Analysis on Prevent Common Quality Problems of Raw Material and High Performance Concrete Countermeasure of High-speed Railway

2018 ◽  
Author(s):  
Jun GAO ◽  
Xiao LIN
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Performance Concrete ◽  
Raw Material ◽  
High Speed Railway

Durability Research for High-Performance Concrete Box Girder of High Speed Railway

2010 ◽  
Author(s):  
Jun-Qing Lei ◽  
Xin-Hua Zhong ◽  
Wu-Qin Wang
Keyword(s):  
Production Technology ◽  
High Speed ◽  
High Performance ◽  
High Performance Concrete ◽  
Mineral Admixture ◽  
Box Girder ◽  
High Speed Railway ◽  
Creep Properties ◽  
Shrinkage And Creep ◽  
Concrete Box Girder

Now the highspeed railway development is rapid in China. In view of the quality and the features of production technology of railway pre-concrete prefabricated box girder, the experiment researches five kinds of Pumping Concrete, which are composed of different significant slurry. Through researching the Mechanical, conductive, shrinkage and creep properties of specimen, it comes to a conclusion that the main compounding principle of low shrinkage, creep and high-performance concrete of railway box girder is adopting low water and right amount of mineral admixture.

Study on Resistance to Chloride Ion Penetration of High Performance Concrete for High Speed Railway Bridge Pile

2010 ◽  
Vol 150-151 ◽  
pp. 542-546
Author(s):  
Sheng Ai Cui ◽  
Yue Zhong Ye ◽  
Fei Fu ◽  
Zhi Feng Liu
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Performance Concrete ◽  
Chloride Ion ◽  
Chloride Salt ◽  
High Speed Railway ◽  
Chloride Ion Penetration ◽  
Study Results ◽  
Better Than ◽  
Ion Penetration

Taking bridge pile of high speed railway as background, resistance to chloride ion penetration of high performance concrete is studied. Theoretical analysis and experimental research of chloride ion penetration are carried out for double-doped mineral (fly ash and slag powder) concrete, C35 single mineral and preservative double-doped concrete, and C35 two kinds of minerals and preservative composite concrete. In addition, the test results are compared and analyzed. Study results show: chloride ion penetration grade of double-doped mineral concrete (C35, C40, C45 and C50) is very low. Resistances to chloride ion penetration of C35 single mineral and preservative double-doped concrete are all poor overall, so the scheme is infeasible. By performance comparison of resistance to chloride ion penetration, C35 two kinds of minerals and solid preservative composite concrete is obviously better than C35 two kinds of minerals and liquid preservative composite concrete , meanwhile obviously better than C35 double-doped mineral concrete, and very close to C50 double-doped mineral concrete. And, it can meet resistance to chloride ion penetration requirement under the corrosion environments along the high speed railway line and can be used as high performance concrete to resist chloride salt.

scholarly journals Experimental study of the dynamic behaviour of High Performance Concrete (HPC) under tensile loading

2018 ◽  
Vol 183 ◽  
pp. 02043 ◽  
Author(s):  
Bratislav Lukić ◽  
Dominique Saletti ◽  
Pascal Forquin
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Performance Concrete ◽  
Imaging System ◽  
Spall Strength ◽  
High Speed Imaging ◽  
Dynamic Tensile Strength ◽  
Full Field ◽  
Local Point ◽  
Measurement Results

This paper presents the measurement results of the dynamic tensile strength of a High Performance Concrete (HPC) obtained using full-field identification method. An ultra-high speed imaging system and the virtual fields method were used to obtain this information. Furthermore the measurement results were compared with the local point-wise measurement to validate the data pressing. The obtained spall strength was found to be consistently 20% lower than the one obtained when the Novikov formula is used.

Development of Test Rig for High-Speed Railway Rolling Bearings

2011 ◽  
Vol 101-102 ◽  
pp. 702-707 ◽  
Author(s):  
Zhao Dong Huang ◽  
Bo Qian Fan ◽  
Xiao Ping Ouyang ◽  
Ling Ling Xu ◽  
Zhi Gang Wang
Keyword(s):  
High Speed ◽  
High Performance ◽  
Rolling Bearing ◽  
Main Shaft ◽  
Heavy Vehicles ◽  
Test Rig ◽  
Rolling Bearings ◽  
Heavy Load ◽  
High Speed Railway ◽  
Mechanical Structure

The rolling bearing test rig for heavy vehicles often works under heavy load and high speed, thus it requires high performance for the main shaft and mechanical structure. In this paper a design of test rig for high-speed railway rolling bearings is presented, in which a new structure is adopted to reduce the load on the support bearings. The basic idea is to position the load in a way that they can be balanced by each other.

