Normal-temperature curing type concrete column with superhigh property and construction method thereof

An ultra-high-performance, concrete column technology, applied in construction, building material processing, building construction, etc., can solve problems such as being difficult to apply to practical projects and cannot be implemented on-site, achieving good feasibility, convenient construction, The effect of improving construction efficiency

Active Publication Date: 2019-03-12
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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  • Normal-temperature curing type concrete column with superhigh property and construction method thereof
  • Normal-temperature curing type concrete column with superhigh property and construction method thereof
  • Normal-temperature curing type concrete column with superhigh property and construction method thereof

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 a normal-temperature curing type concrete column with superhigh property and a construction method thereof. The normal-temperature curing type concrete column has the advantages that the technique is feasible, and the construction is convenient and rapid; the concrete can be cured under the normal temperature environment, so as to obtain the concrete with superhigh property; the bearing capacity of the reinforced concrete column is greatly improved, the site construction quality is guaranteed, and the construction efficiency is improved; the autoclave equipment is not required, the construction cost is reduced, and the normal-temperature curing type concrete column is suitable for popularization in actual engineering.

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, The effective use of space in the building is reduced. 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 ​​b...

Claims

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Application Information

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Patent Type & Authority Applications(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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