CN201152020Y

CN201152020Y - Formwork lining cloth based on moisture preservation of cellulose base fiber

Info

Publication number: CN201152020Y
Application number: CNU2007200886268U
Authority: CN
Inventors: 何亮; 曾宪森; 王晓宇
Original assignee: WUHAN LAITAI TECHNOLOGY Co Ltd
Current assignee: WUHAN LAITAI TECHNOLOGY Co Ltd
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-11-19
Anticipated expiration: 2017-11-30

Abstract

The utility model elates to a formwork lapping cloth based on the fiber moisture of fibrin which is characterized in that the formwork lapping cloth has an integral structure consisting of a single fibrous layer (2), a synthetic fibrous layer (3) and a foundation layer (4); and the synthetic fibrous layer (3) is arranged between the single fibrous layer (2), the foundation layer (4) and the other side of the single fibrous layer (2) contacts concrete (1) and the other side of the foundation layer (4)is adhered to a construction formwork (5). Due to the formwork lapping cloth provided by the utility model, as air in a concrete structure and redundant water are removed, the interior compaction rate of the concrete is improved, thus greatly raising the anti-permeability, frost-resistance and compressive strength of the concrete structure. In addition, the water in the synthetic layer of the formwork lapping cloth continuously replenish the water required by the curing of the concrete, thus preventing dry shrinkage and a crackle during initial setting. Therefore, the durability and surface quality of the concrete is greatly improved under the effect of aspects.

Description

The template lining cloth of preserving moisture based on cellulose fibre

Technical field

The utility model relates to concrete pouring and uses the material field, particularly the template lining cloth of preserving moisture based on cellulose fibre.

Background technology

Fall far short in the projected life and the application life of concrete structure at present, had a strong impact on people's life, and society has been caused direct economic loss.One of reason is to be subjected to abominable natural environment influence, and effective supporting capacity of concrete structure reduces along with the continuity of time.

Facts have proved that concrete destruction at first from its surface, is inwardly progressively destroyed then, reach critical point after, structure is thoroughly destroyed and is terminated application life.And surface breakdown mainly is because there is surface blemishes in it in forming process, as the bubble pore, the sand line, honeycomb, pitted skin, crizzle, color is inconsistent, reveal muscle, run mould, the out-of-flatness of plate face, the truncation arrisdefect, lines are not clear, the slit interlayer, surface peeling etc. though these surface blemishes are not to occur simultaneously, and the concrete structure loss in application life appears also can aggravating in one of them or part. and the surface blemishes of existence is to improve by strengthening execution control a bit, as revealing muscle, run mould, the out-of-flatness of plate face, the truncation arrisdefect, lines are not clear, slit interlayer, surface peeling etc.Some then is that existing form of construction work is fundamentally insurmountable, as the bubble pore, and the sand line, honeycomb, pitted skin, crizzle, color is inconsistent etc.

People mainly delay to arrive the critical point of concrete destruction with the mode that improves intensity now; improve the concrete life-span indirectly; in construction now; we find to handle this class problem with the method through regular meeting; but this means exist difficulty of construction to increase and cost rises; and the concrete of same intensity, also fall far short its application life, fundamentally do not solve the problem that improves concrete life.

During situation that concrete durability is had relatively high expectations, people adopt the whole bag of tricks to improve the concrete surface quality of surface course in research constantly.As the thin beautiful plate method of cement sand plaster+paving plastic film method, cement sand plaster or wooden form+subsides, cement sand plaster+flooring leather method, punching block+plastic-blasting method, punching block+subsides PVC plate method and punching block+spraying etc.Structure surfacing, light that these methods are built, but all come with some shortcomings, big such as difficulty of construction, complex process, cost is high, and key is all can not be permeable, ventilative, for improving the not obviously effect of concrete durability and surface quality.

In major project, brought into use template lining technology now, as " band drain+filter cloth " type permeable template, " nonwoven template lining " type permeable template etc., template is lined with permeable preferably, gas permeability, after using the template lining, moisture content and a large amount of bubble unnecessary in the part hydration process in the concrete surface layer certain depth can be discharged, and can obviously improve the concrete surface layer performance.But this class technology has increased cost and difficulty of construction in work progress, the more important thing is: this technology does not solve concrete initial curing problem, under the big situation of particularly big at wind, maintenance moisturizing difficulty, building member, influences more serious.

Summary of the invention

The utility model provides a kind of template lining cloth of preserving moisture based on cellulose fibre, in order to solve in the concrete casting process, gets rid of gas and redundant moisture in the concrete component, thereby improves the surface property of concrete component; Simultaneously between curing time, can keep the suitable humidity of concrete surface, prevent its face crack, thereby improve the durability of concrete component.

