CN202324627U

CN202324627U - Building template pad

Info

Publication number: CN202324627U
Application number: CN2011204664802U
Authority: CN
Inventors: 王燕飞
Original assignee: Hangzhou Yinbo Traffic Engineering Materials Co Ltd
Current assignee: Hangzhou Yinbo Traffic Engineering Materials Co Ltd
Priority date: 2011-11-22
Filing date: 2011-11-22
Publication date: 2012-07-11
Anticipated expiration: 2021-11-22

Abstract

The utility model relates to the field of building construction and aims at providing a building template pad and a building template provided with the pad. The pad consists of a surface layer and a bottom layer which are bonded to form a compound type structure; the surface layer plays a filtering action and is formed by knitting nylon, polyester, PP (Propene Polymer), PE (Poly Ethylene) or other plastic flat threads; the knitted clearances allow water, air and part of fine particles to pass and prevent larger cement particles from passing; and the bottom layer is formed by extrusion molding or knitting of plastic or knitting of natural fiber materials such as hemp and the like, and has functions of retaining water, repelling water and diverting water. The bottom layer is of a gridding structure, so that excessive water can be quickly drained out of the outside of the template when concrete is cast under the condition that no change for the temperature is carried out and further the freezing resistance of a concrete structure is remarkably improved. In addition, high humidity of the concrete during curing can be ensured and the crack risk and tiny cracks are reduced to be minimized; and meanwhile, surface defects such as sand holes and cracks and the like can be eliminated, the quality of the surface layer concrete is remarkably improved and the durability of the concrete is improved.

Description

A kind of construction formwork liner

Technical field

The utility model relates to the realm of building construction, specifically, is a kind of construction formwork liner, and the construction formwork that this construction formwork liner is installed.

Background technology

In the life-span of concrete structure, depend on the resistivity of concrete surface layer to a great extent to corrosive medium.Usually in concrete; Satisfy the 20-25% that the required water of cement aquation accounts for cement consumption; But satisfying certain construction workability requires required water to account for the 40-75% of cement consumption; After concreting work is accomplished, just become the harmful components in the concrete and surpass the needed moisture content of cement aquation, produced hole such as evaporating fully, produce alkali, corrosion of steel bar etc. with the carbon dioxide acting in conjunction.Traditional construction formwork is by material such as steel plate, veneering plates, is fluid-tight.In concreting process, because the effect of vibrating, water, air and the material that some are lighter can gather to the interface; Too much like this air and moisture; Strengthen the water/binder ratio (reduction cement factor) on top layer, reduced the top layer quality of concrete, formed defectives such as sand holes, crack, pore; And, accelerated the aggressivity material to reinforcing bar and concrete structural deterioration for corrosive medium provides passage to concrete substrate infiltration, migration.Because the shortcoming of common templates, these problems are to increase concrete intensity through using dissimilar cement, or solve through the chemical admixture that adds any amount mystery.

Last century, the eighties abroad occurred pasting the example that the template applications that absorbs water on the steel form and seep water obtains good effect in the engineering with woven lining; Begin flourish to the nineties; Get into domestic application about 2000; Go out fabric of the same type by Zhejiang University and the rich traffic engineering Materials Co., Ltd of Hangzhou silver joint research and development in 2005 and begin to be applied in the engineering, obtain good effect.

Make permeable template cloth with fabric, paste formed permeable template system on the steel form, can discharge the concrete surface layer redundant moisture preferably; Significantly improve the quality of concrete surface layer; The template cloth made from no spinning process has water imbibition and water retention preferably, but its drainability is relatively poor under the condition of naturally osmotic, particularly when the large tracts of land template is used; Often can not discharge moisture content unobstructedly, thereby influence result of use; Sticking construction also comparatively bothers in addition, is difficult to reuse.

Summary of the invention

The purpose of the utility model is in order to overcome deficiency of the prior art, a kind of construction formwork liner to be provided, and the construction formwork that this construction formwork liner is installed.

For realizing above-mentioned purpose, the technical scheme of the utility model is following:

A kind of construction formwork liner, said liner is made up of surface course and bottom, forms composite structure.

As the further improvement of the utility model, said surface course is made up of nylon, polyester, PP, PE or the braiding of other plastic flat fiber material.

As the further improvement of the utility model, said bottom is made up of plastics or natural fiber material braiding, is formed with netted structure.

As the further improvement of the utility model, said natural fiber material is a kind of in cotton, fiber crops or other textile fabric.

As the further improvement of the utility model, said surface course and bottom are compound through bonding mode to be one.

The invention also discloses the construction formwork that this construction formwork liner is installed, can extensive use bridge tunnel engineering (bridge pier, crossbeam, rib, protective guard, dome etc.), sewage disposal device and treatment box, filtered water tank, dam, gate, Ship Structure, urban viaduct and other need the concrete component of fine surface.

The construction formwork liner of the utility model has compound double-layer structure; Surface course plays a role in filtering; Form by nylon, polyester, PP, PE or the braiding of other plastic flat fiber, slit ability permeate water, air and the part fine particle of braiding, and stop big cement granules to pass through; Bottom forms by plastics extrusion molding or braiding or by the braiding of natural fiber materials such as fiber crops, has the effect of water conservation, hydrophobic, water guide; Surface course is compound to through mode such as gluing with bottom.

Compare the construction formwork liner of conventional art, the advantage of the utility model construction formwork liner shows as:

1. surface course (filtration beds) is formed by the plastic flat fiber braiding; Adopt the method for braiding to compare with existing employing nonwoven hot-rolling method making template cloth; Available material ranges is wide; Can use high strength plastics such as the nylon more high temperature resistant, that intensity is higher, polyester, thereby make the utility model construction formwork liner have outstanding high temperature resistant, wear-resistant, decay resistance.

