Wyniki wyszukiwania - BazTech

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Roasted coffee waste as a substitute of wood chips in particleboards

Dukarska D., Myszka Sz., Andrearczyk A., Ogrodowska E., Grzana M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2018

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No. 104

43--47

EN

The paper presents preliminary results of our studies on possible use of roasted coffee waste in the form of husks as a substitute for wood chips in three-ply particleboards glued with melamine-formaldehyde resin (MUF). We produced boards in which roasted coffee waste substituted up to 50% of wood chips. Increasing share of coffee waste caused a gradual decrease in the board bending strength and internal bond. However, strength of the boards containing even 50% of coffee waste was typical of P2 boards, i.e., those intended for interior decoration, including furniture used in dry conditions.

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White mustard straw as an alternative raw material in the manufacture of particleboards resinated with different amount of urea formaldehyde resin

Dukarska D., Bartkowiak M., Stachowiak–Wencek A.

Drewno : prace naukowe, doniesienia, komunikaty

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2015

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vol. 58, nr 194

49--63

EN

In this work the optimum resination rate of white mustard straw particles with UF resin in the production of straw particleboards was investigated. The resination rates used in this study were 10, 12 and 14%. For the selected resination rate, the possibility of reducing the density of the straw particleboards was also determined. In order to evaluate the hygienic parameters of the experimental boards, the formaldehyde content and volatile organic compounds (VOC) were determined. Moreover, using a thermogravimetric analysis (TGA) the boards’ disposal options by means of burning or co-incineration were investigated. The study results showed that a 10% resination rate enabled the production of white mustard particleboards of type P1 and P2, while the simultaneous reduction in their density to 600 kg/m3 limited their application to dry conditions only, i.e. boards of P1 type. Thermogravimetric analysis revealed a variable thermal performance of the studied boards. The pine particleboards showed a higher thermal resistance, however, up to a temperature of 750°C, the samples of the experimental boards underwent a similar process of thermal destruction.

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Non-normative method for determining acoustic insulation of board materials

Dukarska D., Kusiak M., Derkowski A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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No. 88

56--60

EN

Non-normative method for determining acoustic insulation of board materials. The paper presents a new method for the measurement of acoustic insulation against airborne sounds in the insulation and construction board materials used in wooden and brick buildings. The primary aim of the study was to simplify the design of a test stand, and thus of individual measurements, while maintaining the confidence level of the results. A series of measurements was performed to evaluate this method’s suitability for determining the acoustic insulation of board materials, and the resulting sound reduction index was analyzed with reference to the tested material and frequency of the generated sound. The study outcomes were found to be consistent with the principles of building acoustics and allowed for drawing preliminary conclusions on the insulating properties of various board materials and sets of materials used for the construction of building partitions.