Self-repairing concrete, prefabricated embedded column core concrete composite column and preparation method

A concrete and self-healing technology, applied in the field of composite columns, can solve the problems of insufficient compressive bearing capacity of composite columns, inconvenient construction of composite injection molding, weak self-repairing ability, etc., and achieve concrete with enhanced self-healing efficiency and microbial self-repair The effect of good structural performance and high proportion of pores

Inactive Publication Date: 2020-10-02
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the technical problems of insufficient compressive bearing capacity, weak self-repair ability, and low service life of ordinary concrete composite columns; solves the inconvenient construction of existing composite injection molding

Method used

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  • Self-repairing concrete, prefabricated embedded column core concrete composite column and preparation method
  • Self-repairing concrete, prefabricated embedded column core concrete composite column and preparation method
  • Self-repairing concrete, prefabricated embedded column core concrete composite column and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a kind of self-repairing concrete, and self-repairing concrete is microbial self-repairing concrete, and described microbial self-repairing concrete is calculated by volume percentage, is made up of concrete batching, regenerated coarse aggregate carrier and Bacillus pasteurian bacteria liquid; Wherein The volume ratio of the bacterial liquid is converted from the water density value to the mass ratio; the volume ratio of other components is converted to the mass ratio and weighed;

[0049] The volume dosage of the regenerated coarse aggregate carrier is 8% to 12% of the total volume of the microbial self-repairing concrete, and the volume dosage of the Bacillus pasteurian bacteria solution is 30% of the total volume of the microbial self-repairing concrete;

[0050] The concrete batching is composed of sand, stone, cement and water by volume percentage, sand: stone: cement: water=(3.10~3.30):(1.55~1.80):(1.00~1.25):(0.50~0.65 );

[0051] The O...

Embodiment 2

[0077] Same as embodiment 1, the difference from embodiment 1 is that this embodiment provides the setting method of the self-repairing concrete part 1 of the concrete composite column subjected to eccentric compressive stress.

[0078] Composite columns appear as Figure 5 The cracking form shown in (b) is specially adopted for its cracking form as follows Figure 6 In the pouring method shown in the shaded part in (b), the distances from the central axis of the circular steel pipe 3 to the two opposite surfaces of the composite column are 77-83mm and 217-223mm respectively, and the distances from the other two opposite surfaces of the composite column are equal 150mm. Microbial self-healing concrete was poured on the eccentrically compressed part of the composite column and on the side where transverse cracks appeared. After loading to 1000KN, a large number of cracks have appeared in the concrete. The width of the cracks measured by the crack observer is approximately 0....

Embodiment 3

[0083] Same as embodiment 1, the difference from embodiment 1 is that this embodiment provides the setting method of the self-repairing concrete part 1 of the concrete composite column under the loading mode of horizontal load.

[0084] Composite columns appear as Figure 5 The cracking form shown in (c) is specially adopted for its cracking form as follows Figure 6 The pouring method shown in the shaded part in (c) is that microbial concrete is poured on the side that does not directly bear the horizontal load, the outer wall of the circular steel pipe 3 fits with the center of the plane on the side where the longitudinal reinforcement is poured, and the center-axisbase composite column of the circular steel pipe 3 The distance from the surface is 227-233mm, and the distance from the other two opposite surfaces of the combined column is 150mm. When the horizontal load was increased to 400KN, a large number of oblique cracks appeared in the concrete, and the crack width was...

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Abstract

The invention discloses self-repairing concrete, a prefabricated embedded column core concrete composite column and a preparation method. The self-repairing concrete is microbial self-repairing concrete, which comprises, by volume percentage: concrete batching, a recycled coarse aggregate carrier and a Bacillus pasteurii bacteria solution; and the volume mixing amount of the recycled coarse aggregate carrier is 8%-12% of the total volume of the microbial self-repairing concrete, and the volume mixing amount of the Bacillus pasteurii bacteria solution is 30% of the total volume of the microbialself-repairing concrete. According to the invention, the prefabricated embedded column core concrete composite column adopts the microbial self-healing concrete for pouring specific parts, which canspecifically strengthen cracked parts of the concrete composite column, so that the using performance of the concrete composite column is improved; and a crack can be automatically repaired, and the service life is prolonged.

Description

technical field [0001] The invention relates to a composite column in construction engineering, to self-repairing concrete, a prefabricated concrete composite column with an embedded column core and a preparation method thereof, in particular to a self-repairing concrete and a preparation method thereof, as well as to a prefabricated concrete composite column with an embedded column core and its preparation method. Preparation. Background technique [0002] Concrete composite columns are the most basic load-bearing components in various engineering structures such as houses, bridges, and hydraulic engineering. They are often used as pillars for floors, bridge piers, foundation columns, towers, and trusses. They are widely used. Concrete is used It is widely used in the construction industry, and natural resources such as sand and gravel are consumed in large quantities. Due to the demolition and reconstruction of urban buildings, a large amount of construction waste will be ...

Claims

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Application Information

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IPC IPC(8): E04C3/34C04B28/00
CPCC04B28/00E04C3/34C04B14/02C04B14/06C04B18/16C04B2103/0001
Inventor 刘超余伟航吕振源刘化威朱超
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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