Stabilization of Dumpyard Soil using Fly Ash

Stabilization of Dumpyard Soil using Fly Ash

Harisha. K.S

Department of civil engineering

Jain Institute of Technology , Davanagere

Renuka. P. V

Department of civil engineering Jain Institute Of Technology Davangere

Suchitra. T

Department Of Civil Engineering Jain Institute Of Technology Davangere

Pavan. E Department of civilengineering Jain Institute of Technology,

Davanagere

Sanjay. H. D Department of civilengineering Jain Institute Of Technology,

Davanagere

AbstractTo study the effect of fly ash in stabilization of untreated dump yard soil and the effects those which were affect the stability of the soil were studied by the tests which were conducted in laboratory like-specific gravity, atterberg limits and unconfined compressive strength by using the combination of soil and fly ash. All most all the living organisms depends much more on soil for their food and shelter. Due to the contamination of soil by dumping the waste, the quality of the soil decreases. Now a days soil pollution is the major concern in this environment. The main aim of this experimental study is to analyze the properties of dumpyard soil and to stabilize it.

Keywords:- Component;

STABILIZATION,F LYASH,DUMPYARD SOIL(UNTREATED)

1. INTRODUCTION

   Soil is the most important natural resource in this world. Like water and air, soil is also a need for basic life on the planet. Soil is one of the natural component that may consists of primarily composed minerals which are differs in their texture. The soil stabilization is the combination of both physical and chemicalstabilization. Physical stabilization like dynamic stabilization and chemical stabilization like combining the soil with lime, cement, fly ash etc. The biological decomposition of waste which was dumped on soil made the soil weak and it loses its strength. To regain the strength of the soil, stabilization is the necessary processand to achieve the greatest strength and that stabilized soil can be used for construction.

   DUMPYARD SOIL:- Illegal dumping of municipal wastes which was collected from households of the city in municipality lorries and dumped in the site, the soil which is present in that site under the dumped waste is called as dumpyard soil. The household waste may contains newspaper, meal scraps, sewage sludge, junk mail, e- wastes, grass clippings, dust, animal manure, street sweepings and broken furnitures etc. The waste was dumped in the shape of heap in open site. Some quantity of soil from this site was collected and used for

   laboratory experiments .

   FIG . DUMPYARD SOIL

   FLY ASH:- Fly ash is the bi-product which is produced from coal-fired electric, steam generating and cement plants. Basically, coal is pulverized and blown with air into the boilers combustion chamber where it immediately ignites generating heat andproducing a molten mineral residue to harden and form ash. The coarse ash particles settle at the bottom of the combustion chamber, while the lighter ash particles suspended in the flue gas which is termed as fly ash. Prior to exhausting the flue gas, fly ash removed by particulate emission control devices, such as electrostatic precipitators or filter fabric bag house.

   FIG .FLY ASH

2. MATERIALS AND METHODOLOGY

   1. Materials used :-

      • Dump yard soil (untreated soil)

      • Fly ash

   2. Methodology:-

   The laboratory tests were carried out on dump yard soil blended with fly ash. Later stabilization process was carried out on dump yard soil with fly ash mixing it with the different percentages like 10%, 20%, 30%, 40%. And to determine the strength of dump yard soil when blended with fly ash according to the standard percentage of fly ash by conduction of unconfined compressive strength test. The test result of all mixtures are compared and the optimum mix is identified.

   The following are the tests conducted on dumpyard soil blended with fly ash.

   1. Specific gravity test

   2. Grain size analysis.

   3. Atterbergs limit.Liquid limit. Plastic limit

   4. Unconfined compressive strength test.

   FIG . FLOW CHART OF METHODOLOGY

3. EXPERIMENTAL DETAILS

   The basic tests were conducted on dumpyard soil (untreated) and fly ash like specific gravity, grain size analysis, and atterbergs limit. Specimens were prepared at laboratory conditions atoptimum water content. Fly ash is blended with untreated soil in different percentages like 10%, 20%, 30%, 40% and specimens were taken out for unconfined compressive strength test.

   FIG . REPARATION OF SOIL

   Unconfined compressive strength was conducted for the

   specimens at different percentage of fly ash and the results was found as,for 10% of fly ash blended with the total weight soil, the compressive strength was 3.401 kg/cm2 , for 20% of fly ash blended with the total weight of soil, the compressive strength was 3.45kg/cm2 , for 30% of fly ash blended with the total weight of soil, the compressive strength was 3.6kg/cm2.

   FIG . SOIL SPECIMEN

   FIG . UNCONFINED COMPRESSIVE STRENGTH TEST

   BASIC TESTS	RESULTS
   Specific gravity if soil (untreated)	2.15
   Specific gravity of fly ash	2.3
   Grain size analysis	11.07
   (coefficient of uniformity)
   (coefficient of curvature)	0.65
   Plastic limit	50
   Liquid limit	22.3%

4. RESULTS AND DISCUSSION TABLE 1:- PROPERTIES OF SOIL

   FIG . GRAIN SIZE ANALYSIS

   FIG . LIQUID LIMIT

   Sl no	% of fly ash	Resul t
   1	10%	3.401 kg/cm2
   2	20%	3.45 kg/cm2
   3	30%	3.6 kg/cm2

   TABLE 2: UCC Test results.

   REFERENCES

   [1] Erdal Cokca (2001) Emerging trends in expansive soil stabilization: a review, Journal of Rock Mechanics and Geotechnical Engineering vol. 11, no. 2, pp. 423440, 2019.
   [2] S. Bhuvaneshwari, R. G. et al Fundamentals of soil stabilization,

   International Journal of Geo-Engineering, vol.8,no [3] 1, p. 26,2017

   [4] Malviya and Chaudhary, 2006; Kogbara et al. 2003 Effects of passivators on Artemisia selengensis yield and Cd stabilization in acontaminated soil, Polish Journal of Environmental Studies, vol. 30, no. 2, pp19031912, 2021
   [5] S. Bhuvaneshwari , R. G. Robinson , S. R. Gandhi Lime stabilization of betonies sludge from tunnel boring, Applied Clay Science,vol. 51, no. 3, pp. 250257,2011
   [6] Pandian et.al. (2002) Stabilization of Soils with Lime, Lime- Flyash, and Other Lime Reactive Materials, highway. Res. Board Bull., 1959
   [7] Phanikumar and Sharma (2004) Utilization of fly ash and lime to stabilize the expansive soil and to sustain pollution free environment – an experimental study, Materials Today: Proceedings , vol. 22, pp.694-700, 2020.

   FIG . UNCONFINED COMPRESSIVE STRENGTH

5. CONCLUSION

The main aim of this experiment is to determine the Unconfined compressive strength of the dumpyard soil (untreated) using fly ash. Fly ash if fused with We found the results, shows that the unconined compressive strength of the soil increases with the increase in fly ash content at some extent. High strength was gained at fly ash content of 30% and moderate strength was gained at fly ash content at 10%. When 40% of flyash added to the untreated soil, due to high content of fly ash the specimen for unconfined strength fails because of less cohesion in the soil