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High toughness cement-based material-nonmetal fiber rib composite structure as well as application and application method thereof

A cement-based material, non-metal fiber technology, applied in the direction of structural elements, truss structure, building material processing, etc., can solve the problems of reduced bearing capacity, reduced durability, concrete cracking, etc., to improve bearing capacity and durability. , good electromagnetic shielding effect, the effect of reducing the aging speed

Inactive Publication Date: 2014-07-23
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of existing reinforced concrete structures such as concrete cracking, steel bar corrosion, durability reduction, and bearing capacity drop, the present invention provides a high-toughness cement-based material-non-metallic fiber composite structure and its application method; it can not only improve the structure It can also control the development of cracks, improve the durability of the structure, and reduce the aging speed of the structure; it also has a good electromagnetic shielding effect, which provides assistance for military and medical treatment; provides engineering structures New reinforcement materials and methods make the choices more diverse

Method used

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  • High toughness cement-based material-nonmetal fiber rib composite structure as well as application and application method thereof
  • High toughness cement-based material-nonmetal fiber rib composite structure as well as application and application method thereof
  • High toughness cement-based material-nonmetal fiber rib composite structure as well as application and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: 15mm thick basalt fiber reinforcement-PVA fiber reinforced cement-based material composite sheet structure example

[0037] The volume mixing rate of PVA fiber in the matrix is ​​2%, and the matrix slurry ratio: cement: fine sand: fly ash: metakaolin: silica fume: water: water reducing agent=1:1.43:1.43:0.29:0.14: 0.86:0.036; the cement type is 42.5 grade, the fine sand is 80-120 mesh, the fly ash is the first grade fly ash, the metakaolin is DX-80M type, the silica fume is micro silica fume, and the water reducer is polycarboxylic acid Salt water reducer, fiber reinforcement adopts basalt fiber reinforcement.

[0038] Test piece processing process: first put cement, fine sand, fly ash, metakaolin, and silica fume into the mixer and stir evenly for about 2-3 minutes; then weigh the corresponding weight of water, and mix the water reducer and Stir the water evenly, and put the weighed PVA fiber into the mixed liquid of water reducing agent and water to fully ...

Embodiment 2

[0040] Example 2: An application example of high-toughness cement-based material-non-metal fiber reinforced composite thin plate replacing steel bar and concrete in the tension area of ​​a concrete beam

[0041] Reinforcement cage binding: stirrups, Ф8HPB235 steel bars for vertical bars, and Ф12 basalt fiber composite bars (BFRP bars) for stressed longitudinal bars. The thickness of the top and bottom reinforcement protective layer is 20mm (the concrete thickness from the concrete surface to the stirrup surface).

[0042] Pouring composite beams: when pouring, pour PVA fiber-reinforced cement-based composite material with a thickness of 50mm into the formwork first, vibrate and compact it, and continue to pour C30 concrete with a thickness of 150mm on the surface before the initial setting of the cement-based composite material, and Shake again to firm up.

[0043] Wet curing: Remove the mold after 24 hours, put it in a standard curing room for 28 days.

[0044] The new comp...

Embodiment 3

[0046] Example 3: Cast-in-place PVA fiber-reinforced cement-based material-carbon fiber reinforced composite thin plate reinforced concrete beam example

[0047] Concrete base surface treatment: Grind the concrete base surface with an angle grinder, and chisel the rough base surface with a flower hammer and an electric hammer to form random unevenness to increase the roughness of the bonding surface.

[0048] Implantation of rivets: pre-embed rivets at a certain interval on the bottom of the beam, use an electric hammer to vertically align the concrete on the bottom of the beam to drill holes, then remove the dust in the holes and inject glue into the holes, and then drive in special-shaped rivets one by one.

[0049] Flushing of floating dust on the base surface: Use high-pressure water to clean the powder ash and oil stains on the concrete surface and keep it in a moist state.

[0050] Spray reinforced concrete interface agent for reinforcement: before applying the interface...

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Abstract

The invention discloses a high toughness cement-based material-nonmetal fiber rib composite structure. According to the structure, a high toughness cement-based material is adopted as a base material, nonmetal fiber rib is adopted as directional reinforcing rib; the high toughness cement-based material comprises the following components in percentage by weight: 35% of cement, 45-55% of fly ash, 5-10 % of silicon ash and 5-10% of metakaolin; high-strength short fiber is one or more out of polyvinyl alcohol fiber, polyethylene fiber, carbon fiber and aramid fiber; the nonmetal fiber rib is carbon fiber reinforced plastic rib, aramid fiber reinforced plastic rib, glass fiber reinforced plastic rib or basalt fiber reinforced plastic rib. The invention further discloses applications and an application method of the high toughness cement-based material-nonmetal fiber rib composite structure. The high toughness cement-based material and the nonmetal fiber rib are utilized to reinforce the reinforced concrete structure, so that the bearing capacity and the durability of the structure are increased and the aging speed of the structure is reduced.

Description

technical field [0001] The invention relates to building reinforcement and high-performance engineering structures, in particular to a high-toughness cement-based material-nonmetallic fiber reinforcement composite structure and its application and method. Background technique [0002] Concrete has good compressive properties and can be combined with steel bars to form a good load-bearing structure. Therefore, most buildings and bridges are currently reinforced concrete structures. However, due to the poor tensile properties and ductility of concrete, in actual engineering, reinforced concrete structures are prone to cracks under load. With the intrusion of harmful substances such as chloride ions, carbon dioxide, and moisture, the steel bars continue to Corrosion and expansion, concrete cracking, and peeling of the concrete protective layer lead to reduced structural durability and bearing capacity, which have a great impact on the safety of buildings and bridge structures. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C5/07E04G23/02E04C3/20E04G21/00C04B28/00C04B16/06C04B14/38
Inventor 王海龙孙晓燕彭光宇罗月静
Owner ZHEJIANG UNIV
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