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John S. Mccartney - One of the best experts on this subject based on the ideXlab platform.

  • Pullout of geogrids from tire-Derived Aggregate having large particle size
    Geosynthetics International, 2020
    Co-Authors: Ismaail Ghaaowd, John S. Mccartney
    Abstract:

    Although tire-Derived Aggregate (TDA) has been used as an alternative backfill in geotechnical engineering applications, the interaction between TDA having large particle sizes (e.g. TDA with a max...

  • Shearing Behavior of Interfaces between Tire-Derived Aggregate and Three Soil Materials
    Journal of Materials in Civil Engineering, 2020
    Co-Authors: Ismaail Ghaaowd, Patrick J. Fox, John S. Mccartney
    Abstract:

    AbstractWhen tire Derived Aggregate (TDA) is used as a lightweight monolithic fill in civil engineering applications, such as embankments and retaining walls, the shearing behavior of TDA-interface...

  • Large-scale combination direct shear/simple shear device for tire-Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • large scale combination direct shear simple shear device for tire Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • shearing behavior of tire Derived Aggregate with large particle size i internal and concrete interface direct shear
    Journal of Geotechnical and Geoenvironmental Engineering, 2017
    Co-Authors: Ismaail Ghaaowd, John S. Mccartney, Michael J. Sanders, Stuart S. Thielmann, Patrick J. Fox
    Abstract:

    AbstractTire-Derived Aggregate (TDA) has been used widely in civil engineering applications such as highway embankments, light rail foundations, landslide repairs, and retaining walls as both a rec...

Lijuan Cheng - One of the best experts on this subject based on the ideXlab platform.

  • Material properties of large-size tire Derived Aggregate for civil engineering applications
    Journal of Materials in Civil Engineering, 2015
    Co-Authors: Il-sang Ahn, Lijuan Cheng, Patrick J. Fox, Joaquin Wright, Stacey Patenaude, Bob Fujii
    Abstract:

    AbstractTire Derived Aggregate (TDA) is a recycled fill material produced by cutting scrap tires into pieces ranging in size from 12 to 305 mm. For the last two decades, TDA has been successfully used in various projects such as embankments, bridge abutments, subgrade insulation for roads, vibration mitigation for rail lines, and landfill daily cover. The material properties of TDA are necessary for the planning and design of such projects; however, there is limited information available, especially for large-size TDA (maximum particle size ≥75  mm). Large-size TDA is typically used as lightweight fill material for embankments, foundations, and retaining walls. In this paper, the material properties of large-size TDA, as collected from published sources and recently completed material tests, are presented and discussed. These properties include unit weight, shear strength, compressibility, and lateral earth pressure coefficient. In addition, several civil engineering projects are discussed and compared to...

  • tire Derived Aggregate for retaining wall backfill under earthquake loading
    Construction and Building Materials, 2014
    Co-Authors: Lijuan Cheng
    Abstract:

    Abstract Tire Derived Aggregate (TDA) is a recycled lightweight construction material produced by cutting waste tires. The present research aims at evaluating the dynamic performance of TDA backfill under simulated earthquakes based on a full-scale shake table test. Main test results such as accelerations, wall displacements, and dynamic pressures are presented and discussed in this paper. A comparison with a similar shake table test of a wall with conventional soil backfill shows that the amount of wall sliding increased but the dynamic pressure on the wall exerted by the TDA backfill substantially decreased.

Patrick J. Fox - One of the best experts on this subject based on the ideXlab platform.

  • Shearing Behavior of Interfaces between Tire-Derived Aggregate and Three Soil Materials
    Journal of Materials in Civil Engineering, 2020
    Co-Authors: Ismaail Ghaaowd, Patrick J. Fox, John S. Mccartney
    Abstract:

    AbstractWhen tire Derived Aggregate (TDA) is used as a lightweight monolithic fill in civil engineering applications, such as embankments and retaining walls, the shearing behavior of TDA-interface...

  • Large-scale combination direct shear/simple shear device for tire-Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • large scale combination direct shear simple shear device for tire Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • shearing behavior of tire Derived Aggregate with large particle size i internal and concrete interface direct shear
    Journal of Geotechnical and Geoenvironmental Engineering, 2017
    Co-Authors: Ismaail Ghaaowd, John S. Mccartney, Michael J. Sanders, Stuart S. Thielmann, Patrick J. Fox
    Abstract:

    AbstractTire-Derived Aggregate (TDA) has been used widely in civil engineering applications such as highway embankments, light rail foundations, landslide repairs, and retaining walls as both a rec...

