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Performance Characterisation of Unbound Granular Pavement Materials

Author: ARRB Transport Research, Ltd

Publisher:

Published: 1996

Total Pages: 70

ISBN-13:

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This document contains the proceedings of the National workshop on Performance characterisation of unbound granular pavement materials, held in Australia 27 April 1995. The session titles are as follows: Session 1 - AUSTROADS industry perspective; Session 2 - New technologies and developments; Sessions 3 & 4 - Facilitated forums and experimental panel; Session 5 - Facilitated forum. The papers presented at the sessions are as follows: Session 1 - Partnerships between Austroads and industry in technical developments (Midgley, L); Industry partnerships in technical development (Yates, T). Session 2 - An overview of AUSTROADS pavement design and analysis procedures (Jameson, G); An overview of mechanistic testing of unbound granular pavement materials (Andrews, B). Sessions 3 & 4 - 'Identifying the problems' and ;Looking for solutions' (Midgley, L, Jameson, G and Yates, T). Session 5 - "Where to from here" (Gordon, R, facilitator).

Book Synopsis Performance Characterisation of Unbound Granular Pavement Materials by : ARRB Transport Research, Ltd

Download or read book Performance Characterisation of Unbound Granular Pavement Materials written by ARRB Transport Research, Ltd and published by . This book was released on 1996 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document contains the proceedings of the National workshop on Performance characterisation of unbound granular pavement materials, held in Australia 27 April 1995. The session titles are as follows: Session 1 - AUSTROADS industry perspective; Session 2 - New technologies and developments; Sessions 3 & 4 - Facilitated forums and experimental panel; Session 5 - Facilitated forum. The papers presented at the sessions are as follows: Session 1 - Partnerships between Austroads and industry in technical developments (Midgley, L); Industry partnerships in technical development (Yates, T). Session 2 - An overview of AUSTROADS pavement design and analysis procedures (Jameson, G); An overview of mechanistic testing of unbound granular pavement materials (Andrews, B). Sessions 3 & 4 - 'Identifying the problems' and ;Looking for solutions' (Midgley, L, Jameson, G and Yates, T). Session 5 - "Where to from here" (Gordon, R, facilitator).

Unbound Granular Materials

Author: A. Gomes Correia

Publisher:

Published: 1999

Total Pages: 231

ISBN-13:

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Book Synopsis Unbound Granular Materials by : A. Gomes Correia

Download or read book Unbound Granular Materials written by A. Gomes Correia and published by . This book was released on 1999 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Towards Performance Based Specifications for Unbound Granular Pavement Materials

Author: Binh Vuong

Publisher:

Published: 2002

Total Pages: 141

ISBN-13: 9781876592073

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Book Synopsis Towards Performance Based Specifications for Unbound Granular Pavement Materials by : Binh Vuong

Download or read book Towards Performance Based Specifications for Unbound Granular Pavement Materials written by Binh Vuong and published by . This book was released on 2002 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Characterization of unbound granular materials for pavements

Author: Alemgena Alene Araya

Publisher:

Published: 2011

Total Pages: 183

ISBN-13: 9789085707318

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Book Synopsis Characterization of unbound granular materials for pavements by : Alemgena Alene Araya

Download or read book Characterization of unbound granular materials for pavements written by Alemgena Alene Araya and published by . This book was released on 2011 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Resilient Modulus Characterisation of Granular Unbound Pavement Materials. Report

Author: M. Mundy

Publisher:

Published: 1991

Total Pages: 43

ISBN-13: 9780646066066

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Book Synopsis Resilient Modulus Characterisation of Granular Unbound Pavement Materials. Report by : M. Mundy

Download or read book Resilient Modulus Characterisation of Granular Unbound Pavement Materials. Report written by M. Mundy and published by . This book was released on 1991 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Performance Based Characterization of Virgin and Recycled Aggregate Base Materials

Author: Mohammad Ahmeduzzaman

Publisher:

