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<p>Effective low-carbon nanomodified rapid-hardening high-performance concretes (HPC) are developed. It is shown that the introduction of complex nanomodifiers based on polycarboxylate ethers with nanodesigned chains and nanosized particles of C–S–H calcium hydrosilicates makes it possible to improve the cementitious matrix and the interfacial transition zone. To ensure a&#xa0;high packing density of the aggregates, the granulometric composition curve is optimized, which provides increased workability and homogeneity of the concrete mixture. It is established that the alkaline activation of high-quality Portland cement CEM II/А‑S 52.5 R and high-aluminate fly ash accelerates the kinetics of concrete hardening. Nanomodified HPCs with a&#xa0;48% reduced carbon footprint, characterized by increased early and standard strength, high density, and improved technical properties, are obtained.</p>

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Low-carbon nanomodified rapid-hardening high-performance concretes

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • M. A. Sanytsky,
  • B. G. Rusyn,
  • T. S. Kropyvnytskyi,
  • R. Yu. Trefler

摘要

Effective low-carbon nanomodified rapid-hardening high-performance concretes (HPC) are developed. It is shown that the introduction of complex nanomodifiers based on polycarboxylate ethers with nanodesigned chains and nanosized particles of C–S–H calcium hydrosilicates makes it possible to improve the cementitious matrix and the interfacial transition zone. To ensure a high packing density of the aggregates, the granulometric composition curve is optimized, which provides increased workability and homogeneity of the concrete mixture. It is established that the alkaline activation of high-quality Portland cement CEM II/А‑S 52.5 R and high-aluminate fly ash accelerates the kinetics of concrete hardening. Nanomodified HPCs with a 48% reduced carbon footprint, characterized by increased early and standard strength, high density, and improved technical properties, are obtained.