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Dissertations / Theses on the topic 'Modified asphalt'

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Published: 4 June 2021

Last updated: 26 July 2025

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1

Abdul, Hassan Norhidayah. "Microstructural characterisation of rubber modified asphalt mixtures." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/27625/.

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Research to improve the performance of asphalt mixtures through the addition of crumb rubber using the dry process has continued worldwide because of its potential as a recycling option for used tires. For decades, dry mixed rubberised asphalt mixtures have performed inconsistently in field trials and laboratory evaluations. However, current research has revealed that the performance of asphalt mixtures is highly dependent on the characteristics of its internal structure or phase constituents. A comprehensive methodology has been developed in this study to characterise the microstructural prop

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2

Butt, Ali Azhar. "Low Temperature Performance of Wax Modified Mastic Asphalt." Thesis, KTH, Väg- och banteknik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-49694.

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The current interest in energy saving asphalt production techniques is great and several new processes have been developed to reduce the mixing and compaction temperatures for hot mix asphalt. In particular, mastic asphalt products (Gussasphalt) require high working temperatures, and harder requirements concerning bitumen fumes and carbon dioxide emissions have been introduced for such products. Consequently, the need of a new means of producing and placing mastic asphalt at lower temperatures is particularly large. One way of reducing asphalt mixture temperature is by using special flow impro

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3

Veizer, Robert Carleton University Dissertation Engineering Civil and Environmental. "Design of a crumb rubber modified asphalt pavement using the stone mastic asphalt concept." Ottawa, 1993.

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4

Meneguini, Eduardo Cesar Antonelli. "Avaliação de concreto asfáltico com incorporação de pó de borracha reciclada de pneus, tratada superficialmente com hidróxido de sódio comercial." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258506.

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Orientador: Vladimir Antonio Paulon<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-19T19:32:15Z (GMT). No. of bitstreams: 1 Meneguini_EduardoCesarAntonelli_D.pdf: 4162044 bytes, checksum: 987787614d2ef9437a3937a43815bde9 (MD5) Previous issue date: 2011<br>Resumo: 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 s

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5

Sebaaly, Haissam K. "Evaluation of Nevada's hot mix asphalt mixtures using tire rubber modified binders." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1442842.

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6

Widyatmoko, Iswandaru. "The performance of polymer modified bituminous mixtures." Thesis, Sheffield Hallam University, 1998. http://shura.shu.ac.uk/20533/.

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The use of polymers in bituminous materials has been gaining popularity over the last decade. Despite their superiority in enhancing the performance of bituminous mixtures, problems have been experienced due to limitations on the applicability of currently available assessment techniques. This thesis is concerned with the mechanical behaviour of polymer modified bitumens and the performance of polymer modified bituminous mixtures. The first part of the thesis presents different pavement distresses and the importance of using polymer modified binders to improve the performance of bituminous mix

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7

Penny, Julie Elizabeth. "An evaluation of heated reclaimed asphalt pavement (RAP) material and wax modified asphalt for use in recycled hot mix asphalt (HMA)." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-010807-113145/.

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8

Rahman, Mujibur. "Characterisation of dry process crumb rubber modified asphalt mixtures." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.408614.

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9

Lamperti, Riccardo. "Rheological and energetic characterization of wax-modified asphalt binders." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4260/.

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10

Ofori-Abebresse, Edward Kwame. "Fatigue resistance of hot-mix asphalt concrete (HMAC) mixtures using the calibrated mechanistic with surface energy (CMSE) measurements approach." Thesis, Texas A&M University, 2006. http://hdl.handle.net/1969.1/4136.

