APPLICATION OF POLYPROPYLENE FIBER IN CONCRETE USED IN HIGH SPEED RAILWAY
Polyethylene fiber is a kind of macromolecule material widely used in every walk of life. In this paper, polyethylene fiber in concrete material used in high speed railway was introduced. Early drying shrinkage characteristic of polyethylene fiber concrete, workability of polyethylene fiber concrete and durability of polyethylene fiber were investigated. Results show that compared to blank concrete, slump of polypropylene fiber concrete decreases, but addition of proper superplasticizer and fly ash can improve polypropylene fiber concrete slump greatly. Polypropylene fiber concrete has the performance of low drying shrinkage. In this paper, different types of polypropylene fiber take on almost the same effects on drying shrinkage. Addition of fly ash takes on unapparent effect on drying shrinkage of polypropylene fiber concrete. For low strength concrete with high w/b, mixed polypropylene fiber into concrete can improve chloride ion attack resistance, but for high strength concrete with low w/c, mixed polypropylene fiber decreases chloride ion attack resistance.
Polypropylene fiber concrete drying shrinkage workability durability
Kun-Lin Ma Zhi-Hua Ou
School of Civil Engineering and Architectutre,Central South University,Changsha 410075,P. R.China Hu Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan Universi
国际会议
长沙
英文
993-997
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）