骨料对混凝土拌合物含气量影响的试验研究

 混凝土的抗冻性在很大程度上与混凝土的含气量有关，而其原料中的骨料是影响含气量的因素之一。通过对混凝土拌合物含气量的试验研究，讨论了骨料对混凝土拌合物含气量的影响。结果表明：骨料对混凝土拌合物含气量的影响主要由骨料性质决定，就试验选定的2个料场骨料而言，其颗粒级配、石粉含量、炭质含量是影响混凝土拌合物含气量的主要因素。可通过控制骨料质量、调整引气剂掺量等措施提高混凝土拌合物含气量，保证混凝土的抗冻性能。 

Influence of Aggregate on Concrete Mix's Air Content

The property of freeze-thaw resistance of concrete depends upon the concrete's air content to a great extent,and the concrete aggregate of raw material is one of factors affecting air content.By the way of tests and studies on air content of concrete mix,the authors discuss the influence of aggregate on concrete mix's air-containing.The result shows as follows: The influence of aggregate on concrete mix's air content is decided by properties of aggregate.To the two aggregates described in this paper,aggregate gradation,powder and charcoal quantities are major factors affecting air-containing of concrete mix.Increasing concrete's air content by controlling aggregate quality and adjusting quantity of air-entraining agent can ensure freeze-thaw resistance of concrete.