  • Shearing Behavior of Tire-Derived Aggregate with Large Particle Size. II: Cyclic Simple Shear
    Journal of Geotechnical and Geoenvironmental Engineering, 2017
    Co-Authors: John S. Mccartney, Ismaail Ghaaowd, Patrick J. Fox, Michael J. Sanders, Stuart S. Thielmann, Andrew C. Sander
    Abstract:

    AbstractAlthough tire-Derived Aggregate (TDA) has been used widely as lightweight fill in civil engineering applications, the properties governing its response under cyclic loading are not well und...

Alireza Bayat - One of the best experts on this subject based on the ideXlab platform.

  • Predicting one-dimensional compression of tire Derived Aggregate using a simple method
    Soils and Foundations, 2019
    Co-Authors: Chao Kang, Alireza Bayat
    Abstract:

    Abstract Tire Derived Aggregate (TDA) is a material that exhibits high compression under loading, a factor that governs its design and performance in civil engineering. Due to the large size of TDA particles (up to 305 mm), it is hard to obtain undisturbed TDA samples from the field to perform compression testing in the laboratory. Commonly, laboratory compression tests are conducted on TDA with small particle sizes, and hence the stress-strain curves obtained cannot be directly used to predict the field compression of TDA with different particle sizes and initial unit weights. To solve this problem, this study proposes a simple method to predict the compression of TDA based on its compression modulus (Ec)-void ratio (e) relationship under one-dimensional loading. The effectiveness of this method is evaluated using experimental data from laboratory and field tests. The results indicate that TDA samples with different particle sizes and initial unit weights have a very similar Ec − e relationship under one-dimensional loading. Hence, the Ec − e relationship can be determined from a relatively small-scale laboratory compression test, and can then be used to predict the compression of TDA with different particle sizes, initial unit weights, tire sources, and test scales. The accuracy of the prediction relies on the accuracy of the measurements for specific gravity and initial unit weight.

  • Performance Evaluation of Highway Embankment Constructed from Tire-Derived Aggregate Using Falling Weight Deflectometer Tests
    Transportation Infrastructure Geotechnology, 2016
    Co-Authors: Daniel Meles, Yaolin Yi, Alireza Bayat
    Abstract:

    To evaluate the performance of tire-Derived Aggregate (TDA) for use as highway embankment fill material, a test embankment was constructed in Edmonton, Alberta, Canada. The test embankment was 80 m in length and contained four different test sections, each 20 m in length. The four test sections consisted of embankment material made from passenger and light truck tires (PLTT), off-the-road (OTR) truck tires, TDA-soil mixture, and soil without TDA. The performance of the test embankment was evaluated using falling weight deflectometer (FWD) tests following the placement of each pavement layers (subgrade, base course, and asphalt). FWD deflection data measured at different times for a year, and backcalculated moduli and deflection basin parameters, such as maximum deflection (Do), base layer index (BLI), middle layer index (MLI), and lower layer index (LLI) computed from the deflection data suggest that a TDA fill with a design similar to that used in this study would perform satisfactorily as highway fill.

  • Performance Evaluation of Highway Embankment Constructed from Tire-Derived Aggregate Using Falling Weight Deflectometer Tests
    Transportation Infrastructure Geotechnology, 2016
    Co-Authors: Daniel Meles, Alireza Bayat
    Abstract:

    To evaluate the performance of tire-Derived Aggregate (TDA) for use as highway embankment fill material, a test embankment was constructed in Edmonton, Alberta, Canada. The test embankment was 80 m in length and contained four different test sections, each 20 m in length. The four test sections consisted of embankment material made from passenger and light truck tires (PLTT), off-the-road (OTR) truck tires, TDA-soil mixture, and soil without TDA. The performance of the test embankment was evaluated using falling weight deflectometer (FWD) tests following the placement of each pavement layers (subgrade, base course, and asphalt). FWD deflection data measured at different times for a year, and backcalculated moduli and deflection basin parameters, such as maximum deflection (Do), base layer index (BLI), middle layer index (MLI), and lower layer index (LLI) computed from the deflection data suggest that a TDA fill with a design similar to that used in this study would perform satisfactorily as highway fill.