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Fatigue cracking is one of the fundamental distresses that occur in the life of a Hot Mix Asphalt Concrete (HMAC) pavement. This load induced distress leads to structural collapse of the entire pavement ultimately and can only be remedied by rehabilitation. There is the need, therefore, for a total understanding of the phenomenon to be able to counter its occurrence. The fatigue resistance of hot mix asphalt concrete (HMAC) has been estimated using approaches ranging from empirical methods to mechanistic-empirical methods to purely mechanistic methods. A continuum mechanics based approach call

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11

Fernandes, Mônica Romero Santos. "Efeitos de aditivo tipo óleo e enxofre na reologia de asfaltos modificados com SBS." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/25410.

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O uso de asfaltos modificados com polímeros tem crescido significativamente nas últimas décadas em função do aumento da densidade de tráfego, da carga por eixo nos veículos e da pressão dos pneus. Estes ligantes proporcionam o aumento a vida útil e a redução do custo de manutenção das rodovias. Os polímeros mais utilizados na modificação de asfalto são os copolímeros em bloco de estireno-butadienoestireno. Esta tese avaliou os efeitos de diferentes agentes compatibilizantes (óleos) e agentes de ligação no comportamento reológico de misturas asfálticas modificadas com copolímeros de estireno-bu

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12

Woo, Won Jun. "Development of a long-term durability specification for polymer modified asphalt." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1904.

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13

Nguyen, Tom P. "MITIGATING MOISTURE SUSCEPTIBILITY IN HOT-MIX ASPHALT CONCRETE." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/467.

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Moisture damage in asphalt pavement has always been a problem for drivers, bicyclists, and pedestrians. The primary objective of this study is to evaluate moisture susceptibility of Hot-Mix Asphalt (HMA) and to investigate mitigation techniques using different antistripping agents. Three types of antistripping agents were used in this research investigation. Two of which are chemical based and the other is hydrated lime. The two types of liquid antistripping agents used in this study include Arr Maz CC LOF-6500 and Arr Maz CC XL-9000. These two liquid antistripping agents were tested at 0.25%,

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14

Lucena, Maria da ConceiÃÃo Cavalcante. "Chemical and rheological characterization of an asphalt cement(AC)modified polymers." Universidade Federal do CearÃ, 2005. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=1417.

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Neste trabalho foi realizado o estudo da caracterizaÃÃo quimica e reologica do cimento asfaltico produzido recentemente no pais, oriundo de petroleo do Campo Fazenda Alegre, no estado do Espirito Santo. Para efeito de comparaÃÃo, tambem foram estudados os asfaltos da refinaria Vale do Paraiba e os estrangeiros arabe e venezuelano. Os asfaltos foram modificados por incorporaÃÃo dos polimeros SBS e EVA, e os efeitos resultantes da modificaÃÃo foram avaliados. Os parÃmetros investigados visaram a avaliaÃÃo de problemas usuais como: deformaÃÃo permanente, trincas termicas e oxidaÃÃo. Os polimeros

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15

Napiah, Madzlan B. "Fatigue and long term deformation behaviour of polymer modified hot rolled asphalt." Thesis, University of Leeds, 1993. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.712012.

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16

Bryant, James William Jr. "Prediction of Linear Viscoelastic Response of the Loss Shear Modulus of Polymer-Modified Binders." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/31719.

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Current mathematical models, developed on straight asphalt binders, are inadequate to characterize the frequency dependence of response of polymer-modified asphalt binders. In an earlier study at Virginia Tech, mathematical models were developed to predict the storage and loss shear moduli of polymer-modified binders. However the model developed for the loss shear moduli is limited at high frequency (G" less than or equal to 10^7.5 Pa). This thesis presents a statistical modeling of loss shear modulus of polymer (random copolymers and thermoplastic block copolymers) modified binder. Data f

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17

Asam, Kalyan Reddy. "Laboratory evaluation of the effect of superpave gradations and polymer modified asphalts on pavement performance." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1173466416.

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18

Ragab, Mohyeldin. "Enhancing the Performance of Crumb Rubber Modified Asphalt through Controlling the Internal Network Structure Developed." Diss., North Dakota State University, 2016. http://hdl.handle.net/10365/25735.