Published: 2016

Total Pages: 0

ISBN-13:

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Characterization of the effect of physical properties on the performance such as stiffness and drainage of unbound granular materials is necessary in order to incorporate them in pavement design. The stiffness, deformation and permeability behaviour of unbound granular materials are the essential design inputs for Mechanistic-Empirical Pavement Design Guide as well as empirical design methods. The performance based specifications are aimed to design, and construct a durable and cost effective material throughout the design life of a pavement. However, the specification varies among jurisdiction depending on the historical or current practice, locally available materials, landform, climate and drainage. A literature review on the current unbound granular materials virgin and recycled concrete aggregate base construction specification has been carried out in this study. Resilient modulus, permanent deformation and permeability tests have been carried out on seven gradations of materials from locally available sources. Resilient modulus stiffness of unbound granular material at two different conditioning stress level have been compared in the study. The long term deformation behaviour has also been characterized from results of the permanent deformation test using shakedown approach, dissipated energy approach and a simplified approach. The results show improvement in resilient modulus and permanent deformation for the proposed specification compared to the currently used materials as a results of reduced fines content, increased crush count and inclusion of larger maximum aggregate size into the gradation. A significant effect of particle packing on permeability of granular materials have also been found, in addition to the effect of fines.

Book Synopsis Performance Based Characterization of Virgin and Recycled Aggregate Base Materials by : Mohammad Ahmeduzzaman

Download or read book Performance Based Characterization of Virgin and Recycled Aggregate Base Materials written by Mohammad Ahmeduzzaman and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization of the effect of physical properties on the performance such as stiffness and drainage of unbound granular materials is necessary in order to incorporate them in pavement design. The stiffness, deformation and permeability behaviour of unbound granular materials are the essential design inputs for Mechanistic-Empirical Pavement Design Guide as well as empirical design methods. The performance based specifications are aimed to design, and construct a durable and cost effective material throughout the design life of a pavement. However, the specification varies among jurisdiction depending on the historical or current practice, locally available materials, landform, climate and drainage. A literature review on the current unbound granular materials virgin and recycled concrete aggregate base construction specification has been carried out in this study. Resilient modulus, permanent deformation and permeability tests have been carried out on seven gradations of materials from locally available sources. Resilient modulus stiffness of unbound granular material at two different conditioning stress level have been compared in the study. The long term deformation behaviour has also been characterized from results of the permanent deformation test using shakedown approach, dissipated energy approach and a simplified approach. The results show improvement in resilient modulus and permanent deformation for the proposed specification compared to the currently used materials as a results of reduced fines content, increased crush count and inclusion of larger maximum aggregate size into the gradation. A significant effect of particle packing on permeability of granular materials have also been found, in addition to the effect of fines.

Pavements Unbound

Author: Andrew Dawson

Publisher: CRC Press

Published: 2014-09-01

Total Pages: 388

ISBN-13: 9781439833803

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Nearly all highway, airport, dock and industrial pavements contain large quantities of untreated aggregate in the form of unbound pavement layers. In many pavements, which are lightly or moderately trafficked, crushed rock or gravel derived aggregates comprise the majority of the construction or, in the case of unsealed pavements, all of the structure. This book provides studies of the performance and description of this material that will help the reader to better understand its characteristics and behaviour both alone and as part of the pavement structure it forms. This work will be useful to practitioners, policy makers, researchers and students. It forms a sequel to the earlier book "Unbound Aggregates in Road Construction" also published by Balkema

Book Synopsis Pavements Unbound by : Andrew Dawson

Download or read book Pavements Unbound written by Andrew Dawson and published by CRC Press. This book was released on 2014-09-01 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nearly all highway, airport, dock and industrial pavements contain large quantities of untreated aggregate in the form of unbound pavement layers. In many pavements, which are lightly or moderately trafficked, crushed rock or gravel derived aggregates comprise the majority of the construction or, in the case of unsealed pavements, all of the structure. This book provides studies of the performance and description of this material that will help the reader to better understand its characteristics and behaviour both alone and as part of the pavement structure it forms. This work will be useful to practitioners, policy makers, researchers and students. It forms a sequel to the earlier book "Unbound Aggregates in Road Construction" also published by Balkema

