The Experts below are selected from a list of 8637 Experts worldwide ranked by ideXlab platform

Lakhdar Mekki - One of the best experts on this subject based on the ideXlab platform.

  • Problematic Soil mechanics in the Algerian arid and semi-arid regions: Case of M’sila expansive clays
    2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state-of-the art review on the behavior of Problematic Soils in arid and semi-arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some Algerian expansive natural Soils, including those conducted on M’sila expansive clays.

  • Problematic Soil mechanics in the algerian arid and semi arid regions case of m sila expansive clays
    Journal of Applied Engineering Science & Technology, 2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state-of-the art review on the behavior of Problematic Soils in arid and semi-arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some Algerian expansive natural Soils, including those conducted on M’sila expansive clays.

  • Problematic Soil mechanics in the algerian arid and semi arid regions case of m sila expansive clays mecanique des sols problematiques dans les zones arides et semi arides en algerie cas des argiles expansive sde m sila
    2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state -of -the art review on the behavior of expansive Soils in arid and semi- arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some A lgerian expansive natural Soils, including those conducted on M'sila expansive clays. RESUME -Cet article presente une synthese sur l'etat des connaissances actuelles sur le comportement des sols expansifs dans les zones arides et semi-arides e nAlgerie, ou d'importants desordres apparaissent regulierement affectant les infrastructures routieres, voiries et reseaux divers et les constructions civiles et industrielles de faible hauteur . Il traite des etudes experimentales de caracterisation et de traitement effectuees sur quelques sols naturels expansifs algeriens, notamment celles effectuees surles argiles expansives de M'sila .

Mj Gunn - One of the best experts on this subject based on the ideXlab platform.

  • Implementation of biocementation for a partially saturated Problematic Soil of the UK railway network
    2020
    Co-Authors: Mu Safdar, Mavroulidou M, Mj Gunn, Gray C, Diane P, Jonathan G, Ian P
    Abstract:

    This paper refers to biocementation of a Problematic Soil of the UK railway network as a potential stabilisation technique of this Soil using indigenous ureolytic bacteria

  • Innovative methods of ground improvement for railway embankment Peat Fens foundation Soil
    'Thomas Telford Ltd.', 2020
    Co-Authors: Mu Safdar, Mavroulidou M, Mj Gunn, Garelick J, Purchase D
    Abstract:

    This paper presents research initiated with the aim of assessing the feasibility of biocementing Peat Fens Soil, a Problematic Soil underlying many of the embankments of the East Anglia railway network (UK). Biocementation of Soil is an emerging, novel ground improvement technique. It has recently attracted the interest of researchers worldwide because it has been proposed as potentially environmentally superior to chemical grouts and other common Soil stabilisers e.g. cement or lime (linked to high CO2 emissions). In this study we screened and isolated non-pathogenic indigenous ureolytic microbial candidates with potential for biocementation from samples originating from Peat Fens in East Anglia, UK. Four strains were selected as the most suitable candidates, based on their growth rate and their viability in a wide range of temperatures, pH and Soil moisture contents corresponding to typical seasonal field conditions. After a number of Unconfined Compressive Strength (UCS) tests, one strain (Bacillus licheniformis) was selected as the most promising for this Soil treatment and used for further study. Two different methods of implementation of the treatments were considered, namely pressure flow Soil column and electrokinetic injection. The UCS results supported by CaCO3 measurements as well as microstructural SEM-EDS analysis proved that biocementation did occur for both implementation methods and for a number of treatment combinations. Ongoing work on optimisation of treatments and implementation methods is carried out towards the upscaling of the techniques for in situ implementation which is planned for the next stage of the research

Mohamed Khemissa - One of the best experts on this subject based on the ideXlab platform.

  • Problematic Soil mechanics in the Algerian arid and semi-arid regions: Case of M’sila expansive clays
    2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state-of-the art review on the behavior of Problematic Soils in arid and semi-arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some Algerian expansive natural Soils, including those conducted on M’sila expansive clays.

  • Problematic Soil mechanics in the algerian arid and semi arid regions case of m sila expansive clays
    Journal of Applied Engineering Science & Technology, 2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state-of-the art review on the behavior of Problematic Soils in arid and semi-arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some Algerian expansive natural Soils, including those conducted on M’sila expansive clays.

