Recycled Aggregates
Mostrando 13-24 de 43 artigos, teses e dissertações.
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13. Avaliação de concreto auto-adensável com agregado reciclado de telha cerâmica / Evaluation of self-compacting concrete produced with the recycled aggregate tile
The increasing demand for raw materials in construction, especially those drawn from nature, is of great concern due to harmful impacts it produces. The use of recycled aggregates can be a sustainable and contribute to the preservation of natural resources, contributing to the sustainable development of the construction industry. The residue from the ceramic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2012
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14. Performance estimation for concretes made with recycled aggregates of construction and demolition waste of some Brazilian cities
The aim of this paper is to verify the influence of composition variability of recycled aggregates (RA) of construction and demolition wastes (CDW) on the performance of concretes. Performance was evaluated building mathematical models for compressive strength, modulus of elasticity and drying shrinkage. To obtain such models, an experimental program compris
Mat. Res.. Publicado em: 25/09/2012
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15. Concretes with red mud coarse aggregates
Red mud (RM) is a mineral waste, residue of the Bayer process used to obtain alumina from bauxite. While the exploration of rolled pebble damages the environment and is much more controlled by the government, the huge RM disposal areas do not stop increasing and polluting soil, rivers and groundwater sources in Amazon. In this work, the material mixtures use
Materials Research. Publicado em: 27/03/2012
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16. Estudo do uso do agregado miÃdo reciclado de concreto na produÃÃo de argamassa para revestimento vertical / Study of the use of recycled aggregate concrete in the production of mortar for coating vertical
The utilization of fine recycled aggregate originated from concrete debris recycling presents economics advantages, once recycled fine aggregate has lower costs than natural fine aggregate. Besides, there is an environmental gain due to the replacement of natural fine aggregate by recycled aggregate resulting in a in a reduction of damage caused by irregular
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/11/2011
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17. Caracterização e separabilidade de agregados miúdos produzidos a partir de resíduos de construção e demolição. / Technological characterization and separability studies on fine aggregates produced from construction and demolition waste.
The current demand for recycling on construction is due to the increasing consumption of aggregates, the exhaustion of deposits close to large cities as well as the ban on inert materials dumping in landfills and the rising cost of its disposal. Moreover, with the remarkable increasing on construction activities in many countries, the management of Construct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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18. Avaliação da influência da origem e do tratamento dos agregados reciclados de resíduos de construção e demolição no desempenho mecânico do concreto estrutural. / Evaluate the influence of origin and processing of recycled aggregates from construction and demolition waste on the mechanical performance of structural concrete.
A cadeia da construção civil é uma grande causadora de impactos ambientais, pois além do alto consumo de recursos naturais gera também grandes quantidades de resíduos. Isto traz elevados custos à sociedade pela necessidade de remoção e destinação dos resíduos, normalmente depositados em aterros. A reciclagem tem sido uma alternativa para reduçã
Publicado em: 2010
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19. Mechanical characterization using optical fiber sensors of polyester polymer concrete made with recycled aggregates
The sustainable management of solid wastes encourages metallurgic and metal-mechanic industries to look for safety applications for their wastes, thereby attenuating the environmental impact or lowering the costs. The study herein proposes strain monitoring the recycling of foundry sand with organic pollutants, as inert, in the manufacturing process of polym
Materials Research. Publicado em: 2009-09
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20. Propriedades de concretos produzidos com rejeito particulado de borracha em substituição parcial do agregado miúdo / Properties of concretes containing waste vulcanized rubber scrap particles replacement of finer aggregate
This work presents results from an investigation on the potential use of waste vulcanized rubber scrap (WRS) particles as aggregate in construction concretes. The waste rubber scrap used in this study was obtained from the local rubber manufacturing industry. In the preparation of concretes, the Brazilian Standard was followed to achieve the required amounts
Publicado em: 2009
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21. A study of using recycled aggregates in Portland concrete mixes for pavements / Estudo da utilização de agregado reciclado em misturas de concreto de cimento Portland para pavimentação
The objective of this research is to contribute to the study of the recycled aggregate use in concrete Portland. It is compared the performance of these mixtures presented with the deriving aggregates and the rubbish of technological control laboratories, which the use minimizes the problematic deposition in sanitary earthworks, contributing in this way to t
Publicado em: 2008
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22. Influência da substituição do agregado miúdo natural por agregado reciclado fino em propriedades de argamassas e concretos
Construction and demolition waste (CDW) recycling has been a good alternative to reducing the impact caused by the consumption and high demand of raw materials for civil construction. In this sense, it has been tried to incorporate those wastes in the production of concrete and decrease strength mortar, what would increase its potential use. This study was d
Publicado em: 2008
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23. Uso de agregados reciclados de concreto em blocos de alvenaria estrutural / Use of recycled concrete aggregates in blocks of structural masonry
The main goal of the present research project was the evaluation of recycled concrete aggregates incorporation in structural concrete blocks of three different levels of compressive strength (4,5 MPa, 8,0 MPa and 12,0 MPa). The study was developed in four stages. The first stage analyzed the physical properties of fine and coarse concrete aggregates derived
Publicado em: 2007
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24. Study of method to characterize the physical properties of construction and demolition waste coarse aggregates. / Estudo de métodos para caracterização de propriedades físicas de agregados graúdos de resíduos de construção e demolição reciclados.
The low consumption of Construction and Demolition Waste (CDW) recycled aggregates happens, nowadays, because its natural variability and quality control absence that limit its use in applications with larger demands, such as concretes. One way of concrete aggregates control is done by determining its porosity, express by physical properties absorption and r
Publicado em: 2007