Stabilization of Black Cotton Soil Using Jute Fibre

DOI : 10.17577/IJERTCONV10IS11017

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Stabilization of Black Cotton Soil Using Jute Fibre

Kiran Kumar M S

Department of Civil Engineering Jain Institute of Technology Davangere, India

Sanmathi R

Department of Civil Engineering Jain Institute of Technology Davangere, India

Sharavi C

Department of Civil Engineering Jain Institute of Technology Davangere, India

Syeda Ayesha Siddiqa Department of Civil Engineering Jain Institute of Technology Davangere, India

Umme Habiba B M Department of Civil Engineering

Jain Institute of Technology Davangere, India

Abstract Population growth has created better and more economical vehicle operations. There is an urgent need to develop a new method that improves the geotechnical properties of the subsoil. It has been found that jute fibers have a significant impact on improving unconstrained compressive strength over time. Unconfined compressive strength (UCS) and the soil's California Bearing Ratio (CBR). it is added to the soil in variable percentages.The observed values show a significant contribution to strength improvement when fibers are added. Improving soil properties such as optimal moisture content, maximum dry density by adding jute fibers to the soil. In our present study we got optimum for 4% usage of jute fibres.

Keywords Black cotton Soil, CBR, MDD, stabilization, Jute Fibre, OMC.


    Along with air and water, soil is one of the most important natural resources in the world. The term soil is a composed of minerals, organic matters and solid particles produced by disintegration of rocks. It continually undergoes development by way of numerous physical, chemical and biological processes, which include weathering with associated erosion. Given its complexity with and strong internal connectedness, soil ecologists regard soil as an ecosystem.


    A. Soil stabilization

    Soil stabilization a general term for any physical, chemical, mechanical, biological, or combined method of altering a natural soil to serve a technical purpose to reinforce road surfaces or any.

  3. OBJECTIVES The main objectives of project work are:

    • To increase the dry density and California bearing ratio of soil using jute fiber as a blend and improve the basic geotechnical properties of BC soil.

    • Investigate the effect of jute fibers on soil compressive strength.

      • Suggest the optimal dosage of jute fibers for overall improvement of the geotechnical properties of black cotton soil.

      • To determine the effects of adding jute fiber to black cotton soil on its properties such as Consistency Limits, Modified Proctor Test, California Stress Ratio Test, Atterberg Limits (Plastic Limit and Liquid Limit) and Unconfined Compressive Strength of the Soil.


    A.Materials used

    The different materials used in this project are

    1. Black cotton soil

      The soil used in the present study is expansive black cotton soil. Because of its expansion and contraction properties, black cotton floors have poor properties for large-scale construction. These soils are generally impermeable, expanding and becoming sticky during the rainy season and contracting during the dry season, causing cracks in the soil.

    2. Jute fibre

      Natural fiber 100% biodegradable, recyclable and therefore environmentally friendly, with a silky golden sheen. The second most important and most commonly grown plant fiber after cotton. High tensile strength with low extensibility.


      Collect the black cotton soil from the ground to a depth of 1.5 m.

      Basic tests can be performed on soil from harvestedblack cotton.

      Prepare the soil samples by adding jute fibers in different percentages (2%, 4% and 6%).

      In our case we prepare soil samples for the following test mixes.

      Soil particulars

      % of jute fibre added

      Natural BC soil

      Natural BC soil+0%jute fibre

      Soil sample-1

      Natural BC soil+2%jute fibre

      Soil sample-2

      Natural BC soil+4%jute fibre

      Soil sample-3

      Natural BC soil+6%jute fibre

      Table 1. Trial samples

      The following are the tests performed in the laboratory for the above prepared soil samples.

      • Specific gravity test (IS: 2720 Part-3,1980)

      • Plastic limit test (IS: 2720 Part-5, 1985)

      • Liquid limit test (IS: 2720 Part-4, 1985)

        UCS (IS: 2720 Part-10,1991)

        CBR Test (IS: 2720 Part-16,1987)

      • Proctor compaction (IS:2720 Part-8, 1983)

      • The test results are incorporated in table and plot the graphs.