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Sustainability presents a pathway for future generations to have a better life. Cradle to cradle methodology is the essence of sustainability. In cradle to cradle approach, we aim to reuti-lize a given waste instead of disposing or landfilling it. Each year, millions of waste tires are dis-posed of in landfills. This poses a major challenge environmentally and economically. Environ-mentally, those tires become prone to fire hazards as well as being a place for rodents and mos-quitos to reside at. Economically, on the other hand, each tire has an average of about 50% valu-able polymers as well

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19

Shi, Ying. "High Temperature Shape Memory Polymers & Ionomer Modified Asphalts." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1374793580.

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20

Kraus, Zachary Rothman. "The morphology of polymer modified asphalt and its relationship to rheology and durability." Texas A&M University, 2008. http://hdl.handle.net/1969.1/86003.

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Polymers are added to asphalt binders primarily to stiffen the binder at higher temperatures and thus to protect the pavement against rutting at summertime temperatures early in the pavement's life. Also, it has been noted that polymers typically increase the ductility of a binder and that some polymer-asphalt combinations are especially effective. Furthermore, it is hypothesized that enhancing a binder's ductility, and maintaining this enhancement with binder oxidative aging, contributes to enhanced binder durability in pavements. However, polymer-asphalt interactions and how they might contr

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21

Othman, Ayman Mahmoud. "Mechanical performance and fatigue crack growth behavior of polymer-modified asphalt concrete mixtures." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1058531669.

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22

Cichocki, Paul F. "Application of Highly Modified Asphalt (HiMA) Binders in Implementation and Thickness Optimization of Perpetual Pavements in Ohio." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1438354931.

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23

Negrão, Douglas Polcaro. "Estudo de asfaltos modificados por polímeros do tipo RET para aplicações em pavimentos." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-09032007-170249/.

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O presente trabalho avalia as alterações de propriedades dos asfaltos pela modificação por polímero do tipo RET (Reactive Elastomeric Terpolymer) e de comportamento de misturas asfálticas densas usinadas com estes asfaltos modificados. Para atingir este objetivo, são apresentados os resultados do monitoramento realizado no trecho experimental executado na SP-330, Rodovia Anhanguera, que empregou este tipo de asfalto modificado e estudo que compreende a modificação de ligantes do tipo CAP20 e CAP40 com 1,0%, 1,5% e 2%, de polímero RET, com posterior dosagem de uma mistura na Faixa III do DERSA

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24

Zegarra, Jorge Rodolfo Escalante. "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." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-26042007-173415/.

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Os objetivos deste trabalho são avaliar o comportamento de asfaltos peruanos convencional CAP PEN 60/70 e modificados por polímero SBS tipo I 60/60 e PG 76-22, em misturas asfálticas densas, sem e com envelhecimento em curto prazo, e estabelecer a distribuição do grau de desempenho (PG) de ligantes asfálticos com base nas condições climáticas de cada região do Peru. Para a classificação por desempenho os ligantes asfálticos procedentes de Peru foram submetidos aos ensaios convencionais e da especificação Superpave: penetração, ponto de amolecimento, viscosidade Brookfield, ponto de fulgor, ret

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25

De, Cezaro Junior Tadeu. "Estudo das propriedades mecânicas de misturas asfálticas convencionais e modificadas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/18323.

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Nesta dissertação de mestrado analisa-se e compara-se, através de ensaios laboratoriais, o comportamento mecânico e de adesividade de misturas em concreto asfáltico, confeccionadas a partir de ligantes asfálticos modificados e convencionais. O conhecimento e entendimento destas características são de extrema importância, pois refletem diretamente no desempenho do pavimento em serviço. Foram estudadas misturas elaboradas com um ligante convencional e três ligantes modificados por polímeros. Todas as misturas foram dosadas segundo a metodologia Marshall, e submetidas a ensaios laboratoriais de m

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26

Elseifi, Mostafa. "Viscoelastic Modeling of Straight and Modified Binders at Intermediate and High Temperatures." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/36445.

