Tesis sobre el tema "Superpage"
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Wienand, Ian Raymond Computer Science & Engineering Faculty of Engineering UNSW. "Transparent large-page support for Itanium linux". Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41021.
Texto completoKim, Hong-Joong. "Evaluation of Superpave and modified Superpave mixtures by means ofAccelerated [sic] Pavement Testing". [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1001156.
Texto completoDu, Guangli. "Implementation of the SuperPave IDT analysis procedure". Thesis, KTH, Väg- och banteknik (stängd 20110301), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-52983.
Texto completoYildirim, Yetkin. "Mixing and compaction temperatures for superpave mixes /". Digital version accessible at:, 2000. http://wwwlib.umi.com/cr/utexas/main.
Texto completoRahman, Farhana. "Performance evaluation of 4.75-mm NMAS Superpave mixture". Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3893.
Texto completoProwell, Brian Douglas Brown E. R. "Verification of the superpave gyratory Ndesign compaction levels". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/doctoral/PROWELL_BRIAN_50.pdf.
Texto completoUppu, Kiran Kumar. "Durable superpave hot-mix asphalt mixes in Kansas". Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13595.
Texto completoDepartment of Civil Engineering
Mustaque Hossain
A recent study at Kansas State University has shown that asphalt producers in Kansas are producing hot-mix asphalt (HMA) mixtures with lower asphalt contents than those in the job-mix formula. These drier mixtures are thought to be susceptible to moisture. This project evaluated the effect of asphalt content on rutting and moisture resistance of HMA. Two different mixtures and four varying asphalt contents, optimum and lower, were selected. Another large-size mixture with four varying asphalt contents was also studied. The Hamburg Wheel Tracking Device (HWTD)test (TEX-242-F) and the Kansas Standard Test-56 (KT-56), or modified Lottman test, were used to predict moisture damage and rutting potential of these mixes. All specimens tested were prepared with the Superpave gyratory compacter. Results of this study showed the drier mixtures performed better in rutting and were less susceptible to moisture.Asphalt content significantly affects the number of wheel passes in the HWTD test. The study also revealed a weak correlation between asphalt film thickness and performance test results. Thus, the effect of varying asphalt content is nonconclusive from a durability point of view. However, performance simulations using a theoretical model show that very dry mixes in asphalt pavements are likely to have shorter performance lives.
Gao, Ya. "Investigation of cracking resistance of recycled Superpave mixtures". Thesis, Kansas State University, 2017. http://hdl.handle.net/2097/38175.
Texto completoDepartment of Civil Engineering
Mustaque A. Hossain
The use of economical and environmentally friendly recycled asphalt materials has become increasingly popular for asphalt pavement construction. Although reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) are typically used in hot-mix asphalt, increasing the amount of RAP and RAS materials increases the potential for premature pavement distresses, especially cracking. This research evaluated four recycled Superpave mixtures with different RAP and RAS contents from Kansas Department of Transportation projects. Two of the mixtures contained 10% RAP and 5% RAS, while the other two mixtures contained 25% RAP but no RAS. Illinois semicircular bending and Florida indirect tension tests were performed to assess mixture cracking and fracture properties. Results showed that mixtures containing 10% RAP and 5% RAS have relatively low fracture energy, creep compliance, energy ratio, and flexibility index but high resilient modulus. These results indicate that mixtures containing 10% RAP and 5% RAS are stiffer, more prone to cracking, and tend to absorb less fracture energy. Mixtures with 25% RAP and no RAS showed the opposite behavior.
Felker, Victoria. "Characterizing the roughness of Kansas PCC and Superpave pavements /". Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.
Texto completoWacker, Brian J. "Evaluation of the rutting resistance of Nevada's superpave mixtures". abstract and full text PDF (free order & download UNR users only), 2006. 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:1436017.
Texto completoHornbeck, Nicholas C. "Effect of compaction effort on Superpave surface course materials". Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5592.
Texto completoTitle from document title page. Document formatted into pages; contains viii, 73 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-54).
Rausch, David Michael Brown E. R. "Laboratory refinement of 4.75 mm Superpave designed asphalt mixtures". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/RAUSCH_DAVID_35.pdf.
