Obtenção de concreto leve utilizando agregados reciclados

Gomes, Paulo César Correia; Alencar, Tatiana Frassy Falcão de; Silva, Natália Vieira da; Moraes, Karoline Alves de Melo; Angulo, Sérgio Cirelli

doi:10.1590/s1678-86212015000300024

Cited by 16 publications

(15 citation statements)

References 12 publications

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“…WA as a function of FA and different CDW granulometries is shown in Figure 6; increases in FA associated to increases in WA were observed. This phenomenon occurs given an increase of total AV and an increase in the connectivity between pores (higher capillarity) [23]. Curve intersections indicate that there was an interaction between FA and CDWG (factors); that is, there was different behavior in terms of WA at different levels of CDWG and FA.…”

Section: Water Absorption (Wa)mentioning

confidence: 97%

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Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks

et al. 2017

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Featured Application: The use of construction and demolition waste (CDW) in the development of building materials has been done constantly. The CDW from Passo Fundo region of Rio Grande do Sul/Brazil can be used in development of foamed concrete fully replacing the natural sand. Abstract:The main objective of this study was to evaluate the use of construction and demolition waste (CDW) from the Passo Fundo region of Rio Grande do Sul (RS), Brazil, in the development of aerated foamed concrete. This waste had not yet been characterized or even reused. CDW was processed (sieved only), characterized, and used as an aggregate, completely substituting natural sand. The influence of CDW granulometry and the amount of foam upon compressive strength, wet and dry bulk density, water absorption, and the air voids of concrete blocks were determined. Results showed that CDW has regular characteristics for the development of aerated foamed concrete. Compressive strength and density decreased as the amount of foam increased, while water absorption and air voids also increased. Also, CDW that was classified as coarse showed higher compressive strength. On average, CDW medium-sized particles had a higher air void content, while water absorption showed little variation with respect to granulometry. CDW residue from the region of study can be used as aggregate for the development of aerated foamed concrete. However, it must characterized before being used to guarantee the quality of the final product.

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Section: Water Absorption (Wa)mentioning

confidence: 97%

“…A construction material that does not require structural function is lightweight concrete, which is defined as hardened concrete with a specific mass between 800-2000 kg/m 3 [23]. Aerated concretes are a variation within lightweight concretes that have a specific mass between 320-1920 kg/m 3 and a compressive strength above 1.5 MPa [24].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks

et al. 2017

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“…According to Figure 5b, the more foam is added, the greater the water absorption. This occurs due to the increase in total voids and the connectivity between the pores (capillarity) [4,63].…”

Section: Degrees Of Freedommentioning

confidence: 99%

“…This has not yet been widely applied. For example, in Brazil, only, approximately 20% of CCW is reused [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Additives, Cement Type, and Foam Amount on the Properties of Foamed Concrete Developed with Civil Construction Waste

et al. 2019

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The main objective of this study was to evaluate the use of additives in producing foamed concrete blocks, which were made by totally replacing natural sand with civil construction waste (CCW). The concrete blocks were developed in accordance with an experimental design that used the complete factorial statistical method, for which three factors with different levels were considered: cement type (CP-V, CP II-Z, and CP II-F); use of additive (without additive, plasticizer, air entrainment, and superplasticizer) and foam amount (5.7%, 7.7%, and 9.5% of the total mass). The influence of each factor and the interactions between them were assessed on the following response variables: compressive strength, dry and saturated density, air voids, water absorption, and thermal conductivity. The results show that all factors had a significant influence on the variable response. For example, the use of the superplasticizer additive resulted in higher compressive strength, lower density, lower air void, and lower thermal conductivity. Finally, the use of additives had little influence on the response variables in relation to the other factors.

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“…É possível a aplicação do material na cadeia produtiva das atividades de construção. No Brasil, muitos pesquisadores já investigaram os danos da alta geração de RCD e buscaram incorporá-lo em diversos materiais no ciclo da construção civil (GOMES et al, 2015;MESQUITA et al, 2015;SANTOS et al, 2015;CONTRERAS et al, 2016;SILVA & ANDRADE, 2017;ANDRADE et al, 2018).…”

Section: Introductionunclassified

Comportamento Mecânico De Alvenarias De Terra Com Resíduos De Construção E Demolição

Bessa¹,

Mello

Belo

et al. 2019

MIX Sustentável

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Cerca de 60% de todo o resíduo sólido gerado no país provem das atividades do ramo da construção civil, cerca de 45 milhões de toneladas de resíduos de construção e demolição (RCD) por ano. É viável utilizar o RCD na fabricação de componentes ecoeficientes e a mescla do material com a terra apresenta-se como uma das possibilidades. Contudo, os estudos que analisam o comportamento dos componentes em terra em sistemas construtivos ainda são incipientes e carecem de maior aprofundamento, principalmente quando há o uso de resíduos. O objetivo deste artigo foi investigar o comportamento mecânico de blocos e de alvenarias de terra comprimida produzidos com RCD e estabilizados com dois tipos de cimento, a fim de avaliar a compatibilidade entre esses materiais. Avaliou-se a resistência à compressão axial, o índice de absorção e a durabilidade de corpos de prova, além do comportamento mecânico de prismas contrafiados de alvenaria produzidos com RCD. Os resultados mostraram que o cimento pozolânico não apresentou compatibilidade com os demais materiais mas que os resultados mecânicos obtidos pelos prismas atestam a compatibilidade entre o solo utilizado, o RCD e o cimento CPV na produção de BTCs para alvenarias de vedação.

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Obtenção de concreto leve utilizando agregados reciclados

Cited by 16 publications

References 12 publications

Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks

Characterization and Use of Construction and Demolition Waste from South of Brazil in the Production of Foamed Concrete Blocks

Effect of Additives, Cement Type, and Foam Amount on the Properties of Foamed Concrete Developed with Civil Construction Waste

Comportamento Mecânico De Alvenarias De Terra Com Resíduos De Construção E Demolição

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