ROAD PAVEMENT RESEARCH ADVISORY COMMITTEE BMJA Verhaeghe 12 MAY 2005 - PowerPoint PPT Presentation

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ROAD PAVEMENT RESEARCH ADVISORY COMMITTEE BMJA Verhaeghe 12 MAY 2005

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Title: ROAD PAVEMENT RESEARCH ADVISORY COMMITTEE BMJA Verhaeghe 12 MAY 2005


1
ROAD PAVEMENT RESEARCH ADVISORY COMMITTEEBMJA
Verhaeghe12 MAY 2005
NINTH MEETING OF THE ROAD PAVEMENTS FORUM (RPF)
2
Resolution 6 (Nov04)
  • The Pavement Research Advisory Committee (PRAC)
    to provide feedback at the next RPF on the
    outcomes of the needs determination process as
    well as on the research themes that have been
    identified

3
Presentation outline
  • Background
  • Purpose Structure
  • Prioritisation of research needs
  • Synthesis of research needs
  • Prioritisation process
  • Way Ahead
  • Discussion

4
Background Purpose
  • To identify, prioritise and execute RD
    programmes, projects and activities that
  • Address the road infrastructure needs of SA
  • Enhance socio-economic impact
  • Promote sustainable development
  • Support asset preservation
  • Enhance SAs industry competitiveness
  • Support the interests of the industrys
    stakeholders
  • Position SA to address current needs and future
    challenges in road provision and maintenance

5
Background Structure (1)
  • RAC
  • Advise on RD needs priorities
  • Assist in technology foresight studies
  • Advise on development of strategic plans
    research portfolio plans
  • Assist in the review of outcomes
  • Assist in assessing the impact of RD activities

6
Background Structure (2)
  • Present members of RAC
  • ASPASA
  • Asphalt Academy
  • CCI
  • CIDB
  • CSIR
  • DoT
  • Gautrans
  • Jeffares Green
  • KZN DoT
  • Limpopo Roads Agency
  • PD Naidoo
  • RBPM
  • Sabita
  • SAFCEC
  • SANRAL
  • Tshwane University of technology
  • University of Pretoria
  • University of Stellenbosch
  • Vela VKE
  • Western Cape DoT
  • Women in Construction

7
Background Structure (3)
  • Manco
  • Select projects to be financed by sponsors
  • Request approve project plans
  • Source provide funding
  • Appoint champions teams
  • Provide management resources
  • Output quality review
  • Ensure effective technology transfer

8
Background Progress
  • RAC meeting of Jan 05
  • Finalised structure and responsibilities
  • Identified overarching industry needs
  • RAC meeting of May 05
  • Prioritisation of RD needs
  • Way forward

9
Prioritisation of RD Needs
  • Broad areas of research (RAC, Jan 05)
  • Identification classification of research needs
    (Feb-Mar 05)
  • Prioritisation of research needs
  • Feedback received from RAC members
  • Department of Transport SANRAL
  • APT Steering Committee
  • Road Materials Committee
  • CAPSA 04
  • Verification validation of identified research
    needs
  • RAC meeting of 5 May 05
  • RPF meeting of 11-12 May 05

10
Prioritisation of RD needs
  • 225 Research needs identified
  • Infrastructure Engineering (137)
  • Infrastructure Delivery (38)
  • Environment (22)
  • Planning Operations (14)
  • Policy, Economics Decision Support (10)
  • Resources (4)

11
Needs in Infrastructure Engineering
137 Identified Research Needs
12
Needs in Infrastructure Delivery
38 Identified Research Needs
13
Tentative Priorities
  • Priority A-rating
  • Thin bituminous surfacings
  • Foamed-bitumen bitumen-emulsion treated
    materials
  • Structural design performance
  • Gravel roads upgrading to paved standards
  • Traffic loading contact stresses
  • Design of hot-mix asphalt
  • Thin- ultra-thin concrete layers
  • Suitable replacements for tar-based products

14
Tentative Priorities
  • Priority B-rating
  • Performance-based specifications for bituminous
    binders
  • Lime- and cement-stabilised materials
  • Structural design of concrete pavements
  • Unbound materials
  • Pavement surveillance equipment
  • Cold-mix asphalt
  • Performance-based specifications for maintenance

15
Tentative Priorities
  • Priority C-rating
  • Quality control quality assurance
  • Impact of climate
  • Long-life pavements

16
Priority-A research needs
17
FBT EBT treated materials (A1)
  • Laboratory simulation of curing
  • Revision of structural design guidelines
  • Development of database on field performance
  • Effective stiffness concept
  • Role of active fillers
  • Revision of TG2 finalisation of sister document
    for emulsion-treated materials
  • Standard specifications for cold in-place
    recycling

18
Gravel roads their upgrading (A2)
  • Gravel roads
  • Improved deterioration models
  • Review of specifications for gravel wearing
    courses
  • Revision of TRH20
  • Implementation of certification process
  • Upgrading to paved standards
  • Cost-effective ways to upgrade gravel roads
  • Geometric standards
  • Minimum strength criteria for light pavements
  • Labour-intensive construction maintenance
  • Validation of SADC LVSR guidelines for SA
    conditions

19
Thin bituminous surfacings (A3)
  • Surface dressings
  • Concept of elv better guidance on design for
    heavy traffic volumes
  • Modified binders (applicability of design charts)
  • Database on long-term performance of seals
  • Thin-layer asphalt
  • Guidelines on their design and use
  • Fit-for-purpose certification system for
    non-conventional products
  • Cost-effectiveness of modified binders
  • Adhesion bonding to substrata

