孙家瑛　陈志源　吴初航　陈建祥

  着重研究采用硅灰裹石法对于提高混凝土路用性能的影响。研究结果表明：硅灰裹石掺粉煤灰高性能道路混凝土抗折强度比双掺硅灰、粉煤灰高强度混凝土提高20%左右，脆度系数降低30%左右，耐磨性提高15%以上。此外，对硅灰裹石法提高混凝土路用性能的机理进行了探讨。
关键词：硅灰裹石；路用性能；脆度；耐磨性；抗折强度
中图分类号：TU528　　文献标识码：A　　文章编号：1002-3046(1999)04-17

Influence of Silica Fume Coated Aggregate on Properties of Road
Concrete With Adding Flyash

Sun Jiaying
(Shanghai Municipal Engineering Research Institute,Shanghai 200031)
Chen Zhiyuan
(Tongji University,Shanghai 200092 China)
Wu Chuhang
(Shanghai Municipal Engineering Research Institute,Shanghai 200031)
Chen Jianxiang
(Shanghai Municipal Engineering Research Institute,Shanghai 200031)

Abstract：The effect of coating aggregate surface with silica fume on improving the properties of road concrete is researched in this paper.The results show that the flexural strength of road concrete with coating aggregate surface with silica fume enhances 20%,brittleness coefficient decreases 30% and abrasion resistance increases 15% compared with concrete with adding silica fume.It is discussed and analyzed the mechanism of enhancing the properties of road concrete with silica fume coated aggregate.
Key words：silica fume coated aggregate;properties of road concrete;brittleness;abrasion resisttance;flexural strength▲