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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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含气量对混凝土性能影响的试验研究
, PP. 38-43
Keywords: 道路工程,混凝土,含气量,性能,热传导
Abstract:
针对青藏高原气候特点，对不同含气量的混凝土性能进行研究。对道路混凝土的抗压、抗折、热传导、干缩、温缩、耐磨、抗冻等性能进行了系统的试验研究。结果表明，含气量大约在3%~6%之间时混凝土抗折强度较高，且引气减水剂的掺入可使抗折强度提高15%~20%；导热泵数、热扩散和热传导系数随混凝土的含气量增大而减小，干缩变形则随含气量增加先减小后增大。对于磨损率来说，含气量在4%左右磨损率会突然增大。影响引气混凝土气泡稳定的因素较多，尤其是青藏高原恶劣的气候环境和使用条件，因此青藏高原地区引气混凝土路面施工时应适当加大引气剂的掺量，控制成型混凝土的含气量在设计范围内。综合各项试验结果，认为青藏高原地区修筑引气水泥水泥混凝土路面的适宜含气量应控制在6%±0.5%。
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