In this study, the focus was on analysis of asphalt binder aging, a complex process that induces physical, chemical, and rheological changes in these materials, affecting performance mixtures over time. While thermal-oxidative aging is well-documented, aspects photo-oxidative influence moisture are frequently overlooked. The investigation assessed 50/70 underwent short-term long-term both laboratory field climatic conditions Brazil. Initially, binders using Rolling Thin-Film Oven (RTFO)...

The pavement industry has been increasingly encouraged to adopt a more circular approach, associating economic development with responsible use of natural resources, due the significant impacts that its activities impose, particularly on environment and financial resources. One practice aligned economy trend is Reclaimed Asphalt Pavement (RAP) in asphalt mixtures. Several methods have adopted increase amount RAP without compromising mechanical performance recycled mixtures, particular...

Warm mixtures are an essential alternative for paving as they minimize costs and environmental impacts, their performance is similar to hot mixtures. This research evaluated the effect of adding linseed oil obtained from Linum usitatissimum in contents 1, 2, 3, 4, 5, 6% by weight on physical rheological properties asphalt binder. The binder was through tests penetration, softening point, rotational viscosity, grade (PG); these were performed before after short-term aging procedure; multiple...

One of the by-products oil industry that is disposed in nature as waste well gravel. When improperly of, it pollutes soil, deteriorates urban landscape, and constitutes an environmental liability if destined for landfills without prior treatment. As a way reusing gravel from wells, this research proposed using filler hot asphalt mixtures. This study evaluated mixtures dosed with 2% by Superpave methodology. The was partially replaced (1% 1% lime) totally (2% gravel), compared to use lime...

Dark colors aggravate the absorption and accumulation of heat in urban centers layers asphalt coating. These problems can be minimized by incorporating materials that increase albedo on these pavements. The use waste industry has been encouraged, an alternative is iron ore tailing (IoT), whose material comes from processing ore. circular economy encourages a change disposal after project decommissioning, encouraging transformation, reuse, recycling waste. Therefore, this research...

Modification of asphalt binders incorporating polyethylene terephthalate (PET) residues can improve their physical and rheological characteristics while providing secondary environmental benefits. This study evaluated the result addition Micronized PET (MPET) in contents 2 3% Petroleum Asphalt Cement with 50/70 penetration (PAC 50/70). The binder properties were through tests, softening point, rotational viscosity, ductility, infrared spectroscopy, performance grade, multiple stress creep...

Aiming to ensure greater well-being of the population, aim is mitigate accumulation heat in urban centers, which intensified by phenomenon known as Urban Heat Island (ICU), characterized increase temperatures comparison rural areas, due dark color and low reflectivity paved surfaces. To minimize such an impact, it suggested use materials that absorb less heat. This explains, choice for incorporating iron oxide asphalt mixtures, red yellow pigments, with purpose increasing consequently...

The effectiveness of incorporating fatty acid (SSFA) and soybean oil sludge (SS) as rejuvenating agents, encapsulated via ionotropic gelation alginate with calcium, was investigated in this study. Four variations capsules were produced: C/SS0.1, C/SS0.2, C/SSFA0.1, C/SSFA0.2, rejuvenator/water ratios ranging from 0.1 to 0.2. These then introduced at 0.6% the total weight into mixture. Initial assessments focused on capsule properties their incorporation mixtures. Impact evaluations included...

Um dos parâmetros mais indicados para representar a deformação permanente das misturas asfálticas é o Flow Number (FN). O custo relativamente alto execução de ensaios e ausência normativa que exija impede seu uso sistemático em projetos asfálticas, reforçando necessidade da busca uma relação entre os fatores inerentes à mistura permanente. Modelos regressão são utilizados na maioria estudos, porém, correlações insatisfatórias com resultados reais comuns grande parte modelos empíricos....

The aging of asphalt materials causes physical, chemical, and rheological changes that lead to pavement deterioration reduced performance, affecting service life. impact from ultraviolet (UV) radiation, particularly in combination with moisture, is still not fully understood, the latter being a factor great relevance because its potential cause premature degradation. This study evaluated fatigue behavior binders using Glover-Rowe binder parameters mechanical mixtures through indirect tensile...

Lignin is a natural polymer that has antioxidant properties. However, supplied lignin's physical, chemical, and rheological behaviour will differ from the source. Thus, objective of this work was to investigate mechanical performance asphalt mixtures produced with binders modified by lignins at contents 0, 3, 6, 9%, pinus eucalyptus sawdust. The were evaluated performing Splitting Tensile Strength Test, Lottman, Resilient Modulus, Dynamic Modulus. results pointed lignin, both tested, as good...

The role of the adhesion layer on pavements is to guarantee that structure works as a monolithic system, making it difficult for early cracks appear due fatigue or slipping. Thus, this work investigated factors influencing adherent behavior between micro-surfacing and asphalt concrete. Leutner shear strengths were analyzed at interface with bonding paint using RR-1 C, RR-2 RC1C-E emulsions three application rates (0.5 l/m², 0.75 1.0 l/m²). Tests performed temperatures (10 °C, 30 50 °C)....