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LCA of Mortar with Calcined Clay and Limestone Filler in RC Column Retrofit

Author

Listed:
  • Brian E. Bautista

    (Department of Civil Engineering, De La Salle University, Manila 0922, Philippines)

  • Jason Maximino C. Ongpeng

    (Department of Civil Engineering, De La Salle University, Manila 0922, Philippines)

  • Luis F. Razon

    (Department of Chemical Engineering, De La Salle University, Manila 0922, Philippines)

Abstract

Cement manufacture contributes about 5–7% of the global carbon dioxide emission. The fastest short-term remedy is to replace parts of ordinary Portland cement (OPC) in concrete with supplementary cementitious materials (SCMs) to reduce CO 2 emissions. Calcined clay and limestone filler have proven to be potential substitutes to good quality SCMs such as fly ash and slag because of their abundance, low cost, and potential reactivity to calcium hydroxide to form calcium silicate hydrates (C-S-H) which are responsible for the strength and other mechanical properties of concrete. A life cycle assessment (LCA) to evaluate the environmental impact of mortar with calcined clay and limestone filler in reinforced concrete (RC) column retrofitting is carried out using data from a multi-purpose complex project in Rizal province in the Philippines. A total of four retrofitting methods are evaluated based on two retrofitting techniques (RC column jacketing and steel jacketing) with two material alternatives (pure OPC-based mortar and mortar with partial replacements). Results show that RC column jacketing using patched mortar with partial replacement of calcined clay and limestone fillers is the least environmentally damaging retrofit option. The use of these SCMs resulted in a 4–7% decrease in global warming potential and a 2–4% decrease in fine particulate matter formation. Meanwhile, RC column jacketing decreased the effect on human carcinogenic toxicity by 75% compared to steel jacketing.

Suggested Citation

  • Brian E. Bautista & Jason Maximino C. Ongpeng & Luis F. Razon, 2022. "LCA of Mortar with Calcined Clay and Limestone Filler in RC Column Retrofit," Sustainability, MDPI, vol. 14(3), pages 1-26, January.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:3:p:1175-:d:729653
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    References listed on IDEAS

    as
    1. Joyeeta Gupta & Courtney Vegelin, 2016. "Sustainable development goals and inclusive development," International Environmental Agreements: Politics, Law and Economics, Springer, vol. 16(3), pages 433-448, June.
    2. Brian E. Bautista & Lessandro E. O. Garciano & Luis F. Lopez, 2021. "Comparative Analysis of Shear Strength Parallel to Fiber of Different Local Bamboo Species in the Philippines," Sustainability, MDPI, vol. 13(15), pages 1-21, July.
    3. Jason Maximino C. Ongpeng & Ernesto J. Guades & Michael Angelo B. Promentilla, 2021. "Cross-Organizational Learning Approach in the Sustainable Use of Fly Ash for Geopolymer in the Philippine Construction Industry," Sustainability, MDPI, vol. 13(5), pages 1-16, February.
    4. Corinna Salzer & Holger Wallbaum & Luis Felipe Lopez & Jean Luc Kouyoumji, 2016. "Sustainability of Social Housing in Asia: A Holistic Multi-Perspective Development Process for Bamboo-Based Construction in the Philippines," Sustainability, MDPI, vol. 8(2), pages 1-26, February.
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