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Unbound Aggregates in Roads - Andrew R. Dawson

Unbound Aggregates in Roads

By: Andrew R. Dawson (Editor)

Hardcover Published: 1st January 2000
ISBN: 9789058091475
Number Of Pages: 396

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The papers contained herein show that there is now an increasingly detailed understanding of both the fundamentals of unbound aggregate material behaviour and of its performance in practice. Coverage includes mechanical and hydraulic behaviour, specification, testing in the laboratory and in-situ, performance records and advanced material modelling. The papers were first presented at the 5th Unbound Aggregates in Roads Symposium in Nottingham, England in June 2000.

Introductionp. IX
Aggregate properties
Aggregates resistance to fragmentation, weathering and abrasionp. 3
Effects of the solid matrix of aggregates of the compression resistance of soil-lime mixturesp. 13
Influence of clay fraction and moisture on the behaviour of soil-aggregate mixturesp. 21
On the resilient behaviour of unbound aggregatesp. 29
A study on shape evaluation method of granular materialp. 35
Determining the dry density of foundation materials containing oversize particlesp. 41
European standards for unbound mixtures--A status reportp. 49
Laboratory testing of aggregates used in forest road construction in Irelandp. 55
Hydraulic and other properties
New apparatus for measuring the drainage properties of unbound aggregatesp. 63
Possibilities to achieve a high permeability of unbound aggregates and aspects for testingp. 69
Response and performance of a test pavement to freeze/thaw cycles in the Danish Road Testing Machinep. 77
Alternative materials
Use of stockpiled asphalt and demolition debris in road construction in Norwayp. 87
Expanded clay used for insulation in pavements--Strength and stiffness propertiesp. 93
Applicability of industrial by-products in pavement layers--Some research studies in LNECp. 101
The performance of recycled crushed concrete aggregatesp. 109
Weathered basalts, alternative aggregates for thin pavement basesp. 117
The effect of compaction on the mechanical behaviour of mix granulate base course materials and on pavement performancep. 125
Cyclic triaxial testing
Anisotropic characteristics of granular materialp. 139
Development of a large triaxial cell apparatus with variable deviatoric and confining stressesp. 145
Effects of fines content on the anisotropic response and characterisation of unbound aggregate basesp. 153
Triaxial testing of coarse grained mix granulates at scaled gradings and smaller specimen sizesp. 161
Resilient and permanent deformation behaviour of unbound granular materialsp. 171
In-situ testing and performance related specifications
Performance based specifications for road construction and materialsp. 183
A comparison of devices for measuring stiffness in-situp. 193
Comparison of stiffness moduli of secondary road base materials under laboratory and in-situ conditionsp. 201
Pavement performance related to material properties of unbound layers using FWD deflection testingp. 209
Stiffness evaluation of the subgrade and granular aggregates using the portable FWDp. 217
Mechanical properties of unbound aggregates from DCP and plate load testsp. 225
Stiffness behaviour of trial road foundationsp. 231
Experience with various types of foundation testsp. 239
Granular material models
System identification method for determining the anisotropic resilient properties of unbound aggregatesp. 249
Analysis of non-linear models describing the resilient behaviour for soils and unbound materialsp. 257
An elastoplastic model with kinematic hardening for unbound aggregates in roadsp. 265
Unbound granular base modeling--Effects on conventional flexible pavement critical responsesp. 271
Viscoelastic behaviour of granular materialsp. 279
The development of mechanistic-empirical permanent deformation design models for unbound pavement materials from laboratory and accelerated pavement test datap. 285
Observed performance
The hydraulic and structural behaviour of unbound granular sub-base layersp. 297
Irish experience in the use of unbound aggregates in roads 1970-2000p. 307
Seasonal variation of moisture and bearing capacity on Icelandic test road sectionsp. 317
Mechanical response of an unbound granular base course for a flexible pavementp. 325
Aggregates for forest enterprise roadsp. 335
Structural testing and performance of the Danish RTM-2 test pavementp. 343
Pavement analysis
An improved structural material model for unbound granular basesp. 353
Modelling a full scale experiment of two flexible pavement structures with unbound granular basesp. 359
Artificial neural network modelling of granular material behaviour under repeated loadingp. 369
Prediction of permanent deformation in the unbound aggregate and subgrade soils of a paved roadwayp. 377
Author indexp. 385
Table of Contents provided by Syndetics. All Rights Reserved.

ISBN: 9789058091475
ISBN-10: 9058091473
Audience: Professional
Format: Hardcover
Language: English
Number Of Pages: 396
Published: 1st January 2000
Publisher: A A Balkema Publishers
Country of Publication: NL
Dimensions (cm): 26.04 x 18.42  x 2.54
Weight (kg): 0.86
Edition Number: 1

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