CN205577464U - Be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board - Google Patents
Be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board Download PDFInfo
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- CN205577464U CN205577464U CN201620339622.1U CN201620339622U CN205577464U CN 205577464 U CN205577464 U CN 205577464U CN 201620339622 U CN201620339622 U CN 201620339622U CN 205577464 U CN205577464 U CN 205577464U
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Abstract
The utility model discloses a be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board, including prestressing force fibrage net (1), shear short cut steel fibre (2), steel fiber reinforced cement base member (3), portland cement base member (4), the weak point that shears is cut steel fibre (2) and is inserted perpendicularly in the net hole of prestressing force fibrage net (1), protective layer department at the bottom of this composite board ban ding and board is built to steel fiber reinforced cement base member (3), pour between prestressing force fibrage net (1) each layer portland cement base member (4), prestressing force fibrage net (1) is carbon fiber mesh grid or glass fiber mesh grid. This composite board reinforcing concrete flexural component of usefulness, fiber material exchanges the problem that the atress was peeled off when having solved the reinforcement of the external FRP of pasting effectively. This composite board has the advantage that delays fracture, increase ductility, the high powerful feature of full play fiber material.
Description
Technical field
This utility model relates to Structures Reinforced Technique field, is related specifically to a kind of fibre reinforced for concrete flexural member
Dimension mesh grid strengthens cement based composite board.
Background technology
In recent years, along with developing rapidly of China's economy, the load that all kinds of buildings bear increases day by day, adds building certainly
The reasons such as body natural disaster aging, various and artificial damage, existing building constantly produces various potential safety hazard.According to conservative estimation,
In China's existing reinforced concrete building area, about more than 40% needs to identify dribs and drabs and reinforce, it is seen that to building
Structure carries out reinforcing will become an important branch of building trade.Therefore, the benefit of the reliable building structure of developmental research
Strong reinforcement technique is the most necessary, has important social benefit and huge economic benefit.At the most numerous building structure strengthenings
In technology, external bonding FRP method for strengthening is widely applied with the advantage of its uniqueness, and the Heterosis of this reinforcing mode is:
The features such as the size of former component, corrosion resistance and good are not the most increased after high-strength light, reinforcing.But this reinforcing mode there is also
Weak point, such as easily stress is peeled off, consolidation effect is closely related with the performance of structure glue, it is durable to be directly exposed in air it
Property cannot ensure.
The patent application of Application No. 201310547509.3 disclose a kind of based on concrete flexural member reinforce composite board:
By pre-for fibrous material stretch-draw, fibrous material smears certain thickness high-strength mortar, forms composite board, then be reinforced
Structure is pasted.Cause fibrous material although this composite board can overcome after structure stress because of the out-of-flatness of concrete surface
The stripping damage produced, but owing to prestress application is at plate bottom fiber, after release prestressing force, composite board upwards arching can be caused
Deformation, makes this plate upper surface tension crack, and this sheet material is not easy to paste on concrete surface, increases difficulty of construction.
In order to overcome the problems referred to above, it is badly in need of developing the reinforcing sheet material that a kind of novel fibrous material is compound with cement based.
Utility model content
The purpose of this utility model is just to provide a kind of fiber knitted net enhancing cement based reinforced for concrete flexural member and is combined
Sheet material, by being arranged in cement matrix by fiber knitted net symmetry Shi Hanzhang, and combines " the shear-pin of chopped steel fibre
Bolt effect ", " bridge linking effect " formed composite board, then be reinforced component paste.Thus effectively solve fibrous material and easily send out
The problem of raw stripping damage and the asymmetric road surface crocking problem caused of prestress application.
For solving above technical problem, this utility model be the technical scheme is that
A kind of fiber knitted net reinforced for concrete flexural member strengthens cement based composite board, weaves including pre-stress fibre
Net, shearing resistance chopped steel fibre, steel fiber reinforced cement matrix, ordinary cement matrix；Shown in Figure 1.
Further, shearing resistance chopped steel fibre is vertically inserted in the grid hole of pre-stress fibre mesh grid；Steel fiber reinforced cement
Matrix is cast at protective layer at the bottom of this composite board Ban Ding and plate；Ordinary cement matrix be cast in each layer of pre-stress fibre mesh grid it
Between；Pre-stress fibre mesh grid is Carbon Fibre Textile or fiberglass braided net.
