乔雨,杨宁,牟荣峰,高小峰,陆兴长,李庆斌

• 1:中国三峡建设管理有限公司
• 2:清华大学水沙科学与水利水电工程国家重点实验室
• 3:浙江工业大学土木工程学院
• 4:昆明理工大学电力工程学院

摘要(Abstract)：

为正确评价乌东德大坝低热水泥混凝土的强度性能,在施工现场分春夏秋冬4次浇筑成型低热水泥全级配和湿筛混凝土试件,开展不同龄期混凝土抗压强度、劈拉强度、轴压强度和弹性模量试验研究。根据试验结果,对低热水泥混凝土强度性能的时变特性及全级配和湿筛混凝土强度性能的换算关系展开分析。结果表明,不同季节低热水泥混凝土的抗压和劈拉强度均达到设计强度;365d龄期混凝土强度性能相较于设计龄期仍有明显增长;低热水泥全级配和湿筛混凝土抗压和劈拉强度的换算关系均服从正态分布,具有95%保证率的换算关系分别为0.68和0.62。实际大坝工程,建议根据分析需要选用平均值或95%保证率的比值作为换算关系。

关键词(KeyWords)： 低热水泥混凝土;全级配;湿筛;强度性能;换算关系

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51839007,51979145);; 中国长江三峡集团有限公司科研项目(BHT/0806,WDD/0427);; 清华大学水沙科学与水利水电工程国家重点实验室开放基金(sklhse-2020-C-04)

作者(Author): 乔雨,杨宁,牟荣峰,高小峰,陆兴长,李庆斌

DOI: 10.13928/j.cnki.wrahe.2021.01.024

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