Environmental optimization of precast concrete beams using fibre reinforced polymers

R.R.L. van Loon, E. Pujadas (Corresponding author), Faas Moonen, Rijk Blok

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Increasing importance is being attached to materials in the life-cycle of a building. In the Netherlands, material life-cycle assessments (LCA) are now mandatory for almost all new buildings, on which basis the building is then awarded a building environmental performance or MPG [Milieuprestatie Gebouwen] score. The objective of this study is to reduce the environmental–economic (shadow) costs of precast reinforced concrete (RC) beams in a conventional Dutch office building, thereby improving its MPG score. Two main optimizations are introduced: first, the amount of concrete is reduced, designing a cavity in the cross-section of the beam; second, part of the reinforcement is replaced with a fibre reinforced polymer (FRP) tube. The structural calculations draw from a combination of several codes and FRP recommendations. Hollow FRP-RC beams (with an elongated oval cavity), and flax, glass, and kenaf fibre tubes yielded the lowest shadow costs. In particular, the flax tube obtained shadow costs that were 39% lower than those of the hollow RC beam (with an elongated oval cavity); which also contributed to decreasing the shadow costs of other building components (e.g., facade), thereby reducing the MPG score of the building. However, this study also shows that it is important to select the right type of FRP as hemp fibre tubes resulted in a 98% increase in shadow costs.
LanguageEnglish
Article number2174
Pages1-12
JournalSustainability
Volume11
Issue numbersu11072174
DOIs
StatePublished - 5 Apr 2019

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Precast concrete
polymer
Fibers
Polymers
Reinforced concrete
costs
reinforced concrete
Flax
Costs
cavity
cost
Life cycle
Kenaf fibers
Hemp fibers
life cycle assessment
new building
Facades
Office buildings
reinforcement
life cycle

Keywords

    Cite this

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    title = "Environmental optimization of precast concrete beams using fibre reinforced polymers",
    abstract = "Increasing importance is being attached to materials in the life-cycle of a building. In the Netherlands, material life-cycle assessments (LCA) are now mandatory for almost all new buildings, on which basis the building is then awarded a building environmental performance or MPG [Milieuprestatie Gebouwen] score. The objective of this study is to reduce the environmental–economic (shadow) costs of precast reinforced concrete (RC) beams in a conventional Dutch office building, thereby improving its MPG score. Two main optimizations are introduced: first, the amount of concrete is reduced, designing a cavity in the cross-section of the beam; second, part of the reinforcement is replaced with a fibre reinforced polymer (FRP) tube. The structural calculations draw from a combination of several codes and FRP recommendations. Hollow FRP-RC beams (with an elongated oval cavity), and flax, glass, and kenaf fibre tubes yielded the lowest shadow costs. In particular, the flax tube obtained shadow costs that were 39{\%} lower than those of the hollow RC beam (with an elongated oval cavity); which also contributed to decreasing the shadow costs of other building components (e.g., facade), thereby reducing the MPG score of the building. However, this study also shows that it is important to select the right type of FRP as hemp fibre tubes resulted in a 98{\%} increase in shadow costs.",
    keywords = "prefabricated precast concrete beams, cross-sectional design, fibre reinforced polymer, MPG score, shadow cost, carbon, glass, flax fibres, kenaf, FRP",
    author = "{van Loon}, R.R.L. and E. Pujadas and Faas Moonen and Rijk Blok",
    year = "2019",
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    Environmental optimization of precast concrete beams using fibre reinforced polymers. / van Loon, R.R.L.; Pujadas, E. (Corresponding author); Moonen, Faas; Blok, Rijk.

    In: Sustainability, Vol. 11, No. su11072174, 2174, 05.04.2019, p. 1-12.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Environmental optimization of precast concrete beams using fibre reinforced polymers

    AU - van Loon,R.R.L.

    AU - Pujadas,E.

    AU - Moonen,Faas

    AU - Blok,Rijk

    PY - 2019/4/5

    Y1 - 2019/4/5

    N2 - Increasing importance is being attached to materials in the life-cycle of a building. In the Netherlands, material life-cycle assessments (LCA) are now mandatory for almost all new buildings, on which basis the building is then awarded a building environmental performance or MPG [Milieuprestatie Gebouwen] score. The objective of this study is to reduce the environmental–economic (shadow) costs of precast reinforced concrete (RC) beams in a conventional Dutch office building, thereby improving its MPG score. Two main optimizations are introduced: first, the amount of concrete is reduced, designing a cavity in the cross-section of the beam; second, part of the reinforcement is replaced with a fibre reinforced polymer (FRP) tube. The structural calculations draw from a combination of several codes and FRP recommendations. Hollow FRP-RC beams (with an elongated oval cavity), and flax, glass, and kenaf fibre tubes yielded the lowest shadow costs. In particular, the flax tube obtained shadow costs that were 39% lower than those of the hollow RC beam (with an elongated oval cavity); which also contributed to decreasing the shadow costs of other building components (e.g., facade), thereby reducing the MPG score of the building. However, this study also shows that it is important to select the right type of FRP as hemp fibre tubes resulted in a 98% increase in shadow costs.

    AB - Increasing importance is being attached to materials in the life-cycle of a building. In the Netherlands, material life-cycle assessments (LCA) are now mandatory for almost all new buildings, on which basis the building is then awarded a building environmental performance or MPG [Milieuprestatie Gebouwen] score. The objective of this study is to reduce the environmental–economic (shadow) costs of precast reinforced concrete (RC) beams in a conventional Dutch office building, thereby improving its MPG score. Two main optimizations are introduced: first, the amount of concrete is reduced, designing a cavity in the cross-section of the beam; second, part of the reinforcement is replaced with a fibre reinforced polymer (FRP) tube. The structural calculations draw from a combination of several codes and FRP recommendations. Hollow FRP-RC beams (with an elongated oval cavity), and flax, glass, and kenaf fibre tubes yielded the lowest shadow costs. In particular, the flax tube obtained shadow costs that were 39% lower than those of the hollow RC beam (with an elongated oval cavity); which also contributed to decreasing the shadow costs of other building components (e.g., facade), thereby reducing the MPG score of the building. However, this study also shows that it is important to select the right type of FRP as hemp fibre tubes resulted in a 98% increase in shadow costs.

    KW - prefabricated precast concrete beams

    KW - cross-sectional design

    KW - fibre reinforced polymer

    KW - MPG score

    KW - shadow cost

    KW - carbon

    KW - glass

    KW - flax fibres

    KW - kenaf

    KW - FRP

    U2 - 10.3390/su11072174

    DO - 10.3390/su11072174

    M3 - Article

    VL - 11

    SP - 1

    EP - 12

    JO - Sustainability

    T2 - Sustainability

    JF - Sustainability

    SN - 2071-1050

    IS - su11072174

    M1 - 2174

    ER -