Pozolanicidade dos resíduos industriais, lã de vidro e lã cerâmica

Evangelista, Neuza; Tenório, Jorge Alberto Soares; Oliveira, José Roberto de

doi:10.1590/s0370-44672012000100011

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…A incorporação de resíduos LV contribuiu com o aumento da resistência à tração e à compressão quando se compara o traço E90 com o traço E90LV. Esses resultados reforçam estudos anteriores que apontaram melhorias após a inserção de resíduos fibrosos e também de pesquisas que avaliaram individualmente a incorporação de resíduos de lã de rocha ou lã de vidro às argamassas [6,26,[29][30][31][32] Tabela VII -Caracterização das argamassas -estado endurecido (valores médios).…”

Section: Resultsunclassified

Argamassas com resíduos para revestimento isolante térmico de parede pré-moldada de concreto

Passos

Carasek

2018

Cerâmica

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Resumo Inserido em contexto de preocupações com desempenho térmico e sustentabilidade na construção civil, este trabalho visou desenvolver argamassas com propriedades isolantes térmicas para revestimento de paredes pré-moldadas de concreto. O programa experimental avaliou três dosagens de argamassa com resíduo de poliestireno expandido (EPS) e resíduo da produção de placas isolantes termoacústicas (contendo fibras de lã de rocha, lã de vidro e vermiculita expandida), e uma dosagem de referência. Caracterizou-se o resíduo por meio de MEV, DRX, FRX e picnometria a gás hélio. Efetuaram-se ensaios das argamassas (estado fresco e endurecido), do revestimento aplicado (resistência de aderência e permeabilidade à água) e avaliação do desempenho térmico do sistema de vedação. Os resultados demonstraram potencial das argamassas com resíduos como revestimento isolante (valores de condutividade térmica até quatro vezes inferiores aos de referência). A inserção do resíduo com fibras otimizou propriedades mecânicas das argamassas e do revestimento (resistência à tração e de aderência).

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Section: Resultsunclassified

Argamassas com resíduos para revestimento isolante térmico de parede pré-moldada de concreto

Passos

Carasek

2018

Cerâmica

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“…The treatment and / or volume reduction of waste presents technical and operational limits. The alternatives for recycling or re-use are the most appropriate strategies in the management of residues, and there is even in this approach, a waste marketing search, having as assumptions: (i) policy to reduce; (ii) recycle; (iii) reuse; (iv) add value to the residue; (v) reducing cost of treatment and final disposal; (vi) guidance on the appropriate management of waste and finally (vii) search for continuous improvement [5].…”

Section: Introductionmentioning

confidence: 99%

Study of the Sintering Dental Ceramic Waste from ZrO2-Y2O3 System

Silva¹,

Acchar²,

Silva³

2016

MSF

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During processing of zirconia blocks, where they are used for different dental implants type, most of the loosed material as a powder is subsequently discarded. Besides damage to the environment, waste of material results in financial losses, resulting in higher final cost of treatment. The yttria stabilized zirconia (Y-TZP) has a variety of applications due to it is combination of high strength and fracture toughness. The objective was to reuse zirconia waste analyzing the effects of sintering temperature. The starting materials used in this study were two different powders of ceramic system ZrO3-Y2O3: commercial zirconia nanoparticle and microparticle zirconia waste. The raw material was shaped by uniaxial and isostatic pressing and then sintered at 1500, 1550 and 1600 ° C over 1 hour. The X-ray diffraction (XRD) and dilatometry were used to powder characterization. After sintering density / porosity, flexural strength, and scanning electron microscopy (SEM) were realized .The waste showed similar values of density, and grain size to commercial material studied, confirming that it can be reused.

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“…Regarding solid waste, it must be emphasized that the management of industrial by-products needs to consider a work perspective that is supported by a program to mitigate emissions directly at the generating source, as well as through the recycling mechanism itself (Evangelista, Tenório and Oliveira, 2012). Associated with the search for this reduction, the cement industry seeks, through the use of mineral admixtures, to reduce costs with the production of cement, mainly of an energy order, and that, in line with this, it was possible to obtain benefits in the quality of the final product (Garcia, Cabral Junior, Quarcioni and Chotoli, 2015).…”

Section: Introductionmentioning

confidence: 99%

Highlights on the properties of the soda-lime-silicate glass residue that enable its use as filler in ultra-high performance concrete

Oliveira

Meira

Lucena

2021

RSD

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The exponential advancement of cutting-edge technologies in the scope of civil construction, seeks to give cement-based materials the eco-efficient potential linked to mechanical performance that enables different applications. This work aims to evaluate the glass residue regarding the pozzolanic potential through ABNT NBR 5752:2014, as well as to verify whether through the characterization tests of x-ray fluorescence, x-ray diffraction and laser diffraction granulometry, if it is viable of application as supplementary cementitious material (filler), in ultra-high performance concrete. The glass residue submitted to the tests proposed in this study, was crushed in a jaw crusher, milled in a bench ball mill at 47 rpm, and was sieved in a 75 µm opening mesh (ABNT nº 200 mesh). For the test of pozzolanic activity, CP II F-40 class cement, normal sand, water from the public supply network, and superplasticizer additive were used for the mix with 25% of the residue replacing cement, while for the other characterization techniques, the glass residue was applied in its processed form (after sieving), dry or wet. The evaluated glass residue did not reach the minimum rate of 75% established by ABNT NBR 5752:2014, achieving only 45.72%, being classified as non-pozzolanic, which indicates its inert behavior in the presence of calcium hydroxide. The characterization tests confirmed, based on the specialized literature on ultra-high performance concrete, its viability as a filler when adopted as an alternative raw material for presenting chemical and mineralogical composition, in addition to granulometric distribution, very close to those used in studies that demonstrated satisfactory results when using the glass residue as an input.

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Pozolanicidade dos resíduos industriais, lã de vidro e lã cerâmica

Cited by 3 publications

References 3 publications

Argamassas com resíduos para revestimento isolante térmico de parede pré-moldada de concreto

Argamassas com resíduos para revestimento isolante térmico de parede pré-moldada de concreto

Study of the Sintering Dental Ceramic Waste from ZrO<sub>2</sub>-Y<sub>2</sub>O<sub>3</sub> System

Highlights on the properties of the soda-lime-silicate glass residue that enable its use as filler in ultra-high performance concrete

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