Further, pre-stress fibre mesh grid through-thickness symmetrical laying is in composite board, with the fiber of face symmetry in plate
Mesh grid has identical prestressing force, and prestress value is not less than the 20% of fiber knitted net ultimate strength.
Further, in steel fiber reinforced cement matrix, the volume volume of steel fibre controls at 1%-1.5%.
Further, the sand particle diameter in steel fiber reinforced cement matrix and ordinary cement matrix all weaves less than pre-stress fibre
The 1/2 of the shorter size of mesh opening of net.
Working mechanism of the present utility model is summarized as follows:
In order to improve composite board performance, and then improving consolidation effect, this utility model takes following method: 1. fiber knitted net
Being arranged symmetrically with and Shi Hanzhang, during release prestressing force, sheet material is by uniform precompression, thus is effectively improved opening of sheet material
Split load；2. shearing resistance chopped steel fibre is vertically inserted in pre-stress fibre mesh grid grid hole, utilizes steel fibre to compile with fiber
" shearing resistance dowel action " between knitmesh improves the cohesive force between fiber knitted net and cement matrix, is conducive to both to work in coordination with and is subject to
Power, thus it is effectively improved the ultimate bearing capacity of sheet material, see shown in accompanying drawing 2；3. steel fiber reinforced cement matrix utilizes steel
The fiber " bridge linking effect " at crack delays the development in crack, reduces fracture width, increases ductility, shown in Figure 3.
This utility model has the advantage that this utility model composite board can effectively delay cracking, increase ductility, fully
Play the high powerful feature of fibrous material.Use this composite board reinforced concrete flexural member, can significantly improve component bearing capacity,
Integral rigidity and durability, reach good consolidation effect.
Accompanying drawing explanation
Accompanying drawing 1 is the generalized section of this utility model composite board (arranging three layers of fleece).
Accompanying drawing 2 is the schematic diagram that steel fibre " shearing resistance dowel action " improves composite board stress performance.
Accompanying drawing 3 is the schematic diagram that steel fibre " bridge linking effect " increases composite board ductility.
Accompanying drawing 4 is the composite board generalized section of this utility model embodiment 1.
Accompanying drawing 5 is the composite board generalized section of this utility model embodiment 2.
In figure: 1-pre-stress fibre mesh grid, 2-shearing resistance chopped steel fibre, 3-steel fiber reinforced cement matrix, 4-ordinary cement
Matrix.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiment of the present utility model is further described, and provides embodiment.
It is that a kind of fiber knitted net reinforced for concrete flexural member strengthens cement based composite board as shown in Figure 1, its tool
The enforcement step of body is:
1) mould is accurately set level；
2) arranging bottom positioning strip, its thickness is consistent with protective layer thickness at the bottom of plate；
3) prepare steel fiber reinforced cement matrix (3), and be cast in template, until at bottom positioning strip upper surface, making
For protective layer at the bottom of plate；The preparation method of steel fiber reinforced cement matrix (3) is: put into cement, fine coal in blender by proportioning
Ash, silicon ash, sand, steel fibre stir 1 minute slowly, be subsequently adding water, water reducer continue stir 4 minutes slowly；
4) each layer fiber knitted net is arranged: bottom fiber mesh grid be placed on bottom positioning strip, at each layer fiber knitted net
Between arrange new positioning strip, make fiber knitted net be arranged symmetrically with along sheet metal thickness direction；
5) each layer fiber knitted net fixed, tighten and Shi Hanzhang；
6) prepare ordinary cement matrix (4), and be cast on pre-stress fibre mesh grid (1), guarantee of slightly vibrating
Cement matrix is fully infiltrated between each layer of fiber knitted net, is poured to top layer of fibrous mesh grid by ordinary cement matrix；Commonly
The preparation method of cement matrix (4) is: by proportioning put in blender cement, flyash, silicon ash, sand stir slowly 1 minute,
Be subsequently adding water, water reducer continues to stir 4 minutes slowly；
7) shearing resistance chopped steel fibre (2) is perpendicularly inserted in the grid hole of pre-stress fibre mesh grid (1)；
8) arranging top layer positioning strip, its thickness is consistent with plate top protective layer thickness；
9) on top layer of fibrous mesh grid, steel fiber reinforced cement matrix (3) is poured, until at top layer positioning strip upper surface, making
For plate top protective layer；
10) slightly vibrate pouring matrix and smooth out surface；
11) discharging prestressing force after cement matrix comprcssive strength reaches the 70% of standard value, form removal also carries out suitable maintenance.
