Fixação de placas de rochas ornamentais: estudo da aderência com argamassa colante

Nogami, Lizandra

doi:10.11606/d.18.2007.tde-07052008-085848

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Conforme relatado por Nogami (2007), a resistência de aderência em substratos pouco porosos está intimamente relacionada com a área de contato superficial entre os materiais aderidos. Sendo as placas cerâmicas antigas levemente asperas, elas tendem a apresentar área superficial consideravelmente maior do que uma placa cerâmica lisa.…”

Section: Resultsunclassified

“…A fim de minimizar o efeito gerado por substratos pouco porosos, a solução, segundo Nogami (2007), é alterar a superfície de contato, favorecendo a ancoragem através da rugosidade dos substratos, pois para revestimentos com pouca ou nenhuma absorção de água, a resistência de aderência está intimamente relacionada com a área de contato entre os materiais aderidos. Segundo Mansur (2007), uma solução para minimizar o efeito do acúmulo de água gerado pela baixa absorção do substrato é o uso de aditivos poliméricos.…”

Section: Introductionunclassified

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Avaliação dos mecanismos de aderência entre argamassa colante e substrato não poroso

Pereira

Silva²,

Costa

2013

Ambient. constr.

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Resumo resistência de aderência de um sistema de revestimento cerâmico é uma das mais importantes propriedades deste tipo de acabamento. O conhecimento das propriedades dos substratos e argamassas, e a capacidade de bem avaliar a interação entre os elementos são preceitos básicos para construírem-se revestimentos duráveis. Nesse sentido, o aperfeiçoamento dos modelos que descrevem os mecanismos de aderência, objetos de estudo deste trabalho, são essenciais, principalmente devido a diferenças nas características dos materiais relativas à porosidade, verificadas tanto em substratos como nas placas. O planejamento experimental consistiu no assentamento de um revestimento cerâmico externo utilizando-se a técnica de piso sobre piso, ensaios de resistência de aderência, aquisição de imagens em MEV dos pisos retirados do campo de testes e caracterização das argamassas colantes de estudo. Os resultados mostraram uma relação entre a resistência de aderência e a extensão de contato entre a argamassa e o substrato, indicando que o mecanismo de aderência para o assentamento de placas sobre substratos não porosos está diretamente relacionado com a extensão do contato entre os materiais, resultando em um modelo de aderência para o caso de revestimento cerâmico em substrato pouco poroso. Palavras

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Section: Resultsunclassified

Section: Introductionunclassified

Avaliação dos mecanismos de aderência entre argamassa colante e substrato não poroso

Pereira

Silva²,

Costa

2013

Ambient. constr.

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“…In M1 the water quantity was reduced from 0.4 to 0.25; in M2 the cement HIR (High Initial Resistance) was replaced by structural white cement; and in M3 the amount of polymer was doubled and the amount of water decreased from 0.4 to 0.3. For the production of the standard substrate, where the test specimens were set, Portland cement (CP II E 32), medium sand and gravel (crushed 0) were used, following the guidelines of NBR 14082 standard [2] and the procedures adopted by Nogami [3].…”

Section: Global Stone Congressmentioning

confidence: 99%

Influence of the Mineralogical and Mortar Components on the Adherence of Some “Granites”

Nogami

Paraguassú

Rodrigues

et al. 2013

KEM

Self Cite

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Rock plate setting can be performed with metal inserts or by mortar adhesion. For mortar setting, the adhesion bond strength values, as a rule, should be above 1 MPa. In the present work, tests with eight types of “granite” tiles were performed to compare the adherence of five types of mortars. The rocks chosen were: Red Brasilia (syenogranite), Black Indian (migmatite), Green Labrador (charnockite), Black Sao Gabriel (hypersthene diorite), Rose Jacaranda (nebulitic migmatite syenogranite), Fantastic Blue (biotite monzogranite megaporphyritic serial gneissified), Grey Swallow (monzogranite) and Yellow Ornamental (garnet porphyroblastic gneiss), which do not have similar petrographic and sawability characteristics, thereby resulting in different initial roughness values of the plates obtained by breaking apart the blocks on the gangsaw machine, which use granulated steel as an abrasive element. The adherence of these rocks with the mortars was determined in the rough surface as well as in the polished surface by the pullout traction test, standardized for ceramics. The results showed that the mortar adhesion is related to roughness, to mineralogy and to the texture of these rocks. To verify this relationship, tensile bond strength tests were performed with the main mineral components of these rocks using single crystals with known optical orientation. Moreover, the microstructure study of the standard substrate/mortar/rock set was also performed.

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“…Natural stones have been widely used for construction purposes not only because of their appreciated aesthetic qualities, but also for its strength, durability, and wide availability [4]. Besides, these materials demonstrate good performance protecting the structures against weathering and providing good thermal insulation [5].…”

Section: Introductionmentioning

confidence: 99%

Ecological Fickerts Used in the Dimension Stones Polishing Reinforced with Silica from the Rice Hull Ash

Dorigo

Silveira

Almeida

2020

KEM

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The processing stages of the dimension stones industry uses inputs mainly from petroleum-derived chemicals that can cause damages to the environment and to the human health. Therefore, there is a need to develop more ecological and sustainable technologies aiming to replace the conventional inputs by less aggressive ones. From this, ecological fickerts made from polyurethane castor oil resin (Ricinus communis L.), silicon carbide (SiC), silica from rice hull ash (RHA) and synthetic diamonds were developed in order to compare them with the epoxy resin fickerts currently used in industry. For such, each half of a Brazilian granite slab was polished using each different type of fickerts and the gloss measures results were compared. It was found that the side of the slab polished using the ecological fickerts presented brightness values about 10 Gloss Units (GU) greater than the other side polished with the conventional abrasives. In addition, the ecological fickerts presented lower wear values, and consequently lower mass loss compared to the conventional ones. These results indicate that the ecological fickerts are a good alternative to the dimension stones polishing, even considering sustainability aspects and more eco-efficiency inputs materials.

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Fixação de placas de rochas ornamentais: estudo da aderência com argamassa colante

Cited by 7 publications

References 2 publications

Avaliação dos mecanismos de aderência entre argamassa colante e substrato não poroso

Avaliação dos mecanismos de aderência entre argamassa colante e substrato não poroso

Influence of the Mineralogical and Mortar Components on the Adherence of Some “Granites”

Ecological Fickerts Used in the Dimension Stones Polishing Reinforced with Silica from the Rice Hull Ash

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