Creep deflection of Wood Polymer Composite profiles at demanding conditions

Martien van den Oever*, Karin Molenveld

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Durability and low maintenance make Wood Polymer Composite (WPC) profiles popular in decking applications. EN 15534-4 specifies minimum performance levels to guarantee WPC quality. However, despite such quality specifications, occasionally high temperature creep issues are reported. This paper evaluates the creep performance of three commercial WPC decking profile grades. All three WPC grades meet the requirements specified in EN 15534-4. Nevertheless, at slightly more demanding load conditions, some WPC samples fail around the creep deflection limits specified in the standard, and which are supposed safe. Reference outdoor testing in the moderate climate of the Netherlands shows creep deflection rates which are expected to lead to fatal failure of these WPC samples in a couple of years. It is concluded that predictive testing requires insight in progressive creep strain development relative to fatal failure strain level.

Original languageEnglish
Article numbere00224
JournalCase Studies in Construction Materials
Volume10
DOIs
Publication statusPublished - 1 Jun 2019

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Wood
Polymers
Creep
Composite materials
Testing
Durability
Specifications
Temperature

Keywords

  • Creep
  • Outdoor condition
  • Strain
  • Testing standard
  • Wood polymer composite (WPC)

Cite this

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title = "Creep deflection of Wood Polymer Composite profiles at demanding conditions",
abstract = "Durability and low maintenance make Wood Polymer Composite (WPC) profiles popular in decking applications. EN 15534-4 specifies minimum performance levels to guarantee WPC quality. However, despite such quality specifications, occasionally high temperature creep issues are reported. This paper evaluates the creep performance of three commercial WPC decking profile grades. All three WPC grades meet the requirements specified in EN 15534-4. Nevertheless, at slightly more demanding load conditions, some WPC samples fail around the creep deflection limits specified in the standard, and which are supposed safe. Reference outdoor testing in the moderate climate of the Netherlands shows creep deflection rates which are expected to lead to fatal failure of these WPC samples in a couple of years. It is concluded that predictive testing requires insight in progressive creep strain development relative to fatal failure strain level.",
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Creep deflection of Wood Polymer Composite profiles at demanding conditions. / van den Oever, Martien; Molenveld, Karin.

In: Case Studies in Construction Materials, Vol. 10, e00224, 01.06.2019.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Creep deflection of Wood Polymer Composite profiles at demanding conditions

AU - van den Oever, Martien

AU - Molenveld, Karin

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AB - Durability and low maintenance make Wood Polymer Composite (WPC) profiles popular in decking applications. EN 15534-4 specifies minimum performance levels to guarantee WPC quality. However, despite such quality specifications, occasionally high temperature creep issues are reported. This paper evaluates the creep performance of three commercial WPC decking profile grades. All three WPC grades meet the requirements specified in EN 15534-4. Nevertheless, at slightly more demanding load conditions, some WPC samples fail around the creep deflection limits specified in the standard, and which are supposed safe. Reference outdoor testing in the moderate climate of the Netherlands shows creep deflection rates which are expected to lead to fatal failure of these WPC samples in a couple of years. It is concluded that predictive testing requires insight in progressive creep strain development relative to fatal failure strain level.

KW - Creep

KW - Outdoor condition

KW - Strain

KW - Testing standard

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