Unbound Aggregates in Roads

Unbound Aggregates in Roads

1st Edition - January 1, 1989

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  • Editors: R.H. Jones, A.R. Dawson
  • eBook ISBN: 9781483163215

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Unbound Aggregates in Roads contains the proceedings of the International Symposium on Unbound Aggregates in Roads (UNBAR3) held at the University of Nottingham, England, on April 11-13, 1989. The papers focus on unbound aggregates used in road construction and cover topics ranging from drainage and permeability to placement and compaction of unbound aggregates, design philosophy, specification, and compliance. This book consists of 49 chapters divided into eight sections and opens with an overview of the functions of unbound aggregates in roads, followed by a discussion on the mechanical properties of different aggregates and theoretical aspects of granular materials. The following chapters focus on granular drainage layers in pavement foundations; residual stresses caused by compaction in granular materials; and alternative materials for road construction such as steel slags and natural and waste materials. The use of unbound road aggregates in various countries such as Italy, France, Germany, and Portugal is also considered. This monograph will be a useful resource for designers, aggregate producers, contractors, specification writers, and materials engineers.

Table of Contents

  • Preface


    List of Participants

    Part I Introduction and General Reports

    1. Introduction

    2. General Report: Mechanical Properties

    3. General Report: Drainage and Permeability

    4. General Report: Waste Alternative Materials

    5. General Report: the Specification of Granular Materials for Unbound Pavement Layers

    Part II Placing and Compaction

    6. Keynote Paper. Placement and Compaction of Unbound Aggregates

    7. Production-Integrated Compaction Testing

    8. Compaction Meter and Compaction Documentation System

    9. Discussion

    Part III Drainage and Permeability

    10. Keynote Paper. Granular Drainage Layers in Pavement Foundations

    11. Horizontal Permeability of Compacted Aggregates

    12. A New Method for the Determination of Horizontal and Vertical Permeability of Cohesionless Basecourse Materials

    13. Technical Note. In-Situ Permeability Testing of Sub-bases on the M5 Motorway

    14. Stormwater Flow through Unbound Aggregate Sub-bases

    15. Discussion

    Part IV Mechanical Properties and Durability

    16. Keynote Paper. Mechanical Properties of Unbound Aggregates

    17. The Mechanical Properties of Unbound Aggregates from Various Sources

    18. A Repeated Load Triaxial Apparatus for Granular Materials

    19. The Measurement of Residual Stresses Due to Compaction in Granular Materials

    20. The Degradation of Furnace Bottom Ash Under Compaction

    21. Assessing Basalt Durability - Rapid Alternative Techniques

    22. Discussion

    Part V Alternative Materials

    23. Specifications for Materials Used as an Unbound Aggregate

    24. Steel Slags as Unbound Aggregate in Road Construction: Problems and Recommendations

    25. Design of Pavement Thicknesses Incorporating Alternative Granular Materials

    26. Natural and Waste Material - A Chance for Competition?

    27. Technical Note. Alternative Materials in Road Construction - An Approach for Research Implementation

    28. Discussion

    Part VI Design Philosophy, Specification and Compliance

    29. Keynote Paper. Design Philosophy

    30. The French Technique in the Use of Unbound Roadbase in Pavements

    31. Technical Note. Specifications and Standards for Unbound Aggregates and Their Use in the Federal Republic of Germany

    32. Specifications and Standards for Unbound Aggregates and Their Use in Italy

    33. Specifications and Standards for Unbound Aggregates and Their Use in Portugal

    34. Technical Note. A Study on Singapore Rocks for Use as Unbound Roadbase Material

    35. Use of Unbound Pavement Materials in Sweden and Other Scandinavian Countries

    36. Specifications and Standards for Unbound Aggregates in Roads and Their Use in the UK

    37. A Summary of Selected US Basecourse Specifications

    38. The Relation between Risks of Non-compliance and Production, Sampling and Testing Variations

    39. What Price Granular Materials in Road Construction?

    40. The Improvement of Roads in Developing Countries to Bituminous Standards Using Naturally Occurring Latentes

    41. Discussion

    Part VII Evaluating In Situ Performance

    42. Structural Contribution of Self-Cementing Granular Bases to Asphalt Pavements

    43. In-Situ Determination of Granular Basecourse Stiffness

    44. Assessing the Quality of Gravel Sub-Base

    45. The Use of Uniform Sand for Road Construction

    46. Measurement of Non-linear Deformation Characteristics of Unbound Aggregates by Natural Vibrations Method

    47. Technical Note. Development of a Prototype Variable Impact Testing Apparatus

    48. Discussion

    Part VIII Conclusions and Recommendations

    49. Conclusions and Recommendations for the Use of Unbound Aggregates in Roads

    Author Index

    Keyword Index

Product details

  • No. of pages: 436
  • Language: English
  • Copyright: © Butterworth-Heinemann 1990
  • Published: January 1, 1989
  • Imprint: Butterworth-Heinemann
  • eBook ISBN: 9781483163215

About the Editors

R.H. Jones

A.R. Dawson

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