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XXVIIth World Road Congress
Pre-proceedings of the Congress

Topic 40. Innovative maintenance methods and strategies

    Aikaterini VARVERI

    The construction and maintenance of roadway infrastructure require large proportions of virgin raw materials and contributes significantly to greenhouse gas emissions and depletion of natural resources. As a result, road authorities are transitioning towards using recycled materials for pavement construction to efficiently manage material flows and maintain the utility of pavements for a prolonged [...]

  • IP0309 - A new compaction process - The tooth compactor
    Jean Claude MEDINGER

    The principle developed here consists of compacting a layer, composed of several elementary layers superimposed one on top of the other, from bottom to top, instead of compacting only the surface. The tool, consisting of a cylindrical pan inclined backwards, is carried, engaged in the ground, and driven by translation (ripper) or translation-rotation (rotor). The deformation imposed at the hollow [...]

  • IP0222 - Adding environmental aspects into pavement management systems – the next step for future oriented decision making

    During the last 20 years many countries around the globe implemented holistic pavement management solutions, using life-cycle cost analysis for the current generation and assessment of maintenance treatment programs on both object and network level. Either budgetary constraints or level of service preconditions are mainly the basis for the decision makers, focusing on the budgetary aspect as the main [...]

  • IP0263 - Advanced and Innovative Engineering Training for Efficient and Rational Maintenance Skills of Highway Doctors.
    yamazaki KAZUYA

    We have established Technical Training Center (TTC) as an advanced training facility to improve the capabilities and skills of Highway Doctors (Road inspection engineers) along with the innovation and progress for road maintenance technologies. Japan's expressways having 60 years history is now in the operation and maintenance stage, and inspection and surveillance works are getting more important. [...]

  • IP0369 - An Implementation of ICT to an Expressway Construction Work looking forward to the Maintenance Phase
    Naoki ISHIKAWA

    International trends of utlizing ICT have shown remarkable progress in recent years, and the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) in Japan is promoting the “i-Construction” initiative. East Nippon Expressway Company, Limited (NEXCO East), which has constructed and maintained highways in the Eastern part of Japan for more than 60 years, is also making various efforts toward [...]

  • IP0691 - Bonus System Contract – smart motivator for improving paving quality and sustainability
    Anti PALMI , Marek TRUU

    Estonian Transport Administration started piloting of Bonus System contracts (BSc) in 2018 with 3 first contracts supported with study “Analysis of Bonus System Contract Pilot Projects in State Roads 2018”. In 2019, number of contracts was increased to 10 and after successful implementation, use of BSc was widened to most of construction contracts that included paving in Estonian state roads. [...]

  • IP0143 - Correlation between the Behavior in Service of an Asphalt Pavement in a Height Area and Laboratory Parameters with Performance Tests
    Rodolfo Adrián NOSETTI

    The characterization through performance tests of two asphalt mixtures is reported in this communication, which were used as base and bearing layers in two contiguous route sections in Bolivia, in high altitude, with an elevation range from 3800 m.a.s.l. up to 4500 m.a.s.l., and which were made up of aggregates of different origin and the same asphalt binder. Although both mixtures generally complied [...]

  • IP0191 - Development of automatic placement LED road flares
    Kazuki FUJISAKI

    Expressway maintenance workers are exposed to various dangers during their works, and ensuring safety is the most important issues in expressway management. For example, the placement of road flares on traffic lanes for temporary traffic control operations is one of the most dangerous works of expressway maintenance workers. When maintenance crews regulate lanes for pavement improvement or handling [...]

  • IP0076 - Development of the double-layer type precast concrete paving system
    Yokoyama TAKAHIRO , Mitsutani SHUUHEI

    The productivity of a large-scale building construction is significantly improved in these days by utilizing prefabricated components. On the other hand, prefabricated paving panels are not adopted well in road construction, since it is hard to build smooth road surface with connecting prefabricated paving panels and it is hard to follow the designed line and grade. Also, it is relatively more expensive [...]

  • IP0084 - Efficient construction management using information and communication technology on Japanese expressways
    kazumasa KAWAMURA

    Japan has an aging society and a declining birthrate. As a result, the productive-age population between the ages of 15 and 65 is decreasing, and it is expected that it will be difficult to secure young workers in the field of road construction in the future. Since the number of workers is decreasing, Japan must maintain or improve the productivity of road construction sites, which are important for [...]

  • IP0169 - Evaluation method for stripping resistance of asphalt

    Over twenty years have passed since the porous asphalt pavement (PAP) was adopted in Japan as the standard asphalt surface on expressways to improve slip resistance, reduce hydroplaning during rainfall events, and lower noise for residents living near expressways. Since then, PAP distress has been primarily attributed to the stripping of asphalt in the binder course of expressway pavements due to [...]

    Kengo MORI

    A large number of steel decks are used in urban expressways in Japan, and in the Hanshin Expressway, and many trough rib steel decks that have been in service for nearly 40 years are showing significant fatigue damage. In particular, cracks that originate from the weld root between the steel deck plate and trough rib and penetrate toward the deck (hereinafter referred to as "through-deck cracks") [...]

  • IP0193 - Influence of climatic factors on moisture variations in unbound pavements with sprayed seals

    Moisture can be identified as one of the major reasons for road failures happening all over the world. In Australia, a major share of surfaced roads is constructed with sprayed seals as the wearing course, resulting in a low initial cost compared to asphalt sealings. Unbound pavement with thinly sprayed sealant is particularly common in rural areas of Australia and several other countries, such as [...]

  • IP0265 - Influence of solar energy on the dry back process in road pavement construction: An experimental study
    Gopoojithaa ATHMARAJAH

    Billions of dollars are spent on road maintenance and rehabilitation operations annually. Unbound granular pavements are the most common type of pavement that comprise a major part of the road networks in Australia, New Zealand and USA. Moisture content is one of the crucial factors that can alter the performance of unbound granular pavements in terms of strength and stiffness. Adequate moisture in [...]

  • IP0700 - Innovative Design Methodology of Recycled Asphalt Mixtures with Emulsion Based on Performance Indexes
    Guillermo Alfredo FLORES CUEVAS

    One of the main objectives in the design of asphalt mixtures is to improve the mechanical and volumetric properties of the mixture to prolong the service life. the recycling of cold mixtures with emulsion presents excellent environmental advantages, however, its properties are still not comparable to those of a conventional hot asphalt mixture. The complexity of cold mix design has led to design methods [...]

    Sandra LOPES

    This case study presents the operational tools used by Infraestruturas de Portugal (IP), the Portuguese Road and Rail Infrastructure Manager, to achieve a holistic view of road network maintenance, noting their effectiveness in relation to the Pavements asset, demonstrated by global indicator of the functional condition, and their evolution over time to accommodate the needs for structural interventions, [...]

    Alvaro DUARTE

    Address the evolution of the procedures for the winter maintenance and their integration on two O&M performance based contracts, where the main task of the contractor is to ensure the correct operation of the roads’ network, ensuring the mobility of the road users, whilst performing the remaining Maintenance tasks. The integration of different and several smart systems for control and monitoring [...]

  • IP0589 - Methods of condition monitoring and subsequent appropriately chosen maintenance to extend the service life of cement concrete pavements
    Jiří HLAVATÝ

    One of the basic methodologies for the maintenance of cement concrete pavement covers in the administration of the Road and Motorway Directorate of the Czech Republic is the "Methodology for Maintenance of Cement Concrete Covers". This methodology specifies a procedure for the maintenance of cement concrete covers during their service life in order to extend their service life. It establishes a uniform [...]

  • IP0435 - Monitoring the quality of the cement - concrete pavement by the Road and Motorway Directorate of the Czech Republic (ŘSD ČR)
    Tomáš KARTOUS

    The ?SD ?R manages highways with a cement-concrete pavement. As a part of regular and irregular inspections, defects are detected that do not correspond to the age of the pavement. This can affect the service life of the pavement. A similar problem with a disproportionately fast degradation of concrete pavement is also being solved in other countries. The first stage of the defect is a breaking [...]

  • IP0104 - Next Generation Concrete Surface Treatment for Exposed Concrete Pavements
    Damien BATEMAN

    Traditional concrete pavement surface maintenance typically consists of localised repairs, replacement of failed concrete bays, and retexturing and/or resurfacing to maintain skid resistance levels. The application of thin asphalt overlays is widely used in the UK as it offers high levels of skid resistance, improved ride quality and reduced road noise. However, site specific factors may affect [...]

  • IP0480 - Pavement Survey using 3D laser cameras. Severity analysis and quality indicators classification worldwide.

    The use of 3D laser inspection systems is becoming a standard for measuring the surface condition of pavements due to the advantages they offer over conventional techniques. Worldwide, these systems are used for the analysis of pavement deterioration (potholes, cracking, repairs) as well as for the measurement of transverse profile, texture and longitudinal regularity (IRI). The pavement image recognition [...]

    Sandra LOPES

    This case study aims to present an operational solution for road pavement interventions, integrated in a maintenance management perspective, explaining its assumptions and applicability, highlighting the technical and economic advantages that can be derived from this to increase the pavement’s service life; delaying the need for major structural interventions, with advantages in the good management [...]

  • IP0587 - Road maintenance strategies in Bratislava Region
    Martin SAMEK

    The Bratislava region, as the most economically developed region near the capital of the Slovak Republic, Bratislava, has its specificities in the form of the greatest intensity of road traffic within the entire country, an important transport hub connecting the regions of the Czech Republic, Austria and Hungary, and to a large extent ensuring the area's transport services through the regional road [...]

  • IP0387 - Road performance measurements by IRI
    Abdelkrim DERRADJI

    Road network managers increasingly use performance measures. Defined as a process for evaluating progress in achieving predetermined objectives, performance measures allow managers to assess the effectiveness and efficiency of programs, and to plan improvements as needed. Performance metrics now extend to applications in construction and maintenance management systems as well as operations and safety [...]

  • IP0644 - Smart paver : a real time unevenness monitoring
    Aymane GOURIMATE

    Road profile is inherently uneven due to defects that may come from construction or rehabilitation processes. In addition, road deterioration that occurs during its life leads to increase surface unevenness. During the construction or the repaving of the road, surface unevenness may be generated by both of paving methods and equipment. Then, unevenness will increase during service-life due the exposure [...]

  • IP0270 - Trends in Practical Application of Minibus-Size Moving Wheel Deflectometer in Japan
    Jun UMEDA

    For pavement maintenance management, in order to evaluate the pavement structural soundness at the network level, testing equipment that continuously measure pavement deflection while moving has been developed in several countries. In particular, many trailer-sized moving deflectometers are being developed, but because Japan has many mountainous areas and its roads are often very narrow and have many [...]

  • IP0448 - Updating of the design and sizing catalogue for new pavements in Côte d'Ivoire and first experiences with in-place recycling.
    N'Mandy Flore GUE

    The Ivorian road network includes 82,000 km of roads in 2020, of which 6,654 km are paved roads and more than 75,000 km are dirt roads. The classified network is completed by more than 200,000 km of agricultural dirt roads. Côte d'Ivoire is facing several challenges: the creation of new infrastructure to cope with the growing and often overloaded heavy traffic on the transnational axes of the West [...]

  • IP0277 - Whitetopping and Ultra-Thin Whitetopping applications in the Czech Republic
    Bohuslav SLANSKY

    The paper is about the first applications of Whitetopping technologies in the Czech Republic - one of the efficient and sustainable technologies for a reconstruction of traffic areas and pavements. The technology utilizes the residual baring capacity of an existing pavement and replaces only thin pavement layer by thin concrete pavement. The pilot applications were done for reconstruction of two motorway [...]