Asphalt Modified
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. Estudo da incorporação de resíduos da industria calçadista em misturas asfálticas
ABSTRACT The footwear industry discards residues in its most diverse phases of production, the Ethylene Vinyl Acetate (EVA) being one of them. This work proposes an evaluation of the use of EVA’s residue discarded by the footwear industry of Campina Grande city in asphalt mixtures. The modified asphalt binder was characterized by penetration test, softenin
Matéria (Rio J.). Publicado em: 18/10/2018
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2. Optimal hydrated lime concentration in asphalt binder to improve photo degradation resistance
Abstract The effect of short-term oxidation, evaluated by using a Rolling Thin Film Oven Test, and the effect of weathering aging on the oxidation process of hydrated lime modified asphalts were studied. Hydrated lime (HL) has been known as an additive for asphalt mixtures and is now considered as a binder additive that increases asphalt mixture durability.
REM, Int. Eng. J.. Publicado em: 2018-04
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3. Modification of thermal and rheological behavior of asphalt binder by the addition of an ethylene-methyl acrylate-glycidyl methacrylate terpolymer and polyphosphoric acid
Abstract This study evaluated the modification effects of adding ethylene-methyl acrylate-glycidyl methacrylate terpolymer (EMGMA) in the presence of polyphosphoric acid (PPA) to an asphalt binder graded as 50/70 (0.1mm) in the Brazilian penetration grade specification (AC 50/70). The EMGMA terpolymer has been presented as a new alternative to modify asphalt
Polímeros. Publicado em: 2017-12
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4. Viscoelastic Behaviour Characterization of a Gap-graded Asphalt Mixture with SBS Polymer Modified Bitumen
A characterization of the linear thermo-viscoelastic behaviour of a gap-graded bituminous mixture with SBS-polymer modified bitumen and RAP aggregates is presented in this paper. A comparison was made, in terms of their viscoelastic behaviour, between this innovative mixture and two commonly used well-graded base-course French mixtures made with pure bitumen
Mat. Res.. Publicado em: 2015-04
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5. Estimation of fatigue lives of fly ash modified dense bituminous mixtures based on artificial neural networks
This study deals with estimation of fatigue lives of bituminous mixtures using artificial neural networks. Different types of fly ash were used as filler replacing agents in a dense bituminous mixture. Fatigue tests were performed using repeated load indirect tensile test apparatus under controlled stress conditions. For determination of fatigue life, the in
Mat. Res.. Publicado em: 01/04/2014
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6. Rutting analysis of 100 mm diameter polypropylene modified asphalt specimens using gyratory and Marshall compactors
Compaction technique used in Marshall design does not model the process of actual rolling procedures on site exactly. Carrying out laboratory compaction of dense bituminous mixtures with Superpave gyratory compactors is a more realistic way of simulating actual compaction. In this study, mechanical differences of reference and polypropylene modified asphalt
Mat. Res.. Publicado em: 08/02/2013
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7. Rutting prediction of asphalt mixtures modified by polypropylene fibers via repeated creep testing by utilising genetic programming
A novel application of genetic programming (GP) for modelling and presenting closed form solutions to the rutting prediction for polypropylene (PP) modified asphalt mixtures is investigated. Various PP fibers have been utilised for bitumen modification and repeated creep (RC) tests have been carried out. Marshall specimens, fabricated with multifilament 3 mm
Mat. Res.. Publicado em: 01/02/2013
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8. Effects of Sasobit® content on the rheological characteristics of unaged and aged asphalt binders at high and intermediate temperatures
This paper describes the rheological properties of PG64, PG70, and PG76 asphalt binders blended with different Sasobit® contents. The rheological properties of the Sasobit®-modified binders were characterized after being subjected to different aging conditions using the dynamic shear rheometer (DSR) and rotational viscometer (RV) according to SuperpaveTM t
Materials Research. Publicado em: 31/07/2012
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9. Asphalt binders modified by SBS and SBS/nanoclays: effect on rheological properties
Neste trabalho, investigou-se o efeito da vermiculita e montmorilonita organicamente modificadas (OVMT e OMMT, respectivamente) em ligante asfáltico (AB) modificado por SBS (butadieno-estireno-butadieno). As propriedades físicas e reológicas foram avaliadas para AB, 4,0% SBS MB e nanocompósitos AB modificados por 2,5% SBS com 2,5% de organoargilas. Os li
Journal of the Brazilian Chemical Society. Publicado em: 2012-04
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10. Caracterização do comportamento fluência-recuperação de ligantes asfálticos modificados virgens e envelhecidos / Characterization of the creep-recovery behavior of unaged and short-term aged modified asphalt binders
O ensaio de fluência e recuperação sob tensão múltipla (MSCR) é resultado do aperfeiçoamento do ensaio de fluência repetida e recuperação (RCRT) pela Administração Rodoviária Federal dos Estados Unidos (FHWA) e tem por objetivo avaliar o percentual de recuperação, a compliância não-recuperável e a dependência dos ligantes asfálticos, espe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2011
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11. AvaliaÃÃo do desempenho de ligante asfÃltico modificado por poli (Ãcido fosfÃrico) (PPA) e efeitos da adiÃÃo do lÃquido da casca da castanha de caju (LCC). / Performance evaluation of asphalt binder modified poly (phosphoric acid) (PPA) and effects adding the liquid from the bark of cashew (LCC)
The AC with 50/70 penetration grade (Petrobras - LUBNOR), pure and modified by polyphosphoric acid (PPA), was analyzed by rheological tests (viscosity and DSR), thermal analysis (TGA and DSC), spectrometric (NMR and FTIR) and chromatographic (TLC-FID and GPC) methods. The interaction of AC with PPA was investigated from the reactions of its fractions (aromat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/12/2011
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12. Avaliação de concreto asfáltico com incorporação de pó de borracha reciclada de pneus, tratada superficialmente com hidróxido de sódio comercial / Evaluation of asphalt concrete with addition of ground rubber from second-hand tires, using superficial treatment with a sodium hydroxide commercial
O principal objetivo deste trabalho é a determinação das principais propriedades do asfalto borracha e das propriedades mecânicas de um concreto asfáltico, tendo, como adição, o uso de borracha moída de pneus usados, tratada com solução de hidróxido de sódio comercial. Obtivemos, com o tratamento superficial da borracha de pneus usados, melhor in
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2011