CN103266760B - A kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof - Google Patents

A kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof Download PDF

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Publication number
CN103266760B
CN103266760B CN201310178191.6A CN201310178191A CN103266760B CN 103266760 B CN103266760 B CN 103266760B CN 201310178191 A CN201310178191 A CN 201310178191A CN 103266760 B CN103266760 B CN 103266760B
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template
mesh grid
composites
permanent
shaped
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CN201310178191.6A
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Chinese (zh)
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CN103266760A (en
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李庆华
徐世烺
黄博滔
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浙江大学
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Abstract

The invention discloses a kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof.Template cross section is matrix, and inside is distributed with groove.Patent of the present invention uses as beam forms in industry and Civil structure, hydro-structure and port sea structure isostructural beam stage of building, build shaping rear double do this structure protected apron and external protection bear a part of load.Template described in patent of the present invention selects following different materials to make: non metal fiber woven net refinforced cement based composites, gauze wire cloth refinforced cement based composites etc., and have simple for production, easy to use, durability is high, the feature that control fragility can be good.

Description

A kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof

Technical field

The invention belongs to a kind of construction formwork; specifically a kind of high-durability permanent formwork being mainly used in industry and Civil structure, hydro-structure and the isostructural beam of port sea structure; use as template in the stage of building; build shaping rear double protected apron and the external protection doing structure, bear the structural load of a part simultaneously.The invention still further relates to the preparation method of template.

Background technology

At present, in domestic construction field, industry uses the template such as wooden form, steel form usually with Civil structure, hydro-structure and the port isostructural beam of sea structure, there is the unfavorable factors such as consumption is large, dismounting is inconvenient, have enough to meet the need costly, utilization rate is low.Endurance issues is one of subject matter of facing of reinforced concrete structure all the time.In structure under conventional situation, ordinary concrete surface is naturally exposed, and durability is lower, and the house of current China nearly 50% enters the ageing step, and namely the building of 23.4 hundred million square metres faces endurance issues.In addition, to carry out using cracking resistance as controlled condition designing be hydro-structure, sea, port structure etc. is different from the key character of other types building structure, the normal work that ordinary concrete problem easy to crack not only can affect hydro-structure etc. also can affect its durability and application life, the serious safe operation that even can affect structure.Some is industry and more scabrous problem in Civil structure, hydro-structure and the construction such as structure of sea, port and use procedure all the time above.

Summary of the invention

The present invention's technical problem first to be solved is to provide a kind of fiber knitted net refinforced cement based composites permanent beam template, to improve the unfavorable factor that conventional template is brought, improve structure durability simultaneously, reduce structure later maintenance cost and the application life of final extending structure, for this reason, the present invention is by the following technical solutions:

A kind of fiber knitted net refinforced cement based composites permanent beam template, it forms beam forms by panel, the cross section of described panel is concave character type, inner surface is distributed with groove, and described panel selects following different materials to make: non metal fiber woven net refinforced cement based composites, braided steel wire net refinforced cement based composites.

The cement-base composite material that described non metal fiber woven net strengthens is made up of non-metallic fibers net and cement based matrix, described non metal fiber woven net comprises: Carbon Fibre Textile, aramid fiber mesh grid, alkali-resistant glass fibre mesh grid, vinal mesh grid, polyethylene fibre mesh grid or assorted fibre mesh grid, has the two or more fiber being selected from above fiber in assorted fibre; The mortar constituent of cement based matrix is except mixing water, also comprise: in portland cement, high alumina cement, sulphate aluminium cement one or more, active mineral fine mineral admixture, water reducing agent, sand, described active mineral fine mineral admixture is the material with pozzolanic activity.

The material of pozzolanic activity comprises one or more in flyash, silica flour, granulated blast-furnace slag.

In addition, the mortar preferred mass proportioning of the cement based matrix of described cement-base composite material is: cement: water: flyash: silicon ash: water reducing agent: coarse sand: fine sand=1:(0.45 ~ 0.55): (0.3 ~ 0.36): (0.05 ~ 0.1): (0.006 ~ 0.01): (0.9 ~ 1.0): (1.8 ~ 2.0), the particle size range of its medium coarse sand is at 0.6 ~ 1.2mm; Fine sand particle size range is 0 ~ 0.6mm.

Non metal fiber woven net is by pre-stretch-draw and at the surface smear epoxy resin except bending part.

