EFFECT OF FLY ASH AND STONE DUST ON THE STRENGTH CHARACTERISTICS OF EXPANSIVE SOIL Guide Name: Prof. V.A.Salimath Group Member: Kolekar Saurabh .V Rathod Suyog .S Tarke Sameer .R Bhusnur Shoaib

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EFFECT OF FLY ASH AND STONE DUST ON THE STRENGTH CHARACTERISTICS OF EXPANSIVE SOIL Guide Name: Prof. V.A.Salimath Group Member: Kolekar Saurabh .V Rathod Suyog .S Tarke Sameer .R Bhusnur Shoaib Khemkar Mukund.G Hotkar Amar .T

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CONTENTS

Introduction Problem Statement Objectives Material Methodology Results Conclusion

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INTRODUCTION

Aim at evaluating the possibility of utilizing fly ash and stone dust in the improvement of strength of Expansive Soil. Expansive Soil possesses low strength and undergo excessive volume changes , making their use in constructions very difficult. These soils cause more extensive damage than even natural disaster. Hence we must increase the strength of Expansive Soil with using of fly ash and stone dust.

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PROBLEM STATEMENT

Expansive Soil(Black cotton soils) are weak soils exhibiting high swell & shrinkage characteristics when exposed to changes in moisture content & hence have been found to be most troublesome from engineering considerations. To improve the properties of black cotton soil to avoid damage to the structures improve the life of roads.

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PROJECT OBJECTIVES

Identifying the type of the soil Analyzing the properties of the soil at the area Finding optimum moisture content and maximum dry density Comparing the properties with and without fly ash and stone dust. Finding the optimum dosage of fly ash and stone dust

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MATERIALS Black Cotton Soil Fly Ash Stone Dust

HOW TO AVOID FOUNDATION FAILURE IN BLACK COTTON SOIL? - CivilBlog.Org

HOW TO AVOID FOUNDATION FAILURE IN BLACK COTTON SOIL? - CivilBlog.Org

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METHODOLOGY Fly ash and quarry dust in the proportion of 1:2 added to a Black Cotton soil up to 60% of its dry mass. Fly ash added were 0 to 20% at an increment of 5% quarry dust 0 to 40% at an increment of 10% by dry mass of the Black Cotton soil.

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INDEX AND ENGINEERING PROPERTIES OF STONE DUST

Properties of Stone Dust Value Index Properties Liquid Limit (%) NIL Plastic Limit (%) NP (Non-Plastic) Plasticity Index NP (Non-Plastic) Specific Gravity 2.58 Engineering Properties Optimum Moisture Content (%) 11.50% Maximum Dry Density (kN/m3) 15.4 California Bearing Ratio (CBR) 7.80%

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INDEX AND ENGINEERING PROPERTIES OF FLY ASH

Properties of Fly Ash Value Index Properties Liquid Limit (%) 31% Plastic Limit (%) Non-Plastic Plasticity Index Non-Plastic Specific Gravity 1.90% Engineering Properties Optimum Moisture Content (%) 21% Maximum Dry Density ( kN /m3) 12.5

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INDEX PROPERTIES OF BLACK COTTON SOIL

S.N Properties Limit Result Is Code 1 Classification CH-MH CH 2720(PART 4):1985 2 Liquid limit 50-120% 55.3% 2720(PART5):1985 3 Plastic limit 20-60% 22% 2720(PART5):1985 4 Plasticity index 30-60% 33.3% - 5 Optimum moisture content 20-35% 24% 2720(PART8):1983 6 Maximum dry density 1300-1750 Kg/M 3 1540 Kg/M 3 2720(PART8):1983 7 Soaked CBR 2.68% 2.80% 2720(PART16):1987 8 Free swell 40-180% 76.92% 2720(PART40):1977 9 Specific gravity 2.6-2.75 2.61 2720(PART3):1980

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BEHAVIOR OF SOIL MODIFIED WITH STONE DUST AND FLY ASH

Total % of Fly ash and Stone Dust  Liquid Limit Value  Plastic Limit   Plastic Index  0(0% Fly ash+0% Stone Dust)  55.3  22  33.3  15(5% Fly ash+10% Stone Dust)  52  20.42  31.6  30(10% Fly ash+20% Stone Dust)  48  19.5  28.5  45(15% Fly ash+30% Stone Dust)  43  18.88  24.12  60(20% Fly ash+40% Stone Dust)  40  17.31  22.7

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LL, PL and PI Curve with Different % of Fly ash and Stone Dust

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MDD AND OMC VALUES OF MODIFIED PROCTOR COMPACTION TEST

% of Fly ash+% of Stone Dust  Total % of Fly ash and Stone Dust  MDD (g/cc)  OMC (%)  0% Fly ash+0% Stone Dust  0  1.54  24  5% Fly ash+10% Stone Dust  15  1.61  21.9  10% Fly ash+20% Stone Dust  30  1.65  19.8  15% Fly ash+30% Stone Dust  45  1.68  19.2  20% Fly ash+40% Stone Dust  60  1.65  17.8

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MDD Curve with Different % of Fly ash and Stone Dust

OMC Curve with Different % of Fly ash and Stone Dust

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1.70 1.65 "1.55 ?1.50 1.40 10 15 20 Water Content (%) 25 30

MODIFIED PROCTOR COMPACTION CURVE WITH DIFFERENT % OF FLY ASH AND STONE DUST

Decrease in the OMC (Optimum Moisture Content) with the addition of different percentage of Fly ash and Stone Dust leads to decrease in swelling of the soil and MDD (Maximum Dry Density) of the soil increases.

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% of Fly ash and Stone Dust  Total % of Fly ash and Stone Dust  CBR (%)  0% Fly ash+0% Stone Dust  0  2.84  5% Fly ash+10% Stone Dust  15  3.30  10% Fly ash+20% Stone Dust  30  4.18  15% Fly ash+30% Stone Dust  45  4.45  20% Fly ash+40% Stone Dust  60  4.30

CALIFORNIA BEARING RATIO (SOAKED) TEST RESULTS WITH DIFFERENT % OF FLY ASH AND STONE DUST

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California Bearing Ratio (Soaked) Curve with Different % of Fly ash and Stone Dust

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CONCLUSION

The Expansive Soil sample has been categorized as well graded soil. There is substantial decrease in Atterberg's limits value such as LL, PL & PI. The Maximum Dry Density (MDD) and CBR values increases gradually with the increase in FA and SD content till its valuation was 45% by weight of the total mixture The Optimum Moisture Content (OMC) value decreases gradually with the increase in FA and SD content till its valuation was 45% by weight of the total mixture. From the obtained results of various tests conducted on the Expansive Soil, an appreciative result was obtained at 15% fly ash and 30% Stone Dust.

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Thank you....