A STUDY ON SOIL STABILIZATION USING FLY ASH

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
J. Karthick ◽  
Ramkumar Thulasiram ◽  
S. Rajesh ◽  
M. Saravana Kumar ◽  
M. Thinakaranraj ◽  
...  
Keyword(s):  
Fly Ash ◽  
Soil Stabilization ◽  
Soil Improvement ◽  
Black Cotton Soil ◽  
Sieve Analysis ◽  
Unconfined Compression ◽  
Soil Behavior ◽  
Swell Index ◽  
Variable Head ◽  
Free Swell

The objective of this paper is to determine the optimum fly ash content at which soil behavior is improved. Soil improvement is termed as soil stabilization. Soil stabilization depends on factors such as unconfined compression, cohesion, shear load, consolidation and permeability of soil and CBR value of soil. Fly ash is a thermal waste. Nearly half of the fly ash generated is not been used, hence usage of fly ash will reduce waste. Test conducted were sieve analysis, specific gravity, standard proctor compaction, unconfined compression, direct shear, free swell index, variable head permeability and consolidation for black cotton soil. Test also was conducted on soil replaced with fly ash in the level of 5%, 10% and 15%. Among the various replacement tried out, better results were observed for soil replaced with 10% of fly ash. Beyond the 10% level of replacement a reduction in performance was observed. Hence fly ash can be used for soil stabilization up to 10% replacement.

scholarly journals Effect of Fly Ash and Cement on the Engineering Characteristic of Stabilized Subgrade Soil: An Experimental Study

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Partab Rai ◽  
Wenge Qiu ◽  
Huafu Pei ◽  
Jihui Chen ◽  
Xufeng Ai ◽  
...  
Keyword(s):  
Fly Ash ◽  
Soil Stabilization ◽  
Initial Value ◽  
Untreated Soil ◽  
Atterberg Limit ◽  
Treated Soil ◽  
Swell Index ◽  
Subgrade Soil ◽  
Free Swell ◽  
Free Swell Index

The effectiveness of the use of waste fly ash (FA) and cement (OPC) in the stabilization of subgrade soils and the reasons likely to influence the degree of stabilization were investigated. Incorporating waste fly ash (FA) and cement (OPC) as additives leads to significant environmental and economic contributions to soil stabilization. This study involves laboratory tests to obtain the Atterberg limit, free swell index (FSI), the unconfined compressive strength (UCS), the California bearing ratio (CBR), and the scanning electron microscope (SEM). The test results for the subgrade soil illustrate that the Atterberg limit, plasticity index, and free swell index are decreasing with the addition of different proportions of fly ash and cement, i.e., 0%, 5%, 10%, 15%, and 20% and 0%, 2%, 4%, 6%, and 8%, respectively. The CBR value of untreated soil is 2.91%, while the best CBR value of fly ash and cement mixture treated soil is 10.12% (20% FA+8% OPC), which increases 71.34% from the initial value. The UCS of untreated soil is 86.88 kPa and treated soil with fly ash and cement attains a maximum value of 167.75 kPa (20% FA+8% OPC), i.e., increases by 48.20% from the initial value. The tests result show that the stability of a subgrade soil can be improved by adding fly ash and cement. While effectiveness and usability of waste FA and cement are cost-effective and environmentally friendly alternatives to expansive soil for pavement and any other foundation work in the future.

scholarly journals Effect of industrial waste and RBI Grade 81 on swelling characteristics of clayey soil

2013 ◽  
Vol 11 (3) ◽  
pp. 231-236 ◽  
Author(s):  
B.M. Patil ◽  
K.A. Patil
Keyword(s):  
Fly Ash ◽  
Industrial Waste ◽  
Soil Stabilization ◽  
Clayey Soil ◽  
Industrial Wastes ◽  
Swell Index ◽  
Moisture Variation ◽  
Swelling Characteristics ◽  
Free Swell ◽  
Rbi Grade 81

This paper deals with improvement of swelling characteristics of clayey soil by adding industrial waste and RBI Grade 81. The construction of road in clayey soil is challenging due to its more swelling and more shrinkage characteristics. To overcome this problem there are two solutions one is replace the clayey soil by good quality granular material. The second is stabilizing the subgrade clayey soil by using various industrial wastes. Generally pond ash, fly ash and stone dust are use for soil stabilization. The swelling and shrinkage characteristics of clayey soil are considerably improved if it treated with industrial wastes and RBI Grade 81. The RBI Grade 81 is chemical soil stabilizer. The differential free swell index (DFS) test was carried out on different mix of soil, industrial waste and RBI Grade 81. The result shows that the DFS index of untreated soil obtained is 65% reduces to 35% by addition of 20% fly ash and 4% RBI Grade 81. This reduction in DFS index helps to reduce the effect of moisture variation in clayey soil.

