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Use of dry mixing-spraying process for the production of geopolymer-bonded wood and seagrass fibreboards.

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Title: Use of dry mixing-spraying process for the production of geopolymer-bonded wood and seagrass fibreboards.
Authors: Kuqo, Aldi1 (AUTHOR), Koddenberg, Tim1 (AUTHOR), Mai, Carsten1 (AUTHOR) cmai@gwdg.de
Source: Composites: Part B, Engineering. Jan2023, Vol. 248, pN.PAG-N.PAG. 1p.
Subjects: Wood, Manufacturing processes, X-ray computed microtomography, Heat release rates, Binding agents, Geosynthetics, Metal spraying
Abstract: Mixing lignocellulosic fibres with a mineral binder to produce fibreboards is a challenging process due to their large volume per unit mass and their susceptibility to agglomeration (balling effect). The main objective in the dry mixing-spraying process presented in our study is the uniform distribution of the geopolymer binder in the lignocellulosic material. In this work, we compare the properties of two types of composites processed by implementing the abovementioned technique. Geopolymer-bonded fibreboards were produced using up to 50 wt% seagrass or wood fibres. Microscopy and X-ray micro-tomography investigations of the geopolymer composites indicated that their mechanical and physical properties depend on the size of incorporated fibres. Large seagrass fibres were appropriately mixed with the mineral binder matrix forming solid fibreboards that were able to reach the standard requirements for cement boards. More specifically, seagrass-based fibreboards exhibit up to 42% higher bending strength (up to 9.4 MPa) compared to fibreboards composed of wood fibres. In addition, their low thickness swelling and low mean heat release rate in a cone calorimeter (varying from 21.5 to 26.6 kW m−2) indicated a high resistance to water and fire. Considering the resulting properties of the produced fibreboards, the dry-mixing spraying process can be an appropriate technique for producing geopolymer composites containing large amounts of relatively long fibres. [Display omitted] • The dry mixing-spraying process was utilized for the production of fibreboards. • Seagrass and wood fibreboards were investigated, and their properties were compared. • The adequate coverage of fibres with the geopolymer binder affects the properties of the produced composites. • The dry mixing-spraying can be applied to a wide variety of lignocellulosic materials. [ABSTRACT FROM AUTHOR]
Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 160251344
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
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  Data: Use of dry mixing-spraying process for the production of geopolymer-bonded wood and seagrass fibreboards.
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  Data: <searchLink fieldCode="AR" term="%22Kuqo%2C+Aldi%22">Kuqo, Aldi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Koddenberg%2C+Tim%22">Koddenberg, Tim</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mai%2C+Carsten%22">Mai, Carsten</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cmai@gwdg.de</i>
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  Data: <searchLink fieldCode="JN" term="%22Composites%3A+Part+B%2C+Engineering%22">Composites: Part B, Engineering</searchLink>. Jan2023, Vol. 248, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Wood%22">Wood</searchLink><br /><searchLink fieldCode="DE" term="%22Manufacturing+processes%22">Manufacturing processes</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+computed+microtomography%22">X-ray computed microtomography</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+release+rates%22">Heat release rates</searchLink><br /><searchLink fieldCode="DE" term="%22Binding+agents%22">Binding agents</searchLink><br /><searchLink fieldCode="DE" term="%22Geosynthetics%22">Geosynthetics</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+spraying%22">Metal spraying</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Mixing lignocellulosic fibres with a mineral binder to produce fibreboards is a challenging process due to their large volume per unit mass and their susceptibility to agglomeration (balling effect). The main objective in the dry mixing-spraying process presented in our study is the uniform distribution of the geopolymer binder in the lignocellulosic material. In this work, we compare the properties of two types of composites processed by implementing the abovementioned technique. Geopolymer-bonded fibreboards were produced using up to 50 wt% seagrass or wood fibres. Microscopy and X-ray micro-tomography investigations of the geopolymer composites indicated that their mechanical and physical properties depend on the size of incorporated fibres. Large seagrass fibres were appropriately mixed with the mineral binder matrix forming solid fibreboards that were able to reach the standard requirements for cement boards. More specifically, seagrass-based fibreboards exhibit up to 42% higher bending strength (up to 9.4 MPa) compared to fibreboards composed of wood fibres. In addition, their low thickness swelling and low mean heat release rate in a cone calorimeter (varying from 21.5 to 26.6 kW m−2) indicated a high resistance to water and fire. Considering the resulting properties of the produced fibreboards, the dry-mixing spraying process can be an appropriate technique for producing geopolymer composites containing large amounts of relatively long fibres. [Display omitted] • The dry mixing-spraying process was utilized for the production of fibreboards. • Seagrass and wood fibreboards were investigated, and their properties were compared. • The adequate coverage of fibres with the geopolymer binder affects the properties of the produced composites. • The dry mixing-spraying can be applied to a wide variety of lignocellulosic materials. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Composites: Part B, Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.compositesb.2022.110387
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Wood
        Type: general
      – SubjectFull: Manufacturing processes
        Type: general
      – SubjectFull: X-ray computed microtomography
        Type: general
      – SubjectFull: Heat release rates
        Type: general
      – SubjectFull: Binding agents
        Type: general
      – SubjectFull: Geosynthetics
        Type: general
      – SubjectFull: Metal spraying
        Type: general
    Titles:
      – TitleFull: Use of dry mixing-spraying process for the production of geopolymer-bonded wood and seagrass fibreboards.
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            NameFull: Kuqo, Aldi
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            NameFull: Koddenberg, Tim
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            NameFull: Mai, Carsten
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            – D: 01
              M: 01
              Text: Jan2023
              Type: published
              Y: 2023
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              Value: 248
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            – TitleFull: Composites: Part B, Engineering
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