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Previous issue date: 2009-12-30 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / With the increase of asphalt milling services was also a significant increase in recycling services pavements. The techniques used today are basically physical processes in which the milled material is incorporated into new asphalt mixtures or executed on site, with the addition of virgin asphalt and rejuvenating agent. In this paper seeks to analyze the efficiency
of extraction of CAP (Petroleum Asphalt Cement) mixtures from asphalt milling, using commercial solvents and microemulsions. The solvents were evaluated for their ability to solubilize asphalt using an extractor reflux-type apparatus. Pseudoternary diagrams were developed for the preparation of microemulsion O/W surfactant using a low-cost coconut oil saponified (OCS). Microemulsions were used to extract the CAP of asphalt through
physicochemical process cold. Analysis was performed concentration of CAP in solution by spectroscopy. The data provided in the analysis of concentration by the absorbance of the solution as the basis for calculating the percentage of extraction and the mass flow of the CAP in the solution. The results showed that microemulsions prepared with low concentration of kerosene and butanol/OCS binary has high extraction power of CAP and its efficiency was higher than pure kerosene, reaching 95% rate of extraction / Com o aumento dos servi?os de fresagem asf?ltica houve tamb?m um incremento significativo nos servi?os de reciclagem de pavimentos asf?lticos. As t?cnicas hoje empregadas s?o basicamente processos f?sicos nas quais o material fresado ? incorporado a novas misturas asf?lticas ou executado in loco , com a incorpora??o de asfalto virgem e agente rejuvenecedor. Nesse trabalho prop?e-se analisar a efici?ncia na extra??o do CAP (Cimento Asf?ltico de Petr?leo) de misturas proveniente de fresagem asf?ltica, utilizando solventes comerciais e microemuls?es. Os solventes foram avaliados quanto a sua capacidade de solubilizar asfalto utilizando um extrator por refluxo do tipo Soxhlet. Foram desenvolvidos diagramas pseudotern?rios para elabora??o de microemuls?o O/A utilizando tensoativo de baixo custo como o ?leo de coco saponificado (OCS). As microemuls?es foram utilizadas para extrair o CAP da mistura betuminosa atrav?s de processo f?sico-qu?mico a frio. Foi
realizada an?lise de concentra??o de CAP na solu??o atrav?s de espectroscopia. Os dados fornecidos na an?lise da concentra??o atrav?s da absorb?ncia da solu??o serviram de base para o c?lculo do percentual de extra??o e do fluxo m?ssico do CAP na solu??o. Os resultados mostraram que microemuls?es elaboradas com baixa concentra??o de querosene e do bin?rio butanol/OCS tem grande poder de extra??o de CAP, sua efici?ncia foi maior do que o querosene puro, alcan?ando taxa de 95% de extra??o
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/15784 |
| Date | 30 December 2009 |
| Creators | Gomes Filho, Fernando Francisco |
| Contributors | CPF:07286937391, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783139Z0&dataRevisao=null, Dantas Neto, Afonso Avelino, CPF:05641284491, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783215D9, Dantas, Michelle Sinara Greg?rio, CPF:91610559487, http://lattes.cnpq.br/3916745350968978, Barros Neto, Eduardo Lins de, Dantas, Tereza Neuma de Castro |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Engenharia Qu?mica, UFRN, BR, Pesquisa e Desenvolvimento de Tecnologias Regionais |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/embargoedAccess |
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