Another technical problem to be solved of the present invention is to provide a kind of preparation method of above-mentioned fiber knitted net refinforced cement based composites permanent beam template.For this reason, the present invention is by the following technical solutions:

The fixture and W section mould plate that are provided with U-shaped mesh grid are spliced into template and build device, die cavity in W section mould plate is made up of both wings die cavity and top die cavity, two side templates of the corresponding concave shape panel of difference and bottom plate moulding, U-shaped mesh grid is inserted in both wings die cavity and top die cavity, from the upper opening of W section mould plate the mortar of cement based matrix is added pouring template device and vibrates; The shaping rear form removal of template, prunes the mesh grid that both sides are unnecessary, becomes fiber knitted net refinforced cement based composites permanent beam template after maintenance.

U-shaped fiber knitted net manufacturing process is as follows: the non metal fiber woven net of required size is carried out two directions tension, and uses fixture to fix the mesh grid after stretch-draw; The mesh grid surface smear epoxy resin be fixed, and epoxy resin is not smeared in the region that need bend during the U-shaped fiber knitted net of reserved making; After epoxy resin cure, mesh grid forms the region of three pieces of sclerosis, is bent into mesh grid U-shaped along above-mentioned region of not smearing epoxy resin and uses fixture to be fixed the making namely completing U-shaped mesh grid at its two ends.

When mesh grid is braided steel wire net, without the need to carrying out stretch-draw and epoxy resin is smeared, is directly bent into U-shaped and uses fixture to be fixed at its two ends thus complete the making of U-shaped braided steel wire net.

There is protruding stupefied bar described W section mould plate inside, and its size is consistent with the groove size in described permanent beam template; The fixture of described U-shaped mesh grid is formed by external member and internals and coordinated clamps U-shaped mesh grid.

What described template built that device carries out beam forms under horizontal positioned builds making.

The size of described fiber knitted net refinforced cement based composites permanent beam template can meet the needs of difformity size, height and span size according to actual needs by the geomery adjusting panel, preparation method is simple, easy to use.

Owing to adopting technical scheme of the present invention; the present invention used as template in the stage of building; build shaping after, do not need to remove, and double protected apron and the external protection doing structure; become permanent formwork; itself cost is low and also eliminate demolition cost and turnover expense, reduces engineering cost, can improve and solve the problems such as dismounting in the template constructions such as industry and the extra large structure in Civil structure, hydro-structure and port and utilization rate; reduce construction intensity, greatly can shorten the engineering time.Meanwhile, because this template is made up of non metal fiber woven net refinforced cement based composites or gauze wire cloth refinforced cement based composites, the feature such as there is high stretching ductility and Crack Control ability, damage tolerance is high, energy absorption capability is strong, effectively can reduce the harmful cracks of body structure surface generation and suppress crack progressing, its chloride-penetration resistance and water resistant permeance property are much better than ordinary concrete, can significantly improve durability and the application life of concrete structure.Meanwhile, adopt the structure of panel of the present invention, have and make simply, assemble easy to use, durability is high, the feature that control critical eigenvalue is carried out.Template of the present invention can also be born part-structure load and reduce the inner amount of reinforcement of beam, and improves the shear strength of beam.

Accompanying drawing explanation

Below for the mark among accompanying drawing illustrates: 1 is permanent beam template, and 11 is the grooves in beam forms, 12 is two side templates of concave shape panel, and 13 is bottom templates of concave shape panel; 2 is the fiber knitted nets in template; 3 is fixtures of fixing stretch-draw fiber knitted net; 4 is the fixtures making U-shaped mesh grid, and 41 is external members of fixture 4, and 42 is internals of fixture 4; 5 is W section mould plates, and 51 is the stupefied bars of projection on W section mould plate, and 52 is the both wings die cavitys in W section mould plate, and 53 is the top die cavity in W section mould plate; 6 is the cement-base composite materials of building.

Fig. 1 (a) is beam forms structural representation of the present invention.

Fig. 1 (b) is the top view of beam forms of the present invention.

Fig. 1 (c) is the lateral view of beam forms of the present invention.

Fig. 1 (d) is the A-A sectional view of Fig. 1 (b).

Fig. 2 (a) is schematic diagram when being fixed by fixture after mesh grid stretch-draw of the present invention.

Fig. 2 (b) is lateral view when being fixed by fixture after mesh grid stretch-draw of the present invention.

Fig. 2 (c) is top view when being fixed by fixture after mesh grid stretch-draw of the present invention.

Fig. 3 (a) is the schematic diagram after U-shaped mesh grid of the present invention is produced.

Fig. 3 (b) is the elevation after U-shaped mesh grid of the present invention is produced.

Fig. 3 (c) is the top view after U-shaped mesh grid of the present invention is produced.

Fig. 3 (d) is the lateral view after U-shaped mesh grid of the present invention is produced.

Fig. 4 (a) is the structural representation of W section mould plate of the present invention.

Fig. 4 (b) is the top view of W section mould plate of the present invention.

