CN203347221U - Concrete pouring formwork - Google Patents

Abstract

The utility model relates to a concrete pouring formwork which comprises a steel formwork body and a water-permeable formwork body adhering to the side face of one side of the steel formwork body. The water-permeable formwork body and the steel formwork body are matched in size. The water-permeable formwork body comprises a surface layer, a middle layer and an adhesive layer. The surface layer and the middle layer are communicated through fine holes. According to the scheme, the water-permeable formwork body is arranged at the inner side of the steel formwork body so that in the concrete pouring process, redundant air and water in concrete can seep out through the water-permeable formwork body and flow out through the action of the fine holes and can not be concentrated, therefore, shortages of holes, sand spots, sand lines and the like on the surface of the concrete are effectively reduced, the surface of the concrete is fine and close, and the durability of the concrete is improved.

Description

Concrete-pouring template

Technical field

The utility model relates to concreting and maintenance technology field, relates in particular a kind of concrete-pouring template.

Background technology

The method of concreting structure is a lot, and for example fixed form method and slip-form, but the operation of building is substantially the same are all modeling (being building of template), concrete-agitating, concrete transportation and concreting and vibrate.

After test of many times and research, the inventor finds, there are some problems in the scheme of above-mentioned building concrete: no matter be fixed form method or slip-form, after concreting, template and concrete surface contact position can exist some air or unnecessary water, cause concrete surface to produce the diseases such as bubble, sand line, sand spot, had a strong impact on concrete durability and aesthetic property.

The utility model content

In view of this, the purpose of this utility model is to provide a kind of concrete-pouring template, and the concrete surface existed with the solution traditional approach produces the problem of the diseases such as bubble, sand line, sand spot, has guaranteed concrete durability and aesthetic property.

The technical solution of the utility model is as follows:

A kind of concrete-pouring template comprises:

Steel form;

Be adhered to the permeable template of steel form one side side, described permeable template and described steel form size coupling, and this permeable template cloth comprises top layer, intermediate layer and adhesion layer, wherein, described top layer and intermediate layer are communicated with by pore.

From technique scheme, can find out, the scheme that the utility model provides arranges permeable template in the steel form inboard, in concreting process and after process, empty G&W unnecessary in concrete can flow out by permeable template, do not form gathering, the generation of the concrete surface defects such as so effective minimizing bubble, sand spot, sand line.And, make component surface form the dense sclerosis layer that one deck is rich in hydrated calcium silicate, greatly improve concrete surface hardness, abrasion resistance, breaking resistance, do freezing property, concrete permeability, carbonation depth and chloride diffusion coefficient are also significantly reduced.In addition, in the certain hour after casting process completes, for concrete curing provides a good condition, reduced the generation of micro-cracks.

The accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to the accompanying drawing provided other accompanying drawing.

The cross-sectional structure schematic diagram of a kind of concrete-pouring template that Fig. 1 provides for the utility model;

Fig. 2 is shown in Fig. 1 in concrete-pouring template, and the permeable template edge exceeds the schematic diagram of steel form pre-set dimension;

Fig. 3 is during for a kind of concrete-pouring template concreting of using the utility model to provide, and the water and air in concrete drains into outside schematic diagram from concrete;

A kind of flow chart of making the method for concrete-pouring template that Fig. 4 provides for the utility model.

The specific embodiment

In the casting method of traditional concrete structure, due to after concreting, some air that template and concrete surface contact position exist or unnecessary water, and cause concrete surface to produce the diseases such as bubble, sand line, sand spot.For this problem, the application provides a kind of new technical scheme, by adopting a kind of special instrument (being permeable template) in the process in construction, thereby after concreting, empty G&W unnecessary in concrete can flow out by template, avoids concrete surface to produce the appearance of the diseases such as bubble, sand line, sand spot.

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.

The application provides a kind of concrete-pouring template, please refer to Fig. 1, is the cross-sectional structure schematic diagram of this concrete-pouring template, as shown in the figure:

This concrete-pouring template comprises steel form 11 and permeable template 12, wherein: described permeable template 12 is placed on the side of steel form 11 1 sides, described permeable template 12 obtains according to the size cutting of described steel form 11, described steel form pre-set dimension is given prominence at its edge, and, described permeable template 12 has sandwich construction, comprise 121, intermediate layer 122, top layer and adhesion layer 123, wherein, described adhesion layer 123 is for mutually bonding with described steel form 11, and 121He intermediate layer, described top layer 122 is connected by pore.

Described steel form pre-set dimension d is given prominence at described permeable template 12 edges, as shown in Figure 2.

After described concrete-pouring template is built to destination, carry out concreting, after building in casting process, under the actings in conjunction such as the capillarity of inside concrete pressure, permeable template cloth and shake tamper, the free moisture of bubble in concrete and part, and can be discharged by permeable template cloth to surface migration by inside concrete.Concrete, as shown in Figure 3, the free moisture of bubble and part is by inside concrete to surface migration, and the top layer 121 by permeable template 12 enters intermediate layer 122, bubble 122 rises and drains into outside from intermediate layer, water from intermediate layer 122 toward descending until flow out from template.

Can find out, utilize this concrete-pouring template to carry out concreting, at least there is effect:

1. can effectively reduce the concrete bubble of component surface, make concrete finer and close;

2. can make part moisture in concrete discharge and cement granules is stayed concrete surface, cause the concrete surface water-cement ratio of several millimeters deep significantly to reduce;

3. make component surface form the dense sclerosis layer that one deck is rich in hydrated calcium silicate, greatly improve concrete surface hardness, abrasion resistance, breaking resistance, do freezing property, concrete permeability, carbonation depth and chloride diffusion coefficient are also significantly reduced;

4. reduce the possibility of inside concrete and Office of Foreign Affairs's exchange material, thereby improved the durability of member;

5. the concrete permeable formwork cloth has equally distributed hole, and water can evenly be discharged through permeable template by infiltration and capillarity, does not form gathering, the generation of the concrete surface defects such as so effective minimizing sand spot, sand line.

6. the water retention of concrete permeable formwork cloth, for concrete curing provides a good condition, reduced the generation of micro-cracks.

Described permeable template cloth can hydrophilic composite fiber tissue, the terylene of high-hydrophilic for example, its top layer is bright and clean, fine and close, there is fine aperture, average pore size is 20-35 μ m, directly contact and can stop cement granules to pass through through water and air with concrete, its adhesion layer is flocked layer (being cashmere shape surface layer), thickness is 1～2.5mm approximately, intermediate layer can be the independent structure with a plurality of pores that are connected, can be also the part of flocked layer near top layer, have the performance that water conservation is ventilative, water retaining capacity be greater than 0.25L/m ², drainability is greater than 0.4L/m ², its effect is to retain suitable moisture, and unnecessary moisture oozes out, and gas appears, and makes concrete surface layer all the time in the middle of moist environment.

In certain embodiments, described intermediate layer can be honeycomb structure or hollow ball structure.

In certain embodiments, absorbent material can be mixed in described intermediate layer, such as super absorbent resin (main Types has polyacrylate, polyvinyl alcohol, acetate ethylene copolymer class, polyurethanes, PEO class etc.), to strengthen the water imbibition of template, thereby make the unnecessary moisture in concrete to discharge quickly.

It should be noted that, above-mentioned intermediate layer can retain certain moisture, and in the certain hour after concreting completes, (for example 7 days) carry out moisturizing to concrete surface layer, thereby play certain maintenance action.

This concrete-pouring template can be applied to the prevention of marine concrete structures such as harbour, mole, caisson, dock, slideway; The traffic engineering concrete structures such as Oversea bridge, tunnel, road, open caisson; The minor benefit concrete structures such as dykes and dams, water delivery culvert, overflow weir, and the important concrete structure such as nuclear power station, railway.

Please refer to Fig. 4, the flow chart for a kind of preparation method of above-mentioned concrete-pouring template comprises the following steps:

Step S41, provide steel form and permeable template cloth.

This permeable template cloth comprises top layer, intermediate layer and adhesion layer, and wherein, described top layer and intermediate layer are communicated with by pore.The structure of described permeable template cloth as mentioned before.

Step S42, clear up this steel form.

Foreign material on steel form, concrete, greasy dirt and rusty stain are removed, and dried after cleaning.

Step S43, cutting permeable template cloth.

By after the steel form horizontal positioned, according to described steel form size, cutting permeable template cloth, after cutting, described permeable template cloth exceeds described steel form edge preset size, for example 5～10cm.

Step S44, on described steel form surface and surrounding spraying (or brushing) one deck glue.

Can adopt air pump to be sprayed, when spraying glue, should guarantee that template surface is clean, dry, glue should spray evenly, not trickle.

Step S45, described permeable template cloth is adhered on the surface that described steel form scribbles glue, forms concrete-pouring template.

Adhesion layer is pasted to template, from centre to the surrounding compacting.Should uncover re-posted while gauffer occurring, guarantee that the permeable template cloth stickup is level and smooth, non-wrinkled and bubble.

Position to the needs splicing, two permeable template cloths are answered overlapping 3～5 centimetres, and then cut out and cut in the intermediate vertical of lap-joint with cut-off knife, take two small pieces that scale off away, carefully along junction toward pressing down, to guarantee that edge can join nattily, two permeable template cloths are docked fully, and seam is tightly smooth.Should be noted that in this process, avoid firmly involving taking redundance (i.e. two small pieces templates) away, to place the permeable template distortion, care should be used to ground is along junction toward pressing down, the a little glue of overbrushing, guaranteeing that both sides are smooth joins, and while avoiding building, concrete infiltrates from centre.

Should suitably increase glue-spread to template surrounding, splicing place and template tapping, in order to avoid concrete infiltrates between formwork cloth and template.

In addition, after template pastes, forbid to be placed under the sun and be exposed to the sun, the application waterproof cloth covers, and prevents because of the template deformation that is exposed to the sun, and formwork cloth comes unstuck and heaves or wrinkling; Forbid to trample on the formwork cloth surface posted.

It should be noted that, in this manual, each embodiment can supplement mutually, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.

In addition, also it should be noted that, in this article, relational terms such as the first and second grades only is used for an entity or operation are separated with another entity or operating space, and not necessarily requires or imply between these entities or operation the relation of any this reality or sequentially of existing.In addition, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make the process, method, article or the equipment that comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.In the situation that not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.

To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (3)

1. a concrete-pouring template, is characterized in that, comprising:

Steel form;

Be adhered to the permeable template of steel form one side side, described permeable template and described steel form size coupling, and this permeable template cloth comprises top layer, intermediate layer and adhesion layer, wherein, described top layer and intermediate layer are communicated with by pore.

2. concrete-pouring template according to claim 1, is characterized in that, the material of described permeable template cloth is terylene.

3. concrete-pouring template according to claim 1 and 2, is characterized in that, described intermediate layer is honeycomb structure.

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