  • Finite-Element Analysis of Highway Embankment Made from Tire-Derived Aggregate
    Journal of Materials in Civil Engineering, 2016
    Co-Authors: Daniel Meles, Dave Chan, Alireza Bayat
    Abstract:

    Tire-Derived Aggregate (TDA) has been used in many civil engineering applications. Despite its successful use in the past, the amount of experimental research available on TDA applications is not sufficient to provide data for the evaluation of an appropriate constitutive model. The majority of TDA constitutive models have been developed from laboratory tests performed on tire chips smaller than those used in field applications. In this study, nonlinear elastic material models, with an elastic modulus that varies as a function of vertical stress, have been developed for TDA produced from passenger and light truck tire (PLTT) and off-the-road (OTR) vehicle tires. The material model for TDA is established based on previous large-scale laboratory constrained compression tests conducted on TDA up to 300 mm in size. The model is used in a finite-element (FE) analysis using geotechnical software to predict the settlement of full-scale test embankment during construction. The results indicate that the settlements obtained from the FE analysis agree with the settlements measured in the field during construction of full-scale test embankment. This paper also provides design charts to compute overbuild required on top of TDA layer(s) to compensate immediate compression under an applied load during the placement of cover on top of TDA.

  • On the compressibility of tire-Derived Aggregate: comparison of results from laboratory and field tests
    Canadian Geotechnical Journal, 2015
    Co-Authors: Daniel Meles, Somayeh Nassiri, Alireza Bayat
    Abstract:

    Compression behavior of tire-Derived Aggregate (TDA) was investigated through relatively small-scale and large-scale laboratory one-dimensional compression tests, as well as a full-scale field test. Two types of TDA produced from passenger and light truck tire (PLTT) and off-the-road (OTR) tire were tested. The influence of initial void ratio (e0), particle size, tire source, and testing method on the compression behavior of TDA was investigated. The results indicated that the compressibility of TDA was primarily dominated by its e0. OTR yielded lower e0 than PLTT with similar particle size and the same compaction method. TDA in the field was pre-compressed by self-weight, resulting in lower e0 and compressibility compared with laboratory samples. At relatively high stress levels, all TDA exhibited similar void ratio–stress curves regardless of e0, particle size, tire source or testing method. High e0, small particle size, and granular particle shape facilitated the sliding and rolling of TDA particles, r...

Ismaail Ghaaowd - One of the best experts on this subject based on the ideXlab platform.

  • Pullout of geogrids from tire-Derived Aggregate having large particle size
    Geosynthetics International, 2020
    Co-Authors: Ismaail Ghaaowd, John S. Mccartney
    Abstract:

    Although tire-Derived Aggregate (TDA) has been used as an alternative backfill in geotechnical engineering applications, the interaction between TDA having large particle sizes (e.g. TDA with a max...

  • Shearing Behavior of Interfaces between Tire-Derived Aggregate and Three Soil Materials
    Journal of Materials in Civil Engineering, 2020
    Co-Authors: Ismaail Ghaaowd, Patrick J. Fox, John S. Mccartney
    Abstract:

    AbstractWhen tire Derived Aggregate (TDA) is used as a lightweight monolithic fill in civil engineering applications, such as embankments and retaining walls, the shearing behavior of TDA-interface...

  • Large-scale combination direct shear/simple shear device for tire-Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • large scale combination direct shear simple shear device for tire Derived Aggregate
    Geotechnical Testing Journal, 2018
    Co-Authors: Patrick J. Fox, Ismaail Ghaaowd, Michael J. Sanders, Stuart S. Thielmann, Christopher Latham, John S. Mccartney
    Abstract:

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-Derived Aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

  • shearing behavior of tire Derived Aggregate with large particle size i internal and concrete interface direct shear
    Journal of Geotechnical and Geoenvironmental Engineering, 2017
    Co-Authors: Ismaail Ghaaowd, John S. Mccartney, Michael J. Sanders, Stuart S. Thielmann, Patrick J. Fox
    Abstract:

    AbstractTire-Derived Aggregate (TDA) has been used widely in civil engineering applications such as highway embankments, light rail foundations, landslide repairs, and retaining walls as both a rec...