Advancement in Pavement Maintenance Technologies to Meet Road Users Expectations
Workshop Chair: Jeffrey L Lee, Ph.D., Australian Road Research Board, Australia
Speakers: Xu Jian, John Roberts, Wynand Steyn and AAPA Representatives
Pavement maintenance is important to preserve the structural capacity and serviceability of the road network. A well-maintained road network will provide a smooth and quiet trafficking surface for road users, improve road safety, and substantially reducing the road user and long-term maintenance costs. Road authorities around the world face the challenge to use the available road maintenance funds to select the most appropriate pavement maintenance treatments and prioritize maintenance treatment strategy. The concept of perpetual pavement and its implementation in the context of Australia will also be presented in this workshop.
In recent years, new pavement maintenance technologies have become available to meet the above challenges. Advanced pavement maintenance technologies become readily available for both asphalt and concrete pavements. This workshop aims to share the latest technologies and also to discuss the importance of including road user’s costs and road user’s experience when making road maintenance decision.
Four keynote speakers will share different maintenance and planning technologies that have been developed around the world: Dr. Xu Jian at Research Institute of Highway, China; Mr. John Roberts at International Grooving & Grinding Association, USA; Dr. Wynand Steyn at University of Pretoria, South Africa; and representatives from the AAPA Representatives, Australia. The topics for the four presentations include:
- Development and prospect of asphalt pavement maintenance technologies in China
- The concrete industry’s road to quiet, sustainable pavement – the next generation of concrete surfaces (NGCS)
- Road-user based decision making for road maintenance
- Development and Implementation of Perpetual Pavement Design Method in Australia
1) Xu Jian, Ph.D., Professor at the Research Institute of Highway (RIOH), China
Xu Jian, Ph.D., professor of Research Institute of Highway(RIOH), secretary-general of Branch of Road Engineering, China Highway and Transportation Society(CHTS), and secretary-general of Branch of Material Recycling for Road Engineering, China Association of Circular Economy(CACE). His major research interests include pavement maintenance technologies such as micro-surfacing and pavement recycling, and energy-saving and emission-reduction technologies such as warm mixture.
He was involved in many of MOT specifications such as Technical Specifications for Highway Asphalt Pavement Recycling, Quality Inspection and Evaluation Standards for Highway Maintenance Engineering, technical guidelines for micro-surfacing and slurry seal. He undertook or involved in more than 40 various levels of research projects, some of which listed in the national science and technology support program and the international scientific and technological cooperation plans. He has published over 50 papers and 7 scholarly monographs, obtained 3 patents for invention, and achieved 7 ministerial level academic rewards.
Summary: Since the beginning of this century, China's highway development has entered the stage of "maintenance sharing equal importance as new infrastructure construction", and the asphalt pavement maintenance technology has been developing rapidly. This presentation will cover:
- The development process of expressway pavement maintenance technology of China in recent 20 years, including the preventive maintenance concept, maintenance technologies such as micro-surfacing, slurry seal, fog seal, ultra-thin overlay, pavement recycling, melting ice and snow technology.
- The status of research, application, specifications of these technologies will be summarized, the demand for pavement maintenance and the future development trends of the road maintenance technologies will be analyzed.
2) John H. Roberts, Executive Director at the International Grooving & Grinding Association (IGGA), USA
John Roberts is the Executive Director of the IGGA, and Vice President of the American Concrete Pavement Association’s (ACPA), Pavement Restoration Division. Before joining the IGGA/ACPA, John was employed by Ebasco Services Inc., where he worked on projects ranging from radioactive cleanups to reconstruction of the Manhattan Bridge. John was also the owner of a concrete contracting company located in New York where he specialized in the construction of bridges, pavements, and structures. John was an honor student graduating from Rensselaer Polytechnic Institute, Magna Cum Laude with a B.S. in Civil Engineering
Summary: The concrete pavement industry has been working at a vigorous pace to proactively address issues centering on concrete pavement surface characteristics including tire/pavement noise, smoothness, and friction. After nearly a decade of research, the industry has developed a class of surface textures aptly named, the Next Generation Concrete Surface (NGCS). This class of textures originally conceived at Purdue University offers the quietest concrete pavement surfaces ever developed. This presentation will cover:
- A brief history of the concrete pavement industry’s journey in developing improved functional performance;
- A review of key research initiatives related to the development of low noise concrete surfaces;
- A review of the data associated with laboratory and field trials that have been conducted to date;
- Recent strides in the development of the NGCS;
- Best practices and construction techniques of the NGCS.
3) Wynand Steyn, Ph.D, Professor at the University of Pretoria, South Africa
Prof Wynand Steyn is Head of Department (HOD) of the Department of Civil Engineering and full professor (focusing on road pavement related subjects) at the University of Pretoria. He is a professionally registered pavement engineer with a research interest in vehicle-pavement interaction, accelerated pavement testing, pavement engineering, pavement materials and instrumentation. He has authored, co-authored and edited 27 journal papers, 20 book chapters (author / co-author / editor) and 97 conference papers. He is Associate Editor of the International Journal for Pavement Engineering and has a B3 National Research Foundation (NRF). He is a Member of the South African Institution of Civil Engineers and a Fellow of the South African Academy of Engineering.
With the principle that the road user is the ultimate client of the road owner, and that the road user’s costs and experience using the road is an important factor in decision-making regarding the provision and maintenance of road infrastructure in mind, the decision-making parameters regarding the scheduling of road maintenance can be re-evaluated.
This presentation will focus on specifically how response type roughness data and cargo damage due to inadequate riding quality can affect the maintenance planning of roads in agricultural regions of a country. The presentation will refer to response type monitoring of the road condition by the vehicle using it, as well as models developed for the quantification of the cargo damage caused due to inadequate riding quality. Examples will be shown of how road-user based decision making can become part of the maintenance planning of a road owner in a quantified way. Topics covered in this presentation will be:
- Response type road condition measurement
- Cargo damage due to inadequate riding quality
- Quantification of damage costs to road user and effects of adequate road maintenance
4) Representatives from the Australian Asphalt Pavement Association (AAPA), Australia
Summary: In 2011 the Australian Asphalt Pavement Association (AAPA) commenced the Asphalt Pavement Solutions for Life (APS-fL) project. This project was initiated to address the concerns of clients, consultants and industry that current pavement design procedures were producing overly conservative asphalt thickness requirements. The presentation will cover the development of a “threshold” strain or Fatigue Endurance Limit (FEL) below which no damage occurs, for use within Australian design practice. The work included characterization of local materials and validation of the design concepts against international accelerated pavement testing and field data. By using this approach, the limiting thickness of asphalt pavements can be obtained with confidence for the full spectrum of circumstances encountered in Australian projects. Recently the Austroads Guide to Pavement Technology has been updated to reflect the perpetual pavement design concept. Perpetual pavement design is now actively considered for major infrastructure projects in Australia.