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Method for reinforcing reinforced concrete slab through prefabricating pre-stress TRC sheet

A technology of reinforced concrete slabs and concrete slabs, applied in building maintenance, construction, building construction, etc., can solve problems such as poor operability, inability to bear tension, and inconvenient operation, so as to reduce overhead construction, increase bearing capacity, and facilitate transport effect

Active Publication Date: 2016-02-24
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing research on the application of TRC materials has not specifically involved the reinforcement of slab members. The existing cast-in-place TRC reinforcement methods require a lot of upward construction, which is inconvenient to operate, and the use of non-prestressed TRC thin slab reinforcement cannot fully utilize the TRC material. Tensile properties, poor reinforcement
[0003] Chinese patent CN201310310742X is a prefabricated TRC plate reinforcement reinforced concrete device and interface treatment method, which solves the problem of poor operability when using existing TRC materials to reinforce concrete structures in upward construction
[0004] However, the prefabricated TRC plate reinforcement reinforced concrete device disclosed in the above-mentioned prior art has the following disadvantages: first, only using non-metallic fiber fabrics is not enough to enhance the tensile performance of the prefabricated TRC plate; Stress, so that the tensile strength of the TRC material is not fully utilized, so that it cannot bear more tensile force, and the reinforcement effect is not good

Method used

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  • Method for reinforcing reinforced concrete slab through prefabricating pre-stress TRC sheet
  • Method for reinforcing reinforced concrete slab through prefabricating pre-stress TRC sheet

Examples

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Embodiment 1

[0042]A method for prefabricating prestressed TRC slabs to strengthen reinforced concrete slabs, comprising making prestressed TRC thin slabs, interface treatment, and upward construction; the prestressed TRC thin slabs are composed of high-performance composite mortar 3, alkali-resistant fiber mesh 4 and stainless steel bars 5 , specifically made by the following steps:

[0043] (1) Cut the alkali-resistant fiber mesh 4 into a well-shaped shape with two strips in the vertical and horizontal directions. The length L of the strips is consistent with the length of the reinforced concrete slab 1. The width of each strip is 350mm. Intersect at 1 / 5L from the end;

[0044] (2) Pierce a stainless steel bar 5 in the middle of each strip;

[0045] (3) Pour 5 mm of high-performance composite mortar 3 on the bottom formwork, place the alkali-resistant fiber mesh 4 cut in step (1) on the surface of the composite mortar, and place the end of the alkali-resistant fiber mesh 4 on the tensil...

Embodiment 2

[0055] A method for prefabricating prestressed TRC slabs to strengthen reinforced concrete slabs, comprising making prestressed TRC thin slabs, interface treatment, and upward construction; the prestressed TRC thin slabs are composed of high-performance composite mortar 3, alkali-resistant fiber mesh 4 and stainless steel bars 5 , specifically made by the following steps:

[0056] (1) Cut the alkali-resistant fiber mesh 4 into a well-shaped shape with two strips in the vertical and horizontal directions. The length L of the strips is consistent with the length of the reinforced concrete slab 1. The width of each strip is 400mm. Intersect at 1 / 4L from the end;

[0057] (2) Pierce a stainless steel bar 5 in the middle of each strip;

[0058] (3) Pour 6 mm of high-performance composite mortar 3 on the bottom formwork, place the alkali-resistant fiber mesh 4 cut in step (1) on the surface of the composite mortar, and place the end of the alkali-resistant fiber mesh 4 on the tensi...

Embodiment 3

[0068] A method for prefabricating prestressed TRC slabs to strengthen reinforced concrete slabs, comprising making prestressed TRC thin slabs, interface treatment, and upward construction; the prestressed TRC thin slabs are composed of high-performance composite mortar 3, alkali-resistant fiber mesh 4 and stainless steel bars 5 , specifically made by the following steps:

[0069] (1) Cut the alkali-resistant fiber mesh 4 into a well-shaped shape with two strips in the vertical and horizontal directions. The length L of the strips is consistent with the length of the reinforced concrete slab 1. The width of each strip is 450mm. Intersect at 1 / 4L from the end;

[0070] (2) Pierce a stainless steel bar 5 in the middle of each strip;

[0071] (3) Pour 7 mm of high-performance composite mortar 3 on the bottom formwork, place the alkali-resistant fiber mesh 4 cut in step (1) on the surface of the composite mortar, and place the end of the alkali-resistant fiber mesh 4 on the tensi...

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Abstract

The invention discloses a method for reinforcing a reinforced concrete slab through prefabricating a pre-stress TRC sheet. The method comprises steps of the manufacturing of the pre-stress TRC sheet, interface processing and faceup construction. The method has advantages that: as TRC materials are high in plasticity and are easy to process, the TRC sheet is made in a bidirectional # shape, strips in the two directions can bear the force, and force-bearing demands of a reinforced concrete slab member are met; the TRC sheet is relatively thin and light, and the thickness and weight of the TRC sheet has little influence on the structural appearance and the using space; compared with reinforced concrete, the TRC sheet employs nonmetal fiber fabric and stainless steel, and an interface agent MPC is an inorganic material, so that the reinforcing method is quite suitable for a damaged RC structure in the corrosion environment by means of the interface processing manner; compared with a common fiber composite material cloth reinforcing structure, an alkali-resistant fiber web bearing the load is protected by a high-performance fine-aggregate concrete layer and cannot be easily influenced by scratch and fire hazards; by employing the TRC sheet to reinforce the reinforced concrete slab, the tensile property of the TRC materials can be fully utilized, and therefore the flexural bearing capacity is enhanced.

Description

technical field [0001] The invention belongs to the field of building engineering structure reinforcement, in particular to a method for reinforcing a reinforced concrete slab with a prefabricated prestressed TRC slab. Background technique [0002] Due to the influence of factors such as service life limit, function change, disaster effect, and construction quality, there are a large number of buildings in my country that need to be reinforced and repaired. Traditional reinforcement methods such as: increasing the cross-section reinforcement method increases the structure's own weight, and the construction period is long; the reinforcement method of adding a support system has a greater impact on the appearance of the structure and the use of space; fiber composite material (FRP) reinforcement method, outsourcing steel reinforcement method, etc. Problems such as durability and high temperature resistance after structural reinforcement cannot be solved. Textile Reinforced Co...

Claims

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Application Information

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IPC IPC(8): E04G23/02
CPCE04G23/0218
Inventor 贾程陈卉卉荀勇杨建明支振东
Owner YANCHENG INST OF TECH
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