Texto completoKnudsen, Christopher M. "Superpave : overview and implementation by the United States Navy". Thesis, Monterey, California. Naval Postgraduate School, 1999. http://hdl.handle.net/10945/9041.
Texto completoSuperpave mix designs have been installed in this country for less than a decade, but have shown promising results thus far. The system provides for design with greater symmetry to the actual loading and aging of asphalt pavements. Although the new mix design utilizes the same materials as the old mix design, the resulting specification requirements are much tighter. While there have been some problems with the installation of the newly designed asphalt mixtures, these problems have been overcome by a good quality control program and close monitoring of the installation process. An asphalt pavement installed under the Superpave system carries with it a requirement for additional training of personnel that the agencies must provide. The United States Navy has a large Current Plant Value of asphalt pavements and could benefit greatly from technology that increases the life span of their facilities
Adamah, Cornelius. "Effect of compaction effort on SuperPave base course materials". Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10822.
Texto completoTitle from document title page. Document formatted into pages; contains viii, 79 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 52-54).
Aziz, Syeda Rubaiyat. "Evaluation of cracking resistance of Superpave mixtures in Kansas". Thesis, Kansas State University, 2013. http://hdl.handle.net/2097/16220.
Texto completoDepartment of Civil Engineering
Mustaque Hossain
Reclaimed Asphalt Pavement (RAP) is a useful alternative to virgin aggregates in hot-mix asphalt (HMA) as it reduces cost, conserves energy, and enables reuse of existing asphalt pavement. However, use of higher percentage of RAP sometimes leads to drier mixes that are often susceptible to early cracking. In this study, cracking resistance of Superpave mixtures with varying asphalt and RAP contents were investigated. HMA specimens were prepared based on Superpave mix design criteria for 12.5-mm (1/2-inch) nominal maximum aggregate size (NMAS). Specimens were compacted using the Superpave gyratory compactor. Static and repeated semi-circular bending (SCB) tests and Texas overlay tests (OT) (TEX-248-F) were performed in order to evaluate cracking resistance of Superpave mixtures containing three different asphalt contents (5.2%, 4.9%, and 4.6%) and three RAP percentages (20%, 30%, and 40%) from two distinct sources. Results from both crack tests showed that, with decreased asphalt content, cracking propensity increases. In general, higher percentage of RAP decreases cracking resistance. Statistical analysis of the results indicated a strong positive correlation between the asphalt film thickness and the number of load cycles before failure. Comparison of mean test results suggested that the Texas overlay test could do better evaluation of cracking resistance than the R-SCB test. This study was limited to mixtures with two sources of RAP. Because of such limitations and conflicting results from these RAP sources, a general conclusion regarding the minimum binder and maximum RAP contents without compromising cracking resistance could not be made. However, separate conclusions were drawn depending upon the characteristics of the RAP source.
Diazgranados, Delaskar David. "Evaluation of 4.75 mm Superpave mix criteria for West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3122.
Texto completoTitle from document title page. Document formatted into pages; contains xiv, 146 p. : ill. (some col.), maps. Includes abstract. Includes bibliographical references (p. 107-109).
Sholar, Gregory A. "Evaluating the use of lower VMA requirements for superpave mixtures". [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008942.
Texto completoAdams, Thomas W. "Evaluation of quality control parameters for Superpave hot mix asphalt". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3838.
Texto completoTitle from document title page. Document formatted into pages; contains vii, 61 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 51).
Villiers, Claude. "Sensitivity of superpave mixtures for development of performance-related specifications". [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0007060.
Texto completoDiefenderfer, Stacey D. "Investigation of Fatigue Properties of Superpave HMA at the Virginia Smart Road". Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/29538.
Texto completoPh. D.
Asiamah, Sylvester Ampadu. "Relationship between laboratory mix properties and rutting resistance for Superpave mixtures". [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE1000103.
Texto completoTitle from title page of source document. Document formatted into pages; contains xii, 110 p.; also contains graphics. Includes vita. Includes bibliographical references.
Tavakol, Masoumeh. "Minimum virgin binder limits in recycled Superpave (SR) mixes in Kansas". Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/32681.