      • Conclusions can be given by comparing the obtained graphs.


      1. Basic tests on Natural BC soil

    Table 2 indicating basic test results on BC soil

    Tests Conducted

    Test results

    Grain size analysis test

    CU=14.5 CC=2.75

    Specific gravity test


    Liquid limit test


    Plastic limit


    UCS Test


    CBR Test






    Table 2 Basic tests

    Fig No.1 Variation of UCS Test results

    D. California bearing ratio test

    It can be observed from table no 5 the CBR value shows gradually increasing for increase in percentage of jute fibre. Table no 5 showing CBR test results for different soil samples.

    Table no 5: table showing the overall CBR test results

    B. Specific gravity test

    Specific gravity is the ratio of mass/weight of dry soil solids in air to mass/weight of an equal volume of distilled water at 270°C. Soil specific gravity is used to calculate void fraction, porosity and degree of saturation when density and water content are known. Soil specific gravity helps in soil identification and classification. Table 3 showing the results of the specific gravity test for different soil samples.

    Table No.3: specific gravity for different soil samples (density bottle method)

    Soil Samples with jute fibers added

    UCS (Kg/cm2)

    Natural BC Soil


    Natural BC Soil+ 2% jute fibre


    Natural BC Soil+4% jute fibre


    Natural BC Soil+6%jute fibre


    C. Unconfined compression test

    From the table no 4 it can be observed that the UCS for natural BC soil showing 20.35(Kg/cm2) and is gradually increasing with addition of jute fibre.

    Table no 4: table showing the overall UCS Test results

    Fig No.2: Variation of CBR Test results

    E. Proctor compaction test

    From the table no 6 it can be observed that the MDD for natural BC soil showing 1.67 (gm/cc) and is gradually increasing reaching optimum at 4% and then it decreased. Hence BC soil +4% of jute fibre is taken as optimum.

    Soil sample with % of jute fibre added

    CBR (%)

    Natural BC soil


    Natural BC soil+2%jute fibre


    Natural BC soil+4% jute fibre


    Natural BC soil+ 6%jute fibre


    Soil sample with % of jute fibre

    MDD (gm/cc)

    Natural BC soil


    Natural BC soil+2%jute fibre


    Natural BC soil+4%jute fibre


    Natural BC soil + 6%jute fibre


    Table no 6: table showing the overall MDD test results

    Soil Samples with jute fibers added

    Specific gravity

    Natural BC Soil


    Natural BC Soil+2%jute fibre


    Natural BC Soil+4%jute fibre


    Natural BC Soil+6%jute fibre


    Fig No.3: Variation of MDD Test results

    Table no 7: table showing the overall optimum moisture content results

    Soil sample with% of jute fibre

    OMC (%)

    Natural BC soil


    Natural BC soil+2%jute fibre


    Natural BC soil+ 4% jute fibre


    Natural BC soil+6% jute fibre


    Fig No.4: Showing variations OMC test results


  • From this study it can be observed that the percentage addition of jute pieces (L = 30 mm and D = 2 mm) improves the properties of the BC soil.

  • From this it can be concluded that the MDD gradually increases and acquires an optimal value for the soil + 6% jute fiber compared to the natural soil BC.

  • The addition of jute fiber to expansive soil decreases its OMC and increases its MDD.

  • The results of the CBR tests will show that the addition of jute fibers gradually improves the resistance and significantly reduces the deformation behavior of the soil.

  • The UCS of natural BC soil increasing with the addition of jute fibre, soil strength increases with the addition of 6% jute fibre.

  • From the above general observations for the MDD, the California load ratio and the UCS test, it can be concluded that the soil sample with the addition of jute fibers gives good promising results.


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