| 熊 鲲,吴小斌,徐少波,田晓川,李顺凯,明 阳.大体积超高性能混凝土温控措施及施工监测[J].水泥工程,2019,32(3):86-89 |
| 大体积超高性能混凝土温控措施及施工监测 |
| Temperature control measures and construction monitoring of large-volume ultra-high performance concrete（UHPC） |
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| DOI： |
| 中文关键词: 大体积超高性能混凝土 低水化热 低收缩 水化温升 |
| 英文关键词: large-volume ultra high performance concrete low hydration heat low shrinkage hydration temperature rise |
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| 中文摘要: |
| 针对襄阳庞公大桥索塔钢混结合段大体积超高性能混凝土（UHPC）的性能要求，采用低水化热低收缩UHPC开展了室内绝热温升试验和大体积模型试验，研究了低水化热低收缩UHPC的水化放热规律。施工过程中采用加碎冰降温和覆盖保温泡沫板的措施，明显降低了UHPC拌和物的入模温度和结构内外温差，大大降低了大体积UHPC的开裂风险，拆模后外观良好无任何裂纹。 |
| 英文摘要: |
| In order to meet the performance requirements for large-volume UHPC in the steel-concrete joint section of the Panggong Bridge in Xiangyang， the adiabatic temperature rise and large volume model tests were studied by low hydration heat UHPC， in order to study the law of hydration heat release. The temperature of UHPC when put into the mold is lowered by adding crushed ice， the internal and external temperature difference of concrete is lowered by covering insulation foam board， so the risk of concrete cracking is reduced greatly. The UHPC have good appearance without any cracks when the mold was taken apart. |
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