Texto completoCivil Engineering
Mustaque A. Hossain
Use of recycled materials in asphalt pavement has become widespread recently due to rising costs of virgin binder and increased attention to sustainability. Historically, recycled asphalt pavement (RAP) has been the most commonly used recycled material for hot-mix asphalt (HMA). However, recycled asphalt shingle (RAS), another recycled material, has recently become popular. Although there are some guidelines regarding use of RAP and RAS in HMA, their effects on mixture performance, especially on mixtures containing RAS, are not thoroughly understood. In this research, three recycled Superpave mixture designs from the Kansas Department of Transportation (KDOT) with 9.5 mm (SR-9.5A) and 19 mm (SR-19A) Nominal Maximum Aggregate Size (NMAS) were selected as control mixtures. Mixtures containing higher percentages of recycled materials (RAP and RAS) were developed using KDOT blending charts. A total of nine mixtures with varying virgin binder contents were designed and assessed for moisture susceptibility, rutting resistance, and fatigue cracking propensity using modified Lottman, Hamburg Wheel Tracking Device, flow number, Dynamic Modulus, and S-VECD direct tension fatigue tests. Results confirmed the effect of NMAS and material source on mixture performance. For SR-9.5A, the mixtures showed increased susceptibility to moisture and rutting damage below virgin binder content of 75%. For SR-19A, mixtures with virgin binder content of 70% showed satisfactory performance properties. Mixtures with virgin binder contents lower than 60% definitely showed inferior performance.
Ramírez, Ríos Liliana Patricia. "Superpara- and paramagnetic polymer colloids by miniemulsion processes". Phd thesis, Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2005/137/.
Texto completoUnter Miniemulsionen versteht man wässrige Dispersionen relativ stabiler Öltröpfchen, zwischen 30 und 50 nm Größe. Ein Nanometer (nm) ist der 1.000.000.000ste Teil eines Meters. Ein Haar ist ungefähr 60.000 Nanometer breit.
Hergestellt werden Miniemulsionen durch Scherung eines Systems bestehend aus Öl, Wasser, Tensid (Seife) und einer weiteren Komponente, dem Hydrophob, das die Tröpfchen stabilisieren soll. Die Polymerisation von Miniemulsionen ermöglicht die Verkapselung anorganischer Materialen z. B. magnetischer Teilchen oder Gadolinium-haltiger Komponenten. Zu Optimierung des Verkapselung, ist es notwendig, die richtige Menge eines geeigneten Tensids zu finden.
Die magnetischen polymerverkapselten Nanopartikel, die in einer wässrigen Trägerflüssigkeit dispergiert sind, zeigen in Abhängigkeit von Partikelgröße, Zusammensetzung, elektronischer Beschaffenheit, etc. ein sogenanntes superpara- oder paramagnetisches Verhalten. Superpara- oder paramagnetisches Verhalten bedeutet, dass die Flüssigkeiten in Anwesenheit äußerer Magnetfeldern ihre Fließfähigkeit beibehalten. Wenn das Magnetfeld entfernt wird, haben sie keine Erinnerung mehr daran, unter dem Einfluss eines Magnetfeldes gestanden zu haben, d. h., dass sie nach Abschalten des Magnetfeldes selbst nicht mehr magnetisch sind.
Die Vorteile des Miniemulsionsverfahrens sind der hohe Gehalt und die homogene Verteilung magnetischer Teilchen in den einzelnen Nanopartikeln. Außerdem ermöglicht dieses Verfahren nanostrukturierte Kompositpartikel herzustellen, wie z. B polymerverkapselte Nanopartikel mit Nanoschichten bestehend aus magnetischen Molekülen.
Combining the magnetic properties of a given material with the tremendous advantages of colloids can exponentially increase the advantages of both systems. This thesis deals with the field of magnetic nanotechnology. Thus, the design and characterization of new magnetic colloids with fascinating properties compared with the bulk materials is presented.
Ferrofluids are referred to either as water or organic stable dispersions of superparamagnetic nanoparticles which respond to the application of an external magnetic field but lose their magnetization in the absence of a magnetic field.
