Title: ROAD PAVEMENT RESEARCH ADVISORY COMMITTEE BMJA Verhaeghe 12 MAY 2005
1ROAD PAVEMENT RESEARCH ADVISORY COMMITTEEBMJA
Verhaeghe12 MAY 2005
NINTH MEETING OF THE ROAD PAVEMENTS FORUM (RPF)
2Resolution 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
3Presentation outline
- Background
- Purpose Structure
- Prioritisation of research needs
- Synthesis of research needs
- Prioritisation process
- Way Ahead
- Discussion
4Background 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
5Background 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
6Background 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
7Background 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
8Background 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
9Prioritisation 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
10Prioritisation 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)
11Needs in Infrastructure Engineering
137 Identified Research Needs
12Needs in Infrastructure Delivery
38 Identified Research Needs
13Tentative 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
14Tentative 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
15Tentative Priorities
- Priority C-rating
- Quality control quality assurance
- Impact of climate
- Long-life pavements
16Priority-A research needs
17FBT 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
18Gravel 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
19Thin 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
20Structural 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
21Priority-A research needs
22Priority-B research needs
23Quality 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
24Thin 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
25Lime- 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
26Hot-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
27Priority-B research needs
28Priority-C research needs
29Traffic 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
30Bitumen 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
31Tar 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
32Structural 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)
33Way 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
34Unpacking of needs
35Unpacking of needs
36Unpacking 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
37Unpacking 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)
38Unpacking 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)
39Way 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
40RAP Feedback (Transportek)
41RAP Feedback (Transportek)
42RAP Feedback (Transportek)
43WAY 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)