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The increase and change in traffic loading in recent years has resulted in the introduction of a new range of high performance asphalt binders. These new binders known as modified asphalt binders, have a more complex behavior than traditional binders. A review of the current mathematical models shows that most of them suffer from different drawbacks that make them inadequate for their intended application. To describe the behavior of straight and modified binders in the thermorheologically simple linear viscoelastic region, two models are proposed. Models to characterize the absolute value

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27

Saqer, Hamzeh. "Comprehensive Evaluation of Permanent Deformation Behavior for Asphalt Mixtures under High Stresses." Ohio University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1557235662629231.

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28

Ng, Andressa Ka Yan. "Evaluation of the fatigue damage behavior of fine aggregate matrices prepared with modified asphalt binders." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03012018-122026/.

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The fatigue cracking process occurs by the repeated dynamic loading from the traffic of heavy vehicle. This phenomenon initiates as microcracks and develops under two circumstances: (i) after adhesive failure, when the crack occurs at the interface aggregate-mortar, and/or (ii) after cohesive failure, when the crack develops within the mortar. Based on such interpretation of the cracking phenomenon in asphalt concrete mixtures, researchers have been using the fine aggregate matrices (FAMs) to estimate the fatigue behavior of the asphalt concrete. Good agreement is observed between the properti

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29

Foretti, Alexandre Cagnani. "Estudo de misturas preparadas com asfalto convencional e asfalto modificado com polímeros." Universidade de São Paulo, 1999. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-06032018-114401/.

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Este trabalho teve como objetivo avaliar o comportamento de duas misturas asfálticas preparadas com asfaltos diferentes, uma com asfalto convencional (CAP 20) e outra com asfalto modificado pela adição de polímeros (BETUFLEX B 80/60), à luz dos resultados de dois ensaios distintos, o ensaio Marshall e o ensaio de fluência por compressão uniaxial estática. O ensaio de fluência uniaxial estática consiste, numa forma indireta, para avaliar a resistência da mistura asfáltica à formação de trilha de roda ou à deformação permanente. Os resultados dos ensaios Marshall não permitiram concluir se houve

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30

Gahvari, Fariborz. "Modeling of the linear viscoelastic response of polymer modified asphalt binders at intermediate and high temperatures." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08272007-163901/.

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31

Ploger, Desiree. "Effects of ultraviolet (UV) radiation on thermal, chemical, and rheological properties of rubber-modified asphalt binders." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

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This research aims to investigate the thermal, chemical and rheological properties of UV-aged asphalt binders containing recycled tire rubber (RTR) powder. The UV Aging process changes the chemical composition and physical properties of asphalt and causes distress on pavement. It is known that the presence of crumb rubber (CR) reduces the susceptibility of asphalt to aging, but its mechanism is not fully understood. Moreover the rheological performance of a crumb rubber modified binder are still partially unknown. In this research, the effect of ultraviolet (UV) rays on samples of asphalt bi

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32

Eskandarsefat, Shahin <1983&gt. "Innovative Modified Stone Mastic Asphalt Concretes Containing Composite Poly-functional Fibres for Eco-friendly Paving Applications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amsdottorato.unibo.it/8811/1/Shahin%20Eskandarsefat%20Thesis%20-%20Final.pdf.

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In the present research, a complete study was carried out investigating the effectiveness of novel cellulose-based poly-functional fibres in enhancing the mechanical and performance properties of a virgin and 25% RAP containing Stone Mastic Asphalt (SMA). Therefore, there could be a significant economic advantage and a well-balanced solution between eco sustainability and technology in using RAP in SMA, if it could be used without sacrificing the excellent performance of SMA mixtures. The fibres modification was carried out by adding mineral (glass) fibre, a type of Plastomeric polymer and/or

