJECTIVES

• The effect of furnace bottom ash on fresh properties like workability. Hardened properties like compressive strength, split tensile strength

• The natural sand has to be replaced by bottom ash, 0,10,20,30% and metakolin as mineral admixture 10% for the weight cement

METHODOLOGY

MATERIALS SELECTION

BASIC TESTS ON MATERIALS

DESIGN MIX

PREPARATION OF SPECIMENS

CASTING AND CURING OF SPECIMENS

BASIC MATERIALS TESTING

CEMENT• Specific gravity 3.14• Fineness 5%• Normal consistency 32%• Initial setting time 50 minutes• Final setting time 405 minutes

FINE AGGREGATE

• Sieve Analysis Confirming to Zone II• Specific gravity 2.61• Bulk Density 1026 Kg/m³• Water absorption 1.2%

COARSE AGGREGATE

• 20mm down size well graded aggregates are used.

• Specific gravity 2.67• Fineness modulus 7.191• Water absorption 0.6%

ADMIXTURES USED

• Mineral admixture as Metakaolin• Chemical admixture as SP430

MIX DESIGN

• By using IS 10262 : 2009 we obtain the proportion of 1 : 1.81 : 3.15

• Water cement ratio of 0.39

FRESH PROPERTIES OF CONCRETE

Workability properties like,• Slump test• Compaction factor test.

HARDENED PROPERTIES OF CONCRETE

• Compressive strength.• Split tensile strength.

RESULTS AND DISCUSSIONSFRESH PROPERTIES

SERIAL NO GRADE OF CONCRETE

REPLACEMENT OF FINE AGGREGATE (%)

SLUMP (mm)

COMPACTION FACTOR

1

40

0 35 0.9

2 10 24 0.86

3 20 26 0.84

4 30 28 0.82

RESULTS AND DISCUSSIONS ONHARDENED PROPERTIES

compressive strength of cubes

7 days 14 days 28 days

sl no

bottom ash added (%)

Dimensions (mm)

compressive strength (Mpa)

compressive strength (Mpa)

compressive strength (Mpa)

1 0

150 X 150 X150

31.67 39.12 48.77

2 10 29.67 33.68 42.11

3 20 31.58 39.648 49.56

4 30 27.65 34.696 43.37

Split tensile strength of cubes

7 days 14 days 28 days

sl no bottom ash added (%) Dimensions (mm)

Split tensile strength (Mpa)

Split tensile strength (Mpa)

Split tensile strength (Mpa)

1 0

Diameter 10 cmHeight 20 cm

3.5 3.3 5

2 10 2.92 3.18 4.83

3 20 3.31 3.41 5.18

4 30 2.88 3.029 4.59

Reference

• Aggarwal P Civil Engineering Department, National Institute of Technology, Kurukshetra 136119, India. Asian journal of civil engineering (building and housing) vol. 8, no. 1 (2007) pages 49-62

Reference• M P Kadam Department of civil engineering, NDMVP’S

KBTCOE, Gangapur road, Nashik-422013, India 2Department of Applied Mechanics, S V National Institute of Technology, Ichchhanath, Surat-395007, India Email: kadammadhav@yahoo.co.in, chipatil@yahoo.com.

International Journal of Advanced Technology in Civil Engineering, ISSN: 2231 –5721, Volume-2, Issue-1, 2013

PROCUREMENT OF MATERIALS

• Bottom Ash from Adani Power Plant - Udupi• Metakolin from Astra Chemicals ltd - Chennai

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THANK YOU