Author: Alemgena Alene ArayaPublisher:
ISBN: 9789085707318
Category :
Languages : en
Pages : 183
Book Description
Characterization of unbound granular materials for pavements
Author: Alemgena Alene ArayaPublisher:
ISBN: 9789085707318
Category :
Languages : en
Pages : 183
Book Description
Unbound Granular Materials
Author: A. Gomes CorreiaCharacterization of Unbound Granular Layers in Flexible Pavements
Author: Alex Adu-OseiPerformance Characterisation of Unbound Granular Pavement Materials
Author: ARRB Transport Research, LtdPublisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 70
Book Description
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).
Mechanical and Drainage Performance Characterization of Unbound Granular Materials
Author: Amin MneinaPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
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.
Characterization of Unbound Granular Bases
Author: Lourdesnathan DavidPublisher:
ISBN:
Category : Pavements, Flexible
Languages : en
Pages : 162
Book Description
Pavements Unbound
Author: Andrew DawsonPublisher: CRC Press
ISBN: 9781439833803
Category : Technology & Engineering
Languages : en
Pages : 388
Book Description
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
Rigid and Flexible Pavement Design and Analysis
Author: Publisher: Transportation Research Board National Research
ISBN:
Category : Granular materials
Languages : en
Pages : 240
Book Description
Characterization of Granular Materials for Pavements
Author: Mechanistic Characterization of Unbound Granular Materials
Author: Bereket Yohannes TewoldebrhanPublisher:
ISBN:
Category :
Languages : en
Pages : 244
Book Description