董 军1,翁兴中2,颜祥程2
机场道面施工对引气混凝土气泡特征参数的影响
董 军1,翁兴中2,颜祥程2
摘 要:为研究机场道面施工工艺和引气剂品种对混凝土气泡特征参数的影响规律,采用4种国内常用的引气剂配置了含气量为6%的机场水泥混凝土。试验结果表明,经排式振捣机振捣后,混凝土的含气量大幅度降低,气泡总数和小孔径气泡个数显著增加;掺不同品种引气剂的混凝土经机场道面施工后,其气泡特征参数有较大的差异;优质引气剂经施工后在混凝土中形成大量小孔径气泡,气泡间距系数明显降低。
Abstract: In order to study the effect of airport pavement concrete construction and air entraining agent on air void characteristic parameters, four types of air entraining agent which are frequently used in China are adopted, and the airport cement concrete with air content of 6% is tested. The results show that air content in concrete decreases greatly while the total air number and the tiny air void number increase remarkably after HPZ vibration. Concrete with different air entraining agent lead to quite different air void characteristic parameters after airport concrete construction. Air void spacing factor decreases greatly after HPZ vibration and lots of tiny air voids are entrained in concrete with good quality air entraining agent.
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