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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU142729" target="_blank" >RIV/00216305:26110/22:PU142729 - isvavai.cz</a>

Result on the web

<a href="https://jwoodscience.springeropen.com/articles/10.1186/s10086-021-02004-3" target="_blank" >https://jwoodscience.springeropen.com/articles/10.1186/s10086-021-02004-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s10086-021-02004-3" target="_blank" >10.1186/s10086-021-02004-3</a>

Result language

angličtina

Original language name

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

Original language description

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%).

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF WOOD SCIENCE

ISSN

1435-0211

e-ISSN

1611-4663

Volume of the periodical

68

Issue of the periodical within the volume

1

Country of publishing house

JP - JAPAN

Number of pages

22

Pages from-to

1-22

UT code for WoS article

000738607500001

EID of the result in the Scopus database

2-s2.0-85122288700