CN2760027Y

CN2760027Y - A structure of polymer synthetic fiber for concrete

Info

Publication number: CN2760027Y
Application number: CNU2004200422289U
Authority: CN
Inventors: 张洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-23
Filing date: 2004-07-23
Publication date: 2006-02-22
Anticipated expiration: 2014-07-23

Abstract

The utility model relates to a structure of polymer synthetic fibers for concrete. The utility model is characterized in that the utility model is formed by compounding a reticular fiber and a single fiber, and the mixed weight ratio of the reticular fiber and the single fiber is respectively from 6 to 12 percent and from 88 to 94 percent. A complementary composite reinforced rib fiber of the utility model is composed of the reticular fiber and the single fiber. The reticular fiber mainly solves the problems of crack resistance, impermeability and wear resistance in the concrete reinforced rib systems because of a small diameter and a rectangular cross-section; the single fiber is mainly used for reinforcing the anti-compression strength, the anti-impact capability and the anti-fold capability of the concrete because of a large diameter, a spiral body and strong bondability. The reticular fiber is organically matched with the single fiber to form a concrete fibrous reinforced system. Thus, the made-up concrete articles are ensured to become three-high concrete construction engineering with high quality, high performance and high technology.

Description

A kind of concrete structure of polymer synthetic fiber

Art

The invention belongs to the structure of adding stiffening web in the concrete and preparation method's improvement.

Technical background

People are through a large amount of studies have shown that, the an amount of monfil that adds helps to suppress the concrete shrinkage be full of cracks in concrete, improve concrete tenacity and ductility and impermeability, strengthen concrete shock resistance and wear resistance, prevent the corrosion of concrete reinforcement, prolong concrete work-ing life.What use the earliest is steel wire fibre, adopts polymer synthetic fiber afterwards again.Steel fiber is as the concrete stiffening web, have pavement performances such as high strength, the high elasticity of flexure, high orientation, but steel fiber and concrete adhesion property is relatively poor, bond stress is lower, the more important thing is corrosion-resistant, the coefficient of wear that adds metal is less than concrete, thereby behind road wear, make a large amount of steel wire fibres expose (being the spur phenomenon), very harmful to the wearing and tearing of wheel; The material cost of steel wire fibre and transportation cost are relatively more expensive in addition, and its application in concrete is obstructed.The appearance of polymer synthetic fiber makes fiber obtain greatly development in concrete application.(Chinese patent: 99256121.3) having solved polymer fiber can't equally distributed problem when concrete stirs for reticulin fiber silk structure.Monfil silk structure (Chinese patent: 01246987.4) overcome defectives such as steel fiber corrosion, poor adhesion, stirring technique complexity; Obtained using widely.Yet polymer synthetic fiber is the instead of steel fiber fully, as some rigidity indexs such as concrete ultimate compression strength, anti-impact forces, still can't break through the leadership of steel fiber.So, how to research and develop the advantage that advantage that a kind of new polymers synthon can have steel fiber comprehensively possesses polymer fiber again, promptly get the length of steel fiber, the concrete polymer fiber of mending the weak point of steel fiber is the focus that people study.

Summary of the invention

The purpose of this utility model is the polymer synthetic fiber that a kind of concrete of design is used, and makes it be used for concrete by instead of steel silky fibre, has the advantage of polymer fiber again.

The utility model is to realize by following technical scheme.The polymer synthetic fiber that a kind of concrete is used, characteristics of the present utility model are to be composited with reticulin fiber and monfil, and the two blended weight ratio is respectively 6-12% and 88-94%.Characteristics of the present utility model also are, described reticulin fiber be the sheet polymeric material upper edge of long 40-64mm, wide 5mm-35mm fiber parallel longitudinal cut some joint-cuttings, plates are become some filamentary aggregates that are arranged in parallel, and plates are thick to be 0.05mm-0.1mm; Described monfil is many spirrillum boundlings, and its single diameter of section is 0.3mm-0.8mm, length 40-60mm.Characteristics of the present utility model also have, and complete joint-cutting length is 9-15mm on the plates of described reticulin fiber, and the lateral separation is 0.6-1.0mm; The diameter of described monfil spirrillum boundling is 3mm-8mm, and the helicity of every bundle is 320 °-540 °, and the monfil quantity of every bundle is the 30-50 root.Wherein the helicity of You Huaing is 360 °-520 °.

Conjugated fibre described in the utility model when forming product, the whole bag packaging that is mixed in proportion for reticulin fiber plates and monfil spirrillum boundling.This helps when mixing stirring, and two kinds of fibers can be evenly dispersed and progressively separate, thereby reduces or stop the generation of wrapping phenomena.Described conjugated fibre adopts the degradable paper bag packing when commodity form.This not only is beneficial to transportation and quantitatively feeds intake, and more helps avoiding wrapping phenomena to take place, and need not during input to open the package, and packing bag will be become fiber yarn by tearing when stirring.

