COST 347 Work Package 4

1
COST 347 Work Package 4

• Common Code of Good Practice for the Application
  of ALT
• Presented by
• Arthur van Dommelen,
• Road and Hydraulic Engineering Institute
• the Netherlands

2
Overall WP 4 Objective

• To develop guidelines for
• improved use of existing ALT facilities
• more efficient experiments (by better design of
  experiments, data handling, selection of
  equipment etc)
• easier interchange of ALT results (by
  standardization of testing and reporting
  procedures)
• construction of future ALT facilities (or
  improvements of existing facilities)

3
Main Elements of WP 4 report

• (Introductive chapters Preface Abstract
  Executive summary Introduction)
• The role of ALT in modern pavement engineering
• Research topics to be tested in ALT facilities
• Accelerated testing in existing ALT facilities
• Future or improved ALT facilities
• Research topics not suited for ALT
• (Concluding chapters Summary, Conclusions and
  Recommendations References Appendices)

4
WP 4 Recommendations

• Twelve practical recommendations have been
  produced, each stating
• Aim of recommendation
• Importance of recommendation
• Mandatory actions
• Recommended actions
• References to literature with practical examples

5
WP 4 Recommendations
6
WP 4 Recommendations

• Planning of experiment
• Design of experiment pavement type,
  deterioration mode to be analysed, time sequence
  etc.
• Test pavement
• Selection of pavement, construction of pavement
• Pavement Instrumentation (COST 347 WP 2
  Inventory)
• Type, installation, calibration
• Construction practice
• Procedures and tests to monitor the construction
  process

7
WP 4 Recommendations (continued)

• Pavement condition testing
• Selection of tests regarding profile, bearing
  capacity, surface defects
• Loading
• Selection of loading parameters frequency, load
  level (static, dynamic), velocity, direction,
  wander
• Climate
• Monitoring or control of temperature,
  ground-water level, freeze/thaw, ...

8
WP 4 Recommendations (continued)

• Supplementary laboratory testing
• What laboratory tests should be carried out in
  support of ALT
• Exhumation
• Investigation of pavement after tests (coring,
  saw cutting,.)
• Data
• Acquisition, storage, format, results analysis

9
Additional recommendations

• Operational safety, public hindrance,
  environmental effects
• Avoiding negative effects of ALT
• Staffing
• Expected need for staffing regular staffing,
  staffing for specific research projects
• Economy
• Costs, benefits for facility owners, sponsors,
  road users

10
Role of ALT ALT research in past 25 years

• Input from COST 347 WP2 Previous and current
  research in the field of ALT
• Inventory of 60 research projects, divided over
  the following research items
• materials testing pavement design
• performance models test validation
• wheel load effects pavement maintenance
• environmental effects others

11
Role of ALT research topics statistics
12
Role of ALT in overall research strategy

• Available research tools
• Desk studies
• Laboratory testing
• Modelling
• ALT
• RLT
• Small scale ALT

13
Role of ALT for different research topics
14
Present/near future road construction issues

• Sustainability issues
• Reduced use of natural materials and energy in
  pavement construction
• Improved use of recycled of materials
• Mobility issues
• Reduced need for pavement maintenance (also
  relevant from sustainability and environmental
  point of view)
• Reduced functional deterioration (surface
  defects, skid resistance, light reflection)
• Reduced structural deterioration
• Environmental issues
• Noise
• Runoff

15
Not to be tested with ALT

• Skid resistance, light reflection
• Pavement deterioration modes which are mainly
  depending on ageing
• True traffic loading spectrum
• True variation of climatic conditions
• The combination of both
• Specific material properties (but ALT can verify
  relevance of properties from laboratory testing
  for pavement behaviour)

16
Future or improved ALT facilities

• No immediate need for more ALT facilities in
  Europe
• Most facilities can, or can be modified, to
  accommodate most types of research
• More co-operation between existing facilities to
  complement each other can further improve this
  situation

17
WP4 members

• DRI (Denmark)
• CDV (Czech Republic)
• LCPC (France)
• IBRI (Iceland)
• DWW (The Netherlands)
• The University of Iasi (Romania)
• CEDEX (Spain)