Fig. 4 (c) is the lateral view of W section mould plate of the present invention.

Fig. 4 (d) is the B-B sectional view of Fig. 4 (b).

Fig. 4 (e) is the C-C sectional view of Fig. 4 (b).

Fig. 5 (a) is the schematic diagram that template of the present invention builds device.

Fig. 5 (b) is the elevation that template of the present invention builds device.

Fig. 5 (c) is the top view that template of the present invention builds device.

Fig. 5 (d) is the lateral view that template of the present invention builds device.

Fig. 5 (e) is the D-D sectional view of Fig. 5 (b).

Fig. 5 (f) is the E-E sectional view of Fig. 5 (c).

Fig. 5 (g) is the F-F sectional view of Fig. 5 (c).

Fig. 6 is the manufacturing process schematic diagram of U-shaped mesh grid.

Fig. 7 is permanent beam template manufacturing process schematic diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing and a kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof detailed description of the invention, the invention will be further described, and this embodiment is to explanation of the present invention, instead of makes any restriction to the present invention.

A kind of mutual buckle type of the present embodiment can assembled anti-cracking and seepage control permanent beam template as shown in Fig. 1 (a) (b) (c) (d), permanent beam template forms beam forms by panel 1, the cross section of described panel is concave character type, and inner surface is distributed with groove 11.

The cement-base composite material that non metal fiber woven net strengthens is made up of non-metallic fibers net and cement based matrix, described non metal fiber woven net comprises: Carbon Fibre Textile, aramid fiber mesh grid, alkali-resistant glass fibre mesh grid, vinal mesh grid, polyethylene fibre mesh grid or assorted fibre mesh grid, has the two or more fiber being selected from above fiber in assorted fibre; The mortar constituent of cement based matrix is except mixing water, also comprise: in portland cement, high alumina cement, sulphate aluminium cement one or more, active mineral fine mineral admixture, water reducing agent, sand, described active mineral fine mineral admixture is the material with pozzolanic activity.

The material of pozzolanic activity comprises one or more in flyash, silica flour, granulated blast-furnace slag.

In addition, the preferred mass proportioning of the mortar of described cement-base composite material cement based matrix is: the mass ratio of each component is cement: water: flyash: silicon ash: water reducing agent: coarse sand: fine sand=1:(0.45 ~ 0.55): (0.3 ~ 0.36): (0.05 ~ 0.1): (0.006 ~ 0.01): (0.9 ~ 1.0): (1.8 ~ 2.0).The particle size range of its medium coarse sand is at 0.6 ~ 1.2mm; Fine sand particle size range is 0 ~ 0.6mm.

First the making of U-shaped mesh grid is carried out, as shown in Figure 6.The non metal fiber woven net of required size is carried out two directions tension, described two-way be orthogonal both direction, and by after stretch-draw mesh grid use fixture 3 fix, see Fig. 2 (a) (b) (c); At fixing mesh grid surface smear epoxy resin, and epoxy resin is not smeared in the region (width is 1 ~ 3cm) that need bend during the U-shaped fiber knitted net of reserved making; After epoxy resin cure, mesh grid forms the region of three pieces of sclerosis, mesh grid be bent into U-shaped along above-mentioned region of not smearing epoxy resin and use fixture 4 to be fixed the making namely completing U-shaped fiber knitted net at its two ends, seeing Fig. 3 (a) (b) (c) (d).The fixture 4 of U-shaped fiber knitted net used is above formed by external member 41 and internals 42 and coordinated clamps U-shaped fiber knitted net.

U-shaped fibroreticulate fixture and W section mould plate will be installed be spliced into template and build device, die cavity in W section mould plate 5 is made up of both wings die cavity 52 and top die cavity 53, two side templates 12 of the corresponding concave shape panel of difference and bottom template 13 moulding, there is protruding stupefied bar 51 W section mould plate 5 inside, and its size is consistent with groove 11 size in concave shape permanent beam template; Fixture 4 is by the closed at both ends of the die cavity in W section mould plate 5.

Permanent beam template manufacturing process as shown in Figure 7, U-shaped fleece is inserted in both wings die cavity and top die cavity, the fixture 4 and the W section mould plate 5(that are provided with U-shaped fiber knitted net are shown in Fig. 4 (a) (b) (c) (d) (e)) be spliced into template and build device (see Fig. 5 (a) (b) (c) (d) (e) (f)), described in horizontal positioned, template builds device, from the upper opening of W section mould plate, the cement based matrix mortar of cement-base composite material 6 is added pouring template device and vibrates; The shaping rear form removal of template, prunes the fiber knitted net that both sides are unnecessary, and maintenance becomes fiber knitted net refinforced cement based composites permanent beam template for 28 days afterwards, can normally use.

