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<p>Utilization of ceramic wastes to fabricate concrete can not only effectively dispose the wastes, but also reduce the energy and source consumptions. Therefore, we fabricated a green ultra high performance concrete using ceramic waste powder (CWP) to replace 55% of cement, and ceramic waste aggregate (CWA) to replace 100% natural quartz sand. However, high content of ceramic wastes will harm the concrete performance including workability and mechanical properties. Therefore, a low-cost and low carbon nano-calcium carbonate (NC) was introduced to compensate for the defects caused by large amounts of CWP and CWA to workability and mechanical behavior. The experimental results show that the workability of ultra high performance concrete with large amounts of CWP and CWA (UHPCLCC) increases by 28.57% with NC content of 5%. Moreover, the flexural strengths, fracture energy, compressive strengths, and compressive toughness of UHPCLCC increase up to 29.6%, 56.5%, 20.4%, and 37.6%, respectively, which is caused by the nano-core effect of NC.</p>

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Mechanical Properties and Mechanisms of Nano-calcium Carbonate-modified Ultra High Performance Concrete with Large Amounts of Ceramic Waste

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Liqing Zhang,
  • Xiyou Li,
  • Luofei Wei,
  • Jingang Xiong,
  • Xinfu Xiong,
  • Yunyang Wang

摘要

Utilization of ceramic wastes to fabricate concrete can not only effectively dispose the wastes, but also reduce the energy and source consumptions. Therefore, we fabricated a green ultra high performance concrete using ceramic waste powder (CWP) to replace 55% of cement, and ceramic waste aggregate (CWA) to replace 100% natural quartz sand. However, high content of ceramic wastes will harm the concrete performance including workability and mechanical properties. Therefore, a low-cost and low carbon nano-calcium carbonate (NC) was introduced to compensate for the defects caused by large amounts of CWP and CWA to workability and mechanical behavior. The experimental results show that the workability of ultra high performance concrete with large amounts of CWP and CWA (UHPCLCC) increases by 28.57% with NC content of 5%. Moreover, the flexural strengths, fracture energy, compressive strengths, and compressive toughness of UHPCLCC increase up to 29.6%, 56.5%, 20.4%, and 37.6%, respectively, which is caused by the nano-core effect of NC.