scholarly journals Stabilization of Red soil and Black Cotton soil using Iron Slag and Fly Ash

2020 ◽  
Vol 9 (4) ◽  
pp. 1314-1319
Keyword(s):  
Fly Ash ◽  
Soil Stabilization ◽  
Swelling Pressure ◽  
Good Alternative ◽  
Red Soil ◽  
Black Cotton Soil ◽  
Dry Density ◽  
Maximum Dry Density ◽  
Swell Index ◽  
Iron Slag

The infrastructure is increasing day by day which leads to construction in the space where soil is not much of good strength and the Safe Bearing Capacity of soil is very low. In such areas soil stabilization can prove to be good alternative for improvement in its properties. The stabilization has been found to be effective in improvement of strength and compressibility. If soil is used for any construction purpose like pavement construction or embankments then such constructions may prove to be cost effective. Mixer like what is used in concrete making can be employed to mix the soil with different admixtures (Iron slag and fly ash) and then placing a mix soil for making road and embankment. If such constructions are done without stabilization then it will lead to decrease in strength and also increase in construction cost. The structures built upon such soil may also lead to failure. Initially cement and lime have been used to stabilize the soil but now we need to find other alternatives as there is lot of CO2 emission in the production of cement which is not safe for our environment. The alternatives to be used should not harm to the environment. In the present study we have used fly ash and iron slag in different proportion for red soil which obtained by the weathering of basalt (It is termed as red bole in Geological terms). The percentage of iron slag is used as 2%,4%,6%,8% and 15%by weight of soil and fly ash is used in 10%, 15%, 20% and 25%by weight of soil. After procuring the soil the Standard Proctor Tests were conducted to determine the Optimum Moisture Content and Maximum Dry Density. Red bole soil and black cotton soil are stabilized using iron slag and fly ash and then the results of various tests have been compared. Consistency Limits, Specific Gravity, Free Swell Index, Standard Proctor, Permeability, Direct Shear, Unconfined Compression Strength and Swelling Pressure tests were performed on each soil (i.e. red bole and black cotton). The tests were performed using the standard codes and the methodology as per various IS codes.

scholarly journals Stabilization of Black cotton soil using Fly ash

2021 ◽  
Vol 9 (5) ◽  
pp. 91-96
Author(s):  
Prerna Priya ◽  
Ran Vijay Singh
Keyword(s):  
Fly Ash ◽  
Soil Stabilization ◽  
Research Paper ◽  
Strength Properties ◽  
Engineering Properties ◽  
Black Cotton Soil ◽  
Significant Damage ◽  
The World ◽  
Wet Condition ◽  
Black Cotton Soils

Expansive Black cotton clay soils are widely distributed worldwide, and are a significant damage to infrastructure and buildigs.It is a common practice around the world to stabilize black cotton soil using fly ash to improve the strength of stabilized sub- base and sub grade soil. Soil stabilization is the improvement of strength or bearing capacity of soil by controlled compaction, proportioning or addition of suitable admixtures or stabilizers. The Black cotton soils are extremely hard when dry, but lose its strength fully when in wet condition. In monsoon they guzzle water and swell and in summer they shrink on evaporation of water from there. Because of its high Swelling and shrinkage characteristics the black cotton soils has been a challenge to the highway engineers.So in this research paper fly ash has been used to improve the various strength properties of natural black cotton soil.The objective of this research paper is to improve the engineering properties of black cotton soil by adding different percentage of fly ash by the weight of soil and make it suitable for construction. A series of standard Proctor tests (for calculation of MDD and OMC) and California Bearing Ratio (C.B.R) tests are conducted on both raw Black cotton soil and mixed soil with different percentages of fly ash (5%, 10%, 20%, 30%) by weight. A comparison between properties of raw black cotton soil, black cotton soil mixed with fly ash are performed .It is found that the properties of black cotton soil mixed with fly ash are suitably enhanced.

scholarly journals Reuse of Municipal Solid Waste from Incinerated Ash in the Stabilization of Clayey Soils

