Effect of flake geometry on properties of cement-bonded particleboard from mixed tropical hardwoods

Badejo, SO

doi:10.1007/bf00353325

Cited by 40 publications

(30 citation statements)

References 4 publications

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“…This finding is in agreement with the report of Badejo (1988) who worked on improvement in MOE with increase in flake dimensions of hardwood cement composites. Further, Clausen et al (2001) and Li et al (2004) reported that flake geometry has a greater control on stiffness of manufactured flake boards.…”

Section: Effect Of Particle Geometry and Pretreatments On Moesupporting

confidence: 93%

“…These were packaged in a labeled polythene bag to avoid moisture absorption and easy identification. The quantity of water required for the mix was adopted from the procedure outlined by Badejo (1998) as follows: 0.6 Z + (0.3 -R) H Where Z= Weight of cement in the board, R= Moisture Content of the material, H= Weight of wood in the board This was calculated as 432.36ml, which was mixed with wood particles and cement until homogenous slurry was formed. However for chemical pretreatment, a solution of 3% calcium chloride (i.e.…”

Section: Methodsmentioning

confidence: 99%

“…This finding is in agreement with the report of Frybort et al (2008) that the use of long particles is important for high MOR. Badejo (1988) reported improvement in MOR with increase in flake dimensions of hardwood cement composites. Although, the incorporation of large particles has been found to impart greater flexural properties in wood-cement composites, poor interfacial bonding occurring between large particles and cement often results in low strength properties (Adefisan, 2013) and affects composite durability (Kerade et al, 2003).…”

Section: Mechanical Properties Effect Of Particle Geometry and Pretrementioning

confidence: 96%

“…Although, the incorporation of large particles has been found to impact greater flexural properties in wood-cement composites, poor interfacial bonding occurring between large particles and cement often results in low strength properties (Adefisan, 2013) and affects composite durability (Kerade et al, 2003). The effect of different pretreatments on the properties of wood composites has also been investigated (Badejo, 1988 andOlorunnisola, 2008). The objective of this study was to determine the effect of different particle geometry and pretreatments on the strength and sorption properties of wood cement composite boards.…”

Section: Introductionmentioning

confidence: 99%

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

Amiandamhen¹,

Izekor²

2013

JANS

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The effect of particle geometry and pretreatments on the strength and sorption properties of wood particle cement composite boards was investigated. Wood particles (flakes and sawdust) of Gmelina arborea were mixed with cement and water in the production of composite boards. The wood particles were pretreated with hot water, calcium chloride and a combination of both treatments to enhance bonding with cement. The slurry was poured into rectangular moulds for board formation. After demoulding, the boards formed were tested for modulus of rupture (MOR), modulus of elasticity (MOE), water absorption (WA) and thickness swelling (TS). The results revealed that the mean MOR for flakes boards was 3.23N mm -2 while the mean MOR for sawdust boards was 3.01N mm -2 . Hot water and calcium chloride treatment produced the best effect in flake composite boards with MOR and MOE values of 6.90 N/mm 2 and 1897.36 N mm -2 while sawdust composite boards had mean MOR and MOE values of 5.69N mm -2 and 1664.31N mm -2 respectively. The WA rate after 24 hours of flakes and sawdust boards treated with hot water and calcium chloride was 3.63% and 4.28% while the TS rate was 0.69% and 1.44% respectively. Particle geometry and pretreatments significantly improved strength and sorption properties of wood particle cement composite boards (p<0.05).

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Section: Effect Of Particle Geometry and Pretreatments On Moesupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Mechanical Properties Effect Of Particle Geometry and Pretrementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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

Amiandamhen¹,

Izekor²

2013

JANS

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“…Yue et al (2000) observed cracks in the interfacial region of lignocellulosic cement composites. As already proved by Badejo (1988), the use of thicker particles leads to a decrease in panel properties. This decrease in mechanical and dimensional properties can be related to an increased withdrawal of water by the higher volume of the thick strand, as it withdraws comparatively more water from the surrounding matrix than a thinner strand.…”

Section: Discussionmentioning

confidence: 64%

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Frybort¹,

Mauritz²,

Teischinger³

et al. 2012

BioResources

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This study investigates the bonding behaviour of Norway spruce wood strands to a surrounding cement matrix. Effects of wood swelling and shrinking during cement curing were studied by using strands of various thicknesses. The deformation of the spruce wood strands and the surrounding cement matrix, as well as the interface between the wood and the cement were examined using Electronic Laser Speckle Interferometry (ESPI) while applying a pull-out load. Sample deformation was transformed to shear strain maps, showing which side of the strand was tightly bonded to the cement matrix. The analysis of the strain maps proved that all strands were tightly bonded to the cement matrix on only one side. No shear deformation was observed on the loosely bonded side, meaning that there was no adhesion on that side between the wood strand and the cement matrix. Manufacturing of strands results in different surface characteristics and surface roughness. Bringing together the ESPI results with the roughness measurements, it was shown that only the comparably rougher surface adheres to the cement matrix. In a cement bonded composite (CBC) made of lignocellulosics to a greater or lesser extent, only half of the contact area is therefore able to transfer load.

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Particle-Based Materials

et al. 2023

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Effect of flake geometry on properties of cement-bonded particleboard from mixed tropical hardwoods

Cited by 40 publications

References 4 publications

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

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

Investigation of the Mechanical Interactions at the Interface of Wood-Cement Composites by Means of Electronic Speckle Pattern Interferometry

Particle-Based Materials

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