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Incorporating environmental evaluation and thermal properties of concrete mix designs

Journal Article


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Abstract


  • One of the main challenges in sustainable design of buildings is to improve the energy efficiency of the

    building during its lifetime along with reducing the environmental impact of the design. Recent advances

    in concrete technology offer lower embodied emission through the application of supplementary cementitious

    materials and recycled aggregates. There are also improvements to thermal properties with the

    application of admixtures. However, the relationships between the environmental impact (Cradle to

    Gate) and thermal performance of concrete mix designs have not been researched adequately. The

    Green House Gas (GHG) emissions associated with each individual concrete component and its production

    need to be considered with greater refinement. This study correlates the impacts of selecting a concrete

    mix design in terms of CO2-e with resulting thermal conductivity and density at the design stage of

    buildings. This paper examines 90 concrete mix designs from published literature to identify their

    embodied emissions and thermal conductivity in order to discuss the relationship between low embodied

    carbon dioxide equivalents (CO2-e) emission alternatives and thermal conductivity. The embodied

    CO2-e of a variety concrete mix designs were quantified by compiling embodied CO2-e coefficient for each

    individual component in the concrete. The results show the variation in embodied CO2-e and thermal

    conductivity of concrete mixes. The application of readily available supplementary cementitious material

    can reduce embodied CO2-e (kg CO2-e) by up to 16% in comparison with general practice. Furthermore,

    the thermal conductivity of concrete mix is influenced by changing the density of aggregates and the proportion

    of cementitious materials. In completing this work the results obtained from the study are compared

    with six different inventory databases: ICE (Hammond et al., 2011), Crawford (2011), Alcon (2003),

    eTool (2014), BPIC (2014) and AusLCI (2013). The comparison identifies some inconsistencies in calculation

    of embodied CO2-e across the different databases. This is attributed to variation in embodied CO2-e

    coefficients and lack of in-depth consideration of the detailed properties of each individual concrete mix

    design.

Publication Date


  • 2016

Citation


  • Robati, M., McCarthy, T. J. & Kokogiannakis, G. (2016). Incorporating environmental evaluation and thermal properties of concrete mix designs. Construction and Building Materials, 128 422-435.

Scopus Eid


  • 2-s2.0-84994056585

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7332&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6302

Number Of Pages


  • 13

Start Page


  • 422

End Page


  • 435

Volume


  • 128

Abstract


  • One of the main challenges in sustainable design of buildings is to improve the energy efficiency of the

    building during its lifetime along with reducing the environmental impact of the design. Recent advances

    in concrete technology offer lower embodied emission through the application of supplementary cementitious

    materials and recycled aggregates. There are also improvements to thermal properties with the

    application of admixtures. However, the relationships between the environmental impact (Cradle to

    Gate) and thermal performance of concrete mix designs have not been researched adequately. The

    Green House Gas (GHG) emissions associated with each individual concrete component and its production

    need to be considered with greater refinement. This study correlates the impacts of selecting a concrete

    mix design in terms of CO2-e with resulting thermal conductivity and density at the design stage of

    buildings. This paper examines 90 concrete mix designs from published literature to identify their

    embodied emissions and thermal conductivity in order to discuss the relationship between low embodied

    carbon dioxide equivalents (CO2-e) emission alternatives and thermal conductivity. The embodied

    CO2-e of a variety concrete mix designs were quantified by compiling embodied CO2-e coefficient for each

    individual component in the concrete. The results show the variation in embodied CO2-e and thermal

    conductivity of concrete mixes. The application of readily available supplementary cementitious material

    can reduce embodied CO2-e (kg CO2-e) by up to 16% in comparison with general practice. Furthermore,

    the thermal conductivity of concrete mix is influenced by changing the density of aggregates and the proportion

    of cementitious materials. In completing this work the results obtained from the study are compared

    with six different inventory databases: ICE (Hammond et al., 2011), Crawford (2011), Alcon (2003),

    eTool (2014), BPIC (2014) and AusLCI (2013). The comparison identifies some inconsistencies in calculation

    of embodied CO2-e across the different databases. This is attributed to variation in embodied CO2-e

    coefficients and lack of in-depth consideration of the detailed properties of each individual concrete mix

    design.

Publication Date


  • 2016

Citation


  • Robati, M., McCarthy, T. J. & Kokogiannakis, G. (2016). Incorporating environmental evaluation and thermal properties of concrete mix designs. Construction and Building Materials, 128 422-435.

Scopus Eid


  • 2-s2.0-84994056585

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=7332&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/6302

Number Of Pages


  • 13

Start Page


  • 422

End Page


  • 435

Volume


  • 128