The feature of described template lining cloth of preserving moisture based on cellulose fibre is: described template lining cloth is a kind of by single fibrage 2, the integrative-structure that mixed fiber layer 3 and base cloth layer 4 are formed; Wherein mixed fiber layer 3 is between single fibrage 2 and the base cloth layer 4; The another side of single fibrage 2 contacts with concrete 1, and the another side of base cloth layer 4 is bonding with template 5 with construction.

Described single fibrage 2 is 1.0-2.0dtex by fiber Denier, fibre length be 45-65mm polypropylene fibre constitute, its surface pore is 2～8 μ m.Described mixed fiber layer 3 is 2.0-3.5dtex by fiber Denier, and fibre length is the structure that the polypropylene fibre of 60-80mm mixes with cellulose fibre, and its surface pore is 50-90 μ m.Described base cloth layer 4 is screen cloths that a kind of polypropylene fibre is made, and its longitudinal strength is 600N, and transverse strength is 400N.

After adopting template lining cloth described in the utility model,, thereby improved the compaction rate of inside concrete, made concrete structure anti-permeability performance, anti-freezing property and compressive strength improve a lot owing to redundant moisture in air in the concrete structure and the construction is discharged from.When the moisture of inside concrete when the surface is mobile, driving inner cement granules outwards moves simultaneously, because the template lining cloth is to the barrier effect of cement granules, cement granules stops at concrete surface, finally formed concrete compacted zone, pernicious gas in the environment and moisture just are difficult to penetrate into inside concrete, and anti-carbonation properties and reinforcing bar stainless property etc. all is improved.During the concrete initial curing, required moisture when the water of the mixed fiber layer in the template lining cloth can constantly replenish concrete curing, thereby the drying shrinkage and the crackle that occur during initial set when avoiding.Through the acting in conjunction of several respects, concrete durability and surface quality just are greatly improved.

Description of drawings

Fig. 1 is the utility model structural profile schematic diagram

Fig. 2 is an example structure generalized section when being used for concrete construction.

The specific embodiment

Below in conjunction with Fig. 2, be described further in the face of the utility model from template lining cloth user.

1. the arrangement concrete construction is intended making it moulding with template 5 (wood, bamboo, steel), removes the foreign material on the template (wood, bamboo, steel).

2. check concrete construction and intend using template size, stay 50-150mm surplus cutting template lining by every limit according to formwork structure.

3. with spraying water soluble glue on the template 5 equably, the template lining cloth that cuts entirely is positioned on the template.

4. on template the template lining cloth is fixed, made template 5 and template lining cloth connect to one, fixture is decided on concrete template situation.

5. template and template lining cloth integrative-structure are undertaken by the existing technology of concrete construction.

Show that as Fig. 1 described moisture keeping template lining cloth based on cellulose fibre is made of three layers of non-weaving cloth structure with different performance.Single fibrage 2 structures of first floor are 1.0-2.0dtex by fiber Denier, and fibre length is that the polypropylene fibre of 45-65mm is made, and making the rear surface hole is 2-8 μ m, mainly realize the function that concrete is ventilative, permeable and stop cement granules to run off; Second layer mixed fiber layer 3 structures are mixed and made into by polypropylene fibre and cellulose fibre, the fiber Denier of polypropylene fibre is 2.0-3.5dtex, fibre length is 60-80mm, this layer hole is 50-90 μ m, and main realization is accelerated ventilative, the permeable function of concrete and realized concrete initial curing water conservation moisture-keeping functions; The 3rd layer of base cloth layer 4 structure are the screen cloth that polypropylene fibre is made.Two of the template lining cloth of preserving moisture based on cellulose fibre directly contact with template 5 with concrete 1 respectively.

Claims

1. template lining cloth of preserving moisture based on cellulose fibre, it is characterized in that: described template lining cloth is a kind of by single fibrage (2), the integrative-structure that mixed fiber layer (3) and base cloth layer (4) are formed; Wherein mixed fiber layer (3) is between single fibrage (2) and the base cloth layer (4); Another side concrete (1) contact of single fibrage (2), the another side of base cloth layer (4) is bonding with template (5) with construction.

2. template lining cloth of preserving moisture based on cellulose fibre according to claim 1 is characterized in that: described single fibrage (2) is 1.0-2.0dtex by fiber Denier, length be 45-65mm polypropylene fibre constitute, its surface pore is 2～8 μ m.

3. template lining cloth of preserving moisture according to claim 1 based on cellulose fibre, it is characterized in that: described mixed fiber layer (3) is a kind of to be 2.0-3.5dtex by fiber Denier, length is the structure that the polypropylene fibre of 60-80mm mixes with cellulose fibre, and its surface pore is 50-90 μ m.

4. template lining cloth of preserving moisture based on cellulose fibre according to claim 1 is characterized in that: described base cloth layer (4) is the screen cloth that a kind of polypropylene fibre is made, and its longitudinal strength is 600N, and transverse strength is 400N.