2020 ◽  
Vol 28 (4) ◽  
pp. 1-7
Author(s):  
B. J. S. Varaprasad ◽  
Jayaprakash Reddy Joga ◽  
Suryaprakash Reddy Joga
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Soil Stabilization ◽  
Sem Analysis ◽  
Primary Objective ◽  
Municipal Solid Wastes ◽  
Electron Microscopic ◽  
Swell Index ◽  
Swell Potential ◽  
Free Swell

AbstractA useful method for the disposal of waste from an incineration plant is to reuse it for geotechnical and civil engineering applications. The primary objective of this study concerns the reuse of local incinerated ash from municipal solid wastes in soil stabilization. Municipal Solid Waste Incinerated Ash (MSWIA) is blended with soil in various combinations and tested for its Atterberg limits, unconfined compressive strength (UCS), California Bearing Ratio (CBR), and Free Swell Index (FSI). A 1-D Consolidation Test was conducted, and changes in the soil during the test were examined by a scanning electron microscopic (SEM) analysis. The test results showed that there are increments in the UCS and CBR values with the reductions in the FSI, swell pressure, and swell potential of the treated soils.

Study on Soil Stabilization by Using Fly Ash and Ground Granulated Blast Furnace Slag (GGBS)

2021 ◽  
Vol 9 (8) ◽  
pp. 2506-2512
Author(s):  
Pratiksha R. Patil
Keyword(s):  
Blast Furnace ◽  
Fly Ash ◽  
Blast Furnace Slag ◽  
Soil Stabilization ◽  
Engineering Properties ◽  
Black Cotton Soil ◽  
Soil Test ◽  
Granulated Blast Furnace Slag ◽  
Strength And Durability ◽  
Furnace Slag

Abstract: Soil stabilization has become the more issue in construction activity. In this study we focus on improvement of soil by using Fly ash and ground granulated blast furnace slag (GGBS). In many villages there was demolition of houses due to flood situation and landslide so stabilization of soil is very important factor in this area. In these studies we use local Fly ash and Ground granulated blast furnace slag (GGBS) for stabilization of soil. Soil are generally stabilized to increase their strength and durability or to prevent soil erosion. The properties of soil vary a great deal at different places or in certain cases even at one place the success of soil stabilization depends on soil testing. Various methods are there to stabilize soil and the method should be verified in the lab with the soil material before applying it on the field. The various percentages of Fly ash and GGBS were mixed with soil sample to conduct soil test. Using fly ash reduces the plasticity index which has potential impact on engineering properties also GGBS has cementations property which acts as binding material for the soil. On addition of 15% Fly ash and 5% GGBS increase the strength of soil (according to IS2720:1985) it’s recommended for better result. Keywords: Stabilization of soil, Fly ash, GGBS, Black cotton soil, Soil test.

scholarly journals Evolution of the Geotechnical Properties of Fly Ash Stabilized Silty Soil Activated by Graphene Oxide (GO)

2019 ◽  
Vol 8 (2) ◽  
pp. 4732-4737 ◽  
Keyword(s):  
Graphene Oxide ◽  
Fly Ash ◽  
Soil Stabilization ◽  
Dry Density ◽  
Unconfined Compression ◽  
Maximum Dry Density ◽  
Unconfined Compression Test ◽  
Soil Matrix ◽  
Silty Soil ◽  
Limit Test

At present time, there are vastly available of various nanomaterials, by using this material it plays an important role in various applications along with geotechnical soil stabilization/strengthen techniques. In the present investigation the addition of Graphene Oxide (GO) solution as nanomaterial into the low cemented fly ash (Class F – fly ash) to improving various properties of a local available silty soil. The various tests such as light compaction test, unconfined compression test, direct shear test, liquid limit, and plastic limit test were performed on the newly formed matrix to check their respective behavior to stimulated actual site condition on the given matrix in the laboratory. Also Scanning Electron Microscopy (SEM) analysis was performed to study the structure of the newly formed matrix. The addition of small proportion GO in original soil-fly ash matrix decrease the plasticity index and at the same time increase the maximum dry density, unconfined compression strength, and cohesion value help to use newly soil matrix effectively.

scholarly journals Optimization of Clay Soil Stabilization using Waste Plastic Powder

