Preliminarily Discuss on the Construction of High Performance Concrete in Passenger Dedicated Railway Line
ZHANG Jin-hua 1，WANG Wei 2
1 .The Fourth Branch Company China Railway Seven Engineering Group Co. Ltd，Wuhan， Hubei 430074，China; 2. The Central South University ， Changsha ， Hunan 410083，China
Abstract：Research purposes: The high performance concrete is widely used in the construction of passenger dedicated railway line. It overcame the performance flaw which was caused by high performance concrete，guaranteed the 100 years service life for passenger dedicated railway line.
Research methods: Based on the practical application of high performance concrete in the Wuhan Tianxingzhou Big Bridge project this paper carried on the high performance proportioning of concrete design，match test and construction control , as so produced the high performance concrete with high durability and strength , slow change and good volume stability.
Research results: In the concrete design of high performance proportioning the gelation material amount should be controlled below 500 kg/m2 .The mixture ratio of water and gelation, the granulated rate, additional substance factor etc. will have the influence on the concrete intensity, mixing, slurry and other different aspects.
Research Conclusions: Choosing the reasonable construction mix ratio and construction control measure to enable the concrete attain densest condition，which was not only helpful to reduce the project cost and enhance the concrete intensity，but also result to make the concrete small interior crevice to resist the external corrosive medium the invasion， protect the steel bar ，greatly enhance the concrete durability ,guarantee the project quality.
张金华,王巍. 浅谈客运专线高性能混凝土施工[J]. 铁道工程学报, 2007, 24(6): 63-67.
ZHANG Jin-hua,WANG Wei. Preliminarily Discuss on the Construction of High Performance Concrete in Passenger Dedicated Railway Line. 铁道工程学报, 2007, 24(6): 63-67.
2007, Vol. 24 
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