Influence of Different Mechanical Properties to the Concrete Penetration Resistance

2014 ◽  
Vol 982 ◽  
pp. 119-124 ◽  
Author(s):  
Tomáš Vavřiník ◽  
Jan Zatloukal
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
High Speed ◽  
High Performance ◽  
High Performance Concrete ◽  
Penetration Resistance ◽  
Fiber Reinforced Concrete ◽  
Experimental Program ◽  
Fiber Reinforced ◽  
Steel Fiber Reinforced Concrete

This paper describes influence of different mechanical properties to the concrete penetration resistance. The resistance is evaluated on the basis of the presented experimental program. In the experiment, non-deformable ogive-nose projectiles with diameter of 7.92 mm and mass of 8 g with impact velocity of about 700 m/s were hitting center of the specimens. Determination of the concrete penetration resistance was than based on projectile residual velocity obtained from high-speed camera record. The specimens were made from high strength concrete, steel fiber-reinforced concrete, ultra-high performance concrete and ultra-high performance fiber-reinforced concrete with different fiber content. The concrete penetration resistance was evaluated on total 32 specimens. Influence of mechanical properties, addition of coarse aggregate and steel fibers were discussed. Mechanical properties of the tested materials were investigated on total 125 specimens. Data from the measurements were used for creation of new RHT concrete models in Autodyn. In order to confirm experiment's setup and results, numerical analysis was performed in Autodyn. Results of the numerical simulations were compared to the experimental program.

A Development of the Research on High Performance Concrete Incorporated with High Volume Fly Ash

2006 ◽  
Vol 302-303 ◽  
pp. 26-34
Author(s):  
Feng Xing ◽  
Xiang Yong Guo ◽  
Fa Guang Leng ◽  
Ren Yu Zhang
Keyword(s):  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
High Volume ◽  
Raw Material ◽  
Engineering Practice ◽  
Fly Ash Concrete ◽  
Mix Proportion ◽  
High Volume Fly Ash ◽  
And Performance

In this paper, the main characteristic of definition, property, requirement of raw material, mix proportion design and performance improvement of high volume fly ash concrete (for short HVFAC) are summarized. The applications of HVFAC in dam, highway, building and port are introduced. The research results have shown that HVFAC have outstanding properties of physical mechanics, but some problems need to be further studied. It is believed that an operable strict corresponding technical criterion would be set down as soon as possible for engineering practice.

A high-performance copper-based brake pad for high-speed railway trains and its surface substance evolution and wear mechanism at high temperature

Wear ◽  
2020 ◽  
Vol 444-445 ◽  
pp. 203182 ◽  
Author(s):  
Peng Zhang ◽  
Lin Zhang ◽  
Dongbin Wei ◽  
Peifang Wu ◽  
Jingwu Cao ◽  
...  
Keyword(s):  
High Temperature ◽  
Wear Mechanism ◽  
High Speed ◽  
High Performance ◽  
Brake Pad ◽  
High Speed Railway

Maintenance Technologies Research of High Speed Turnout

2011 ◽  
Vol 97-98 ◽  
pp. 114-120 ◽  
Author(s):  
Hao Xu ◽  
Ping Wang ◽  
Dan Liu ◽  
Jin Hui Xu ◽  
Rong Chen
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Technology ◽  
High Speed Railway ◽  
Railway Construction ◽  
Performance Requirements ◽  
Maintenance Work

Turnout, where a train changes its running track, is one of the crucial technologies in China’s high-speed railway construction, turnout is always the important and difficult to maintenance. In order to keep the high technology of turnout and reduce the maintenance work, we based on the experience of accumulated from the design, manufacture and laid technology of high speed turnout, and the scientific maintenance method of high speed turnout was explored. Maintenance of high speed turnout should be in accordance with its high performance requirements and take appropriate measures of maintenance to ensure the high speed turnout working safely.

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