Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock

J. H. Kim; B. Feng; E. Tutumluer; Y. H. Byun

Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock

J. H. Kim, B. Feng, E. Tutumluer, Y. H. Byun

Department of Agricutural civil engineering

University of Illinois at Urbana-Champaign

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

Lateral restraint is considered to be a primary mechanism of geogrid base stabilization, and the geogrid-aggregate interlocking establishes the stiffness enhancement around the geogrid. This paper introduces an innovative application of bender elements in an aggregate base as shear wave transducers to quantify local stiffness increase in the vicinity of a geogrid. Several triaxial test specimens of granite aggregate compacted at optimum moisture content were prepared for resilient modulus testing. For the geogrid-stabilized specimens, a triangular aperture punched and drawn geogrid was placed at mid-height of specimen. To measure shear wave velocities across the specimen at different locations above the geogrid, three bender element pairs were installed on the membrane at three different heights above the mid-specimen. Shear wave velocities and axial resilient strains were recorded under the applied stress states. The shear moduli obtained from the geogrid-stabilized specimen were always greater than those obtained from the unstabilized specimen thereby presenting a local stiffness improvement due to geogrid-aggregate interlocking. Further, in the stabilized specimens, the shear moduli obtained near the geogrid were always greater than those obtained far from the geogrid. Therefore, through the successful shear wave velocity measurements and shear modulus estimation, bender element pairs can be effectively used for the quantification of local stiffness improvement due to geogrid-stabilized aggregate.

Original language	English
Title of host publication	Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018
Editors	Eyad Masad, Ilaria Menapace, Amit Bhasin, Tom Scarpas, Anupam Kumar
Publisher	CRC Press/Balkema
Pages	511-514
Number of pages	4
ISBN (Print)	9781138313095
State	Published - 2018
Event	International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018 - Doha, Qatar Duration: 16 Apr 2018 → 18 Apr 2018

Publication series

Name	Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018

Conference

Conference	International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018
Country/Territory	Qatar
City	Doha
Period	16/04/18 → 18/04/18

Cite this

Kim, J. H., Feng, B., Tutumluer, E., & Byun, Y. H. (2018). Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock. In E. Masad, I. Menapace, A. Bhasin, T. Scarpas, & A. Kumar (Eds.), Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018 (pp. 511-514). (Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018). CRC Press/Balkema.

Kim, J. H. ; Feng, B. ; Tutumluer, E. et al. / Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock. Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018. editor / Eyad Masad ; Ilaria Menapace ; Amit Bhasin ; Tom Scarpas ; Anupam Kumar. CRC Press/Balkema, 2018. pp. 511-514 (Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018).

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title = "Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock",

abstract = "Lateral restraint is considered to be a primary mechanism of geogrid base stabilization, and the geogrid-aggregate interlocking establishes the stiffness enhancement around the geogrid. This paper introduces an innovative application of bender elements in an aggregate base as shear wave transducers to quantify local stiffness increase in the vicinity of a geogrid. Several triaxial test specimens of granite aggregate compacted at optimum moisture content were prepared for resilient modulus testing. For the geogrid-stabilized specimens, a triangular aperture punched and drawn geogrid was placed at mid-height of specimen. To measure shear wave velocities across the specimen at different locations above the geogrid, three bender element pairs were installed on the membrane at three different heights above the mid-specimen. Shear wave velocities and axial resilient strains were recorded under the applied stress states. The shear moduli obtained from the geogrid-stabilized specimen were always greater than those obtained from the unstabilized specimen thereby presenting a local stiffness improvement due to geogrid-aggregate interlocking. Further, in the stabilized specimens, the shear moduli obtained near the geogrid were always greater than those obtained far from the geogrid. Therefore, through the successful shear wave velocity measurements and shear modulus estimation, bender element pairs can be effectively used for the quantification of local stiffness improvement due to geogrid-stabilized aggregate.",

author = "Kim, {J. H.} and B. Feng and E. Tutumluer and Byun, {Y. H.}",

note = "Publisher Copyright: {\textcopyright} 2018 Taylor & Francis Group, London.; International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018 ; Conference date: 16-04-2018 Through 18-04-2018",

year = "2018",

language = "English",

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series = "Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018",

publisher = "CRC Press/Balkema",

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editor = "Eyad Masad and Ilaria Menapace and Amit Bhasin and Tom Scarpas and Anupam Kumar",

booktitle = "Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018",

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Kim, JH, Feng, B, Tutumluer, E & Byun, YH 2018, Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock. in E Masad, I Menapace, A Bhasin, T Scarpas & A Kumar (eds), Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018. Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018, CRC Press/Balkema, pp. 511-514, International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018, Doha, Qatar, 16/04/18.

Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock. / Kim, J. H.; Feng, B.; Tutumluer, E. et al.
Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018. ed. / Eyad Masad; Ilaria Menapace; Amit Bhasin; Tom Scarpas; Anupam Kumar. CRC Press/Balkema, 2018. p. 511-514 (Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock

AU - Kim, J. H.

AU - Feng, B.

AU - Tutumluer, E.

AU - Byun, Y. H.

PY - 2018

Y1 - 2018

N2 - Lateral restraint is considered to be a primary mechanism of geogrid base stabilization, and the geogrid-aggregate interlocking establishes the stiffness enhancement around the geogrid. This paper introduces an innovative application of bender elements in an aggregate base as shear wave transducers to quantify local stiffness increase in the vicinity of a geogrid. Several triaxial test specimens of granite aggregate compacted at optimum moisture content were prepared for resilient modulus testing. For the geogrid-stabilized specimens, a triangular aperture punched and drawn geogrid was placed at mid-height of specimen. To measure shear wave velocities across the specimen at different locations above the geogrid, three bender element pairs were installed on the membrane at three different heights above the mid-specimen. Shear wave velocities and axial resilient strains were recorded under the applied stress states. The shear moduli obtained from the geogrid-stabilized specimen were always greater than those obtained from the unstabilized specimen thereby presenting a local stiffness improvement due to geogrid-aggregate interlocking. Further, in the stabilized specimens, the shear moduli obtained near the geogrid were always greater than those obtained far from the geogrid. Therefore, through the successful shear wave velocity measurements and shear modulus estimation, bender element pairs can be effectively used for the quantification of local stiffness improvement due to geogrid-stabilized aggregate.

AB - Lateral restraint is considered to be a primary mechanism of geogrid base stabilization, and the geogrid-aggregate interlocking establishes the stiffness enhancement around the geogrid. This paper introduces an innovative application of bender elements in an aggregate base as shear wave transducers to quantify local stiffness increase in the vicinity of a geogrid. Several triaxial test specimens of granite aggregate compacted at optimum moisture content were prepared for resilient modulus testing. For the geogrid-stabilized specimens, a triangular aperture punched and drawn geogrid was placed at mid-height of specimen. To measure shear wave velocities across the specimen at different locations above the geogrid, three bender element pairs were installed on the membrane at three different heights above the mid-specimen. Shear wave velocities and axial resilient strains were recorded under the applied stress states. The shear moduli obtained from the geogrid-stabilized specimen were always greater than those obtained from the unstabilized specimen thereby presenting a local stiffness improvement due to geogrid-aggregate interlocking. Further, in the stabilized specimens, the shear moduli obtained near the geogrid were always greater than those obtained far from the geogrid. Therefore, through the successful shear wave velocity measurements and shear modulus estimation, bender element pairs can be effectively used for the quantification of local stiffness improvement due to geogrid-stabilized aggregate.

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M3 - Conference contribution

AN - SCOPUS:85061241284

SN - 9781138313095

T3 - Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018

SP - 511

EP - 514

BT - Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018

A2 - Masad, Eyad

A2 - Menapace, Ilaria

A2 - Bhasin, Amit

A2 - Scarpas, Tom

A2 - Kumar, Anupam

PB - CRC Press/Balkema

T2 - International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2018

Y2 - 16 April 2018 through 18 April 2018

ER -

Kim JH, Feng B, Tutumluer E, Byun YH. Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock. In Masad E, Menapace I, Bhasin A, Scarpas T, Kumar A, editors, Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018. CRC Press/Balkema. 2018. p. 511-514. (Advances in Materials and Pavement Performance Prediction - Proceedings of the International AM3P Conference, 2018).

Bender element pairs to effectively quantify local stiffness improvement due to geogrid-aggregate interlock

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