基于水化热抑制剂的大体积混凝土温控技术
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TU528.062

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国家自然科学基金面上项目:温湿循环影响下预应力钢筋混凝土桥梁长期性能多尺度分析方法研究(52078333)


Study on Temperature Control Technology of Mass Concrete Based on Hydration Heat Inhibitors
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    摘要:

    为完善现有大体积混凝土水化温升控制技术,并通过合理应用抑制剂温控措施来降低施工成本,基于水泥水化绝热温升曲线,提出了一种调节绝热温升方程中延迟放热时间的模型,进而控制混凝土掺入不同抑制剂的绝热温升过程。研究结果表明:延迟放热时间为0到3天时,大体积混凝土内部温峰和内表温差呈不断减小的趋势;而在延迟放热时间为5到10天时,由于延迟放热时间的增加,会导致多层浇筑混凝土的热量积蓄;选用延迟放热时间为3天的浇筑混凝土,其温峰与内表温差均能达到温控目标;对于延迟放热时间为1天的浇筑混凝土,若能将入模温度降低1到2℃,也能满足温控要求;本研究所提出的基于水化热抑制剂的混凝土温升调控技术,为大体积混凝土水化热温度场的调控提供了新的思路和方法。

    Abstract:

    To improve the existing temperature field control technology for mass concrete and to apply temperature control measures more effectively using inhibitors while reducing construction cost, a regulating model was proposed. This model is based on an adiabatic temperature rise equation for concrete mixed with inhibitors of different delayed heat release times. The distribution of temperature fields for mass concrete subjected to different temperature control measures involving inhibition was investigated using the model. Specifically, under the working conditions of delayed heat release of zero~three days, the internal temperature peak and temperature difference between the inner and outer surfaces of the mass concrete decrease continuously as the delayed heat release time increases. However, under the working conditions of delayed heat release of five~ten days, heat accumulation in multi-layer poured concrete occurs due to the prolonged delayed heat release time. A three-day inhibition of heat release meets the temperature control objectives, For a one-day inhibition of heat release, the temperature control objectives are achieved by reducing the initial temperature of the concrete in the mold by 1~2℃. In conclusion, this research introduces a new concept and method for regulating the temperature field of mass concrete.

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杨益波,郭智渊,韩炜,等. 基于水化热抑制剂的大体积混凝土温控技术[J]. 科学技术与工程, 2024, 24(19): 8227-8238.
Yang Yibo, Guo Zhiyuan, Han Wei, et al. Study on Temperature Control Technology of Mass Concrete Based on Hydration Heat Inhibitors[J]. Science Technology and Engineering,2024,24(19):8227-8238.

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历史
  • 收稿日期:2023-05-21
  • 最后修改日期:2024-06-14
  • 录用日期:2023-10-26
  • 在线发布日期: 2024-07-18
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