<p>Engineered cementitious composites (ECC) are the unique material with a high ductility in nature for different applications. However, the high cement dosage in ECC contributes to an elevated carbon footprint, higher costs, and an increased risk of restrained shrinkage cracking, indicating a need for improvements. In recent years, researchers have consistently worked towards developing a more environmentally friendly ECC. These initiatives largely involve the use of more economical and eco-friendly binders, fibers, and other raw materials. This study reviews sustainable ECC incorporating various percentages of limestone calcined clay cement (LC<sup>3</sup>). It discusses the mechanical properties, durability, shrinkage, self-healing ability, hydration, and microstructural performance of LC<sup>3</sup>-ECC with different LC<sup>3</sup> percentages, fibers, water-to-binder ratios, and mix proportions. Based on previous studies, it is evident that LC<sup>3</sup>-ECC exhibits a higher tensile strain capacity, durability properties, and lower compressive strength than conventional ECC (C-ECC). Notably, ECC with 25% to 80% LC<sup>3</sup> exhibited a maximum tensile strain of 4% to 9%, making it appropriate for various structural resilience applications. Additionally, it reduces production costs, CO<sub>2</sub> emissions, and energy consumption compared to C-ECC. Moreover, the early-age hydration is considerably enhanced owing to the higher pozzolanic reaction of LC<sup>3</sup>. Overall, this review provides a comprehensive analysis of influence of LC<sup>3</sup> in ECC for various applications, thereby advancing the research in this area.</p>

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Development of Sustainable Engineered Cementitious Composites Using Limestone Calcined Clay Cement (LC3): A Review

  • N. Shanmugasundaram,
  • P. A. Sivasubramani,
  • S. Praveenkumar,
  • S. Divya

摘要

Engineered cementitious composites (ECC) are the unique material with a high ductility in nature for different applications. However, the high cement dosage in ECC contributes to an elevated carbon footprint, higher costs, and an increased risk of restrained shrinkage cracking, indicating a need for improvements. In recent years, researchers have consistently worked towards developing a more environmentally friendly ECC. These initiatives largely involve the use of more economical and eco-friendly binders, fibers, and other raw materials. This study reviews sustainable ECC incorporating various percentages of limestone calcined clay cement (LC3). It discusses the mechanical properties, durability, shrinkage, self-healing ability, hydration, and microstructural performance of LC3-ECC with different LC3 percentages, fibers, water-to-binder ratios, and mix proportions. Based on previous studies, it is evident that LC3-ECC exhibits a higher tensile strain capacity, durability properties, and lower compressive strength than conventional ECC (C-ECC). Notably, ECC with 25% to 80% LC3 exhibited a maximum tensile strain of 4% to 9%, making it appropriate for various structural resilience applications. Additionally, it reduces production costs, CO2 emissions, and energy consumption compared to C-ECC. Moreover, the early-age hydration is considerably enhanced owing to the higher pozzolanic reaction of LC3. Overall, this review provides a comprehensive analysis of influence of LC3 in ECC for various applications, thereby advancing the research in this area.