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A fiber braided mesh reinforced cement-based composite plate for strengthening concrete flexural members and its manufacturing method

A technology of fiber woven mesh and reinforced cement, which is applied in building maintenance, manufacturing tools, building construction, etc., can solve the problems of fiber material peeling damage, board surface cracking, etc., and achieve the effects of delaying cracking, improving bearing capacity, and increasing ductility Effect

Inactive Publication Date: 2017-12-01
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So as to effectively solve the problem that the fiber material is prone to peeling damage and the cracking problem of the board surface caused by the asymmetric application of prestress

Method used

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  • A fiber braided mesh reinforced cement-based composite plate for strengthening concrete flexural members and its manufacturing method
  • A fiber braided mesh reinforced cement-based composite plate for strengthening concrete flexural members and its manufacturing method
  • A fiber braided mesh reinforced cement-based composite plate for strengthening concrete flexural members and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] As attached Figure 4 As shown, a fiber woven mesh reinforced cement-based composite board for reinforcement of concrete bending members and a manufacturing method thereof include the following steps:

[0036] 1) Lay the mold precisely flat, the mold size is 2100mm×150mm×25mm (length×width×height);

[0037] 2) Arrange 5mm thick bottom positioning strip;

[0038] 3) Prepare the steel fiber reinforced cement matrix (3) and pour it on the template with a thickness of 5mm as the bottom protective layer; the mixing ratio of the steel fiber reinforced cement matrix (3) is: 52.5 Portland cement 800kg / m 3 , Superfine fly ash 100kg / m 3 , Silica fume 100kg / m 3 , 800kg / m of silica sand with a particle size of 0-0.6mm 3 , 400kg / m of silica sand with a particle size of 0.6-1.2mm 3 , Steel fiber 85kg / m 3 , Water 286kg / m 3 , Water reducing agent 2.0kg / m 3 ; The preparation method of steel fiber reinforced cement matrix (3) is: put cement, fly ash, silica fume, sand, steel fiber in the mixer a...

Embodiment 2

[0047] As attached Figure 5 As shown, a fiber woven mesh reinforced cement-based composite board for reinforcement of concrete bending members and a manufacturing method thereof include the following steps:

[0048] 1) Lay the mold precisely flat, the mold size is 2100mm×150mm×25mm (length×width×height);

[0049] 2) Arrange 3mm thick bottom positioning strip;

[0050] 3) Prepare the steel fiber reinforced cement matrix (3) and pour it on the template with a thickness of 3mm as the bottom protective layer; the mixing ratio of the steel fiber reinforced cement matrix (3) is: 52.5 Portland cement 800kg / m 3 , Superfine fly ash 100kg / m 3 , Silica fume 100kg / m 3 , 800kg / m of silica sand with a particle size of 0-0.6mm 3 , 400kg / m of silica sand with a particle size of 0.6-1.2mm 3 , Steel fiber 85kg / m 3 , Water 286kg / m 3 , Water reducing agent 2.0kg / m 3 ; The preparation method of steel fiber reinforced cement matrix (3) is: put cement, fly ash, silica fume, sand, steel fiber in the mixer ...

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Abstract

The invention discloses a textile reinforced cement matrix composite board for reinforcement of concrete flexural members and a production method thereof. The textile reinforced cement matrix composite board comprises a prestressed textile (1), shearing chopped steel fibers (2), a steel fiber reinforced cement matrix (3) and an ordinary cement matrix (4), wherein the shearing chopped steel fibers (2) are vertically inserted into mesh holes of the prestressed textile (1), the steel fiber reinforced cement matrix (3) is poured on protective layers at the top and the bottom of the composite board, the ordinary cement matrix (4) is poured between layers of the prestressed textile (1), and the prestressed textile (1) is a carbon textile or glass textile. When the concrete flexural members are reinforced by the composite board, the problem that fiber materials are easy to peel off during reinforcement of external bonding of FRP is solved. The composite board has the advantages of slowing down cracks, improving ductility and giving full play to high-strength characteristics of fiber materials.

Description

Technical field [0001] The invention relates to the technical field of building structure reinforcement, in particular to a fiber woven mesh reinforced cement-based composite board for reinforcement of concrete bending members and a manufacturing method thereof. Background technique [0002] In recent years, with the rapid development of our country's economy, the load borne by various buildings is increasing. Coupled with the aging of buildings, various natural disasters and man-made damages, existing buildings continue to produce various safety hazards. According to conservative estimates, more than 40% of my country's existing reinforced concrete building area needs to be identified and reinforced in stages and batches. It can be seen that reinforcement and reinforcement of building structures will surely become an important branch of the construction industry. Therefore, it is very necessary to develop and study reliable reinforcement and reinforcement technology for building...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G23/02B28B23/04
CPCB28B23/043E04G23/0218
Inventor 周芬刘玲玲杜运兴
Owner HUNAN UNIV
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