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33

Elsafty, Mohamed Mahmoud Mohamed Hafez. "Study on long-term deformation and draindown properties of rubberized porous asphalt." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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The current research focused on the feasibility of CR incorporation in porous asphalt and the effectiveness on the permanent deformation behavior by the following high lights. In the first stage, a broad investigation (Literature review study) have been done in order to clarify the potential effectiveness of CR incorporation in any hot mix asphalt mixture by dry process, more focus on the porous asphalt experience. In the following the draindown test conducted in order to assess the feasibility CR replaced by common draindown fibers. Finally, experimental work continued by Creep characterizati

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34

Reubush, Stacey Diane. "Effects of Storage on the Linear Viscoelastic Response of Polymer-Modified Asphalt at Intermediate to High Temperatures." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/30838.

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The design and construction of roads with longer service lives is a priority of civil engineers. The selection of appropriate highway materials with respect to climatic and loading conditions may significantly increase the lifespan of pavements. One material receiving interest in the area of improved roadway performance is polymer-modified binder. The complex behavior of polymer-modified binders, particularly over time, is not yet well-understood by engineers. Therefore, an experimental study was performed to determine the effects of four years of storage at room temperatures (23Â°C) on the dy

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35

Zavřel, Tomáš. "Posouzení nízkohlučného asfaltového koberce mastixového s CRmB." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225494.

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The aim of diploma thesis is to design mixture SMA LA 8 with crumb rubber modified bitumen (9,9 %) and a modifier additive TecRoad (22 %) and the test of water sensitivity, the resistance to permanent deformation and to frost cracking, the determination of the stiffness and fatigue characteristics. Test methods are described and evaluated.

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Reis, Rafael Marcal Martins de. "Revestimento asfáltico tipo SMA para alto desempenho em vias de tráfego pesado." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-14112003-103348/.

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Este trabalho apresenta alguns resultados de pesquisa laboratorial compreendendo projeto de dosagem, comportamento mecânico da mistura SMA (Stone Matrix Asphalt - Matriz Pétrea Asfáltica), bem como, aspectos executivos relacionados ao desenvolvimento de um trecho experimental em SMA para revestimento de pavimentos. Os resultados de laboratório obtidos mostram que o SMA é um revestimento asfáltico que pode apresentar bom desempenho sob cargas pesadas em climas quentes, pois estas misturas são muito resistentes à deformação permanente, mas preservam a flexibilidade como os concretos asfálticos d

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Bruxel, Daiana Frank. "ESTUDO DO COMPORTAMENTO VISCOELÁSTICO DE CONCRETOS ASFÁLTICOS CONVENCIONAIS E MODIFICADOS ATRAVÉS DE ENSAIOS DE LABORATÓRIO E DE ANÁLISE DE DESEMPENHO." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/7901.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Road transport is of great importance for many countries, in Brazil it can be even more extreme, by excessive movement of cargo through this modal. We know that the maintenance costs of roads are high, forcing researchers to find always new alternatives to improve the use of materials, reduce energy consumption, speed up restoration interventions, among others. The goal of this study is to evaluate the behavior of conventional asphalt mixtures of polymers and modified for resistance and deformability. For this study, we used a crus

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Rodrigues, FabÃola Odete. "Effect of the cashew nut shell liquid (CNSL) on the rheological properties of the asphalt binder modified with SBS." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5691.

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The objective of this study was to modify the asphalt binder (LA) with 50/70 penetration by incorporating SBS (3, 4 and 4.5%) and the cashew nut shell liquid (CNSL) (1% w/w). The studies were directed towards assessing and analyzing the rheological master curves obtained from tests on a dynamic-shear rheometer (DSR). In addition, we assessed the effects of additives in relation to the viscosity, storage stability, and oxidative aging simulated at the RTFOT. The results indicated that the addition of SBS increases the stiffness and the elastic response of the binder at high temperatures. The

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Burger, A. F. "Rheology of polymer modified binders : a comparative study of three binders and three binder/filler systems." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52438.