20
Structural design performance (A4)
  • Upgrading of SAMDM
  • Incorporation of input variability
    probabilistic functions in structural design
    methods
  • Integration of all mechanistic design methods
    (flexible rigid) into one method
  • Structural design analysis system accommodating
    non-uniform contact stresses and dynamic loading
  • Revision of TRH4 (including incorporation of
    rigid pavements)
  • Revision of TRH12

21
Priority-A research needs
22
Priority-B research needs
23
Quality control/assurance (B1)
  • Survey of factors and influencing issues
    impacting on quality, and the provision of
    remedial solutions
  • High-speed, non-destructive testing procedures
    automated systems for the monitoring control of
    construction quality
  • Revision of standards specification
  • Capacity building

24
Thin concrete layers (B1)
  • Design and performance
  • Engineering properties and load carrying capacity
    of thin ultra-thin concrete layers
  • APT study of high-strength thin concrete overlays
  • Guidelines on design use of thin ultra-thin
    concrete layers
  • Construction
  • Guidelines on the construction of thin
    ultra-thin concrete layers using both
    conventional labour-intensive methods

25
Lime- and cement-treated materials (B3)
  • Test methods specifications for the assessment
    of durability and erosion resistance
  • Ways to improve the working time associated with
    the new range of cements
  • Appropriate construction methods
  • Calibration of resilient performance models
    incorporating variability

26
Hot-mix asphalt (B4)
  • Validation of interim design guidelines
  • Forensic, LTPP APT studies
  • Reliable test procedures acceptance criteria
    for rutting, durability fatigue
  • Concept of aggregate packing and spatial
    composition
  • Laboratory mix preparation, conditioning
    compaction
  • Design procedures for SMA
  • Stability of mixes at intersections
  • Revision of TRH8
  • Standards specifications

27
Priority-B research needs
28
Priority-C research needs
29
Traffic loading contact stresses (C1)
  • Traffic loading
  • Accuracy of WIM measurements
  • Updating of ESALS per heavy vehicle factors
  • Investigation/enhancement of ESAL/E80 concept
  • Revision of TRH16
  • Non-uniform contact stresses
  • Quantification of effects of contact stresses on
    behaviour performance of upper pavement layers
  • Integration of non-uniform contact stresses is
    structural design systems

30
Bitumen specification Material classification
  • Performance-based specifications for bituminous
    binders (C2)
  • As directed by the RPF working group
  • Material classification (C3)
  • Improved characterisation methods for unbound
    materials, weathered gravels and soils
  • Improved design models (e.g. resilient plastic
    deformation models)
  • Revision of TRH14

31
Tar replacement Long-life pavements
  • Tar replacement (C4)
  • Investigation into suitable replacements for coal
    tar for priming, pre-coating of aggregates and
    other applications in road construction
  • Long-life pavements (C5)
  • Concept development economic viability of
    long-life pavements
  • Survey of long-life pavements
  • Strategy for long-life pavements
  • Construction materials for long-life pavements
  • Guidelines for design, construction and
    maintenance of long-life pavements

32
Structural materials Cold bituminous treatment
(A) Thin-layer concrete (B) Lime/cement
stabilised materials (B) Hot-mix asphalt
(B) Material classification (C)
Operational environment Traffic loading contact
stresses (C)
Structural design of flexible rigid pavements
(A) Long-life pavements (C)
Perf-based specs for bituminous Binders (C)
Construction Maintenance Gravel roads their
upgrading (A) Thin bituminous surfacings
(A) Quality control/assurance (B) Replacement of
tar-based products (C)
33
Way Forward
  • Focus area groups to unpack the needs identified
    identify projects
  • Need to relate the outcomes of the focus areas to
    strategic objectives of transport and national
    imperatives

34
Unpacking of needs
35
Unpacking of needs
36
Unpacking of needs Priority A
  • Cold bituminous treatments
  • RPF Working Group
  • Gravel roads their upgrading
  • (Les Sampson Phil Paige-Green to convene)
  • Thin bituminous surfacings
  • (Expansion of ASA Task Team)
  • Structural design performance
  • RPF Working Group

37
Unpacking of needs Priority B
  • Quality control quality assurance
  • ?
  • Thin concrete layers
  • (Rudi Kühn Bryan Perrie to convene)
  • Lime- cement-treated materials
  • RPF Working Group
  • Hot-mix asphalt
  • (HMA PMG or APT Task Group)

38
Unpacking of needs Priority C
  • Traffic loading contact stresses
  • (Morris de Beer PW de Bruin to convene)
  • Performance specs for bituminous binders
  • RPF Working Group
  • Material classification
  • (Dennis Rossmann Hechter Theyse to convene)
  • Replacement of tar-based products
  • (Sabita to convene)
  • Long-life pavements
  • (SA PIARC representatives to convene)

39
Way Forward
  • Alignment with strategic objectives for transport
  • Role in economic development
  • Safety and personal security
  • Increasing access and mobility
  • Public health issues
  • Environmental sustainability
  • Human resource development
  • Poverty alleviation / job creation

40
RAP Feedback (Transportek)
41
RAP Feedback (Transportek)
42
RAP Feedback (Transportek)
43
WAY AHEAD
  • Compilation of Research Master Plan
  • Focus area groups to unpack the needs identified
    identify projects (end July 2005)
  • Translate the outcomes of the focus areas to
    strategic objectives of transport and national
    imperatives (May05)
  • Secretariat to compile Research Master Plan
    (Aug05)
  • Circulate to members of PRAC for comments
    (Aug05)
  • Meeting of the Management Committee (September
    2005)
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