In the first part of this thesis, a three-step synthesis for the fabrication of a novel water-based ferrofluid is presented. The encapsulation of high amounts of magnetite into polystyrene particles can efficiently be achieved by a new process including two miniemulsion processes. The ferrofluids consist of novel magnetite polystyrene nanoparticles dispersed in water which are obtained by three-step process including coprecipitation of magnetite, its hydrophobization and further surfactant coating to enable the redispersion in water and the posterior encapsulation into polystyrene by miniemulsion polymerization. It is a desire to take advantage of a potential thermodynamic control for the design of nanoparticles, and the concept of "nanoreactors" where the essential ingredients for the formation of the nanoparticles are already in the beginning. The formulation and application of polymer particles and hybrid particles composed of polymeric and magnetic material is of high interest for biomedical applications. Ferrofluids can for instance be used in medicine for cancer therapy and magnetic resonance imaging.
Superparamagnetic or paramagnetic colloids containing iron or gadolinium are also used as magnetic resonance imaging contrast agent, for example as a important tool in the diagnosis of cancer, since they enhance the relaxation of the water of the neighbouring zones. New nanostructured composites by the thermal decomposition of iron pentacarbonyl in the monomer phase and thereafter the formation of paramagnetic nanocomposites by miniemulsion polymerization are discussed in the second part of this thesis. In order to obtain the confined paramagnetic nanocomposites a two-step process was used. In the first step, the thermal decomposition of the iron pentacarbonyl was obtained in the monomer phase using oleic acid as stabilizer. In the second step, this iron-containing monomer dispersion was used for making a miniemulsion polymerization thereof.
The addition of lanthanide complexes to ester-containing monomers such as butyl acrylate and subsequent polymerization leading to the spontaneous formation of highly organized layered nanocomposites is presented in the final part of this thesis. By an one-step miniemulsion process, the formation of a lamellar structure within the polymer nanoparticles is achieved. The magnetization and the NMR relaxation measurements have shown these new layered nanocomposites to be very apt for application as contrast agent in magnetic resonance imaging.
Ramírez, Ríos Liliana Patricia. "Superpara- and paramagnetic polymer colloids by miniemulsion processes". [S.l. : s.n.], 2004. http://pub.ub.uni-potsdam.de/2004/0026/ramirez.pdf.
Texto completoFerro, Claudia Cristina. "Efeito do teor e granulometria de borracha, do tempo e da temperatura de mistura e do tempo de armazenamento sobre propriedades do ligante asfalto-borracha". Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-06012016-114843/.
Texto completoThe production of a modified binder with used tire has become possible because of the increase in the stiffness at high temperature and the flexibility at low temperature that it brings to the surface layers of flexible pavements. The asphalt-rubber binders help to prevent two of the most important problems that affect flexible pavements, that is, the permanent deformation in the wheel tracks and fatigue cracking. In addition, it is possible to reduce the amount of tires disposed in sanitary landfills, increasing the service-life and avoiding environmental and health problems. Using traditional tests and tests of the Superpave method, this study analyses the effects of the main factors that affects the behavior of the asphalt-rubber binder (content and gradation of rubber particles, reaction temperature fixed in 155ºC and time) and the changes in the physical properties of asphalt-rubber binder during the storage time.
Karimi, Sahand Sasha. "Increasing durability of hot mix asphalt pavements designed with the superpave system". College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/9668.
Texto completoThesis research directed by: Dept. of Civil and Environmental Engineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Donkor, Collins Boadu. "Evaluation of rut resistance of SuperPave fine-graded and coarse-graded mixtures". [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0013324.
Texto completoKanneganti, Vasavi. "Comparison of 19mm Superpave and Marshall base II mixes in West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2433.
Texto completoTitle from document title page. Document formatted into pages; contains ix, 70 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 43-45).
Grant, Thomas Paul. "Determination of asphalt mixture healing rate using the Superpave Indirect Tensile Test". [Gainesville, Fla.] : University of Florida, 2001. http://purl.fcla.edu/fcla/etd/UFE0000321.
Texto completoTitle from title page of source document. Document formatted into pages; contains xii, 82 p.; also contains graphics. Includes vita. Includes bibliographical references.
Patino, Gabriel E. "Evaluation of Superpave mixtures in West Virginia using the asphalt pavement analyzer". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3853.
Texto completoTitle from document title page. Document formatted into pages; contains x, 121 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 93-99).
Nelson, Jason W. "Comparison of 9.5 Superpave and Marshall Wearing I mixes in West Virginia". Morgantown, W. Va. : [West Virginia University Libraries], 2005. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3879.