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Thesis (MEng)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: The use of polymer modified binders have increased drastically over the past twenty years. It is generally accepted that current empirical specification tests do not adequately characterise the improvement in binder properties when bitumen is modified with polymers. At the University of Stellenbosch, a programme was initiated to relate binder properties to asphalt mix performance. This study forms part of that programme. This study focuses on three binders and is an attempt to characterise binder properties fundament

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Santos, Caio Rubens Gonçalves. "Avaliação das influências do tipo de ligante e do volume de vazios na vida de fadiga de algumas misturas asfálticas." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-04102005-084310/.

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Este trabalho tem como objetivo avaliar o comportamento à fadiga de algumas misturas asfálticas, à luz de resultados de ensaios de fadiga por compressão diametral à tensão controlada, realizados em corpos-de-prova, considerando-se a variação de dois fatores: tipo de asfalto e volume de vazios. Para mesmo agregado (basáltico) e mesma faixa granulométrica (centro da faixa C do DNER) foram moldados, segundo os procedimentos do método Marshall, corpos-de-prova com três tipos de ligantes, sendo um asfalto convencional (CAP 20), um asfalto modificado com polímero (CAP 20 + SBS) e um asfalto modifica

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Arsano, Iskinder Yacob. "BIO-OIL MODIFIED ASPHALT AS A NOVEL AND IMPROVED CONSTRUCTION MATERIAL & CARBON NANOTUBES FOR TARGETED ADSORPTION OF BENZOIC ACID." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1596635907208643.

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42

Maciel, Emerson Rodrigues. "O emprego de borracha termoplástica tipo estireno-butadieno-estireno em cimentos asfálticos de petróleo." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266942.

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Orientador: Wagner dos Santos Oliveira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-17T00:29:49Z (GMT). No. of bitstreams: 1 Maciel_EmersonRodrigues_M.pdf: 10298208 bytes, checksum: d19a140f86e923ce68500657b2e841fa (MD5) Previous issue date: 2010<br>Resumo: 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

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Acuna, Subia Luis Carlos. "Vlastnosti asfaltových směsí typu SMA s R-materiálem." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-371816.

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The aim of the diploma thesis is to verify and compare the properties of bituminous stone mastic asphalt, namely SMA 11S with modified PMB 45 / 80-55 asphalt binder or 50/70 road bitumen binder with rubber granulate. Comparison of properties is performed using functional tests. The thesis is divided into the theoretical and practical part. The theoretical part deals with the familiarization with the use of the SMA mixture, the selected concepts concerning recycling of non-leveled roads are described and described. Attention is paid especially to the recycling of roads in the Czech Republic wit

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Salado, Martinez Freddie Antonio. "Assessment of Fracture Resistance of Asphalt Overlays through Heavy Vehicle Simulator and Laboratory Testing: Synthetic Fiber and Rubber Modified SMA Mixes." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/98576.

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Road administrators have to make decisions regarding the maintenance and rehabilitation of many existing jointed Portland Cement Concrete (PCC) pavements in the road network. Since these pavements are in general expensive to rehabilitate, agencies often opt for overlaying the deteriorated PCC pavement with Hot Mix Asphalt (HMA), resulting in a composite pavement. Unfortunately, the tensile stresses and strains at the bottom of the overlay developed from the movement of the joints, which are caused by the traffic and the changes in temperature, will create cracks on the surface known as reflect

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Milne, Terence Ian. "Towards a performance related seal design method for Bitumen and modified road seal binders." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/856.

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Thesis(PhD (Civil Engineering))-- University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Bitumen based road surfacing seals and asphalt wearing courses have been used by society's Engineers "to counter the damage to the existing unsurfaced roadways by the newly developed automobile with its rubber driving wheels" since the early 1900's. Early experiments were conducted with both tar and bitumen to find a suitable material to alleviate the situation, and ongoing research has been carried out through the past century and into the new millennium, throughout the world, examining improvements, fro

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Onofre, Felipe Coutinho. "AvaliaÃÃo do comportamento mecÃnico de misturas asfÃlticas produzidas com ligantes asfÃlticos modificados por Ãcido polifosfÃrico e aditivos polimÃricos, enfatizando a resistÃncia Ã deformaÃÃo permanente." Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12400.

