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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ensaios comparativos de mistura asfáltica pré-misturado a frio com adição de borracha de pneu

Silva, Simone Cristina Caldato da [UNESP] 28 March 2008 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:23:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-28Bitstream added on 2014-06-13T19:50:12Z : No. of bitstreams: 1 silva_scc_me_bauru.pdf: 852083 bytes, checksum: ac164d42c6d5526cc944c7194152c4ef (MD5) / A mistura asfáltica, pode ser usinado a quente e pré-misturado a frio. A mistura denominada pré-misturado, empregada no revestimento de pavimento é a mistura a frio, tendo como composição agregado mineral graduado, material de enchimento e emulsão asfáltica espalhada e comprimida a frio. Esse trabalho irá abordar a mistura asfástica pré-misturado a frio, tendo como objetivo comparar os resultados baseados em ensaios da mistura asfáltica e a caracterização do comportamento da mistura quando preparada com a adição de borracha reciclada de pneus usados. A pesquisa visa qualificar e otimizar o desempenho da mistura asfáltica que receberá a borracha moída com adições de 3%, 4% e 5% em relação à massa total de agregados minerais, comparando-as com a mistura de referência, sem a adição da borracha. A destinação final da borracha constitui em todo o mundo em um grande desafio, em virtude de suas peculiaridades, como seu tempo de degradação, estimado em aproximadamente 600 anos. Além da quantidade gerada nos dias de hoje, volume, peso e principalmente grande dificuldade de alternativas consideradas ecologicamente corretas e economicamente viáveis. Os ensaios realizados baseiam-se em uma faixa de pré-misturado a frio, onde os corpos de prova foram produzidos em laboratório com emulsão asfáltica catiônica. A adição da borracha moída e os teores de emulsão asfáltica foram definidos e analisados após ensaio de Dosagem Marshall a Frio. As características e comportamento das misturas foram avaliados pela densidade da mistura asfáltica, estabilidade e fluência Marshall. Dessa forma, buscando uma alternativa a atender as normas brasileiras e resultados de desempenho dessas misturas asfálticas, conclui-se que... / The asphalt paving mixture can be produced in the heat and premixed in cold. The mixture called premixed, having as mineral aggregate composition graduated, stuffing material and the asphalt emulsion compressed in cold. This work will go to approach the premixed in cold of the asphalt misture, having as objective to compare the results based on assays of the asphalt mixture and the behavior misture characterization when it prepared with the recycled rubber of old tires. The research seeks to qualify and optimize the performance of the asphalt mixture thet will receive the crushed rubber with additions of 3%, 4% and 5% in relation to the total agregate mineral mass, comparing them with the reference mixture, without the rubber addition. The final destination of the rubber to consist of a great challenge all over the world, in virtue of its peculiarities, as its time of degradation, approximately esttmed in 600 years. Beyond the generated amount nowadays, volume, weight and mainly great difficult of considered alternatives correct ecologically and viable economically. The accomplishment rehearsals based on in a strip premixed in cold, called dense strip, where the specimens were produced on the lab wiyh the cationic asphalt emulsion. The crushed rubber addition and the asphalt emulsion texts had been defined and analyzed after rehearsal of in cold Marshall Dosage. The mixture characteristics and behaviour had been evaluated by the stability, Marshall fluency and asphalt mixture density. In the way, looking for an alternative to attend the Brazillians rules and results of performance of these asphalt paving mixture, it follows that the rubber addition benefits are considerable, where the line with 3% addition rubber it presented the smallest index of emptiness, to smallest fluency, the biggest stability Marshall, the biggest apparent density, the biggest relationship polishemptiness and the smallest tenor of emulsion asphalt.

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