Texto completoTitle from document title page. Document formatted into pages; contains vi, 82 p. : ill. Includes abstract. Includes bibliographical references (p. 62-63).
Gouveia, Lilian Taís de. "Avaliação do ensaio de angularidade do agregado fino (FAA) da especificação Superpave". Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-15032004-154355/.
Texto completoThe performance of hot-mix asphalt (HMA) pavements depends on the properties and proportions of the major components, i.e., mineral aggregates, asphalt cement and air voids. The performance of dense asphalt mixtures is influenced mainly by fine aggregate characteristics, such as shape, angularity and surface texture. The Fine Aggregate Angularity test (FAA), adopted by Superpave to evaluate and quantify the shape, angularity and surface texture of fine aggregate particles, has lead a lot of doubts regarding its suitability. The objective of this work is to verify if the FAA test is really able to classify fine aggregates and identify the good ones to be used in asphalt mixtures. Thus, FAA test, visual analysis of shape, angularity and surface texture, direct shear test with samples of fine aggregates and Marshall test with samples of asphalt mixtures produced with different fine aggregates are performed. The results obtained in the visual analyses indicate that the FAA test is not able to separate the effects of angularity from the effects of shape. The results of the direct shear test demonstrate that a fine aggregate with a higher FAA doesn't present, necessarily, a larger shear strength. The values of the Marshall test doesn't demonstrate correlation between Marshall stability and FAA values. All the results show that the FAA test is not able to classify fine aggregates appropriately and, therefore, is unable to identify aggregates that provide mixtures with better performance
Biensch, Bill Oscar. "The impact that Superpave aggregate specifications will have on the Calgary asphalt industry". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0015/MQ55179.pdf.
Texto completoDantas, Gustavo Henrique Santana. "Estudo do emprego do Compactador Giratório Superpave na compactação de um solo argiloso". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-09042013-142246/.
Texto completoThis research presents the feasibility for using the Superpave Giratory Compactor (SGC) in soils compaction and a comparative evaluation between Proctor\'s and SGC\'s compaction processes. In order to evaluate the SGC compactor, a clayey soil was submitted SGC compaction tests at three normal stress (200, 400 and 600 kPa) and two different weight specimens (1000 and 1800 g). Mechanical tests to determinate the compression and tensile strength and resilient modulus were done on specimens compacted statically and by kneading. Additionally, it is suggested a compaction protocol test on SGC. About SGC\'s result tests indicated that dry densities values (a) at 200 kPa were lower than those obtained at 400 and 600 kPa; (b) at 400 and 600 kPa did not exhibit important variations (c) of 1000g specimens were higher than the 1800g ones and (d) did not increases after 75 number of gyrations. Regarding to mechanical properties, it can be detected that, in general, compression and tensile strength of SGC\'s specimens were better than the specimens compacted statically ones, and, as resilient modulus, specimens compacted statically had better perform than SGC\'s specimens
Ahmed, Ananna. "Evaluation of cracking potential of superpave mixtures with high reclaimed asphalt pavement content". Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20411.
Texto completoCivil Engineering
Mustaque A. Hossain
Approximately 89% of 11,000 miles of Kansas roads are surfaced with asphalt. Hundreds of thousands of tons of reclaimed asphalt pavement (RAP) are produced annually in the United States, including in Kansas. This bulk volume of RAP must be economically managed in order to achieve environmental friendliness. Recycling of RAP conserves natural resources and reduces landfill usage. However, many agencies have reported that increased RAP content produces drier hot-mix asphalt (HMA) mixtures than virgin mixtures that are susceptible to premature cracking. In this research, laboratory-produced Superpave HMA mixtures containing increased percentages (20, 30, and 40%) of RAP materials from three RAP sources (Shilling Construction Co., Konza Co., and the Kansas Department of Transportation’s project, US 73) were studied for cracking performance. Mix designs were produced using Superpave design criteria for 12.5-mm nominal maximum aggregate size mixture. The static and repetitive Semicircular Bending (SCB) test, the Texas Overlay Tester test, the dynamic modulus test, and Viscoelastic Continuum Damage (VECD) tests were performed on laboratory-prepared samples. In general, cracking performance decreased with increased RAP content. The RAP from the US 73 project performed most consistently compared to other two sources of RAPs. Test results were analyzed using two-way Analysis of Variance (ANOVA), proving that mixtures containing 4.5% to 4.9% binder performed the best against cracking. The RAP source was found to have more effect on cracking propensity than RAP content. Mixtures with RAP content up to 40% performed satisfactorily. Tukey’s pairwise comparison method was used to compare results from all tests; VECD was determined to be the most appropriate test to evaluate cracking propensity of HMA mixtures.