Mechanical and Drainage Performance Characterization of Unbound Granular Materials

Author: Amin Mneina

Publisher:

Published: 2019

Total Pages: 0

ISBN-13:

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The drainage performance of unbound granular material (UGM) is an important consideration in pavement design because the presence of excess moisture in UGM layers can eventually lead to premature failures. Recently, transportation agencies have been evaluating their granular base and subbase drainage and mechanical performance to ensure sufficient drainage capacity while maintaining adequate structural support to produce more sustainable pavement structures. Linking performance to UGM construction specification requires accurate characterization of UGM's mechanical and drainage performance and how physical and gradation parameters affect such performance. These evaluations led to an update of the specification requirements of UGM in many jurisdictions including Manitoba. In this research, constant head hydraulic conductivity, resilient modulus, permanent deformation, double ring infiltrometer, and falling weight deflectometer test methods were used in laboratory and field investigations. These tests were conducted to characterize the drainage and mechanical performance of ten UGM samples representing four different gradation bands. The laboratory test results were also used to investigate the reliability of the estimated hydraulic conductivity from the Moulton prediction model and from the Enhanced Integrated Climatic Model (EICM). Test results showed an improvement in resilient modulus and drainage quality for samples in gradation bands that specify larger maximum aggregate size and limited fines. A statistical analysis of the test results showed that D10 larger than 0.2mm and D60 larger than 8mm would guarantee higher stiffness and better drainage performance with a time-to drain of less than 5days for typical pavement cross-sections and a resilient modulus value exceeding 200MPa. The Moulton prediction model was found to provide a better approximation of hydraulic conductivity of the materials included in this study, while the EICM model was found to significantly overestimate the hydraulic conductivity for most of the samples.

Book Synopsis Mechanical and Drainage Performance Characterization of Unbound Granular Materials by : Amin Mneina

Download or read book Mechanical and Drainage Performance Characterization of Unbound Granular Materials written by Amin Mneina and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The drainage performance of unbound granular material (UGM) is an important consideration in pavement design because the presence of excess moisture in UGM layers can eventually lead to premature failures. Recently, transportation agencies have been evaluating their granular base and subbase drainage and mechanical performance to ensure sufficient drainage capacity while maintaining adequate structural support to produce more sustainable pavement structures. Linking performance to UGM construction specification requires accurate characterization of UGM's mechanical and drainage performance and how physical and gradation parameters affect such performance. These evaluations led to an update of the specification requirements of UGM in many jurisdictions including Manitoba. In this research, constant head hydraulic conductivity, resilient modulus, permanent deformation, double ring infiltrometer, and falling weight deflectometer test methods were used in laboratory and field investigations. These tests were conducted to characterize the drainage and mechanical performance of ten UGM samples representing four different gradation bands. The laboratory test results were also used to investigate the reliability of the estimated hydraulic conductivity from the Moulton prediction model and from the Enhanced Integrated Climatic Model (EICM). Test results showed an improvement in resilient modulus and drainage quality for samples in gradation bands that specify larger maximum aggregate size and limited fines. A statistical analysis of the test results showed that D10 larger than 0.2mm and D60 larger than 8mm would guarantee higher stiffness and better drainage performance with a time-to drain of less than 5days for typical pavement cross-sections and a resilient modulus value exceeding 200MPa. The Moulton prediction model was found to provide a better approximation of hydraulic conductivity of the materials included in this study, while the EICM model was found to significantly overestimate the hydraulic conductivity for most of the samples.