2. construction formwork pad surfaces layer even aperture distribution, the big or small stable and controllable processed of weaving method.

3. the utility model construction formwork liner is acidproof, alkaline-resisting, corrosion-resistant, and construction adaptability is strong.

4. the utility model construction formwork liner intensity is high, can be repeatedly used, and reduces cost.

5. the form lining that existing nonwoven hot rolling is processed, bottom surface are the villus fiber tissue, and in the bigger occasion of template area, its villus fiber tissue can not be discharged the template outside with moisture content quickly and effectively; The bottom of the utility model construction formwork liner is a fenestral fabric, can be under the situation of template not being done any change (like punching), and unnecessary moisture content is discharged the template outside during rapidly with concrete pouring.

6. can play water conservation when the primer of the utility model construction formwork liner uses water-absorbing material such as fiber crops, fiber, preserve moisture, the effect of maintenance.

During use, bottom is gluing, stretch-draw or be pinned on the template, unnecessary mixing water, bubble passes the surface filtration layer and gets into bottom when concreting, and the some self-restraint in the moisture are in bottom, and remaining moisture is derived template outside.After unnecessary mixing water was discharged, the ratio W/C value of concrete surface layer water and cement just reduced, and the top layer compactness increases, and has improved concrete intensity and tear resistance; Reduce the critical aperture, improve permeability resistance, anti-medium dipped type,, obviously improve the frost resistance of concrete structure, guarantee also that in addition concrete keeps high humility between curing time, crack risk and minute crack are reduced to minimum because of having reduced the immersion of moisture content; Simultaneously can eliminate surface blemishes such as sand holes, crackle, obviously improve the top layer quality of concrete, improve concrete durability.

Construction formwork behind employing the utility model liner when fluid concrete, can be got rid of being enriched in its surperficial water and air; Driving cement granules in the time of water seepage moves to concrete surface; Reduced the water/binder ratio in concrete surface zone, pore reduces, and internal construction is fine and close.Simultaneously under scavenging action; Concreting top layer bubble is difficult to retain, and meetings such as the hole that the bubble discharge is produced, pore are filled by the cement particulate of being carried secretly in the concrete drainage procedure, form rich cement paste layer at concrete surface layer; It is top-quality that thereby the concrete that makes the top layer becomes in the total thing; Improve case hardness, tensile strength and abrasion resistance, reduce the critical aperture, improve permeability resistance, anti-medium dipped type.

Its superiority shows as:

1. can make concrete surface greatly reduce sand holes and crackle.

2. improved top layer density, made concrete surface layer fine and close, solid, even, make concrete structure abrasion resistance, erosive wear resistance be improved significantly; Prolong the application life of concrete structure because of the infiltration that has suppressed inorganic salts, oxygen, moisture and carbon dioxide.

3. can resist external erosion, Corrosion Protection is high, the particularly diffusion of chlorion.

4. owing to do not had sand holes and crack, make the quite dense of concrete surface, residues such as oils have been reduced on the surface, have just reduced the chance of microbial growth; Thereby reduce bacterium and algal grown, promptly reduced pollution.

5. whole cost lowers,, the expense of follow-up maintenance significantly reduces.

6. use the utility model construction formwork liner can increase surface tension, guarantee that surface coating more can be attached on concrete surface.Before coating application, needn't make to beat husky operation, optimal carrier when being surfacing.

7. quick construction is simple, and product is reusable, can save cost;

8. do not need remover, make things convenient for demoulding.

9. with common inexpensive template, template is not because of needing directly to contact concrete, so the access times of turnover also can increase relatively.

10. save the expense of repairing sand holes and crackle.

Description of drawings

Fig. 1 is the structural representation of the utility model specific embodiment.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, the construction formwork liner of the utility model is divided into compound up and down two layer 1 and 2; Surface course 1 is made up of nylon, polyester, PP, PE or the braiding of other plastic flat fiber material, and bottom 2 is made up of plastics, cotton, fiber crops or the braiding of other textile fabric natural fiber material, and is formed with netted structure, is convenient to discharge rapidly excessive moisture; Surface course 1 is bonded as one with bottom 2 and uses, and the special-purpose spray of the Pa Mifu template cloth glue that can adopt on the market to be sold carries out bonding, and effect is best.

Bonding form lining through the mode of gluing, stretch-draw or nail, is installed on the surface of common building template 3 again, is applied to then in the concreting engineering.

At last, it should be noted that above what enumerate only is a kind of specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and a lot of distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought the protection domain of the utility model.

Claims

1. a construction formwork liner is characterized in that, said liner is made up of surface course (1) and bottom (2), forms composite structure.

2. construction formwork liner according to claim 1 is characterized in that, said surface course (1) is made up of nylon, polyester, PP, PE or the braiding of other plastic flat fiber material.

3. construction formwork liner according to claim 1 is characterized in that, said bottom (2) is made up of plastics or natural fiber material braiding, is formed with netted structure.

4. construction formwork liner according to claim 3 is characterized in that, said natural fiber material is a kind of in cotton, fiber crops or other textile fabric.

5. according to each described construction formwork liner in the claim 1 to 4, it is characterized in that said surface course (1) and bottom (2) are compound through bonding mode to be one.

6. a construction formwork is characterized in that, the mounted on surface of the said template requirement 1 described construction formwork liner of having the right.

7. construction formwork according to claim 6 is characterized in that, said construction formwork liner is fixed through gluing, stretch-draw or the mode of nail and the surface of said construction formwork.