Abstract. NOx emissions commonly emitted by vehicles, pose environmental and health challenges worldwide. Photocatalytic asphalt pavements, used in urban settings, are in close contact with these emissions. In this study, the contribution and role of asphalt mix components—stone and bitumen—were analyzed in the degradation process. The effectiveness of TiO2 coatings on limestone-bitumen...
Abstract. The importance of road pavement durability must not be underes-timated, as it impacts road safety, reduces maintenance costs and environ-mental impacts. The constant exposure of wearing courses to atmospheric agents such as UV-rays or rain, and traffic-induced stresses, contribute to accelerated wear and deterioration. The aging behaviour of the binder used plays a crucial role in...
Abstract. Many types of nanomaterial, such as nano-TiO2, nano-Al2O3 are frequently used for modifying asphalt to enhance its pavement performance. However, conventional nanomaterials often exhibit limited compatibility with asphalt. This problem can be improved by using solvent-free nanofluids. Solvent-free nanofluids are engineered by surface functionalization of conventional nanomaterials,...
Abstract. Nowadays, road maintenance and rehabilitation strategies repre-sent important budget investments worldwide as a result of the need for suitable pavement structures. The selection of alternative materials for more efficient and durable solutions is therefore imperative through research ini-tiatives and field projects. In response to these requirements, this paper re-ports the main...
Abstract. The fatigue life of the bituminous pavement is influenced by the fatigue behavior of each of its constituents. This study focuses on the fa-tigue behavior of bituminous material at two scales: bitumen and mastic. Conventional methods to determine the fatigue life of bitumen using time sweep tests make use of post-processing techniques established for bitumi-nous mixtures and these...
Abstract. The research work presented in this paper focused on the evaluation of failure properties of asphalt binders at low temperatures by monotonic torsional loading (MTL) test. By making use of conventional dynamic shear rheometers, cylindrical specimens of binders (4 mm diameter and 5 mm height) were subjected to monotonic shear loadings until rupture at constant temperature and strain...
Abstract. Due to the oil prices and the consequent impact on the cost of asphalt, importing this product has been an alternative in Brazil. The imported asphalts are packaged in the form of blocks in a solid state, and their management for use represents a challenge to face. This study presents a methodology developed in Brazil for using imported asphalt in blocks. Also, the performance...
