An investigation on the influence of cement binder content on properties of cement-bonded particle board from four tropical hardwoods

Badejo S.O.O., . An investigation on the influence of cement binder content on properties of cement-bonded particle board from four tropical hardwoods. pp. 107-120. ISSN 0302-2935

Laboratory type 12 mm thick cement-bonded particle boards were made from sawmill sawdust of four tropical hardwood species - Mitragyna ciliata Triplochiton scleroxylon Terminalia superba and Ceiba pentandra at eleven cement to wood mixing ratio levels equispaced between 2.0:1.0 and 3.0:1.0. Results showed that the wood species used had strong effect on the three board properties tested. The levels at which the mixing ratio used was also highly significant. Modulus of rupture values ranged from 4.72 to 8.20 N/mm2 for panels made from sawdust of Mitragyna 5.00 to 8.00 N/mm2 for these from Triplochiton 4.35 to 6.05 N/mm2 for those made from Terminalia and 3.75 to2 6.20 N/mm2 for those from Ceiba. Modulus of elasticity ranged from 2 750 to 4 000 N/mm2 2 500 to 3 500 N/mm2 2 500 to 3.400 N/mm2 for those made from Terminalia and 3.75 to 6.20 N/mm2 for those from Ceiba. Modulus of elasticity ranged from 2 750 to 4 000 N/mm2 2 500 to 3 500 N/mm2 2 500 to 3 400 N/mm2 and 2 100 to 3 350 N/mm2 respectively for the four wood species. After proloned soaking in cold water for 72 hous percent thickness swelling ranged from 2.80 percent to 4.5 percent 2.9 percent to 5.5 percent 2.2 percent to 3.55 percent and 4.50 percent to 5.70 percent for the four woods. Moduli of rupture and elasticity properties of the experimental boards appeard to be associated with the densities of the woods used. For these two properties less cement binder content appeared to be needed when forming boards from the low-density Triplochiton and Ceiba hardwoods and more cement binder content when using the medium density Mitragyna and Terminalia hardwoods. Also the medium-density woods produced the most dimensionally stable boards regardless of the mixing ratio level. The most appropriate and economic mixing ratio levels to produce cement-bonded particle boards from the four hardwoods ranged between 2.0:1.0 and 2.4:1.0.

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Abstract

Laboratory type 12 mm thick cement-bonded particle boards were made from sawmill sawdust of four tropical hardwood species - Mitragyna ciliata Triplochiton scleroxylon Terminalia superba and Ceiba pentandra at eleven cement to wood mixing ratio levels equispaced between 2.0:1.0 and 3.0:1.0. Results showed that the wood species used had strong effect on the three board properties tested. The levels at which the mixing ratio used was also highly significant. Modulus of rupture values ranged from 4.72 to 8.20 N/mm2 for panels made from sawdust of Mitragyna 5.00 to 8.00 N/mm2 for these from Triplochiton 4.35 to 6.05 N/mm2 for those made from Terminalia and 3.75 to2 6.20 N/mm2 for those from Ceiba. Modulus of elasticity ranged from 2 750 to 4 000 N/mm2 2 500 to 3 500 N/mm2 2 500 to 3.400 N/mm2 for those made from Terminalia and 3.75 to 6.20 N/mm2 for those from Ceiba. Modulus of elasticity ranged from 2 750 to 4 000 N/mm2 2 500 to 3 500 N/mm2 2 500 to 3 400 N/mm2 and 2 100 to 3 350 N/mm2 respectively for the four wood species. After proloned soaking in cold water for 72 hous percent thickness swelling ranged from 2.80 percent to 4.5 percent 2.9 percent to 5.5 percent 2.2 percent to 3.55 percent and 4.50 percent to 5.70 percent for the four woods. Moduli of rupture and elasticity properties of the experimental boards appeard to be associated with the densities of the woods used. For these two properties less cement binder content appeared to be needed when forming boards from the low-density Triplochiton and Ceiba hardwoods and more cement binder content when using the medium density Mitragyna and Terminalia hardwoods. Also the medium-density woods produced the most dimensionally stable boards regardless of the mixing ratio level. The most appropriate and economic mixing ratio levels to produce cement-bonded particle boards from the four hardwoods ranged between 2.0:1.0 and 2.4:1.0.

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Item Type:	Article
Additional Information:	3 graphs; 5 tables; 13 ref. Summary (En)
AGROVOC Term:	TABLEROS DE PARTICULAS
AGROVOC Term:	TRIPLOCHITON SCLEROXYLON
AGROVOC Term:	TERMINALIA SUPERBA
AGROVOC Term:	CEIBA PENTANDRA/ CEMENTO
AGROVOC Term:	ASERRIN
AGROVOC Term:	ELASTICIDAD
AGROVOC Term:	MADERA
AGROVOC Term:	DENSIDAD
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:55
URI:	http://webagris.upm.edu.my/id/eprint/20156

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