Effect of press temperature on some properties of cement bonded particleboard

Yel, Hüsnü; Çavdar, Ayfer Dönmez; Torun, Sevda Boran

doi:10.4067/s0718-221x2020005000108

Cited by 11 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, all the boards were resulted in satisfactory thickness swelling level when compared to the standard value of 12.5%. It seems that water absorption (WA) and thickness swelling properties were improved depending on the increasing gypsum ratio by contrast with the decreasing woody content in the mixture (Yel et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Physical, Mechanical and Thermal Properties of Red Pine Wood-Gypsum Particleboard

Kaya

Yalçın

Türker

2021

Bilge International Journal of Science and Technology Research

View full text Add to dashboard Cite

Physical, mechanical and some thermal properties of gypsum -wood mixture particleboards were analyzed for specimens which were prepared in different proportions previously conditioned at 23 ˚C and 65% relative humidity. Water absorbtion (WA) and thickness swelling (TS) properties were measured after being soaked in water for 24 hours. Furthermore, the increment of wood particle was increased the water absobtion values around 28.5 % and 2.1% thickness swelling values, respectively. However, the reduction of gypsum ratio was negatively effected the mechanical resistance of the boards. The highest MOR, MOE and internal bond (IB) values were observed in the C1 code board with 4.73 MPa, 27.04 MPa and 0.97 N/mm 2 respectively. The thermal conductivity of woodgypsum boards were ranged from 0.7404-0.5021 W/mK. The highest density was found in C1 type board as 1.333 kg/m³ and also the highest thermal coductivity was observed a t t h e same sample. Besides, the highest surface temprature which was passed to opposite side of flame source, was found in C5 as 141.7 o C after 300 seconds. However, the lowest value was observed in C1 type board as 93.3 ˚C after 300 seconds.

show abstract

Section: Resultsmentioning

confidence: 99%

Physical, Mechanical and Thermal Properties of Red Pine Wood-Gypsum Particleboard

Kaya

Yalçın

Türker

2021

Bilge International Journal of Science and Technology Research

View full text Add to dashboard Cite

show abstract

“…Also these substances contribute to mineralization process of spruce chips (penetrate to cell structure of wood). Positive effect of curing cementbonded particleboards (with spruce chips) by elevated temperature (40-60 °C) during production is obvious [66]. Therefore, the particleboards were thermally treated at elevated temperature, 45 °C.…”

Section: Methodsmentioning

confidence: 99%

Structural, physical and mechanical changes of cement-bonded particleboards during sudden fluctuations in temperature and moisture

et al. 2022

View full text Add to dashboard Cite

The paper presents research focused on behaviour of cement-bonded particleboards with modified composition during sudden changes of temperature and humidity. Four types of boards were made—one control and three modified ones. Finely ground limestone was used as a modifying component in binder. Secondary wood particles made from crushing cuttings of cement-bonded particleboards were used as chips substituent. Two sets of test specimens (1 set = 6 test specimens) were manufactured. The first set was stored in laboratory conditions. The second set was subjected to 10 cycles of sudden changes of temperature (− 20 °C to + 70 °C) and humidity in accordance with EN 321 (further in the paper referred to as “wet–frost–dry cycle”.) After each cycle, dimensions and mass of the test specimens as well as ultrasonic pulse velocity were determined. A detailed analysis of structural changes in boards during cycling was carried out by an optical microscope. After 10 wet–frost–dry cycles were completed, bending strength and modulus of elasticity in bending were determined. The analysis of test results implies a very good relation between change of ultrasonic pulse velocity and width of cracks in the area of interfacial zone between cement matrix and wood particles. This finding also corresponds with dimensional and volumetric changes of the boards. Dependence of bending strength and modulus of elasticity in bending on composition of boards is apparent. Positive influence of secondary spruce chips on dimensional changes of cement-bonded particleboards caused by sudden changes of temperature and humidity was proved. Finely ground limestone contributes to more resistant structure of boards which leads to improved bending properties. Adverse conditions had more considerable influence on bending strength (decrease by 21% to 26%) than on modulus of elasticity in bending (decrease by 12% to 19%).

show abstract

“…The authors stated that temperature negatively affected the density and TS, and positively affected the FF, WA, MOE, and MOR. Yel et al (2020) evaluated the effect of press temperature (20, 30, 40, 50, 60, 70, and 80 °C) on cement-bonded PB produced with spruce and poplar wood species, and stated that exceeding the 60 °C causes reverse effects on the properties. Ferrandez-Villena et al (2020) evaluated the effects of pressing time (7, 7+7, 15, 15+15 min), pressing cycle (two cycles of 7+7 and 15+15 min), and particle size on the the properties of PB produced using Arundo donax L. The authors stated that mechanical properties are increased with the increase in time.…”

Section: Effects Of Press Type and Parameters Wood Species And Resinmentioning

confidence: 99%

The effects of continuous press speed and conditioning time on the particleboard properties at industrial scale

Çamlibel

Aydın

2021

BioRes

View full text Add to dashboard Cite

Effects of continuous press speed (580 and 600 mm/s) and conditioning time (0 and 72 h) on some physical and mechanical properties and formaldehyde content of particleboards were investigated. The 18 mm thick boards were manufactured using urea-formaldehyde, with a 50% pine, 40% oak wood, and 10% poplar biomass mixture of the wood materials. According to the results of the unconditioned samples, the density, modulus of rupture (MOR), moisture content (MC), thickness swelling (TS), and water absorption (WA) were increased 0.8%, 4.4%, 0.4%, 4.4%, and 5.5% when press speed increased from 580 to 600 mm/s, while thickness, modulus of elasticity (MOE), internal bond (IB), surface soundness (SS), and free formaldehyde (FF) were decreased 0.3%, 4.9%, 2.4%, 10.6%, and 21.1%, respectively. On the contrary to the results of unconditioned samples, MOE and SS were increased 1% and 1.4%, respectively, and WA was decreased 3.5% with the increase in press speed when samples were conditioned for 72 h. Free formaldehyde content was the most prominent parameter influenced by the increase in press speed both for the unconditioned and 72 h conditioned samples.

show abstract

Effect of press temperature on some properties of cement bonded particleboard

Cited by 11 publications

References 17 publications

Physical, Mechanical and Thermal Properties of Red Pine Wood-Gypsum Particleboard

Physical, Mechanical and Thermal Properties of Red Pine Wood-Gypsum Particleboard

Structural, physical and mechanical changes of cement-bonded particleboards during sudden fluctuations in temperature and moisture

The effects of continuous press speed and conditioning time on the particleboard properties at industrial scale

Contact Info

Product

Resources

About