Asphalt Binder
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. The use of thermoplastic rubber type styrene-butadiene-styrene asphalt cements oil / O emprego de borracha termoplástica tipo estireno-butadieno-estireno em cimentos asfálticos de petróleo
Este trabalho apresenta resultados o estudo de pesquisa e desenvolvimento de misturas de polímeros em cimento asfáltico de petróleo. O asfalto é um excelente material aglutinante utilizado na construção de rodovias e vias urbanas, entretanto o aumento do número de veículos comerciais e da carga transportada por eixo tem levado a deteriorização prem
Publicado em: 2010
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14. Evaluating permanent deformation of asphalt mixtures: field performance and laboratory data. / Estudo de deformação permanente em trilha de roda de misturas asfálticas em pista e em laboratório.
Dentre os diversos tipos de defeitos estruturais a que um pavimento está sujeito, a deformação permanente em trilha de roda da camada de rolamento é um dos mais importantes, pois além de propiciar uma degradação acelerada da estrutura do pavimento, ele reduz consideravelmente a segurança do usuário. Este trabalho pesquisa os processos que levam à d
Publicado em: 2010
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15. ANÁLISE LABORATORIAL DE MISTURAS ASFÁLTICAS ABERTAS USINADAS A QUENTE COM A UTILIZAÇÃO DE DIFERENTES LIGANTES
This research Project was conceived with the objective of comparing the performance of three open graded asphalt mixes, all three with the same aggregate gradation for all dosages, on which three different asphaltic binders were used; one conventional binder, one with the addition of co-polymers SBS and another one modified by the addition of ground rubber f
Publicado em: 2009
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16. Polycyclic aromatic hydrocarbons from asphalt binder: extraction and characterization
O ligante asfáltico de petróleo é comumente empregado na pavimentação de ruas e estradas de rodagem. Esse material contém hidrocarbonetos policíclicos aromáticos (HPAs) e diversos outros componentes alifáticos e aromáticos. Os HPAs são compostos poluentes que podem induzir problemas de saúde. Este trabalho tem como objetivo extrair e caracterizar
Journal of the Brazilian Chemical Society. Publicado em: 2009
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17. CaracterizaÃÃo de ligantes asfÃlticos modificados com borracha de pneu e aditivo / Characterization of asphalt binders modified with rubber and tire additives
In Brazil, the annual production of waste tires is in the order of 40 million units, with an estimated tire disposal of at least 25 million units per year. According to statistics of the National Association of Tire Industry, 100 million of useless tires are spread around the country in landfills, vacant land, rivers and lakes, causing enormous environment d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/03/2008
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18. Rheological evaluation of polymer-modified asphalt binders
Currently, the most used polymer for asphalt binder modification is the thermoplastic elastomer styrene butadiene styrene (SBS) and aromatic oil is commonly added to the mixtures to improve their compatibly. This paper proposes the use of oil shale from sedimentary rock as a compatibilizer agent for polymer-modified asphalt binder (PMB). PMBs were produced b
Materials Research. Publicado em: 2008-09
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19. Estudo da incorporação de resíduo industrial polimérico ao CAP
This work presents the incorporation of an industrial polymeric waste into a petroleum asphalt cement with penetration grade 50-60 (CAP 50-60). The main goal of this research is the development of a polymer-modified asphalt, with improvements in its physical properties, in order to obtain a more resistant material to the traffic loads. Furthermore, the use o
Publicado em: 2008
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20. Analysis of the effects of crumb rubber and shale-oil residue on mechanical properties of asphalt mixtures / Análise dos efeitos da borracha moída de pneu e do resíduo de óleo de xisto sobre algumas propriedades mecânicas de misturas asfáticas densas
In Brazil, since the beginning of the 90s, have been developed researches on the application of asphalt-rubber seeking the reduction of environmental problems created by the used tires, and the improvement of the characteristics of the produced binder. Taking this into account, the purpose of this research is to evaluate the mechanical performance of eight h
Publicado em: 2008
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21. Comparison between the field performance of CAP 30-45 and CAP 50-70 for pavement layers. / Comparação do comportamento em campo de concretos asfálticos com CAP 30-45 e com CAP 50-70 para revestimentos de pavimentos.
In the last years, the volume of commercial heavy vehycles that transit through Brazilian highways is increasing. In addition, pavement wearing courses are exposed to the influence of high temperatures, that cause precocious asphalt layer distresses Therefore, asphalt mixture alternatives to the high traffic higwayshave been studied. One of the possibilities
Publicado em: 2008
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22. Evaluation of asphalt mixtures produced with conventional peruvian asphalt binder PEN 60/70 and SBS polymer-modified type I 60/60 and PG 76-22 / Avaliação de misturas produzidas com ligantes asfálticos peruanos convencional PEN 60/70 e modificados por polímero SBS tipo I 60/60 e PG 76-22
The main goal of this work is the evaluation of the behavior of conventional peruvian asphalt binder AC PEN 60/70 and SBS polymer-modified asphalts I 60/60 and PG 76-22, when used in hot-mix asphalt (HMA), under both conditions with and without short-term aging. It aims also to establish the asphalt binder performance grade (PG), which is based on the weathe
Publicado em: 2007
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23. Estudo da viabilidade técnica do uso do resíduo de óleo de xisto como óleo extensor em ligantes asfalto-borracha / Study of the technical viability of using shale-oil residue as extender oil in asphalt-rubber binders
Asphalt binder and crumb rubber from discarded tires are materials that, most of time, are not compatible, requiring the addition of chemical products to facilitate the dispersion and incorporation of rubber particles as, for example, the extender oils. This research aims at evaluating the hypothesis that the shale-oil residue, once it is an aromatic oil, ma
Publicado em: 2006
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24. ContribuiÃÃo ao Estudo da ImprimaÃÃo Betuminosa das Bases RodoviÃrias do Estado do Cearà / CONTRIBUTION TO THE STUDY OF BITUMINOUS PRIME COAT ON ROADÂS BASE LAYERS OF CEARà STATE
Bituminous prime coat can be defined as the application of an asphalt film layer on a granular base, for the improvement of its technological qualities. In pavements subjected to the role of the prime coats is even more important due to the reduced thickness of the surface and its low or inexistent structural function. The purpose os this work is to investig
Publicado em: 2006