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摘要:
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根据润扬长江公路大桥南锚碇基础冷冻法施工特点,研究了负温混凝土的强度、应力-应变等性能特性。结果表明,通过选择合适的防冻剂,优化混凝土配合比,能保证负温混凝土具有抵抗冻害的能力并在负温条件下强度持续增长,转正温后混凝土各项物理力学性能不降低。
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Performance of Negative-Temperature-Concrete(NTC), including strength and stress-strain, were studied in accordance with the characteristics of freezing method in the south anchor of Runyang Yangtse River Bridge. The results show that, by selecting the appropriate antifreezing agent and optimizing the mix proportion, NTC is capable of frost-resistance, and the strength of NTC can increase continually under negative temperature and the mechanical properties of NTC will not decrease after the temperature rises above zero.
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作者简介:
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参考文献:
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[1] JGJ104-97,建筑工程冬期施工技术规程[S].
[2] 朱卫中,丁淑芬.负温混凝土中心质界面上冷冻水的破坏作用探讨[J].混凝土,1995,(1).
[3] 朱卫中,王剑.负温高强混凝土抗冻临界强度试验[A].第三届全国高强与高性能混凝土及其应用学术会议论文集[C].1998.
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