Effect of wood particle geometry and pre-treatments on the strength and sorption properties of cement-bonded particle boards

Amiandamhen, Stephen; Izekor, D. N.

doi:10.31018/jans.v5i2.324

Cited by 14 publications

(8 citation statements)

References 7 publications

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“…It was concluded that the modification of fibres results in improved surface properties and reduced hydroxyl groups, thereby enhancing the properties of the composite material. Similarly, the use of cement setting accelerators, which reduces the hydration time of cement has been reported to yield good results [2,15,20].…”

Section: Introductionmentioning

confidence: 99%

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Amiandamhen

Osadolor

2020

J Mater Cycles Waste Manag

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There is a growing interest on recycling of waste fibres as an alternative to landfill disposal. The aim of the study was to investigate the durability and mechanical properties of waste paper-cement composite panels reinforced with varying kenaf fibre content (FC, 2-10%). The panels produced were evaluated for properties including modulus of rupture (MOR) and apparent modulus of elasticity (MOE). The resistance of the panels was tested in the field for both termite damage and fungi decay for a period of 24 weeks. Accelerated decay test was also performed on selected samples. The results showed that the mean MOR ranged from 3.17 MPa for samples with 10% FC to 4.84 MPa for samples with 8% FC. The mean MOE ranged from 248 MPa for samples with 10% FC to 1298.1 MPa for samples with 8% FC. Statistical analysis showed that the effect of the fibre content was significant on the properties evaluated (p < 0.05). The study concluded that the optimum fibre content for improving the strength and physical properties of paper-cement composites in a ratio of 1:1 (w/w) using kenaf as reinforcing fibre is 8%. The panels were highly resistant to both termite and fungi attack for the study duration.

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Section: Introductionmentioning

confidence: 99%

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Amiandamhen

Osadolor

2020

J Mater Cycles Waste Manag

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“…Neste contexto, cabe destacar as espécies do gênero Pinus pesquisadas por Lima et al (2011); espécies de Eucalyptus, por Iwakiri e Prata (2008), Castro et al (2015) e Iwakiri et al (2015); além de espécies de madeiras tropicais como Schizolobium amazonicum e Cecropia hololeuca (IWAKIRI et al (2012) e Gmelina arbórea (AMIANDAMHEN;IZEKOR (2013).…”

Section: Introductionunclassified

EFEITOS DO TRATAMENTO DE PARTÍCULAS E ACELERADORES DE ENDURECIMENTO NA PRODUÇÃO DE PAINÉIS CIMENTO-MADEIRA DE Hevea brasiliensis

Iwakiri

Trianoski

Weber³

et al. 2017

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ResumoA Hevea brasiliensis (seringueira) é uma espécie nativa da Amazônia e apresenta elevada importância econômica no Brasil, por ser amplamente utilizada na obtenção de latéx para produção de borracha. Os plantios comerciais da Hevea brasiliensis estão localizados principalmente no interior do estado de São Paulo e se encontram ainda na fase de extração de látex, tendo a necessidade de estudos tecnológicos para a utilização da sua madeira ao final do seu ciclo. Na busca por alternativas para uso industrial da sua madeira, esta pesquisa teve como objetivo avaliar o seu potencial para produção de painéis cimento-madeira. Para a produção de painéis experimentais foram empregadas partículas de madeira tratadas por imersão em água fria por 24h, água quente por 6h e hidróxido de sódio (NaOH) por 2 horas; e Cloreto de cálcio (CaCl 2 ) e Silicato de Sódio (Na 2 SiO 3 ) como aceleradores de endurecimento do cimento. Os painéis foram produzidos com densidade nominal de 1,10 g/cm³, relação madeira cimento de 1:2,75, fator água cimento de 0,4 e 3% de aceleradores de cura. Os ensaios físicos e mecânicos dos painéis indicaram melhores resultados para os painéis produzidos com partículas tratadas em água quente por 6 horas e uso do cloreto de cálcio como acelerador de endurecimento. Os resultados permitem concluir que a madeira de Hevea brasiliensis (RRIM 600) apresenta potencial para a produção de painéis cimento-madeira. Palavras-chave: Seringueira; plantio florestal; extrativos da madeira; construção civil. AbstractEffects of particles treatments and cement accelerator admixture in the wood cement panel production. Hevea brasiliensis (rubber tree) is a native species of the Amazon and has a high economic importance in Brazil, since it is widely used in obtaining latex for rubber production. The commercial plantations of Hevea brasiliensis are located mainly in the São Paulo State and are still in the latex extraction phase, and there is the need for technological studies to use their wood at the end of cycle. In the search for alternatives for industrial use of its wood, this research aimed to evaluate its potential for the production of cement-wood panels. For the experimental panels manufactures were used wood particles treated by immersion in cold water for 24h, hot water for 6h and sodium hydroxide (NaOH) for 2 hours; and Calcium Chloride (CaCl 2 ) and Sodium Silicate (Na 2 SiO 3 ) as curing hardener. The panels were produced with nominal density of 1.10 g/cm³, wood cement ratio of 1:2.75, water cement factor of 0.4 and 3% of curing hardener. The physical and mechanical tests of the panels indicated better results for the panels produced with particles treated in hot water for 6 hours and the use of calcium chloride as a cement accelerator admixture. The results of the research indicated that the wood of Hevea brasiliensis (RRIM 600) has potential for wood cement panels manufacture.

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“…These limitations have been addressed by several techniques, for example, hot water extraction and leaching in cold water have been effective in removing the detrimental components [18,19] and chemical extractions have also shown positive effects [17,20,21]. The use of cement curing accelerators like CaCl 2 , MgCl 2 and CaCO 3 has been helpful in eliminating the need to pre-soak the wood particles [1,22,23]. Other methods that have been used to improve compatibility between wood and cement are fungal treatment of wood [24]; application of blocking layers around wood particles [25]; CO 2 treatment [26,27]; and the addition of pozzolans, such as volcanic ash, fly ash, rice husk ash and condensed silica fume [18,28].…”

Section: Portland Cement Bonded Compositesmentioning

confidence: 99%

Phosphate bonded natural fibre composites: a state of the art assessment

2019

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Over the last few decades, innovative wood composite products and processes have created markets for new and existing products. Inorganic bonded fibre composites have been developed for high performance applications using conventional cement and concrete. The demands for wood based composites along with increasing economic and environmental concerns on conventional wood products necessitate moving beyond the traditional processing methods to more cost-effective and environmentally friendly approaches. In the wake of the twenty-first century, a fast-setting phosphate binder with a low carbon footprint was developed, which can alternatively be utilized in wood composite development. This paper reviews the recent progress in phosphate bonded composite products, based on published literature from the last two decades. A brief background on Portland cement based natural fibre composites is presented. In addition, the mechanism of the formulation of phosphate binders, the effect of aggregates in the materials and the environmental benefits accruable to such materials are discussed.

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Effect of wood particle geometry and pre-treatments on the strength and sorption properties of cement-bonded particle boards

Cited by 14 publications

References 7 publications

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

Recycled waste paper–cement composite panels reinforced with kenaf fibres: durability and mechanical properties

EFEITOS DO TRATAMENTO DE PARTÍCULAS E ACELERADORES DE ENDURECIMENTO NA PRODUÇÃO DE PAINÉIS CIMENTO-MADEIRA DE Hevea brasiliensis

Phosphate bonded natural fibre composites: a state of the art assessment

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