Embodiment 1
As shown in Figure 4, a kind of fiber knitted net reinforced for concrete flexural member strengthens cement based composite board, its tool
The enforcement step of body is:
1) accurately being set level by mould, die size is 2100mm × 150mm × 25mm (length × width × height)；
2) 5mm thickness bottom positioning strip is arranged；
3) prepare steel fiber reinforced cement matrix (3), and it is thick, as protective layer at the bottom of plate to be cast in 5mm in template；Steel is fine
Dimension strengthens the match ratio of cement matrix (3): 52.5 portland cement 800kg/m3, superfined flyash 100kg/m3, silicon ash
100kg/m3, the silica sand 800kg/m of particle diameter 0-0.6mm3, the silica sand 400kg/m of particle diameter 0.6-1.2mm3, steel fibre 85kg/m3, water 286kg/m3, water reducer 2.0kg/m3；The preparation method of steel fiber reinforced cement matrix (3) is: by proportioning in stirring
Put into cement in machine, flyash, silicon ash, sand, steel fibre stir 1 minute slowly, are subsequently adding water, water reducer continues to stir 4 slowly
Minute；
4) fiber knitted net is placed on bottom positioning strip；The carbon that fiber knitted net uses size of mesh opening to be 5mm × 5mm is fine
Dimension mesh grid, fleece is through epoxy resin impregnation process and the most dried use, and the limit of surface treated carbon fiber is strong
Degree is 0.5kN/ root；
5) fiber knitted net is fixed, tightens and is applied the pretension of 3kN；
6) shearing resistance chopped steel fibre (2) is perpendicularly inserted in the grid hole of pre-stress fibre mesh grid (1)；
7) on pre-stress fibre mesh grid (1), 5mm thickness top layer positioning strip is arranged；
8) on pre-stress fibre mesh grid (1), pour 5mm thickness steel fiber reinforced cement matrix (3), protect as plate top
Layer；
9) slightly vibrate pouring matrix and smooth out surface；
10) discharging prestressing force after 3 days, form removal also carries out suitable maintenance.
Embodiment 2
As shown in Figure 5, a kind of fiber knitted net reinforced for concrete flexural member strengthens cement based composite board, its tool
The enforcement step of body is:
1) accurately being set level by mould, die size is 2100mm × 150mm × 25mm (length × width × height)；
2) 3mm thickness bottom positioning strip is arranged；
3) prepare steel fiber reinforced cement matrix (3), and it is thick, as protective layer at the bottom of plate to be cast in 3mm in template；Steel is fine
Dimension strengthens the match ratio of cement matrix (3): 52.5 portland cement 800kg/m3, superfined flyash 100kg/m3, silicon ash
100kg/m3, the silica sand 800kg/m of particle diameter 0-0.6mm3, the silica sand 400kg/m of particle diameter 0.6-1.2mm3, steel fibre 85kg/m3, water 286kg/m3, water reducer 2.0kg/m3；The preparation method of steel fiber reinforced cement matrix (3) is: by proportioning in stirring
Put into cement in machine, flyash, silicon ash, sand, steel fibre stir 1 minute slowly, are subsequently adding water, water reducer continues to stir 4 slowly
Minute；
4) ground floor fiber knitted net is placed on bottom positioning strip, arranges between first, second layer of fiber knitted net
3mm thickness positioning strip；The Carbon Fibre Textile that two-layer fiber knitted net all uses size of mesh opening to be 5mm × 5mm, fleece is through ring
Epoxy resins impregnation process and the most dried use, the ultimate strength of surface treated carbon fiber is 0.5kN/ root；
5) two-layer Carbon Fibre Textile is fixed, tightens and is applied the pretension of 6kN；
6) prepare ordinary cement matrix (4), and be cast on pre-stress fibre mesh grid (1), guarantee of slightly vibrating
Cement matrix is fully infiltrated between two-layer fiber knitted net, and ordinary cement matrix pours to second layer fiber knitted net；Commonly
The match ratio of cement matrix (4) is: 52.5 portland cement 800kg/m3, superfined flyash 100kg/m3, silicon ash 100kg/m3, the silica sand 800kg/m of particle diameter 0-0.6mm3, the silica sand 400kg/m of particle diameter 0.6-1.2mm3, water 286kg/m3, water reducer
