Name: 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
Uploaded: 2021-07-07
Duration: 6 min 12 s
Description: Photo by Guillaume Lebelt on Unsplash. Photo by drmakete lab on Unsplash.

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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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Photo by Possessed Photography on Unsplash

Introduction  Problem Statement Objectives Material Methodology Results Conclusion 

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 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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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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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

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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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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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Chart, line chart

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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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Chart, line chart, scatter chart

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

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 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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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
   