Papers by Keyword: Water Tightness

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Authors: Zhao Dong Huang, Bo Qian Fan, Xiao Ping Ouyang, Ling Ling Xu, Zhi Gang Wang
Abstract: 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.
Authors: Vladimír Suchánek, Matěj Slováček
Abstract: This report deals with the description of development of waterproof steel fibre reinforced concrete (suitable for concrete lining of tunnel constructions in particular) in cooperation with the concrete supplier. With regard to newly released documents, two formulas of waterproof concrete supplemented with steel and polypropylene fibres were suggested. The formulas were designed according to different approaches (standards / Austrian Directive), and they differ only in various weight doses of the individual components. With regard to the general requirements for the tunnel lining (fire resistance tests, chemical stability, strength, impermeability and adhesion), strength and plastic properties, durability parameters (depth of penetration of water under pressure, depth of penetration of standing water, frost resistance, resistance of cement concrete surface to water and defrosting chemicals, depth of penetration of chloride) and the resistance to extreme thermal stress were determined in both the formulas. Standardized tests and non-standard testing have been completed.
Authors: Anatoly A. Mishedchenko, Aleksandra V. Kuzina
Abstract: In the present paper were reviewed causes of loss of tightness of horizontal joints of tubing column, were calculated parameters of expansion clearance of tubing lining, were summarized remedy ways of emergency situations during joint sealing.
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