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A modificaÃÃo de ligantes asfÃlticos Ã uma prÃtica cada vez mais comum em vias de elevado volume de trÃfego e tem como objetivo a melhoria das caracterÃsticas reolÃgicas desses materiais, principalmente em temperaturas extremas. O objetivo principal deste trabalho Ã avaliar o comportamento mecÃnico de misturas asfÃlticas produzidas com ligantes asfÃlticos modificados por Ãcido polifosfÃrico e polÃmeros no que diz respeito Ã rigidez e Ã resistÃncia Ã deformaÃÃo permanente. Foram estudadas 17 misturas asfÃlticas com a mesma granulometria porÃm com diferentes tipos de agregados e de ligantes asfÃ

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Slavíček, Michal. "Využití R - materiálu v asfaltových kobercích mastixových." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265415.

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This diploma thesis deals with the designs of asphalt mixtures for the wearing asphalt courses, specifically for the SMA 11S with an added 30 % and 50 % RAP (reclaimed asphalt pavement), this material was reclaimed from the wearing asphalt course type SMA. The thesis is divided into two parts. The first part is theoretical and it deals with the recycling of asphalt roads and adding RAP to the new asphalt mixures for the roads. The second part is practical. It deals with the design itself. Two types of SMA were designed, first with a 30 % RAP and second with a 50 % RAP. In those mixtures functi

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Edwards, Ylva. "Influence of waxes on bitumen and asphalt concrete mixture performance." Doctoral thesis, KTH, Väg- och banteknik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-553.

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This doctoral thesis consists of a literature review, presented in two papers, and another six papers describing experimental studies of the influence of different kinds of wax and polyphosporic acid on bitumen and asphalt concrete mixture properties. The literature review should give an extensive description of the field of knowledge concerning wax in bitumen. Effects of wax in crude oil, bitumen and asphalt concrete as well as test methods for studying these effects are described. Theories behind possible mechanisms are also discussed, and commercial wax as additive to bitumen for different

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Amaral, Simonne da Costa. "Estudos de misturas asfálticas densas com agregados do estado do Pará, utilizando asfalto convencional (CAP-40) e asfalto modificado com polímero SBS (BETUFLEX B 65/60)." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-07012003-194218/.

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Este trabalho teve como objetivo avaliar as vantagens ou desvantagens de utilizar-se asfalto modificado com polímero em misturas densas com seixo rolado como agregado graúdo. Para o experimento foram moldados setenta e cinco corpos-de-prova com asfalto convencional (CAP-40) e setenta e cinco corpos-de-prova com asfalto modificado (BETUFLEX B 65/60) e avaliados à luz dos ensaios Marshall, fluência por compressão uniaxial estática à 40ºC, resistência à tração por compressão diametral e módulo de resiliência por compressão diametral à 25ºC. Os resultados dos ensaios Marshall e de resistência à tr

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Sobreiro, Fernanda Pilati. "Efeito da adição de ácidos fosfóricos no comportamento reológico de ligantes asfálticos puros e modificados com copolímero SBS." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-28052014-100359/.

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A adição de modificadores no ligante asfáltico visando melhorar o seu comportamento é uma prática comum atualmente. Existem vários tipos de modificadores, entre eles o mais utilizado nas rodovias federais brasileiras é o copolímero SBS. Além dos polímeros, o ácido polifosfórico (PPA) é outro tipo de modificador que produz boas características quando adicionado ao ligante asfáltico. Apesar do efeito positivo, sabe-se que este material é importado, o que dificulta sua aquisição e pode tornar o produto final muito caro. Tendo em vista a possibilidade de se trabalhar com um produto de mesma

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