Obtenção de emulsões asfálticas modificadas utilizando resíduos industriais

The main objective of this research was the development and characterization of conventional and modified cationic asphalt emulsions. The asphalt emulsions were developed by using the Petroleum Asphalt Cement (CAP 50-70) from Fazenda Belém (Petrobras -Aracati-Ce). The first step in this research was the development of the oil phase (asphalt + solvent) and the aqueous phase (water + emulsifying agent + acid + additives), separately. During the experiments for the obtaining of the conventional asphalt emulsion, the concentration of each constituent was evaluated. For the obtaining of the oil phase, kerosene was used as solvent at 15 and 20 wt.%. For the development of the aqueous phase, the emulsifying agent was used at 0.3 and 3.0 wt.%, whereas the acid and the additive were set at 0.3 wt.%. The percentage of asphalt in the asphalt emulsion was varied in 50, 55, and 60 wt.% and the heating temperature was set at 120 °C. The aqueous phase in the asphalt emulsion was varied from 16.4 to 34.1 wt.% and the heating temperature was set at 60 °C. After the obtaining of the oil and the aqueous phases, they were added at a colloidal mill, remaining under constant stirring and heating during 15 minutes. Each asphalt emulsion was evaluated considering: sieve analysis, Saybolt Furol viscosity, pH determination, settlement and storage stability, residue by evaporation, and penetration of residue. After the characterization of conventional emulsions, it was chosen the one that presented all properties in accordance with Brazilian specifications (DNER-EM 369/97). This emulsion was used for the development of all modified asphalt emulsions. Three polymeric industrial residues were used as modifier agents: one from a clothing button industry (cutouts of clothing buttons) and two from a footwear industry (cutouts of sandals and tennis shoes soles), all industries located at Rio Grande do Norte State (Brazil).The polymeric residues were added into the asphalt emulsion (1 to 6 wt.%) and the same characterization rehearsals were accomplished. After characterization, it were developed the cold-mix asphalts. It was used the Marshall mix design. For cold-mix asphalt using the conventional emulsion, it was used 5, 6 and 7 wt.% asphalt emulsion. The conventional mixtures presented stability values according Brazilian specification (DNER-369/97). For mixtures containing asphalt modified emulsions, it was observed that the best results were obtained with emulsions modified by button residue

Desejo, estilo de vida e transgressão da identidade em Dancer from the dance de Andrew Holleran e Pela noite de Caio F.

From the research and awareness of literary work, this thesis discusses aspects related to the study of homoeroticism and lifestyles in the works Dancer from the Dance (2001) by Andrew Holleran and Pela noite (2010) by Brazilian author Caio Fernando Abreu. Whereas issues about beauty, desire and lifestyle shape cutouts important to the narrative, I propose a discussion by examining the works that mark from the first moments of sexual release party in New York with the peculiarities of their own styles that characterized the Andrew Holleran characters rostificadas by an ethos that he composed during this time opening for freedom of sexual deviant sexualities. In Pela noite, we reiterate a continuation of opening moment in Brazil for gay characters Caio , assuming the early 1980s for those characters is the first " shadows " of AIDS and knowledge of self , in which his characters living with fear, anonymity and reminiscences of homophobia as a backdrop to the discussions that are triggered off by the author . To compose a theoretical framework to subsidize this work , we selected the works of Michel Foucault (2007 , 2010a , 2010b ) , Eve Kosofsky Sedgwick (2008 ) , Didier Eribon (2008 ) , David Cartier (2004 ) , David Eisenbach (2006 ) and other contributions that were undoubtedly essential to this endeavor