2.0kg/m3；The preparation method of ordinary cement matrix (4) is: by proportioning put in blender cement, flyash, silicon ash,
Sand stirs 1 minute slowly, be subsequently adding water, water reducer continue stir 4 minutes slowly；
7) shearing resistance chopped steel fibre (2) is perpendicularly inserted in the grid hole of pre-stress fibre mesh grid (1)；
8) on second layer fiber knitted net, 3mm thickness top layer positioning strip is arranged；
9) on second layer fiber knitted net, 3mm thickness steel fiber reinforced cement matrix (3) is poured, as plate top protective layer；
10) slightly vibrate pouring matrix and smooth out surface.
11) discharging prestressing force after 3 days, form removal also carries out suitable maintenance.
Claims (4)
1. the fiber knitted net reinforced for concrete flexural member strengthens cement based composite board, it is characterised in that include
Pre-stress fibre mesh grid (1), shearing resistance chopped steel fibre (2), steel fiber reinforced cement matrix (3), ordinary cement matrix (4)；
Described shearing resistance chopped steel fibre (2) is vertically inserted in the grid hole of pre-stress fibre mesh grid (1)；Described Stainless-steel fibre
Cement matrix (3) is cast at protective layer at the bottom of this composite board Ban Ding and plate；Described ordinary cement matrix (4) is cast in pre-answering
Between power fiber knitted net (1) each layer；Described pre-stress fibre mesh grid (1) is Carbon Fibre Textile or fiberglass braided
Net.
A kind of fiber knitted net reinforced for concrete flexural member the most according to claim 1 strengthens cement based composite plate
Material, it is characterised in that described pre-stress fibre mesh grid (1) through-thickness symmetrical laying is in composite board, with face in plate
Symmetrical fiber knitted net has identical prestressing force, and prestress value is not less than the 20% of fiber knitted net ultimate strength.
A kind of fiber knitted net reinforced for concrete flexural member the most according to claim 1 strengthens cement based composite plate
Material, it is characterised in that in described steel fiber reinforced cement matrix (3), the volume volume of steel fibre controls at 1%-1.5%.
A kind of fiber knitted net reinforced for concrete flexural member the most according to claim 1 strengthens cement based composite plate
Material, it is characterised in that the sand particle diameter in described steel fiber reinforced cement matrix (3) and ordinary cement matrix (4) does not surpasses
Cross the 1/2 of pre-stress fibre mesh grid (1) shorter size of mesh opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620339622.1U CN205577464U (en) | 2016-04-21 | 2016-04-21 | Be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620339622.1U CN205577464U (en) | 2016-04-21 | 2016-04-21 | Be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board |
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| CN201620339622.1U Withdrawn - After Issue CN205577464U (en) | 2016-04-21 | 2016-04-21 | Be used for reinforced (rfd) fibrage of concrete flexural component net refinforced cement base composite board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781141A (en) * | 2016-04-21 | 2016-07-20 | 湖南大学 | Textile reinforced cement matrix composite board for reinforcement of concrete flexural members and production method thereof |
-
2016
- 2016-04-21 CN CN201620339622.1U patent/CN205577464U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105781141A (en) * | 2016-04-21 | 2016-07-20 | 湖南大学 | Textile reinforced cement matrix composite board for reinforcement of concrete flexural members and production method thereof |
| CN105781141B (en) * | 2016-04-21 | 2017-12-01 | 湖南大学 | A kind of fiber knitted net enhancing cement base composite board reinforced for concrete flexural member and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160914 Effective date of abandoning: 20171201 |