- 李維紅,范金朋,齊 鑫,荀武舉,張 鋮,陳宇紅
2019年第7期
摘要
引用本文
摘 要:系統研究了不同引氣劑摻量及類型對機制砂海工混凝土抗凍性能的影響,并通過氣孔間距試驗、電鏡掃描等試驗方法,分析了凍融環境下不同引氣劑對機制砂海工混凝土的作用機理。試驗結果表明,當ML類引氣劑摻量為0.4%時,機制砂海工混凝土有較好的抗凍性能;醚類引氣劑可進一步改善混凝土的工作性,其引入的微小氣泡可以改善混凝土的包裹性,同時不影響混凝土的抗壓強度;混凝土氣泡間距系數、平均氣孔弦長越小,其抗凍性能越好。
Abstract: The effects of different types and contents of air entraining agents and their dosages on the frost resistance of marine concrete with manufactured sand are systematically studied. The mechanism of action of different air entraining agents on marine concrete with manufactured sand under freeze-thaw environment is analyzed by means of pore spacing tests and SEM. The test results show that: when the content of domestic ether air entraining agent is 0.4%, the marine concrete with manufactured sand has better frost resistance. Ether air-entraining agent can further improve the performance of concrete than rosin air-entraining agent. The micro-bubbles introduced by ether air-entraining agent can improve the encapsulation of concrete without affecting the compressive strength of concrete. The smaller the spacing coefficient of air bubbles and the average chord length of pore, the better the frost resistance of concrete.
李維紅,范金朋,齊鑫,等.引氣劑對機制砂海工混凝土抗凍性能的影響[J].混凝土與水泥制品,2019(7):1-3+8.
LI W H,FAN J P, QI X,et al.The Influence of Air Entraining Agent on Frost Resistance of Marine Concrete with Manufactured Sand[J].China Concrete and Cement Products,2019(7):1-3+8.