Development of coconut coir-based lightweight cement board

Asasutjarit, Chanakan; Hirunlabh, Jongjit; Khedari, Joseph; Charoenvai, Sarocha; Zeghmati, Belkacem; Shin, U–Cheul

doi:10.1016/j.conbuildmat.2005.08.028

Cited by 243 publications

(154 citation statements)

References 12 publications

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“…Asasutjarit et al 26 found that the best performance of cement/coir boards were those with coir fiber lengths between 1 to 6 cm. According to those researchers long fibers decrease the workability and increase the void space.…”

Section: Raw Materialsmentioning

confidence: 99%

Coir and Sisal Fibers as Fillers in the Production of Eucalyptus Medium Density Particleboards - MDP

et al. 2016

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The aim of this study was to evaluate the potential use of sisal and coir fibers in combination with Eucalyptus particles for the production of particleboard. The particleboards were produced in three layers. The first and third layers (face) were made with small Eucalyptus particles. The second layer (core) was made with big Eucalyptus particles in combination with coir or sisal fibers. The particleboards were prepared with the substitution on Eucalyptus wood for sisal and coir fibers in the particleboards core, in doses of 0, 10, and 20%, relative to the total mass of particles. The particleboards were characterized by mechanical, physical and thermal properties. The results were not satisfactory for particleboards with sisal. However, for coir particleboards the physical-mechanical properties were very similar to those particleboards produced only with Eucalyptus. This work demonstrates the potential use of the coir that is commonly disposed in landfills on the Brazilian beaches.

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Section: Raw Materialsmentioning

confidence: 99%

Coir and Sisal Fibers as Fillers in the Production of Eucalyptus Medium Density Particleboards - MDP

et al. 2016

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“…According to Wang and Huang (2009), about 55 billion coconuts are harvested annually in the world, but only 15% of the husk fibers are currently recovered for consumption. Hence, research and development efforts have been undertaken to find new use for coir, e.g., as a reinforcement in polymer composites (Monteiro et al 2008;Satyanarayana et al 2009;Asasutjarit et al 2009;Ali 2010;Yao et al 2012), cement composites, and particle board for building construction (Khedari et al 2004;Agopyan et al 2005;Asasutjarit et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Linerboard Made from Soda-Anthraquinone (Soda-AQ) Treated Coconut Coir Fiber and Effect of Pulp Beating

Main¹,

Talib²,

Ibrahim³

et al. 2015

BioResources

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The performance of coir fiber in the production of linerboard made from soda-anthraquinone (soda-AQ) pulp was evaluated. Based on chemical analysis, the composition of coir fiber is suitable for the pulping process. Out of nine pulping conditions characterized, a pulping condition of 18% active alkali for 90 min cooking time was chosen. These conditions provided the highest screened yield (48.99%), a low rejection yield (0.27%), high viscosity (11.73 cP), and a kappa number (41) that is acceptable for unbleached linerboard production. Beating strengthened the coir pulp. Analyzing the beating revealed that coir pulp was optimized at 1000 to 2000 revolutions, based on a graph of freeness vs. burst index. For all beating conditions (1000 to 8000 revolutions), FESEM micrographs showed the presence of internal and external fibrillation of the fiber, which gradually increased fiber conformability and improved the inter-fiber bonding within the paper formation. Based on its burst strength of 4.57 kPa.m 2 /g and ring crush test of 1.76 Nm 2 /g, which complies with the minimum requirement of the industry standard, coir fiber can be considered an alternative fiber source for linerboard production.

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“…On the other hand, if C = × r s 0 f / , it is possible, applying Napieraian logarithms and considering increments, to state that: [13] This means that the relative variation in the normalized frequency (C) is equal to the relative variation in the airflow resistivity.…”

Section: Airflow Resistancementioning

confidence: 99%

A model for acoustic absorbent materials derived from coconut fiber

Ramis¹,

Tormos²,

Fernández³

et al. 2014

Mater. construcc.

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ABSTRACT:In the present paper, a methodology is proposed for obtaining empirical equations describing the sound absorption characteristics of an absorbing material obtained from natural fibers, specifically from coconut. The method, which was previously applied to other materials, requires performing measurements of airflow resistivity and of acoustic impedance for samples of the material under study. The equations that govern the acoustic behavior of the material are then derived by means of a least-squares fit of the acoustic impedance and of the propagation constant. These results can be useful since they allow the empirically obtained analytical equations to be easily incorporated in prediction and simulation models of acoustic systems for noise control that incorporate the studied materials. RESUMEN:Un modelo para materiales absorbentes acústicos derivados de la fibra de coco. En este trabajo se describe el proceso seguido para obtener ecuaciones empíricas del comportamiento acústico de un material absorbente obtenido a partir de fibras naturales, concretamente el coco. El procedimiento, que ha sido ensayado con éxito en otros materiales, implica la realización de medidas de impedancia y resistencia al flujo de muestras del material bajo estudio. Las ecuaciones que gobiernan el comportamiento desde el punto de vista acústico del material se obtienen a partir del ajuste de ecuaciones de comportamiento de la impedancia acústica y la constante de propagación del material. Los resultados son útiles ya que, al disponer de ecuaciones analíticas obtenidas empíricamente, facilitan la incorporación de estos materiales en predicciones mediante métodos numéricos del comportamiento cuando son instalados formando parte de dispositivos para el control del ruido.

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Development of coconut coir-based lightweight cement board

Cited by 243 publications

References 12 publications

Coir and Sisal Fibers as Fillers in the Production of Eucalyptus Medium Density Particleboards - MDP

Coir and Sisal Fibers as Fillers in the Production of Eucalyptus Medium Density Particleboards - MDP

Linerboard Made from Soda-Anthraquinone (Soda-AQ) Treated Coconut Coir Fiber and Effect of Pulp Beating

A model for acoustic absorbent materials derived from coconut fiber

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