Characterisation of the Deformation Behaviour of Unbound Granular Materials Using Repeated Load Triaxial Testing

Author: Negin Zhalehjoo

Publisher:

Published: 2018

Total Pages: 420

ISBN-13:

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"Unbound Granular Materials (UGMs) are used in the base/subbase layers of flexible pavements for the majority of roads around the world. The deterioration of pavements increases with the increase of traffic loadings. To ensure the long-term performance and serviceability of pavement structures through a realistic design, the precise evaluation and comprehensive characterisation of the resilient and permanent deformation behaviour of pavement materials are essential. The present PhD study aims to investigate the characterisation of the resilient and permanent deformation behaviour of four road base UGMs sourced from quarries in Victoria, Australia, using Repeated Load Triaxial (RLT) testing. The triaxial system used in this study is instrumented with four axial deformation measurement transducers to achieve highly precise measurements and to evaluate the effect of instrumentation on the resilient modulus of UGMs. The resilient Poisson's ratio of the studied UGMs is also determined using a radial Hall-Effect transducer. Moreover, a series of permanent deformation tests is performed to precisely characterise the axial and radial permanent deformation behaviour of UGMs and investigate the factors that may significantly influence the accumulated axial and radial permanent deformations. Finally, three permanent deformation models incorporated with a time-hardening procedure are employed to predict the magnitude of permanent strain for multiple stress levels of the RLT test. The predictions using the employed models are then compared against the measured values to evaluate the suitability of the models and to identify the model that best predicts the strain accumulation behaviour of the tested UGMs. While this study focuses on the resilient and permanent deformation behaviour of four Victorian UGMs under repeated loading, the knowledge generated from this comprehensive investigation will contribute towards the global development of more reliable methods for evaluating the long-term performance of pavement structures and minimising road maintenance and repair costs." -- Abstract.

Book Synopsis Characterisation of the Deformation Behaviour of Unbound Granular Materials Using Repeated Load Triaxial Testing by : Negin Zhalehjoo

Download or read book Characterisation of the Deformation Behaviour of Unbound Granular Materials Using Repeated Load Triaxial Testing written by Negin Zhalehjoo and published by . This book was released on 2018 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Unbound Granular Materials (UGMs) are used in the base/subbase layers of flexible pavements for the majority of roads around the world. The deterioration of pavements increases with the increase of traffic loadings. To ensure the long-term performance and serviceability of pavement structures through a realistic design, the precise evaluation and comprehensive characterisation of the resilient and permanent deformation behaviour of pavement materials are essential. The present PhD study aims to investigate the characterisation of the resilient and permanent deformation behaviour of four road base UGMs sourced from quarries in Victoria, Australia, using Repeated Load Triaxial (RLT) testing. The triaxial system used in this study is instrumented with four axial deformation measurement transducers to achieve highly precise measurements and to evaluate the effect of instrumentation on the resilient modulus of UGMs. The resilient Poisson's ratio of the studied UGMs is also determined using a radial Hall-Effect transducer. Moreover, a series of permanent deformation tests is performed to precisely characterise the axial and radial permanent deformation behaviour of UGMs and investigate the factors that may significantly influence the accumulated axial and radial permanent deformations. Finally, three permanent deformation models incorporated with a time-hardening procedure are employed to predict the magnitude of permanent strain for multiple stress levels of the RLT test. The predictions using the employed models are then compared against the measured values to evaluate the suitability of the models and to identify the model that best predicts the strain accumulation behaviour of the tested UGMs. While this study focuses on the resilient and permanent deformation behaviour of four Victorian UGMs under repeated loading, the knowledge generated from this comprehensive investigation will contribute towards the global development of more reliable methods for evaluating the long-term performance of pavement structures and minimising road maintenance and repair costs." -- Abstract.

Highway Subdrainage Design

Author: Lyle K. Moulton

Publisher:

Published: 1980

Total Pages: 180

ISBN-13:

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Book Synopsis Highway Subdrainage Design by : Lyle K. Moulton

Download or read book Highway Subdrainage Design written by Lyle K. Moulton and published by . This book was released on 1980 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: