Individual paper (pdf - 340KB)

This study evaluated the potential applications of products derived from processing waste tyres using a Continuous Reductive Distillation (CRD) process. The focus was on Tyre-Derived Carbon Black (TDCB) as a bitumen additive and an asphalt containing TDCB. The applicability of TDCB as a binder additive was assessed by evaluating its effect on needle penetration (BS EN 1426:2015), softening point [...]

Individual paper (pdf - 579KB)

As the need for plastic recycling increases year by year, recent efforts towards carbon neutrality have also led to limitations on CO2 emissions. Consequently, thermal recycling, which constitutes the majority of recycling methods, is gaining more traction. Even material recycling, which is preferred for resource utilization, requires significant energy for processes such as recovery, sorting, and [...]

Individual paper (pdf - 980KB)

The road construction sector is responsible for a significant share of greenhouse gas emissions throughout its life cycle. Reducing this carbon footprint is essential to meet the European Union's climate neutrality goals. In this context, bio-asphalts emerge as an innovative solution by partially or fully replacing fossil-based bitumen with bio-binders derived from industrial waste and renewable biomass. [...]

Individual paper (pdf - 845KB)

This study aims to clarify how snow and ice on the road surface influence the fuel efficiency and CO2 emissions of large vehicles, and to develop a fuel efficiency calculation formula that takes into account the impact that factors related to snow and ice on road surfaces. Driving experiments using a large vehicle equipped with a fuel flow meter were conducted on a 500m straight section of the Tomakomai [...]

Individual paper (pdf - 612KB)

Cold recycling (CR) is a sustainable approach to pavement construction and rehabilitation that significantly reduces greenhouse gas (GHG) emissions by eliminating heating requirements and minimizing virgin aggregate use through material reuse. By improving mix properties with recycling agents such as asphalt emulsion and foamed asphalt, CR enables reductions in pavement thickness and further contributes [...]

Individual paper (pdf - 737KB)

In recent years, efforts have been made in various fields to recycle resources and reduce CO2 emissions to realize a decarbonized society. In the field of asphalt pavements, the promotion of asphalt recycling and warm mixture are increasing aggressively. However, long-term durability of these mixtures is still not enough clear. One of the key factors in improving the durability of asphalt pavements [...]

Individual paper (pdf - 2.3MB)

In Japan, the reduction of CO2 emissions has become an urgent issue. The targets for reducing greenhouse gas emissions are 46% from the fiscal year 2013 by fiscal year 2030, and net-zero greenhouse gas emissions by 2050. In the asphalt pavement sector, approximately 40% of CO2 emissions occur during the manufacturing process of Hot Mix Asphalt (HMA). Therefore, various initiatives are being [...]

Individual paper (pdf - 783KB)

In 2015, the Paris Agreement was adopted to address the global issue of climate change. It was agreed that the long-term global goal would be to achieve a balance between emitting greenhouse gases and absorbing them through carbon sinks in the second half of this century. The extraordinary Diet session in 2020 declared that Japan aims to achieve a decarbonized society by 2050. In response to this [...]

Individual paper (pdf - 212KB)

In the field of pavements, various efforts are being made to achieve a low-carbon society. In asphalt pavements, warm asphalt mixture technology has been proposed as a major low-carbon technology during asphalt mixture production and construction, and recycling technology has been introduced as an effective LCCO2 reduction technology. In order to make pavement infrastructure with these LCCO2 reduction [...]

Individual paper (pdf - 2.3MB)

The rapid expansion of transportation infrastructure in developing countries like Bangladesh underscores the urgent need to integrate Life Cycle Assessment (LCA) into project planning and implementation to ensure environmental sustainability and informed decision-making. This study applies LCA to estimate embodied carbon emissions across different pavement layers in the SASEC Road Connectivity Project-2, [...]

Individual paper (pdf - 841KB)

Pavement structures are a multilayered system composed of different materials where each has a role in providing sufficient load-bearing capacity and durability of such system. While surface courses, namely made from asphalt or concrete, are directly exposed to low temperatures and deicing agents, lower layers such as load bearing base and even subgrade are also adversely affected by freezing and [...]

Individual paper (pdf - 199KB)

As part of the process of drawing up its transition plan for reducing greenhouse gas (GHG) emissions, the Département du Doubs wanted to carry out specific work to decarbonise its infrastructure, as the maintenance of its road network is the main source of emissions for the local authority. This work, carried out with Cerema between February and June 2022, took place in several phases. Firstly, [...]

Individual paper (pdf - 666KB)

French road construction companies have committed, through a pledge of engagement, to implementing the measures needed to decarbonize the road industry. To this end, several levers have been identified, including lowering the production temperatures of asphalt mixtures and developing emulsion-based techniques. The PN IDEE program (Decarbonized Infrastructures with Emulsion Asphalt Mixtures), launched [...]

Individual paper (pdf - 256KB)

Emissions and aerosols from bitumen in hot asphalt mixtures can be harmful to the health of the paving workers. As a preventive measure an occupational exposure limit value (OEL) of 1.5 mg/m³ has been set in Germany for these emissions when paving hot asphalt mixtures. Two measures to reduce emissions have been proposed: Temperature reduction of asphalts and extraction systems on asphalt pavers. [...]

Individual paper (pdf - 1.2MB)

The Hawkesbury-Nepean Valley (HNV) in Western Sydney is among Australia’s most flood-prone regions, experiencing severe flood events in 2020, 2021, and 2022. These floods caused widespread disruption to homes, infrastructure, and businesses. In response, the NSW Government released the HNV Flood Risk Management Strategy in June 2021, outlining a suite of integrated measures to reduce flood risk. [...]

Individual paper (pdf - 704KB)

This paper evaluates the long-term performance of Recycled Asphalt Pavement (RAP) in a surface course trial at the A1 Mill Hill Interchange, part of the Transport for London Road Network (TLRN). In March 2016, a trial surface was laid using Stone Mastic Asphalt (SMA) incorporating 50% RAP, with a control section installed using conventional SMA without RAP. This research study presents the interim [...]

Individual paper (pdf - 582KB)

In recent years, a number of innovative asphalt modifiers have been developed, which have not only the potential to improve mechanical performance but also help reduce the carbon footprint of the asphalt. In addition, the construction sector has responsibility to protect natural resources and also to promote the circular economy through effective use of reclaimed asphalt (RA), and recycled plastics. [...]

Individual paper (pdf - 854KB)

As a measure to extend the life of pavements, the authors developed a special asphalt mixture (highly flexible mixture) that suppresses the occurrence of cracks in the asphalt mixture layer as much as possible, with the aim of preventing water from penetrating into the pavement below the base course. This technology has been demonstrated to have excellent crack suppression effects on the road in service. [...]

Individual paper (pdf - 469KB)

Faced with the growing challenges of climate change, reducing the carbon footprint of road infrastructure has become a major issue in project planning. In this context, Cerema has developed a methodological framework aimed at harmonising and making reliable the assessment of greenhouse gas (GHG) emissions from road projects. This report proposes an approach for integrating this assessment right [...]

Individual paper (pdf - 1.0MB)

Rolling Resistance is a force resulting from the dissipation of energy caused by viscoelastic deformation of the rubber located in the tire sidewalls and in the tire/road contact area. It concerns every rolling vehicle and is responsible for a non-negligible part of its fuel consumption. Reducing rolling resistance can thus be a way to decrease the carbon impact of roads infrastructures but must be [...]

Individual paper (pdf - 786KB)

This study evaluates the potential application of fuel oil products derived from processing waste tyres at high temperatures (500-600 °C) using a Continuous Reductive Distillation (CRD) process. The products assessed include Tyre-Derived Fuel Oils (TDFO) and Tyre-Derived Heavy Oil Residue (TDHOR). The study analysed the suitability of the fuel oils obtained, which constitute 35-40 wt.% of the total [...]

Individual paper (pdf - 805KB)

When designing a construction method and selecting the individual construction materials, the topics of sustainability, climate protection and resource conservation are becoming increasingly important in asphalt road construction. The current situation in road construction, i.e. increasing raw material prices and simultaneously decreasing availability of primary construction materials, will increase [...]

Individual paper (pdf - 476KB)

A new highway construction project in Armenia, a critical infrastructure development, faces significant climate-related challenges. This study investigates the project's environmental impact, with a particular focus on greenhouse gas (GHG) emissions, and explores strategies for mitigation. The modelling is supported by a digitised approach of Life Cycle Assessment (LCA) in line with ISO 14040/44 as [...]

Individual paper (pdf - 996KB)

The embodied carbon associated with bitumen production is a key contributor to the overall carbon footprint of asphalt, representing more than a quarter of the total. Bio-based binders are one of the emerging low-carbon technologies with the potential to mitigate this impact. These binders involve the modification or partial replacement of traditional petroleum-refined bitumen with a biogenic component. [...]