During construction, can according to real size need carry out the size of panel, quantitative design and assembling, the needs of different cross section size and span can be met by adjustment panel 1 and size dimension.

It is simple that preparation method provided by the present invention has making, easy to use, the feature that raising structure durability and control critical eigenvalue are carried out, and can meet the application demand of a large amount of engineering.

Claims (4)

1. the preparation method of fiber knitted net refinforced cement based composites permanent beam template, it is characterized in that: described fiber knitted net refinforced cement based composites permanent beam template is made up of panel (1), the cross section of described panel is concave character type, inner surface is distributed with groove, and described panel selects following material to make: non metal fiber woven net refinforced cement based composites;
Said method comprising the steps of:
The fixture (4) and W section mould plate (5) that are provided with U-shaped mesh grid are spliced into template and build device, die cavity in W section mould plate (5) is made up of both wings die cavity and top die cavity, two side templates of the corresponding concave shape panel of difference and bottom plate moulding, U-shaped mesh grid is inserted in both wings die cavity and top die cavity, from the upper opening of W section mould plate (5) mortar of cement based matrix is added pouring template device and vibrates; The shaping rear form removal of template, prunes the mesh grid that both sides are unnecessary, becomes fiber knitted net refinforced cement based composites permanent beam template after maintenance.
2. preparation method according to claim 1, is characterized in that: U-shaped fiber knitted net manufacturing process is as follows: the non metal fiber woven net of required size is carried out two directions tension, and uses fixture (3) to fix the mesh grid after stretch-draw; The mesh grid surface smear epoxy resin be fixed, and epoxy resin is not smeared in the region that need bend during the U-shaped fiber knitted net of reserved making; After epoxy resin cure, mesh grid forms the region of three pieces of sclerosis, is bent into mesh grid U-shaped along above-mentioned region of not smearing epoxy resin and uses fixture (4) to be fixed the making namely completing U-shaped mesh grid at its two ends.
3. preparation method according to claim 1, is characterized in that: there is protruding stupefied bar described W section mould plate (5) inside, and its size is consistent with the groove size in described permanent beam template; The fixture (4) of described U-shaped mesh grid is formed by external member (41) and internals (42) and coordinated clamps U-shaped mesh grid.
4. preparation method according to claim 1, is characterized in that: what described template built that device carries out beam forms under horizontal positioned builds making.
CN201310178191.6A 2013-05-14 2013-05-14 A kind of fiber knitted net refinforced cement based composites permanent beam template and preparation method thereof CN103266760B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103496865A (en) * 2013-09-16 2014-01-08 北京工业大学 Hybrid FRP (Fiber Reinforced Plastic) grid enhancedreinforced ECC (Engineered Cementitious Composite) and application thereof tostructure for reinforcing concrete structure
CN105019599A (en) * 2015-08-04 2015-11-04 万保金 Disassembly-free precast concrete beam insulation template
CN105350717B (en) * 2015-11-27 2017-12-29 浙江大学 A kind of arrangement of reinforcement formula pin joint permanent beam template, concrete structure member and manufacture method
CN105369981B (en) * 2015-11-27 2018-03-23 浙江大学 A kind of arrangement of reinforcement formula buckle connection permanent beam template, concrete structure member and manufacture method
CN106703288B (en) * 2016-11-18 2020-03-17 湖南大学 Method for manufacturing carbon fiber grid composite plate concrete continuous beam
CN106760190A (en) * 2016-11-18 2017-05-31 湖南大学 Concrete simply supported beam and preparation method based on carbon fiber mesh composite board
CN109555267A (en) * 2018-12-03 2019-04-02 广东工业大学 A kind of complex coagulation earth pillar and preparation method thereof

Citations (3)

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Publication number Priority date Publication date Assignee Title
US5391019A (en) * 1991-09-11 1995-02-21 Morgan; J. P. Pat Environmental enclosure structure and method of manufacture
CN102777027A (en) * 2012-08-17 2012-11-14 浙江大学 Interlocking dismountable anti-cracking anti-seepage permanent beam template
CN102808478A (en) * 2012-08-17 2012-12-05 浙江大学 Bolted dismountable anti-cracking impermeable permanent beam form

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5391019A (en) * 1991-09-11 1995-02-21 Morgan; J. P. Pat Environmental enclosure structure and method of manufacture
CN102777027A (en) * 2012-08-17 2012-11-14 浙江大学 Interlocking dismountable anti-cracking anti-seepage permanent beam template
CN102808478A (en) * 2012-08-17 2012-12-05 浙江大学 Bolted dismountable anti-cracking impermeable permanent beam form

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