Simões, Felipe de Andrade. "Análise do comportamento mecânico em fluência de misturas asfálticas dosadas pela metodologia Superpave". Universidade Federal de Viçosa, 2018. http://www.locus.ufv.br/handle/123456789/19988.
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Esta dissertação apresenta um estudo sobre o comportamento de misturas asfálticas a quente em relação à deformação permanente, à luz dos ensaios de Creep estático e dos parâmetros oriundos da curva de compactação. Para isso, utilizaram-se, para composição dessas misturas, agregados comumente empregados na cidade de Viçosa-MG e dois tipos de ligante asfáltico (CAP 50/70 e BETUFLEX 60/85). Essas misturas foram dosadas pela metodologia Superpave e compactadas no teor e número de giros de projeto. Verificou-se que, para a condição de projeto, as misturas asfálticas que utilizaram o ligante asfáltico CAP 50/70 apresentaram melhor trabalhabilidade e deformações inferiores às misturas compostas pelo ligante polimérico BETUFLEX 60/85. Adicionalmente, esta pesquisa estudou a influência do teor de ligante no comportamento das misturas asfálticas em relação à deformação permanente. Constatou-se que misturas asfálticas com maior teor de ligante tendem a apresentar maiores deformações permanentes e melhor trabalhabilidade. Ademais, buscou-se relacionar os índices da curva de compactação (Construction Densification Index, CDI; Traffic Densification Index modificado, TDIm; e Locking Point, LP) com os parâmetros obtidos nos ensaios de creep estático (Deformação total após o período de recuperação, Dt ; Módulo de Fluência, MF; e Inclinação da Curva, Icurva) através das curvas obtidas por meio da correlação entre esses índices. As correlações verificadas apresentaram bons resultados de R2, mostrando que, para as particularidades desta pesquisa, os índices de compactação podem ser usados como indicadores de previsão quanto ao comportamento mecânico em relação à resistência às deformações permanentes das misturas asfálticas estudadas.
This dissertation presents a study about a behavior of hot asphalt mixtures in relation of permanent deformation, insight of Static Creep Tests and parameters derived from compaction curve. For the composition of these mixtures, aggregates commonly used in Viçosa-MG and two types of asphalt binder. These mixtures were dosed by Superpave method and compacted in the content and number of gyrations. It was found, for the project condition, the mixtures containing the asphalt binder CAP 50/70 showed better workability and lower deformation than the blends composed by BETUFLEX 60/85. In addition, this research studied the influence of binder content on asphaltic mixtures about permanent deformation comportment. It was observed that asphaltic mixtures with high binder content tend to present higher permanent deformation and better workability. Moreover, this research attempted to relate the compaction curve parameters (CDI, Construction Densification Index; TDIm, Modified TDI; and Locking Point, LP) with parameters obtained on Static Creep Tests (Total deformation after recuperation period, Dt; Creep modulus, MF; and Curve slope, Icurva) through the curve generated by correlation between these indices. These correlations presents great R2 results compaction indices can be used as a predictive indicator about the mechanic behavior for resistance to permanent deformations of the studied asphaltic mixtures.
Phillips, Joseph A. "Formulation of free higher spin supersymmetric theories in superpsace". College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1997.
Texto completoThesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Oda, Sandra. "Análise da viabilidade técnica da utilização do ligante asfalto-borracha em obras de pavimentação". Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-30012018-151928/.
Texto completoThis work presents the results of a study about the technical feasibility of the use of asphalt-rubber binder by the asphalt paving industry. In Brazil, more than 30 million tires a year are disposed, mostly in inadequate sites, causing serious health and environmental problems. The effects of the main factors (rubber content, rubber particle size, temperature of mixture, reaction time) on the behavior of asphalt-rubber binders are evaluated by traditional tests and also by tests of the Superpave Method, which are based on fundamental properties, directly related to field performance. The results of the statistical analysis of the factorial design of laboratory experiments show the most significant effect of rubber content and, mainly, that asphalt-rubber binder can increase the resistance to permanent deformation and fatigue cracking.
