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Home»Articles»Engineering Properties of Bentonite Stabilized with Lime and Phosphogypsum

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The Asian Review of Civil Engineering (TARCE)

Editor Prof. Francesco Colangelo
Print ISSN : 2249 - 6203
Frequency : Half-Yearly

Engineering Properties of Bentonite Stabilized with Lime and Phosphogypsum

Author : Sujeet Kumar, Rakesh Kumar Dutta and Bijayananda Mohanty
Volume 3 No.1 January-June 2014 pp 23-35

Abstract

The paper presents the engineering properties such as compaction, unconfined compressive strength, consistency limits, percentage swell, free swell index, California bearing ratio and consolidation of bentonite stabilized with lime and phosphogypsum. The content of lime and phosphogypsum was varied from 0 to 10% to check the improvement in the engineering properties. The results of this study reveal that the dry unit weight and optimum moisture content of bentonite + 8% lime increased with the addition of 8% phosphogypsum. The dry unit weight and optimum moisture content of bentonite + 8% lime increased with the addition of 8% phosphogypsum. The percentage swell increased and free swell index decreased with the addition of 8% phosphogypsum to the bentonite + 8% lime mix. The unconfined compressive strength of the bentonite + 8% lime increased with the addition of 8% phosphogypsum as well as increase in curing period up to 14 days. Beyond a phosphogypsum content of 8%, the unconfined compressive strength decreased. The liquid limit and plastic limit of bentonite + 8% lime increased where as the plasticity index remains constant with the addition 8 % phosphogypsum. The California bearing ratio, modulus of subgrade reaction, secant modulus increased for the bentonite stabilized with lime and phosphogypsum. The coefficient of consolidation of bentonite increased with the addition of 8% lime and no change with the addition of 8 % phosphogypsum. The improved behaviour of the bentonite-lime-phosphogypsum mixture will boost the construction of road pavements on such problematic soils.

Keywords

Bentonite, Lime, Phosphogypsum, Consistency limits, Compaction, Consolidation, Unconfined compressive strength, CBR, Free swell index

Full Text:

References

The Asian Review of Civil Engineering (TARCE) is a half-yearly international peer-reviewed journal of Civil Engineering. One of the objectives of this journal is to disseminate knowledge on various research issues connected with the topics include, but are not limited to:

Coastal engineering
Construction engineering
Earthquake engineering
Environmental engineering
Geotechnical engineering
Water resources engineering
Materials engineering
Structural engineering
Surveying
Transportation engineering
Municipal or urban engineering

The paper presents the engineering properties such as compaction, unconfined compressive strength, consistency limits, percentage swell, free swell index, California bearing ratio and consolidation of bentonite stabilized with lime and phosphogypsum. The content of lime and phosphogypsum was varied from 0 to 10% to check the improvement in the engineering properties. The results of this study reveal that the dry unit weight and optimum moisture content of bentonite + 8% lime increased with the addition of 8% phosphogypsum. The dry unit weight and optimum moisture content of bentonite + 8% lime increased with the addition of 8% phosphogypsum. The percentage swell increased and free swell index decreased with the addition of 8% phosphogypsum to the bentonite + 8% lime mix. The unconfined compressive strength of the bentonite + 8% lime increased with the addition of 8% phosphogypsum as well as increase in curing period up to 14 days. Beyond a phosphogypsum content of 8%, the unconfined compressive strength decreased. The liquid limit and plastic limit of bentonite + 8% lime increased where as the plasticity index remains constant with the addition 8 % phosphogypsum. The California bearing ratio, modulus of subgrade reaction, secant modulus increased for the bentonite stabilized with lime and phosphogypsum. The coefficient of consolidation of bentonite increased with the addition of 8% lime and no change with the addition of 8 % phosphogypsum. The improved behaviour of the bentonite-lime-phosphogypsum mixture will boost the construction of road pavements on such problematic soils.

Editor-in-Chief
Prof. Francesco Colangelo
Department of Engineering, Universita degli Studi di Napoli Parthenope, Italy
[email protected]
Editorial Advisory Board
Dr. Suhana Binti Koting
Department of Civil Engineering, University of Malaya, Malaysia
[email protected]
Dr. Abdul Rahman Mohd. Sam
Department of Structure and Materials, Universiti Teknologi Malaysia
[email protected]
Prof. Sr Mokhtar Azizi Bin Mohd Din
Department of Civil Engineering, University of Malaya, Malaysia
[email protected]
Prof. N. Anuja
Department of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, India
[email protected]
Dr. Ramadhansyah Putra Jaya
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
[email protected]
Dr. Johan Bin Sohaili
Department of Civil Engineering , Universiti Teknologi Malaysia
[email protected]
Dr. Norhisham Bin Bakhary
Department of Structure and Materials, Universiti Teknologi Malaysia
[email protected]
Dr. Sitti Asmah Hassan
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
[email protected]
Dr. Libriati Binti Zardasti
Department of Structures and Materials, Universiti Teknologi Malaysia
[email protected]
Dr. Nor Zurairahetty Mohd Yunus
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
[email protected]
Dr. Zaiton Haron
Department of Structure and Materials, Universiti Teknologi Malaysia
[email protected]
Dr. Rini Asnida Abdullah
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
[email protected]
Dr. Mohd Razman bin Salim
Department of Environmental Engineering, Universiti Teknologi Malaysia
[email protected]
Dr. Norhidayah Abdul Hassan
Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
[email protected]
Dr. Yuen Choon Wah
Department of Civil Engineering, University of Malaya, Malaysia
[email protected]

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    Editorial Note

    Editorial Prof. Francesco Colangelo

    Editor-in-Chief
    Prof. Francesco Colangelo
    Department of Engineering, Universita degli Studi di Napoli Parthenope, Italy
    [email protected]
    Editorial Advisory Board
    Dr. Suhana Binti Koting
    Department of Civil Engineering, University of Malaya, Malaysia
    [email protected]
    Dr. Abdul Rahman Mohd. Sam
    Department of Structure and Materials, Universiti Teknologi Malaysia
    [email protected]
    Prof. Sr Mokhtar Azizi Bin Mohd Din
    Department of Civil Engineering, University of Malaya, Malaysia
    [email protected]
    Prof. N. Anuja
    Department of Civil Engineering, Mepco Schlenk Engineering College, Sivakasi, India
    [email protected]
    Dr. Ramadhansyah Putra Jaya
    Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
    [email protected]
    Dr. Johan Bin Sohaili
    Department of Civil Engineering , Universiti Teknologi Malaysia
    [email protected]
    Dr. Norhisham Bin Bakhary
    Department of Structure and Materials, Universiti Teknologi Malaysia
    [email protected]
    Dr. Sitti Asmah Hassan
    Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
    [email protected]
    Dr. Libriati Binti Zardasti
    Department of Structures and Materials, Universiti Teknologi Malaysia
    [email protected]
    Dr. Nor Zurairahetty Mohd Yunus
    Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
    [email protected]
    Dr. Zaiton Haron
    Department of Structure and Materials, Universiti Teknologi Malaysia
    [email protected]
    Dr. Rini Asnida Abdullah
    Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
    [email protected]
    Dr. Mohd Razman bin Salim
    Department of Environmental Engineering, Universiti Teknologi Malaysia
    [email protected]
    Dr. Norhidayah Abdul Hassan
    Department of Geotechnics and Transportation, Universiti Teknologi Malaysia
    [email protected]
    Dr. Yuen Choon Wah
    Department of Civil Engineering, University of Malaya, Malaysia
    [email protected]

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