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标题：Study On Properties Of High Strength Silica Fume Concrete Withpolypropylene Fibre
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作者：R.Karthi ; Dr. P. Chandrasekaran
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
期号：TAPSA
页码：85
出版社：S&S Publications
摘要：Now a day’s high strength and high performance concrete are being widely used all over the world.Most applications of high strength concrete have been in high rise buildings, long span bridges and in some specialapplications in structures. In developed countries, using high strength concrete in structures today would result inboth technical and economic advantage. In high strength concrete, it is necessary to reduce the water/cement ratioand which in general increases the cement content. To overcome low workability problem, different kinds ofmineral admixtures (fly ash, rice husk ash, silica fume etc.) and chemical admixtures are used to achieve therequired workability. In the present experimental investigation, the mechanical properties of high-strength concreteof grades M60, at 28 days characteristic strength with different replacement levels of cement with silica fume areconsidered. Standard cubes (150mm x 150mm x 150mm), standard cylinders (150mm dia x 300mm height) andstandard prisms (100mm x 100mm x500mm) were considered in the investigation. all specimens were cast with andwithout polypropylene fiber. The mechanical properties viz., compressive strength, flexural strength and split tensilestrength, of high strength concrete with various replacement of polypropylene fiber 0.5%, 1%, 1.5% and 2% andsilica fume viz., 10%, 20%, and 30% , has been considered. The study revealed that the use of waste material likesilica fume improved the mechanical properties of high strength concrete, which is otherwise hazardous to theenvironment and thus may be used as a partial replacement of cement.
关键词：polypropylene fibre; silica fume