
1. 中水东北勘测设计研究有限责任公司
2. 水利部寒区工程技术研究中心
Published:2024
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隋伟, 宁逢伟, 肖阳, et al. 流变学参数表征湿喷混凝土工作性研究进展[J]. 2024, (5): 105-110.
隋伟, 宁逢伟, 肖阳, et al. 流变学参数表征湿喷混凝土工作性研究进展[J]. 2024, (5): 105-110. DOI: 10.20040/j.cnki.1000-7709.2024.20231162.
为提高工作性对湿喷混凝土施工性能(可输送性、可喷性)的指导作用,归纳了现有各种技术规范的工作性要求,回顾了流变特性与可喷性相关性研究进展,探讨了流变性能时变机制,总结了时变模型发展现状。结果表明,坍落度无法协调可输送性与可喷性工作性需求矛盾,流变学参数应用效果优于坍落度;屈服剪切应力增加,一次喷射厚度变大,回弹率减小;塑性黏度降低,管道输送压力减小,可输送性变好,但屈服剪切应力、塑性黏度与密实度的相关性尚需深入研究;主流的流变性能时变模型为指数、对数、线性、幂函数等经验公式,应加强有物理意义的模型推导;时变预测模型缺乏有效验证手段,应重点研发速凝体系下湿喷混凝土流变性能的原位评估方法。
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