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Master's Dissertation
DOI
10.11606/D.18.2003.tde-06082003-172935
Document
Author
Full name
Alexandre Marques Buttler
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Machado Junior, Eloy Ferraz (President)
Correa, Marcio Roberto Silva
Sales, Almir
Title in Portuguese
Concreto com agregados graúdos reciclados de concreto : influência da idade de reciclagem nas propriedades dos agregados e concretos reciclados.
Keywords in Portuguese
agregado reciclado
concreto reciclado
reciclagem
retração por secagem
Abstract in Portuguese
Os resíduos de concreto apresentam grande potencial para serem reciclados quando comparados com outros resíduos, entretanto, o número de estudos realizados no Brasil é muito pequeno dificultando a utilização deste material em dosagens estruturais. Em virtude disso, desenvolveu-se um estudo teórico-experimental visando caracterizar algumas propriedades do agregado e do concreto reciclado; no estudo teórico exploraram-se aspectos relacionados à geração, deposição, processos para recuperação, britagem, casos práticos, pesquisas envolvendo reciclados de concreto e as recomendações normativas existentes. No desenvolvimento experimental, analisou-se a influência do período decorrido entre a moldagem e a reciclagem do concreto nas propriedades dos agregados e concretos. Os resultados indicam que resíduos reciclados logo após sua geração, contribuem positivamente para as propriedades mecânicas do concreto, devido à existência de grande quantidade de partículas não-hidratadas de cimento, tais concretos obtiveram resultados superiores para a resistência à compressão e tração quando comparados aos concretos com agregados naturais.
Title in English
Concrete with recycled concrete coarse aggregates : influence of age of recycling in the properties of recycled aggregates and concretes
Keywords in English
drying shrinkage
recycled aggregate
recycled concrete
recycling
Abstract in English
The concrete residues show a large potential to be recycled when compared with other residues; however, the number of studies in Brazil is very small hindering the use of this material in structural dosage. By virtue of that, it was developed a theoretical-experimental study to characterize some properties of aggregate and recycled concrete; in the theoretical study it was explored aspects related to the generation, deposition, processes for recovery, crushing, practical cases, researches involving recycled of concrete and the existent normative recommendations. In the experimental development, it was analyzed the influence of the period elapsed between the molding and the recycling of the concrete in the properties of the aggregates and concretes. The results indicate that residues recycled soon after generation, these contribute positively to the mechanical properties of the concrete due to the existence of large amount of nonhydrated cement particles, such concretes obtained results superiors for the compression strenght and tensile strenght when compared to the concretes with natural aggregates.
 
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buttler.pdf (6.13 Mbytes)
Publishing Date
2003-08-13
 
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