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This work reports the optimization of a binder for use in low-carbon Thermal Insulation Mortar (TIM) composed of a non-commercial pozzolanic binder and expanded glass beads. A multi-criteria design approach was adopted to optimize the pozzolanic binder in terms of compressive strength (CS) and CO2eq emission (CE). The first step focused on optimizing the formulation of low-carbon pozzolanic binder of TIM, composed of aerial lime (AL), calcined clay (CC) and calcium-based activator (CBA) with mixture design. The second step targeted to lower the environmental impact by reducing TIM paste content by improving early strength development through pozzolanic activators (PA). The impact of these activators on the hydration kinetics was investigated through CS tests and isothermal calorimetry tests. Results from the mixture design show that optimized binder present a 74% increased CS28d compared to the initial binder, while maintaining same constituents. Furthermore, adding 10% sulfate-based activator (SBA) increased the CS7d of the CBA-free optimized binder by 17% compared to the optimized CBA-containing binder, while reducing CE by 32%.

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Multi-criteria Optimization of a Low-Carbon Thermal Insulation Mortar for Sustainable Building Renovation

  • 会议论文

  • 发表日期：

    2026年

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  • T. Feuardent,
  • C. Patapy,
  • G. Samson,
  • B. Binet,
  • M. Cyr

摘要

This work reports the optimization of a binder for use in low-carbon Thermal Insulation Mortar (TIM) composed of a non-commercial pozzolanic binder and expanded glass beads. A multi-criteria design approach was adopted to optimize the pozzolanic binder in terms of compressive strength (CS) and CO2eq emission (CE). The first step focused on optimizing the formulation of low-carbon pozzolanic binder of TIM, composed of aerial lime (AL), calcined clay (CC) and calcium-based activator (CBA) with mixture design. The second step targeted to lower the environmental impact by reducing TIM paste content by improving early strength development through pozzolanic activators (PA). The impact of these activators on the hydration kinetics was investigated through CS tests and isothermal calorimetry tests. Results from the mixture design show that optimized binder present a 74% increased CS28d compared to the initial binder, while maintaining same constituents. Furthermore, adding 10% sulfate-based activator (SBA) increased the CS7d of the CBA-free optimized binder by 17% compared to the optimized CBA-containing binder, while reducing CE by 32%.