A pilot plant for production of ceiling boards from rice husks

Ajiwe, Vincent Ishmael Egbulefu; Okeke, C.A.; Ekwuozor, S.C.; Uba, I.C.

doi:10.1016/s0960-8524(98)00023-6

Cited by 30 publications

(13 citation statements)

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“…However, particleboards produced with this material have been presenting deficient gluing owing to the lack of direct interaction between this product and commercial adhesives. This behavior was also verified by Ajiwe et al 5 and Melo et al 3 , while assessing particleboards manufactured with different proportions of wood and rice husk particles.…”

Section: Introductionsupporting

confidence: 68%

“…Other researchers, such as Ajiwe et al 5 , Han et al 15 , Lee and Kang 16 , Ndazi et al 4 and Melo et al 3 , also obtained similar results, wherein the rise in the proportion of rice husk in particleboards caused a decrease in resistance and rigidity parameters of these materials. Similarly, the use of rice straw for panel manufacturing, as verified by Hiziroglu et al 11 , also presented results similar to this study.…”

Section: Mechanical Propertiesmentioning

confidence: 56%

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Physical and mechanical properties of particleboard manufactured from wood, bamboo and rice husk

et al. 2014

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In this work, the physical-mechanical properties of particleboards manufactured with wood (Eucalyptus grandis), bamboo (Bambusa vulgaris) and/or rice husk (Oryza sativa) particles, combined or not, were assessed. They were produced in the following proportions: 100% wood; 100% bamboo; 100% rice; 50% wood and 50% bamboo; 50% wood and 50% rice husk. In order to characterize the manufactured particleboards, their physical (density; moisture content; water absorption and thickness swelling) and mechanical properties (static bending; internal bonding and screw withdrawal) were assessed. The results indicated that the use of rice husk caused reduction in particleboard quality. Particleboards manufactured with bamboo showed better quality than those using rice husk as raw material. For most parameters, the particleboards manufactured exclusively with wood particles showed similar performance to bamboo and wood-bamboo particleboards.

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Section: Introductionsupporting

confidence: 68%

Section: Mechanical Propertiesmentioning

confidence: 56%

Physical and mechanical properties of particleboard manufactured from wood, bamboo and rice husk

et al. 2014

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“…Os resultados obtidos tanto para MOR como para o MOE apontaram uma redução com o aumento do percentual de casca. Outros pesquisadores, entre eles, Ajiwe et al (1998), Han et al (1998), Lee e Kang (1998) e Ndazi et al (2006), também obtiveram resultados semelhantes ao deste estudo. Eles também observaram que o aumento da proporção de casca de arroz em painéis proporcionou diminuição dos parâmetros que indicam a resistência e a rigidez desses materiais.…”

Section: Flexão Estáticaunclassified

Propriedades físico-mecânicas de painéis aglomerados produzidos com diferentes proporções de madeira e casca de arroz

Melo¹,

Santini²,

Haselein³

et al. 2009

Ciênc. Florest.

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RESUMONo presente trabalho, avaliaram-se as propriedades físico-mecânicas de painéis aglomerados produzidos com diferentes proporções de madeira (Eucalyptus grandis) e casca de arroz. Para caracterização dos painéis produzidos com os adesivos ureia-formaldeído e tanino-formaldeído, nas proporções 0, 20, 40, 60, 80 e 100% de casca de arroz, determinaram-se as propriedades físicas (massa específica; teor de umidade; absorção de água e inchamento em espessura após 2 e 24 horas de imersão em água), e de resistência mecânica (flexão estática; ligação interna e arrancamento de parafusos). Os resultados obtidos indicaram que o acréscimo da casca de arroz proporcionou uma maior instabilidade e uma menor resistência das chapas. Quando confeccionados utilizando a resina à base de tanino, os painéis apresentaram qualidade superior. Palavras-chave: painéis reconstituídos; casca de arroz; tanino-formaldeído; ureia-formaldeído. ABSTRACTThis work aimed at evaluating the quality of particleboard manufactured with different wood proportions (Eucalyptus grandis) and rice husk. The composites were produced in the proportions 0, 20, 40, 60, 80, and 100% of rice husk with the use of urea-formaldehyde and tannin-formaldehyde adhesives. In order to characterize the quality of the particleboards, physical properties (density; moisture content; water absorption and thickness swelling after 2 and 24 hours of immersion in water) and mechanical properties (static bending; internal bonding and screw withdrawal) were considered. Results showed that increasing rice husk proportion caused larger instability and a decrease in the resistance of particleboards. Particleboards manufactured with tannin-formaldehyde resins presented higher quality when compared to ureaformaldehyde.

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“…The use of Rice husk enables the production of much cheaper ceiling boards. According to Ajiwe et al [12], the classical method of producing particle board involves combining the rice husk sawdust, with the resulting slurry produced by the heating of rice husk with caustic soda. The slurry is then washed with water beaten into pulp, to which sawdust (filler) glue is added formed into sheets in the press then sun dried.…”

Section: Production Of Particleboards Using Classical Methodsmentioning

confidence: 99%