Investigation of local degradation in wood stands and its effect on cement wood composites

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Abstract

Wood-wool cement boards (WWCB) are a type of cement/fibre composite using wood strands as reinforcement. When lignocellulosic materials such as wood are mixed with cement, polysaccharides can leach out and negatively affect the cement hydration. Thus, the WWCB industry has to face those problems, which can cause significant problems during the manufacturing process. This study aims to identify the parameters that can influence the quality of wood and thus the WWCB. The investigation focuses on the potential differences between these two wood samples, by analysing the cement/wood compatibility, the mechanical properties of the wood strands, the microstructure and the chemical composition of the leachates. Two similar spruce wood samples, which have been grown and harvested under the same conditions are compared to each other. When mixed with cement, one sample performed up to expectation in WWCB whereas the second one shows chemical and mechanical problems, resulting in weak WWCBs that cannot fulfil the standards. A comparison two wood samples shows not only different properties of WWCB. Cement-fibre compatibility for one of the sample is below the limit to be used in composite and tensile strength shows a similar behaviour.
LanguageEnglish
Article number117201
Number of pages7
JournalConstruction and Building Materials
Volume231
DOIs
StatePublished - 20 Jan 2020

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Wood
Cements
Degradation
Composite materials
Wool
Fibers
Polysaccharides
Hydration
Reinforcement
Tensile strength
Mechanical properties
Microstructure

Keywords

  • Wood-wool cement boards
  • Leachates
  • SEM
  • Calorimetry
  • Cement-fibre compatibility

Cite this

@article{b0ecbed6f2564780a5d1d875886baa0e,
title = "Investigation of local degradation in wood stands and its effect on cement wood composites",
abstract = "Wood-wool cement boards (WWCB) are a type of cement/fibre composite using wood strands as reinforcement. When lignocellulosic materials such as wood are mixed with cement, polysaccharides can leach out and negatively affect the cement hydration. Thus, the WWCB industry has to face those problems, which can cause significant problems during the manufacturing process. This study aims to identify the parameters that can influence the quality of wood and thus the WWCB. The investigation focuses on the potential differences between these two wood samples, by analysing the cement/wood compatibility, the mechanical properties of the wood strands, the microstructure and the chemical composition of the leachates. Two similar spruce wood samples, which have been grown and harvested under the same conditions are compared to each other. When mixed with cement, one sample performed up to expectation in WWCB whereas the second one shows chemical and mechanical problems, resulting in weak WWCBs that cannot fulfil the standards. A comparison two wood samples shows not only different properties of WWCB. Cement-fibre compatibility for one of the sample is below the limit to be used in composite and tensile strength shows a similar behaviour.",
keywords = "Wood-wool cement boards, Leachates, SEM, Calorimetry, Cement-fibre compatibility",
author = "Katerina Kochova and Veronica Caprai and Florent Gauvin and Katrin Schollbach and H.J.H. Brouwers",
year = "2020",
month = "1",
day = "20",
doi = "10.1016/j.conbuildmat.2019.117201",
language = "English",
volume = "231",
journal = "Construction and Building Materials",
issn = "0950-0618",
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}

TY - JOUR

T1 - Investigation of local degradation in wood stands and its effect on cement wood composites

AU - Kochova,Katerina

AU - Caprai,Veronica

AU - Gauvin,Florent

AU - Schollbach,Katrin

AU - Brouwers,H.J.H.

PY - 2020/1/20

Y1 - 2020/1/20

N2 - Wood-wool cement boards (WWCB) are a type of cement/fibre composite using wood strands as reinforcement. When lignocellulosic materials such as wood are mixed with cement, polysaccharides can leach out and negatively affect the cement hydration. Thus, the WWCB industry has to face those problems, which can cause significant problems during the manufacturing process. This study aims to identify the parameters that can influence the quality of wood and thus the WWCB. The investigation focuses on the potential differences between these two wood samples, by analysing the cement/wood compatibility, the mechanical properties of the wood strands, the microstructure and the chemical composition of the leachates. Two similar spruce wood samples, which have been grown and harvested under the same conditions are compared to each other. When mixed with cement, one sample performed up to expectation in WWCB whereas the second one shows chemical and mechanical problems, resulting in weak WWCBs that cannot fulfil the standards. A comparison two wood samples shows not only different properties of WWCB. Cement-fibre compatibility for one of the sample is below the limit to be used in composite and tensile strength shows a similar behaviour.

AB - Wood-wool cement boards (WWCB) are a type of cement/fibre composite using wood strands as reinforcement. When lignocellulosic materials such as wood are mixed with cement, polysaccharides can leach out and negatively affect the cement hydration. Thus, the WWCB industry has to face those problems, which can cause significant problems during the manufacturing process. This study aims to identify the parameters that can influence the quality of wood and thus the WWCB. The investigation focuses on the potential differences between these two wood samples, by analysing the cement/wood compatibility, the mechanical properties of the wood strands, the microstructure and the chemical composition of the leachates. Two similar spruce wood samples, which have been grown and harvested under the same conditions are compared to each other. When mixed with cement, one sample performed up to expectation in WWCB whereas the second one shows chemical and mechanical problems, resulting in weak WWCBs that cannot fulfil the standards. A comparison two wood samples shows not only different properties of WWCB. Cement-fibre compatibility for one of the sample is below the limit to be used in composite and tensile strength shows a similar behaviour.

KW - Wood-wool cement boards

KW - Leachates

KW - SEM

KW - Calorimetry

KW - Cement-fibre compatibility

U2 - 10.1016/j.conbuildmat.2019.117201

DO - 10.1016/j.conbuildmat.2019.117201

M3 - Article

VL - 231

JO - Construction and Building Materials

T2 - Construction and Building Materials

JF - Construction and Building Materials

SN - 0950-0618

M1 - 117201

ER -