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...

O desenvolvimento sustentavel faz com que pesquisadores e orgaos de infraestrutura rodoviarios busquem alternativas tragam beneficios, nao so no âmbito ambiental, como social economico. A utilizacao do material resultante da fresagem revestimento pavimentos deteriorados, incorporado as novas misturas em substituicao aos agregados novos, contribui para a reciclagem pavimento. Essa alternativa minimiza exploracao recursos naturais renovaveis, fornece uma destinacao adequada residuos, alem...

This study investigated the incorporation of soybean oil, first in ranking Brazil production, a partial substitution to two types asphalt binder (pure and with Styrene–Butadiene–Styrene – SBS) order produce warm-mix (WMA). The oil was incorporated into conditions: new waste, mix obtained 1%, 2% 3% oil. samples were analysed using tests penetration index, softening point, rotational viscosity, performance grade (PG), multiple stress creep recovery (MSCR). results show that addition 1% content...

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...

Abstract This article addresses gender issues in the context of professor’s productivity grants (PQ) distribution applied to Civil Engineering. It contributes with reflections on advancement knowledge and equality through inclusion integrity holistic aspects. A quantitative descriptive data analysis public documents revealed that number women civil engineers is considerable, female professors engaged postgraduate are capable competing for scholarships. Nevertheless, less than 20% PQ...

O solo é considerado um material de suporte e compõe as camadas do pavimento. Portanto, ele deve possuir características que conferem estabilidade resistência mecânica aos esforços decorrentes tráfego durante a vida útil Quando os solos não possuem exigidas pelos projetos, técnicas estabilização podem tornar o natural adequado para requisitos rodovias. Com base nessa premissa, este estudo teve como objetivo avaliar eficácia da associação polímeros na uso em pavimentos rodoviários. Foram...

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...

The sewage treatment plants generate, as by-products, large amounts of sludge containing harmful elements to the environment. This paper investigates possibility using 10% by weight in pavement base layers. soil stabilization technique was used improve residue properties satisfy minimum requirements for road bases. intent this use conventional additives cement, lime, and emulsion. main objective evaluate strength behavior modified soil. Sludge-soil mixtures with different additive contents...

The use of asphalt binders modified by nanomaterials has been studied to minimize premature deterioration the surface layer pavements also caused increases in traffic volume without adequate control axle load and tire pressure. Whereas usual modifiers, such as polymers, rubber, fillers, may provide limited improvement service life resistance rutting mixtures. Zinc oxide (ZnO) is an activator chemical accelerations UV absorbers. Its properties depend on its microstructure are mainly...

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....

Embedded encapsulated rejuvenators have been proven to enhance the crack-healing ability of asphalt. This healing mechanism is autonomous as it triggered by energy resulting from axles’ passages on road: an advantage over other engineered methods. However, compared advances crack externally methods, understanding action rejuvenating agents still evolving. Based findings García et al. (2020b) optimum damage level heal reflective cracking in asphalt mixtures with calcium-alginate capsules,...

Reducing dependence on specific types of vegetable oils for Reclaimed Asphalt Pavement (RAP) rejuvenation is critical. Babassu oil, extracted from palm trees, emerges as a promising candidate. This study evaluates the addition babassu oil to asphalt binder (penetration grade 50/70) in proportions ranging 1 % 12 %. Both direct and incorporation part modified long-term aged were tested. A total 41 samples underwent physical rheological testing, complemented by aging protocols. The findings...