Rushing, John Ford. "DEVELOPMENT OF CRITERIA FOR USING THE SUPERPAVE GYRATORY COMPACTOR TO DESIGN AIRPORT PAVEMENT MIXTURES". MSSTATE, 2009. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07082009-131453/.
Texto completoTam, Weng On. "Development and use of static creep test to evaluate rut resistance of superpave mixes /". Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Texto completoPadula, Martin. "Automation of the Superpave mix design process for the West Virginia Division of Highways". Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2678.
Texto completoTitle from document title page. Document formatted into pages; contains ix, 145 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 63-65).
Bardini, Vivian Silveira dos Santos. "Estudo de viabilidade técnica da utilização de cinzas da queima da casca de Pinus em obras de pavimentação asfáltica". Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-03022009-095000/.
Texto completoThe industrial production of MDF - Medium Density Fiberboard - uses Pinus wood skin as a fuel, which, after the burning process, generates a fine gradation residue, an ash that is an environmental problem due to the content of some substances, above the quantity allowed by the NRB 10004:2004, and it is classified as a class II-A - non-inert product. The general purpose of this work is to test the hypothesis that the residue can be use as a filler in hot-mix asphalt, through the evaluation of technological properties by laboratory tests such as indirect tension, resilient modulus, fatigue life, moisture susceptibility, Marshall stability and creep. The evaluation of specific gravity of the residue was done by the gas pycnometer method. Initially, the substitution of the mineral filler by the residue was done in terms of weight, but the preliminary results showed that the best option was the substitution in terms of volume. The Marshall mix design for mixtures containing the residue resulted in a binder content approximately constant for both residue contents considered in this work (3.5% and 6.0%). The indirect tension test results showed higher values for mixtures containing 3.5% of mineral filler, being the lowest values associated to mixtures that use residue. The higher the filler content, the higher the resilient modulus and mixtures with mineral filler presented higher resilient modulus values. Only the mixture with 6.0% of mineral filler passed the moisture susceptibility test, and mixtures with residue presented higher moisture susceptibility. The residue also weakened the fatigue life, being the difference higher for mixtures with lower filler content. Although the results show a worsening of asphalt mixtures properties due to the use of the residue as a filler, for most of the obtained results the value remained above the minimum acceptable by technical standards, encouraging further researches on this subject, mainly due to the environmental problem associated to the burning of Pinus wood skin.
Manandhar, Chandra Bahadur. "Rapid estimation of lives of deficient superpave mixes and laboratory-based accelerated mix testing models". Diss., Manhattan, Kan. : Kansas State University, 2010. http://hdl.handle.net/2097/3868.
Texto completoAsam, 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.
Texto completoGebremeskel, Kiflat Yohannes. "The effect of filler type and shape on HMA energy dissipation performance". Thesis, KTH, Väg- och banteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127706.
Texto completoLeiva, Villacorta Fabricio. "Relationships between laboratory measured characteristics of HMA and field compactability". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/LEIVA_FABRICIO_7.pdf.
Texto completoHage, Robert Becerra El. "Estudo de misturas asfálticas tipo Stone Matrix Asphalt (SMA) à luz dos compactadores Marshall e Superpave". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18143/tde-05092012-163002/.
