Click here to load reader

Review of Foamed Bitumen Stabilisation Mix Design Methods · PDF file Foamed bitumen stabilisation is a road construction technique whereby bitumen is used to bind the existing or

  • View
    3

  • Download
    0

Embed Size (px)

Text of Review of Foamed Bitumen Stabilisation Mix Design Methods · PDF file Foamed bitumen...

  • AP-T178/11

    AUSTROADS TECHNICAL REPORT

    Review of Foamed Bitumen Stabilisation Mix Design Methods

  • Review of Foamed Bitumen Stabilisation Mix Design Methods

  • Review of Foamed Bitumen Stabilisation Mix Design Methods

    Published June 2011

    © Austroads Ltd 2011

    This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without the prior written permission of Austroads.

    Title of Publication ISBN 978-1-921709-77-7

    Austroads Project No. TT1358

    Austroads Publication No. AP–T178/11

    Project Manager Allan Jones

    Prepared by

    Colin Leek and Geoff Jameson

    Published by Austroads Ltd Level 9, Robell House 287 Elizabeth Street

    Sydney NSW 2000 Australia Phone: +61 2 9264 7088

    Fax: +61 2 9264 1657 Email: [email protected]

    www.austroads.com.au

    Austroads believes this publication to be correct at the time of printing and does not accept responsibility for any consequences arising from the use of information herein. Readers should rely on their own skill and

    judgement to apply information to particular issues.

  • Review of Foamed Bitumen Stabilisation Mix Design Methods

    Sydney 2011

  • Austroads profile Austroads’ purpose is to contribute to improved Australian and New Zealand transport outcomes by:

     providing expert advice to SCOT and ATC on road and road transport issues  facilitating collaboration between road agencies  promoting harmonisation, consistency and uniformity in road and related operations  undertaking strategic research on behalf of road agencies and communicating outcomes  promoting improved and consistent practice by road agencies.

    Austroads membership Austroads membership comprises the six state and two territory road transport and traffic authorities, the Commonwealth Department of Infrastructure and Transport, the Australian Local Government Association, and New Zealand Transport Agency. Austroads is governed by a Board consisting of the chief executive officer (or an alternative senior executive officer) of each of its 11 member organisations:

     Roads and Traffic Authority New South Wales  Roads Corporation Victoria  Department of Transport and Main Roads Queensland  Main Roads Western Australia  Department for Transport, Energy and Infrastructure South Australia  Department of Infrastructure, Energy and Resources Tasmania  Department of Lands and Planning Northern Territory  Department of Territory and Municipal Services Australian Capital Territory  Commonwealth Department of Infrastructure and Transport  Australian Local Government Association  New Zealand Transport Agency. The success of Austroads is derived from the collaboration of member organisations and others in the road industry. It aims to be the Australasian leader in providing high quality information, advice and fostering research in the road sector.

  • Review of Foamed Bitumen Stabilisation Mix Design Methods

    A u s t r o a d s 2 0 1 1

    — i —

    CONTENTS

    1 INTRODUCTION ...................................................................................................................... 1 1.1 General ..................................................................................................................................... 1 1.2 Selected Mix Design Methods .................................................................................................. 1

    1.2.1 South African Methods .............................................................................................. 1 1.2.2 Queensland Department of Transport and Main Roads Method ............................... 2 1.2.3 Austroads Pavement Technology Series ................................................................... 2

    1.3 Purpose for Characterisation of Materials ................................................................................ 2 2 MATERIAL PROPERTIES ....................................................................................................... 4 2.1 Bitumen Foaming Properties .................................................................................................... 4

    2.1.1 Austroads ................................................................................................................... 6 2.1.2 Queensland Department of Transport and Main Roads ............................................ 6 2.1.3 Asphalt Academy ....................................................................................................... 6

    2.2 Aggregate Properties ................................................................................................................ 7 2.2.1 Particle Size Distribution ............................................................................................ 7 2.2.2 Aggregate Plasticity ................................................................................................... 8 2.2.3 Secondary Binders .................................................................................................... 8 2.2.4 Aggregate Angularity ............................................................................................... 10 2.2.5 Aggregate Durability ................................................................................................ 11

    3 MIX DESIGN ........................................................................................................................... 12 3.1 Aggregate Preparation ............................................................................................................ 12

    3.1.1 Queensland Department of Transport and Main Roads .......................................... 12 3.1.2 CSIR Transportek and Asphalt Academy ................................................................ 12

    3.2 Bitumen Content for Trial Mixes ............................................................................................. 12 3.2.1 Austroads ................................................................................................................. 13 3.2.2 Queensland Department of Transport and Main Roads .......................................... 13 3.2.3 Asphalt Academy ..................................................................................................... 13

    3.3 Secondary Binder Contents .................................................................................................... 14 3.4 Moisture Content for Trial Mixes ............................................................................................. 14

    3.4.1 Queensland Department of Transport and Main Roads .......................................... 14 3.4.2 Asphalt Academy ..................................................................................................... 14

    3.5 Mixing and Compaction .......................................................................................................... 15 3.5.1 Austroads ................................................................................................................. 15 3.5.2 Queensland Department of Transport and Main Roads .......................................... 16 3.5.3 Asphalt Academy ..................................................................................................... 17

    3.6 Laboratory Curing Conditions ................................................................................................. 17 3.6.1 Austroads ................................................................................................................. 18 3.6.2 Queensland Department of Transport and Main Roads .......................................... 18 3.6.3 Asphalt Academy ..................................................................................................... 18

    3.7 Design Binder Content Determination .................................................................................... 19 3.7.1 Austroads ................................................................................................................. 19 3.7.2 Queensland Department of Transport and Main Roads .......................................... 19 3.7.3 Asphalt Academy ..................................................................................................... 20

    4 DISCUSSION ......................................................................................................................... 24 4.1 Foaming Water Content .......................................................................................................... 24 4.2 Materials Suitable for Foamed Bitumen Stabilisation ............................................................. 24

  • Review of Foamed Bitumen Stabilisation Mix Design Methods

    A u s t r o a d s 2 0 1 1

    — ii —

    4.2.1 Varying Requirements with Traffic Loading ............................................................. 24 4.2.2 Aggregate Grading .................................................................................................. 25 4.2.3 Plasticity ................................................................................................................... 26 4.2.4 Aggregate Durability ................................................................................................ 26 4.2.5 Aggregate Angularity ........................................