Avaliação da tipologia dos resíduos de construção civil entregues nas usinas de beneficiamento de Belo Horizonte

Carmo, Daniel de Souza; Maia, Nilton da Silva; César, Cristina Guimarães

doi:10.1590/s1413-41522012000200008

Cited by 5 publications

(5 citation statements)

References 2 publications

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“…Como alternativa para corrigir ou atenuar tal problema, poder-se-ia realizar a reciclagem dos RCD, minimizando a degradação ambiental por reduzir a disposição inadequada no ambiente (Carmo, Maia & César, 2012;Siqueira, 2015).…”

Section: Resultsunclassified

Cálculo da evolução temporal de área degradada às margens do rio Tapacurá na Zona da Mata de Pernambuco, Brasil

Lorena¹,

Bezerra²,

Santos³

et al. 2018

J. Env. Anal. Progr.

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Atualmente no município de Vitória de Santo Antão em Pernambuco ocorre crescimento econômico por causa dos investimentos na área industrial, com elevação da população urbana e decrescimento da população rural. A combinação de ações impactantes ao meio ambiente da redução dos recursos naturais com ação de impactos antrópicos negativos gera a degradação ambiental, em muitos casos, ocorre devido a despreocupação humana com a sobrevivência das futuras gerações por conta das necessidades atuais de infraestrutura urbana. O objetivo deste trabalho consiste em identificar a degradação ambiental por ações antrópicas em área urbana as margens do rio Tapacurá no município de Vitória de Santo Antão-PE, utilizando técnicas de geoprocessamento de dados em área delimitada. Com o auxílio do Google Earth Pro foram analisadas as áreas vegetadas nos mapas nos meses de julho de 2006, junho de 2011 e novembro de 2015. A área estudada foi considerada degradada após avaliação visual local, através de construções irregulares, ocorrendo a incidência de aterro com resíduos de construção e disposição incorreta de resíduos sólidos, o que provocou danos a vegetação em especial nas matas ciliares as margens do rio, com resultados de área vegetada em evolução decrescente nos anos 2006, 2011 e 2015, respectivamente de 61,65%, 40,30% e 13,49%, totalizando 86,51% de degradação da área de estudo, o que prejudica o escoamento de água em períodos de altas precipitações, gerando camadas impermeáveis em áreas de vales, o que o causa vulnerabilidade as áreas urbanas a riscos de inundações.

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Section: Resultsunclassified

Cálculo da evolução temporal de área degradada às margens do rio Tapacurá na Zona da Mata de Pernambuco, Brasil

Lorena¹,

Bezerra²,

Santos³

et al. 2018

J. Env. Anal. Progr.

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“…Fine quartz aggregates (natural sand) together with gneiss coarse aggregates (gravel 0 -#. 4.75/12.5 mm and 1 -#. 9.5/12.5 mm), materials which available in the local market were also used.…”

Section: Methodsmentioning

confidence: 99%

Influence of Heterogeneity, Typology, and Contaminants of Recycled Aggregates on the Properties of Concrete

Neto¹,

Oliveira²,

Salles³

et al. 2021

TOBCTJ

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Background: The depletion of raw material resources, the preservation of the environment, and the need to compensate economic imbalances drive research efforts regarding the application of Construction and Demolition Waste (CDW) in concretes. Objective: This paper aimed to assess the influence of the heterogeneity, typology, and presence of contaminants of CDW (collected in different seasons and locations) on the mechanical properties and durability of concretes. Methods: Characterization procedures were performed for the aggregates (visual quantification and physical properties of the constituents), and for the concretes (compressive strength, splitting tensile strength test, modulus of elasticity, water absorption, porosity, electrical resistivity, carbonation depth, and digital microscopy). The replacement rate of natural aggregate for CDWA was of 20% in three different particle sizes: sand, gravel 0, and gravel 1. Results: The characteristics of the samples of CDW were very variable, influenced by the season and location of collection. The presence of materials with elevated porosity (ceramics, mortars) was observed in some samples and required increases in mixing water volume to keep the concretes’ consistency. A wide variation in mechanical properties caused by the CDWA constituents was also observed. Regarding the durability of the concretes, it was proven the greatest sensibility of this property to contaminants, thus requiring the removal of deleterious materials to using CDWA in structural concretes in order to avoid the formation of vesicles and guaranteeing their life span. Conclusion: The heterogeneity, typology and contaminant content significantly influence the analyzed properties. Besides, the segregation of waste at source makes the use of CDWA feasible in concretes.

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“…Bernardes et al (2008) have noticed that in Brazil, about the sources of the C&DW generation, 41% (in volume) are related to new construction works and 59% from demolitions, extensions and renovations. de Carmo et al (2012) comment that 64.1% of the C&DW produced (in volume) comes from renovations; 18.2% from new works; 7.1% from demolitions; and 10.6% from other activities.…”

Section: Literature Reviewmentioning

confidence: 99%

Environmental indicators proposal for construction solid waste management plans assessment

Filho¹,

Bezerra²,

Dias

2020

MEQ

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PurposeThe civil construction industry has vital importance to Brazil's economy. However, this sector is also responsible for the environmental impacts. Governments have been taking measures aiming to mitigate these impacts. Among these, the elaboration and implementation of civil construction solid waste management plans can be highlighted. However, these plans still lack standardizations and tools for their evaluation. Environmental indicators proposal for construction solid waste management plans assessment is presented to verify the adhesion of these to environmental laws, technical standards and green building certification systems recommendations.Design/methodology/approachThe construction solid waste management plans of three construction works were evaluated by the proposed indicators to verify the procedures related, generating, in the end, a scale between 0 and 5. After that, plans were compared with each other.FindingsThe proposed indicators have made possible the evaluation of the environmental practices performed for three different construction works. By the proposed indicators, the environmental practices were compared to technical standards and legislation suggested procedures.Practical implicationsAs a contribution, the evaluation proposal presented may help the construction industry as well as the public authority to evaluate the construction solid waste management plans currently elaborated, so that these can offer a quality improvement and more effective environmental measures.Originality/valueMethodologies that guide the evaluation of construction solid waste management plans can be beneficial for the construction companies, which can improve the quality of the plans elaborated internally and verify the effectiveness of the plans elaborated by specialized consultancies. In general, most of the construction solid waste management plans are prepared with the purpose of only complying with the legislation, more specifically of the National Council for the Environment, Resolution 307/2002.

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Avaliação da tipologia dos resíduos de construção civil entregues nas usinas de beneficiamento de Belo Horizonte

Cited by 5 publications

References 2 publications

Cálculo da evolução temporal de área degradada às margens do rio Tapacurá na Zona da Mata de Pernambuco, Brasil

Cálculo da evolução temporal de área degradada às margens do rio Tapacurá na Zona da Mata de Pernambuco, Brasil

Influence of Heterogeneity, Typology, and Contaminants of Recycled Aggregates on the Properties of Concrete

Environmental indicators proposal for construction solid waste management plans assessment

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