  • Problematic Soil mechanics in the algerian arid and semi arid regions case of m sila expansive clays mecanique des sols problematiques dans les zones arides et semi arides en algerie cas des argiles expansive sde m sila
    2015
    Co-Authors: Mohamed Khemissa, Abdelkrim Mahamedi, Lakhdar Mekki
    Abstract:

    This paper presents a state -of -the art review on the behavior of expansive Soils in arid and semi- arid regions in Algeria, where significant damages frequently appear affecting the road infrastructures, roadway systems and various networks and other small civil and industrial constructions. It deals with characterization and treatment experimental studies on some A lgerian expansive natural Soils, including those conducted on M'sila expansive clays. RESUME -Cet article presente une synthese sur l'etat des connaissances actuelles sur le comportement des sols expansifs dans les zones arides et semi-arides e nAlgerie, ou d'importants desordres apparaissent regulierement affectant les infrastructures routieres, voiries et reseaux divers et les constructions civiles et industrielles de faible hauteur . Il traite des etudes experimentales de caracterisation et de traitement effectuees sur quelques sols naturels expansifs algeriens, notamment celles effectuees surles argiles expansives de M'sila .

Mu Safdar - One of the best experts on this subject based on the ideXlab platform.

  • Implementation of biocementation for a partially saturated Problematic Soil of the UK railway network
    2020
    Co-Authors: Mu Safdar, Mavroulidou M, Mj Gunn, Gray C, Diane P, Jonathan G, Ian P
    Abstract:

    This paper refers to biocementation of a Problematic Soil of the UK railway network as a potential stabilisation technique of this Soil using indigenous ureolytic bacteria

  • Innovative methods of ground improvement for railway embankment Peat Fens foundation Soil
    'Thomas Telford Ltd.', 2020
    Co-Authors: Mu Safdar, Mavroulidou M, Mj Gunn, Garelick J, Purchase D
    Abstract:

    This paper presents research initiated with the aim of assessing the feasibility of biocementing Peat Fens Soil, a Problematic Soil underlying many of the embankments of the East Anglia railway network (UK). Biocementation of Soil is an emerging, novel ground improvement technique. It has recently attracted the interest of researchers worldwide because it has been proposed as potentially environmentally superior to chemical grouts and other common Soil stabilisers e.g. cement or lime (linked to high CO2 emissions). In this study we screened and isolated non-pathogenic indigenous ureolytic microbial candidates with potential for biocementation from samples originating from Peat Fens in East Anglia, UK. Four strains were selected as the most suitable candidates, based on their growth rate and their viability in a wide range of temperatures, pH and Soil moisture contents corresponding to typical seasonal field conditions. After a number of Unconfined Compressive Strength (UCS) tests, one strain (Bacillus licheniformis) was selected as the most promising for this Soil treatment and used for further study. Two different methods of implementation of the treatments were considered, namely pressure flow Soil column and electrokinetic injection. The UCS results supported by CaCO3 measurements as well as microstructural SEM-EDS analysis proved that biocementation did occur for both implementation methods and for a number of treatment combinations. Ongoing work on optimisation of treatments and implementation methods is carried out towards the upscaling of the techniques for in situ implementation which is planned for the next stage of the research

Abdulazim Yildiz - One of the best experts on this subject based on the ideXlab platform.

  • prediction of bearing capacity of circular footings on soft clay stabilized with granular Soil
    Soils and Foundations, 2012
    Co-Authors: Murat Ornek, Mustafa Laman, Ahmet Demir, Abdulazim Yildiz
    Abstract:

    Abstract The shortage of available and suitable construction sites in city centres has led to the increased use of Problematic areas, where the bearing capacity of the underlying deposits is very low. The reinforcement of these Problematic Soils with granular fill layers is one of the Soil improvement techniques that are widely used. Problematic Soil behaviour can be improved by totally or partially replacing the inadequate Soils with layers of compacted granular fill. The study presented herein describes the use of artificial neural networks (ANNs), and the multi-linear regression model (MLR) to predict the bearing capacity of circular shallow footings supported by layers of compacted granular fill over natural clay Soil. The data used in running the network models have been obtained from an extensive series of field tests, including large-scale footing diameters. The field tests were performed using seven different footing diameters, up to 0.90 m, and three different granular fill layer thicknesses. The results indicate that the use of granular fill layers over natural clay Soil has a considerable effect on the bearing capacity characteristics and that the ANN model serves as a simple and reliable tool for predicting the bearing capacity of circular footings in stabilized natural clay Soil.