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Self-repairing concrete and recycled aggregate assembled reinforced concrete coupling beam, and preparation methods thereof

A technology of reinforced concrete and recycled aggregates, applied in joists, girders, trusses, etc., can solve the problems of low strength, poor seismic performance, weak repair ability, etc., and achieve strong seismic performance, easy operation, and recycling of construction waste. Effect

Inactive Publication Date: 2020-08-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual engineering at present, the failure mode of the coupling beam is a brittle shear failure mode, and serious crossing oblique cracks are formed in the mid-span of the coupling beam, which has technical problems such as weak repair ability, low strength, and poor seismic performance.

Method used

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  • Self-repairing concrete and recycled aggregate assembled reinforced concrete coupling beam, and preparation methods thereof
  • Self-repairing concrete and recycled aggregate assembled reinforced concrete coupling beam, and preparation methods thereof
  • Self-repairing concrete and recycled aggregate assembled reinforced concrete coupling beam, and preparation methods thereof

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Embodiment 1

[0049] This embodiment provides a kind of self-repairing concrete, and the self-repairing concrete is microbial self-repairing concrete, and the microbial self-repairing concrete is calculated by volume percentage, and is composed of concrete ingredients, recycled aggregate and Bacillus pasteurian bacteria liquid; wherein the bacteria liquid volume ratio is water Density value conversion mass ratio; other component volume ratio conversion mass ratio weighing;

[0050] The volume dosage of the regenerated aggregate is 25% of the total volume of the microbial self-repairing concrete, based on the cement in the concrete, the volume dosage of the Bacillus pasteurian bacteria liquid is 35% of the total volume of the microbial self-repairing concrete , the water-cement ratio is 0.48, the water-to-bacteria liquid ratio is 1.8; recycled aggregate: dry powder of Bacillus pasteurianus = 1: (0.007-0.013).

[0051] The concrete batching is composed of sand, stone, cement and water by volu...

Embodiment 2

[0069] With embodiment 1, difference is that the Bacillus pasteurian bacterial liquid concentration of the present embodiment is divided into 2~2.4×10 8 cfu / ml, 2~2.4×10 9 cfu / ml, 2~2.4×10 10 cfu / ml; the volume dosage of the Bacillus pasteurian bacteria solution is 35% of the total volume of the microbial self-repairing concrete; the specimens prepared under the three concentrations are respectively marked as BRC1, BRC2, and BRC3.

[0070] According to the mass ratio, the concrete is mixed according to sand: stone: cement: water = (3.08 ~ 3.32): (1.53 ~ 1.79): (1.02 ~ 1.27): (0.54 ~ 0.66), the cement is PO 42.5 grade, and the density is 3150kg / m 3 ; The fineness modulus of sand is 2.6, and the average particle size is 0.23-0.50mm; the apparent density of stone is 2670-2800kg / m 3 , the water content is 3.35-3.48%, and the water absorption rate is 1.77-1.91%. In the process of mixing, add (according to the volume percentage of self-repairing concrete) 25% recycled aggregate...

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Abstract

The invention discloses self-repairing concrete and a recycled aggregate assembled reinforced concrete coupling beam, and preparation methods thereof; the self-repairing concrete is microorganism self-repairing concrete, and is composed of concrete ingredients, a recycled aggregate and a bacillus pasteurii liquid according to the volume percentage; the volume mixing amount of the recycled aggregate is 20-30% of the total volume of the microbial self-repairing concrete, and the volume mixing amount of the bacillus pasteurii liquid is 32-38% of the total volume of the microbial self-repairing concrete. The recycled aggregate assembled reinforced concrete coupling beam is high in repairing efficiency, high in environmental friendliness, high in overall strength, high in anti-seismic propertyand easy to operate, and achieves the effects of construction waste recycling and good structural performance.

Description

technical field [0001] The invention relates to the technical field of special building materials, and relates to self-repairing concrete, recycled aggregate assembled reinforced concrete connecting beams and a preparation method thereof, in particular to a self-repairing concrete and a preparation method thereof, and an assembled prefabricated recycled aggregate self-repairing reinforced concrete connecting beam. Beams and methods of preparation. Background technique [0002] In the reinforced concrete shear wall structure system, the coupling beam is an important seismic energy-dissipating component and the first line of defense for the shear wall structure. It is the guarantee of force transmission between adjacent wall piers. By sharing the overturning moment resisted by the wall piers, dissipating a large amount of energy input under earthquake action, and improving the overall lateral stiffness of the structure, the overall seismic performance of the structure is great...

Claims

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Application Information

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IPC IPC(8): C04B28/04E04C3/20E04B1/98E04H9/02
CPCC04B28/04C04B2111/2053E04B1/98E04C3/20E04H9/02C04B2103/0001C04B18/16C04B14/02C04B14/06
Inventor 刘超张荣飞吕振源刘化威朱超
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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