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<p>The artificial cooling of mass concrete during reconstruction is essential for preventing structural cracking due to hydration heat. For tanks and other mass post-tensioned prestressed concrete structures, pre-cooled air can be injected into prestressed rebar pipes to facilitate concrete cooling. This air-pipe cooling method eliminates the need for special cooling pipes embedded within the concrete. Thermos-fluid–solid coupling finite element (FE) models were used to assess the temperature distribution and cracking risk in mass concrete walls. The heat transfer coefficient at the concrete-pipe-air interface and its influence factors were researched in this paper. Multiple cooling strategies have been proposed, and comparative analyses have been conducted to identify the most effective cooling approach.</p>

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Study on air-pipe cooling effect and cooling strategy of mass reinforced concrete wall

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年3月31日

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  • Fei Yan,
  • Zhenyi Luo,
  • Yan Geng,
  • Xiongyan Li

摘要

The artificial cooling of mass concrete during reconstruction is essential for preventing structural cracking due to hydration heat. For tanks and other mass post-tensioned prestressed concrete structures, pre-cooled air can be injected into prestressed rebar pipes to facilitate concrete cooling. This air-pipe cooling method eliminates the need for special cooling pipes embedded within the concrete. Thermos-fluid–solid coupling finite element (FE) models were used to assess the temperature distribution and cracking risk in mass concrete walls. The heat transfer coefficient at the concrete-pipe-air interface and its influence factors were researched in this paper. Multiple cooling strategies have been proposed, and comparative analyses have been conducted to identify the most effective cooling approach.