Resistência à compressão de argamassas em função da adição de fibra de coco

Silva, Everton J. da; Silva, Paola D. da; Marques, Maria Lidiane; Fornari, Celso Carlino Maria; García, Fermin C.; Luzardo, Francisco Heriberto Martínez

doi:10.1590/1807-1929/agriambi.v18n12p1268-1273

Cited by 21 publications

(13 citation statements)

References 24 publications

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“…It is possible to confirm that both incorporations, natural and treated fibers, reduce the mass density in the hardened state of mortars when compared to the reference percentage (0%). This result had already been reported by other authors (Silva et al, 2014;Jaramillo et al, 2016) and is due to the lower density that the fibers have in comparison to the other materials used in the manufacture of mortars. The described fact is beneficial from the technological point of view since mortars with lower densities contribute less significantly to the weight loadings characteristic of buildings.…”

Section: Resultssupporting

confidence: 84%

Development of mortar for laying and coating with pineapple fibers

Azevedo

Marvila

Zanelato

et al. 2020

Rev. bras. eng. agríc. ambient.

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Brazil is one of the largest producers of pineapple in the world, which, in addition to bringing substantial benefits, contributes to increasing waste generation in the stages of processing, aiming at its consumption. The Brazilian environmental legislation has been increasingly more restrictive with respect to the disposal of solid waste, whether domestic, industrial or agro-industrial, which has stimulated studies related to the use of these materials in several matrices. This study aimed to evaluate the potentiality of using the natural fiber of pineapple (Ananas comosus), extracted from its leaves, as reinforcing material in cementitious composites. For this purpose, natural fiber extracted from the pineapple crown was incorporated in different percentages in relation to the cement mass: 0, 2.5, 5, 7.5 and 10%, and the fibers obtained were submerged in aqueous NaOH solution with 5% concentration in volume, for 1 h at room temperature. The following variables were evaluated: consistency, water retention, incorporated air, mass density in hardened state, mechanical strength, water absorption by immersion and capillarity, besides verifying the influence of the mode of fiber incorporation. It was observed that the treatment with NaOH solution and the percentage of natural pineapple fiber incorporated in up to 5% in relation to the cement mass form mortars with technological feasibility.

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Section: Resultssupporting

confidence: 84%

Development of mortar for laying and coating with pineapple fibers

Azevedo

Marvila

Zanelato

et al. 2020

Rev. bras. eng. agríc. ambient.

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“…Coconut fibers present a mean diameter about 0.2 mm. Before their use, fibers were cut with 25 mm length [30] and, subsequently, dried for 2 h in an oven at 100°C. Natural latex extracted from rubber trees (Hevea brasiliensis) was supplied by Mucambo S.A. and present a concentration of 53%.…”

Section: Methodsmentioning

confidence: 99%

A new treatment for coconut fibers to improve the properties of cement-based composites – Combined effect of natural latex/pozzolanic materials

Silva

Marques

Velasco

et al. 2017

Sustainable Materials and Technologies

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A B S T R A C TThis paper presents the results of experimental study with a new coconut fiber-cement composite (CFC). To obtain a material with improved performance in order to decrease the amount of calcium hydroxide present on the fiber surface, four forms of coconut fiber treatment were tested. Some combinations of natural latex, water and pozzolanic materials (silica fume or metakaolin) were evaluated by degradation test and accelerated aging through cycles of wetting and drying CFC samples. To determine the mechanical properties obtained from each treatment, flexural tests on CFC composites were performed. After the flexural tests, the fibers were removed from the specimens and analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), Fourier Transform Infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The results indicate that the treatment carried out with the natural latex polymer film combined with a pozzolan layer improved the performance and durability of the CFC.

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“…No trabalho de SILVA et al [8] foram produzidas argamassas cimentícias com adições de FC in natura com diferentes comprimentos (12,5; 25,0; 37,5; 50,0; 62,5 e 75,0 mm) e com um teor de adição de 0,3% em relação ao volume do compósito. O traço utilizado foi o 1:2,3:0,55 (cimento:agregado miúdo: relação água/cimento).…”

Section: Introductionunclassified

Avaliação dos efeitos da fibra de coco e da microcelulose cristalina nas propriedades de argamassas cimentícias

et al. 2020

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RESUMO Os materiais cimentícios são os mais utilizados mundialmente, na construção civil. Frente a isso, pesquisas são necessárias para melhorar tanto seu desempenho mecânico quanto seu desenvolvimento sustentável. Uma alternativa que busca essas melhorias é a adição de materiais de origem vegetal, como por exemplo, a fibra de coco e a microcelulose cristalina. Sendo assim, o objetivo do presente trabalho foi avaliar a influência das adições de fibra de coco (FC) e microcelulose cristalina (MCC) nas propriedades físicas e mecânicas de argamassas cimentícias. Para um melhor delineamento da pesquisa, esta foi dividida em três fases: caracterização dos materiais; análise de argamassas com adições de FC e argamassas com adições de MCC; análise de argamassas com adições de FC e MCC simultaneamente. Foram realizados os seguintes ensaios: índice de consistência, resistência à compressão, resistência à tração na flexão, módulo de elasticidade, absorção de água, índice de vazios, massa específica, Microscopia Eletrônica de Varredura (MEV) e Espectrografia por Dispersão de Energia (EDS). Os resultados encontrados demonstram que as incorporações de FC e MCC em teores acima de 0,2FC e 0,3MCC melhoram de forma significativa o desempenho das argamassas quanto aresistência à tração na flexão, porém não contribuem de forma positiva nas outras propriedades mecânicas das argamassas, mas sem prejuízos significativos para sua utilização. É recomendável estudos de argamassas com FC e MCC a longo prazo para verificar se as propriedades mecânicas sofrem influências significativascom a idade.

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Resistência à compressão de argamassas em função da adição de fibra de coco

Cited by 21 publications

References 24 publications

Development of mortar for laying and coating with pineapple fibers

Development of mortar for laying and coating with pineapple fibers

A new treatment for coconut fibers to improve the properties of cement-based composites – Combined effect of natural latex/pozzolanic materials

Avaliação dos efeitos da fibra de coco e da microcelulose cristalina nas propriedades de argamassas cimentícias

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