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Ductile prestressed concrete structure component and its production method

A concrete structure and prestressing technology, which is applied in the direction of manufacturing tools, building structures, ceramic molding machines, etc., can solve the problems of high-performance concrete quality environmental factors, reduced concrete ductility, poor ductility, etc., to increase ductility, improve The ultimate bearing capacity and the effect of improving the earthquake resistance

Inactive Publication Date: 2003-02-05
王用中 +3
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Problems solved by technology

[0005] Disadvantages of high-performance concrete: first of all, there are strict requirements on various raw materials, and the quality of high-performance concrete is particularly susceptible to environmental factors in the process of production, transportation, pouring and maintenance
In terms of material performance, the disadvantage of high-strength concrete is that its ductility is worse than that of ordinary-strength concrete, and the ductility of plain concrete decreases as the strength increases.

Method used

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  • Ductile prestressed concrete structure component and its production method
  • Ductile prestressed concrete structure component and its production method
  • Ductile prestressed concrete structure component and its production method

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specific Embodiment approach

[0037] Specific implementation method: a new type of prestressed concrete structure, including concrete and prestressed tendons, the compressive strength of the concrete is greater than 60MPa, the prestressed tendons are prestressed steel strands, the strength is ≥ 1860MPa, and the relaxation rate is ≤ 2.5%, elongation ≥ 5%, and the flexural ductility ratio of the prestressed concrete structure conforming to the above process parameters is greater than 3.0. The manufacturing steps of described novel prestressed concrete structure are as follows: (1) formwork is laid (2) reinforced skeleton is set (3) concrete pouring strength is greater than 60mpa (4) strength is greater than 1860MPa, relaxation rate ≤ 2.5%, elongation ≥ 5% steel strands with high uniform elongation are in place, tensioned (5) the concrete is covered with sacks and watered for curing, when the strength of the concrete cube reaches the design required strength, the tensioned (post-tensioned) or pre-tensioned met...

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Abstract

The present invention discloses a ductile prestressed concrete structural member and its production method. Said member includes concrete and prestressed reinforcement, the described concrete compression strength is greater than 60MPa, and the described prestressed reinforcement is prestressed stranded wire, its strength is greater than or equal to 1860 MPa, its relaxation rate is less than or equal to 2.5% and percentage elongation is greater than or equal to 5%. The bending deflection ductility ratio of the prestressed concrete structure meeting the above-mentioned technological parameters is greater than 3.0, and said prestressed concrete structure is superior to general concrete structure in ductility.

Description

Technical field: [0001] The invention relates to a prestressed concrete structure technology, which mainly utilizes the combination of high-performance concrete and high elongation steel strands to obtain prestressed concrete structural components with a bending deflection coefficient of more than 3.0, so that the ductility of the prestressed concrete structure is improved. better than ordinary concrete structures. The invention also relates to a manufacturing method of the prestressed concrete structural component. Background technique: [0002] With the in-depth development of scientific research on concrete materials, conventional cement and sand are used as raw materials, and conventional production processes are used, mainly relying on the addition of high-efficiency water reducers or a certain amount of active mineral materials at the same time, so that the mixture has good performance. The cement concrete with high performance and high performance after hardening has ...

Claims

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Application Information

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IPC IPC(8): B28B1/14E01D1/00E04B1/06E04B1/22
Inventor 王用中赵顺波王健赵卓
Owner 王用中
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