2020 ◽  
Vol 9 (1) ◽  
pp. 854-858
Keyword(s):  
Soil Stabilization ◽  
Clay Soil ◽  
Plastic Material ◽  
Technological Advancement ◽  
Unconfined Compression Test ◽  
Swell Index ◽  
Southern District ◽  
Plastic Wastes ◽  
Plastic Powder ◽  
Free Swell

Usage of plastic products, including polythene sacks, cans, containers and packages, etc., is growing every day. It further raises the quantity of plastic material waste. This contributes to numerous issues with the environment and climate. For several decades much of the waste generated today will linger in the atmosphere, posing a number of environmental problems. herefore, excess will be utilized successfully in any sector of technological advancement. Many by-products are being produced using the plastic wastes. By adding plastic wastes to the clay soil, we have to know about the changes in the strengths like California bearing ratio, free swell index, and Unconfined Compression test. The soil collected for the investigation is from the southern district of Tamilnadu, India. The different percentage of plastic powder was replaced to improve the soil property.

scholarly journals Stabilization of black cotton soil using coconut fiber

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
K.U. Arathi ◽  
K.M. Arhulya ◽  
V. Vinaya ◽  
P.V. Pooja ◽  
V.V. Athira
Keyword(s):  
Compression Strength ◽  
Soil Stabilization ◽  
Expansive Soil ◽  
Liquid Limit ◽  
Black Cotton Soil ◽  
Unconfined Compression Strength ◽  
Unconfined Compression ◽  
Coconut Fiber ◽  
Loaded Structure ◽  
Properties Of Soil

Black cotton soil is a soil with low bearing capacity, swelling and shrinkage characteristics. Due to its peculiar characteristics, it forms a very poor foundation material. As black cotton soil is an expansive soil; it creates problem for lightly loaded structure than moderately loaded structure. Through this project, we are trying to study the improvements in the properties of soil by adding coconut fiber of varying percentages. Tests will be conducted to determine liquid limit and unconfined compression strength. Stabilization of soil is an effective method for improving the properties of soil. It has great significance in the future projects. Keywords: Soil stabilization, CBR, Atterberg limits

Experimental Investigation on the Microstructural Properties of Black Cotton Soil Stabilized with Cinder (Scoria) Fines and Class-C Fly Ash

2021 ◽  
Vol 56 ◽  
pp. 95-110
Author(s):  
Biruk Ayehutsega ◽  
Eleyas Assefa ◽  
Costas Sachpazis
Keyword(s):  
Fly Ash ◽  
Experimental Studies ◽  
Engineering Application ◽  
Expansive Soil ◽  
Liquid Limit ◽  
Plasticity Index ◽  
Black Cotton Soil ◽  
Microstructural Properties ◽  
Swell Index ◽  
Class C

Black cotton soil is one of the significant problematic soil for any civil or geotechnical engineering application in the whole world. In the past several decades, different experimental studies have been carried out on the stabilization of expansive soil and different types of stabilizers like lime, Portland cement, cement fly ash, and lime fly ash were used and applied in highway and others construction. However, those traditional stabilizers are not environmentally friendly thus further scientific study is needed to minimize the percentage of carbon-based stabilizers. The fact that Ethiopia encountered major engineering problems due to these problematic soils many researchers have been conducted a vital study using traditional stabilizers for several years however there is no significant study on the microstructural properties of stabilized black cotton soil. In this study, a scoria fines and class c fly ash are used at different blended groups, for each group, the stabilizer content ranges from 10 to 30%. The liquid limit and plasticity index of the soil has been decreased with the increasing content of class c fly ash (FA) and cinder fines (CF). Especially after the soil treated with 25% of class c fly ash and 25% of cinder fines, the liquid limit has decreased by 51.61% and, the plasticity index by 78.61%, linear shrinkage by 66.58%, and the free swell index decreased by 78.9%. The CBR and UCS value has increased by 86.2% and 83.9%, respectively, and CBR swell reduced by 61.2% with increasing stabilizer content. The microstructural properties of Raw black cotton soil and samples that are selected based on strength and index properties (BCS+FA3, BCS+CF3, BCS+CF+FA3) were observed by Scanning electron microscopy (SEM) imagining device, and the result clearly shows the alteration in fabric and morphology of the sample. After treatment with class c fly ash and cinder fines, the laminated configuration of black cotton soil has changed to more flocculated and coherent mass. Also, the SEM image proves that cinder fines impart a mechanical bonding that forms well-developed floccules and a more porous nature. These types of particle arrangement and clay aggregation bring the improvement in index and strength properties.

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