Texto completoThe aim of the work was to investigate, in terms of volumes properties, which would be the number of gyrations required in the Superpave Gyrations Compactor (SGC), to produce samples with characteristics similar to the energy produced with 50 blows in the Marshall Compactor, for Stone Matrix Asphalt (SMA) mixtures with voids content equal to 4%. As a complement, samples designed in the SGC with 100 gyrations, were made to evaluate the impact of increased compaction energy in the binder content, also for voids content equal to 4%, compared to the samples compacted with a number of gyrations equivalent to Marshall, as previously determined. It was used two different aggregates gradations for SMA mixtures: Nominal Maximum Size (NMS) 7,93 mm of the DER and the NMS 12,5 mm of the AASHTO. The mechanical properties of all samples were evaluated with voids content of 4%. The number of gyrations in the SGC to produce mixtures containing voids content equal to 4% for the Marshall`s binder content are similar for both aggregates gradations used. On the other hand, the SMA mixture design with 100 gyrations reduced the binder content for both gradations in comparison with the binder content obtained from Marshall Compaction and SGC with the equivalent number of gyrations. Concerning mechanical properties, the tensile strength and resilient modulus of the samples produced with 100 gyrations in the SGC are, generally, slightly lower than the values obtained with the samples compacted in the Marshall compactor, independent of the aggregate gradations, but higher than the values obtained with the samples compacted with a equivalent energy in the SGC. The fatigue life for the fine gradation (NMS=7,93mm) is significantly higher for the samples compacted in the SGC with 100 gyrations compared with the Marshall compaction, and for the coarse gradation (NMS=12,5 mm) remained in the same order of magnitude that of the Marshall compaction. It was not observed any influence of the compaction method in the induced damage caused by moisture
Vasconcelos, Kamilla Lima. "Comportamento mecânico de misturas asfálticas a quente dosadas pelas metodologias marshall e superpave com diferentes granulometrias". reponame:Repositório Institucional da UFC, 2004. http://www.repositorio.ufc.br/handle/riufc/4902.
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The use of new asphalt mixtures and a new design process are still in consolidation at the universities and departments of transportation in Brazil. The main objective of this research is to design hot mix asphalts with different aggregate gradations using both the Marshall and Superpave (level 1) design method. The differences between these two design methodsare: (i) theoretical maximum specific gravity (Gmm) determination; (ii) compaction method; and (iii) short-term aging of the mixtures. It was selected to this research dense mixtures with 4%air voids, but with continuous and gap-graded gradations. The Gmm was determined indirectly from the mixture composition and the relative densities of the constituents of the mixes, and through the uses of a vacuum pump (Rice method). Short-term aging was considered just in the Superpave design, with 2 hours inthe oven at the compaction temperature. The design results showed higher optimum asphalt content for the Superpave mixtures. The mechanical behavior of the mixtures was evaluated by: the indirect tensile strenght, resilient modulus, fatigue life (stress controlled), resistance to moisture damage, and permanent deformation.
O conhecimento dentro das universidades brasileiras, e principalmente dos órgãos rodoviários, sobre novos tipos de misturas asfálticas e novas formas de dosagens, vem sendo consolidado, mas ainda precisa ser transformado em metodologias correntes. O objetivo geral dessa pesquisa foi a realização da dosagem de misturas asfálticas usinadas a quente com diferentes granulometrias através das metodologias Marshall e Superpave (Nível I).Os procedimentos de dosagem selecionados apresentam como maiores diferenças: (i) forma de determinação da densidade máxima teórica (DMT); (ii) forma de compactação; e (iii) envelhecimento de curto prazo das misturas. As misturas selecionadas foram todas densas, com volume de vazios em torno de 4%, variando-se as distribuições granulométricas, sendo abordadas três granulometrias contínuas (CBUQs) e duas descontínuas (SMAs). A determinação da DMT foi realizada através da ponderação das densidades reais dos materiais constituintes, e através da aplicação de vácuo. O envelhecimento de curto prazo foi considerado apenas na dosagem Superpave, onde foi adotado um tempo de 2h das misturas em estufa na temperatura de compactação. Os resultados dos teores de projeto obtidos apontaram para um maior teor quando adotada a metodologia Superpave. A caracterização mecânica das misturas foi realizada através dosensaios de resistência à tração estática por compressão diametral (RT), módulo de resiliência (MR), vida de fadiga por compressão diametral a tensão controlada e resistência à tração retida por umidade induzida (RRT) e deformação permanente.
Hadouaj, Hichem. "Ondes solitaires sur un film mince elastique superpose a un substrat non lineaire". Paris 6, 1991. http://www.theses.fr/1991PA066149.
Texto completoFernández, Villalba Omar A. y Salinas Edgardo G. Cáceres. "Evaluación del comportamiento mecánico de mezclas SMA y Superpave empleando asfalto modificado con Polímero SBS (Estireno-Butadieno-Estireno)". Bachelor's thesis, Universidad Ricardo Palma. Programa Cybertesis PERÚ, 2007. http://cybertesis.urp.edu.pe/urp/2007/fernandez_oa/html/index-frames.html.
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