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Master's Dissertation
DOI
10.11606/D.18.2003.tde-13112015-142759
Document
Author
Full name
Luiz Paulo Zuppani Ballista
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Machado Junior, Eloy Ferraz (President)
El Debs, Ana Lúcia Homce de Cresce
Ferreira, Osny Pellegrino
Title in Portuguese
Avaliação de algumas propriedades de concretos estruturais com agregados graúdos reciclados modificados com látex estireno-butadieno
Keywords in Portuguese
Agregado reciclado
Cimento Portland
Concreto
Látex estireno-butadieno
Polímero
Reciclagem de entulho
Abstract in Portuguese
Esta pesquisa objetiva avaliar o emprego de agregados graúdos reciclados (produzidos a partir do entulho de construção e demolição) e o emprego do látex estireno-butadieno (polímero sintético) nas propriedades de concretos estruturais de média resistência. Todos os estudos são conduzidos comparando-se as propriedades de concretos com agregados naturais sem adição de látex, e de concretos com agregados graúdos reciclados com e sem adição de látex. Na primeira fase da pesquisa, são avaliadas propriedades físicas e mecânicas destes concretos. São analisados três traços (com diferentes consumos de cimento) modificados com quatro percentagens de látex e submetidos a quatro formas de cura. Os resultados da primeira fase formam a base para a segunda fase da pesquisa, na qual apenas um dos traços contendo uma determinada porcentagem de látex e sob uma única forma de cura é submetido a ensaios em célula de corrosão acelerada e aderência aço-concreto. Como resultado principal, tem-se que o emprego conjunto de agregados graúdos reciclados e látex estireno-butadieno fornece concretos com resistência mecânica equivalente aos concretos contendo agregados naturais e com desempenho em ambientes agressivos e aderência aço-concreto também semelhantes. Conclui-se, portanto, pela viabilidade do emprego destes concretos como concreto estrutural armado no que tange às propriedades avaliadas.
Title in English
Evaluating of coarse recycled aggregates and the use of styrene-butadiene latex in the concrete constitution of medium resistance concrete structures
Keywords in English
Concrete
Portland cement
Recycled aggregates
Recycled debris
Styrene-butadiene latex and polymer
Abstract in English
This research aims at evaluating the use of coarse recycled aggregates (produced from construction and demolition debris) and the use of styrene-butadiene latex (synthetic polymer) in the concrete constitution of medium resistance concrete structures. All studies are carried out comparing the concrete properties with natural aggregates without latex, and concrete with coarse recycled aggregates with or without latex. In the first stage of the research, physical and mechanical properties of these concretes are evaluated (with different cement contents) modified with four percent of latex and submitted to four cure condition. The results of the first stage produce the base for the second stage of the research, where only one of the features containing a determinate percentage of latex and under a sole form of cure condition it is submitted to tests in accelerated corrosive cell and steel-concrete adherence. As a main result, it is believed that the joint usage of coarse recycled aggregates and styrene-butadiene latex provides mechanical resistant concrete equivalent to concrete containing natural aggregates with a similar performance in aggressive environments and with steel-concrete adherence. Due to the its employment feasibility, one can conclude that this concrete is structurally armed in as far as its properties were evaluated.
 
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Publishing Date
2015-11-13
 
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