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A normal temperature curing ultra-high performance concrete column and its construction method

An ultra-high-performance, concrete column technology, which is applied in the processing of building materials, construction, building construction, etc., can solve problems that cannot be implemented on site and are difficult to apply to actual projects, and achieve convenient construction, good feasibility, The effect of improving the bearing capacity

Active Publication Date: 2021-03-09
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultra-high performance concrete usually requires steam curing, and the requirements for curing conditions are relatively strict. Special autoclaving equipment is required for curing in operation, which is difficult to apply to actual projects, and cannot be implemented on-site

Method used

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  • A normal temperature curing ultra-high performance concrete column and its construction method
  • A normal temperature curing ultra-high performance concrete column and its construction method
  • A normal temperature curing ultra-high performance concrete column and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of normal temperature maintenance ultra-high performance concrete column of this embodiment, its concrete column 1 is made of water, cement, silica fume, quartz powder, polycarboxylate high-efficiency water reducing agent, quartz sand and sodium polyacrylate according to the mass ratio of 0.2: It is prepared by mixing and stirring in the ratio of 1:0.15:0.2:0.009:1.75:0.03. The sodium polyacrylate added in the component can absorb 15 to 30 times the water of its own weight during the concrete mixing process, and provide sufficient hydration water for the concrete in the early stage of curing. The polycarboxylate-based high-performance water reducer of this embodiment is purchased on the market, which can prevent the loss of concrete slump without causing obvious retardation, exert a high plasticizing effect, have a significant effect on concrete reinforcement, and can reduce concrete shrinkage. Endows concrete with excellent construction workability. The concret...

Embodiment 2

[0028] Please check Figure 1~2 , the construction method of a normal temperature maintenance ultra-high performance concrete column of the present embodiment is used for the concrete column maintenance construction of the embodiment 1, comprising the following steps:

[0029] 1) Four wooden formworks are spliced ​​in pairs to form a hollow cuboid wooden mold 2 . After placing the wooden mold vertically, put the bundled longitudinal reinforcement 5 and high-strength stirrup 4 into the wooden mold 2, the longitudinal reinforcement 5 is inserted into the wooden mold 2 along the length direction of the wooden mold 2, and the high-strength stirrup 4 is parallel to It is arranged at intervals in the direction of the cross section of the wooden mold 2; the high-strength stirrups 4 are bundled into a square shape, and the longitudinal steel bars 5 are located inside the four corners surrounded by the high-strength stirrups 4 .

[0030] 2) Mix water, cement, silica fume, quartz powde...

Embodiment 3

[0036] The difference between this embodiment and embodiment 2 is that: said step 1) also includes inserting the shaped steel into the wooden mold 2 along the length direction of the wooden mold 2, the present embodiment adopts H-shaped steel, and the H-shaped steel 6 is located between the high-strength stirrup 4 and The center position surrounded by longitudinal reinforcement 5. The length of the H-shaped steel 6 and the longitudinal reinforcement 5 is the same as that of the wooden mold 2 . Please refer to the attached Figure 3-4 , the outer periphery of the H-shaped steel 6 of this embodiment is covered with concrete, and the longitudinal reinforcement 5 is inserted between the concrete, and the outer periphery of the longitudinal reinforcement 5 is provided with a high-strength stirrup 4, which effectively ensures the bearing capacity of the concrete column 1 and ensures the construction quality on site.

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Abstract

The invention discloses an ultra-high-performance concrete column maintained at normal temperature and a construction method thereof. It has good technical feasibility and is convenient for construction. The concrete can be cured under normal temperature to obtain ultra-high-performance concrete, thereby greatly improving The bearing capacity of reinforced concrete columns not only ensures the quality of on-site construction, but also improves the construction efficiency. Moreover, the present invention does not need to use autoclave equipment, which saves construction costs and is beneficial to popularization in actual projects.

Description

technical field [0001] The invention relates to an ultra-high performance concrete column maintained at normal temperature and a construction method thereof. Background technique [0002] Reinforced concrete structure is the most commonly used structural form in high-rise buildings in my country. In recent years, super high-rise buildings have developed rapidly in our country. Reinforced concrete columns in super high-rise structures bear huge axial force and bending moment, but the strength of concrete currently used in projects is generally low (no more than C80), resulting in huge cross-sectional dimensions of reinforced concrete columns, which increase the structure's self-weight, Reduced the effective use of building space. The compressive strength of ultra-high-performance concrete can reach more than 150MPa, and its application in super high-rise structures can significantly reduce the cross-sectional size of columns, increase the effective use area of ​​buildings, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00E04G21/24
CPCC04B28/00C04B2201/50E04G21/246C04B18/146C04B14/06C04B24/24C04B24/2641C04B32/02
Inventor 胡红松林凡郭子雄王晨
Owner HUAQIAO UNIVERSITY
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