Conjugated fibre described in the utility model is as the volume volume of concrete fiber reinforced material, and recommendation is 1.8～4.5 kilograms/cubic metre.Its volume also is one of feature of the application, because volume is too little, does not have enough booster actions, and volume is too big, and except that cost was too high, its booster action was also obvious inadequately.

According to conjugated fibre described in the utility model, after being dropped into concrete mixer, along with concrete stirring, the spirrillum boundling of the plates of reticulin fiber and monfil is easy to by uniform distribution, is called for the first time to distribute; Along with the process that stirs, two kinds of fibers are subjected to the continuous impact of cement, sandstone material, reticulin fiber is by horizontal open, open reticulin fiber can be wrapped up by mortar, become independently fiber yarn by tearing afterwards, be uniformly distributed in the concrete, monfil spirrillum boundling can be dispersed as independently single thread spiral fiber by the sandstone slurry in stirring, and be uniformly distributed in the concrete with three dimensional constitution, be called for the second time and distribute.Therefore structure of the present utility model makes it have the effect of twice distribution when the system concrete.

The concrete of the utility model design has the following advantages with conjugated fibre.

1. reticulin fiber and monfil are formed the compound stiffening web fiber of a kind of complementary.Reticulin fiber since its diameter thin, the cross section is rectangular, in concrete stiffening web system, mainly solve freedom from cracking, impervious, resistance to wear; Monfil has stronger bond stress because its diameter is thick, shape body in the shape of a spiral, is mainly used in to strengthen concrete ultimate compression strength, shock resistance, flexural capacity.The organic cooperation in concrete of reticulin fiber and monfil has formed concrete fiber strengthening system.Thereby guarantee made concrete product become have high-quality, high-performance, three high concrete construction works of hi-tech.

2. the square-section of reticulin fiber and non-smooth surface make it have very high bond stress in concrete, in concrete stiffening web system, mainly bear concrete microcosmic and strengthen, and are also referred to as less important reinforcement.(as: crack that concrete shrinkage forms etc.).The thick diameter of monfil, spirrillum are born concrete macroscopic view and are strengthened in concrete stiffening web system, promptly be the reinforcement main body (as: concrete is subjected to the impact of external force, loaded vehicle axial compression, weight bump etc.) of stiffening web.

3. in the conjugated fibre stiffening web, the fiber yarn structure of reticulin fiber adopts the thick sheet polymer material of 0.05-0.1mm to make, and complete joint-cutting is regularly and is interspersed.And the structure of monfil is well-designed forming, and except diameter, length are improved, and twists into the pencil body that diameter is 3-8mm with 30～50 monofilament; After the dispersion, independent monofilament is the shape structure in the shape of a spiral; The uniform distribution first time when pencil body mainly solves fiber and stirs in concrete; Helicoidal structure has the stereo multi-dimensinal ability to bear in concrete, have more excellent design than the folk prescription of prior art to ability to bear, and have the advantage of steel fiber fully.Therefore it can resist strong external impacts as steel fiber, has the such higher modulus of elasticity of polymer fiber again.

4. described conjugated fibre mixing in concrete improved concrete ultimate compression strength, bending strength, shock resistance greatly, and reduced concrete residual intensity.Under equal fiber volume volume, add described conjugated fibre than adding steel fiber, concrete ultimate compression strength improves 11%, and bending strength improves 5%, and shock resistance improves 50%, and residual intensity has reduced by 25%.Therefore can reach a conclusion: adopt the designed conjugated fibre stiffening web of the application, instead of steel fiber fully not only, and on the parameters index, also improve a lot.And polymer fiber has that volume is light, convenient transportation, use are very simple, the design that need not to change former concrete mixture, need not to add any auxiliary facility.Be a kind of raising concrete strength and structure enhanced assist measure, can prevent plasticity and sedimentation shrinkage crack prior to the concrete initial set generation, reducing the contraction of maturing cracks, improve concrete resistance to impact shock greatly, improve bending resistance, antifatigue, anti-permeability performance, and can improve antiwear property and toughness and weather resistance.

Accompanying drawing and explanation thereof

Accompanying drawing 1 be reticulin fiber of the present utility model the structural representation of body in the form of sheets, accompanying drawing 2 is formed cancellated synoptic diagram for plates among Fig. 1 by horizontal open, 1 is (polymeric material) plates among the figure, and 2 is joint-cutting, and 3 are (plates are cut back formation) reticulin fiber.

Accompanying drawing 3 be monfil of the present utility model the structural representation of shape boundling in the shape of a spiral, accompanying drawing 4 is become the independently synoptic diagram of monfil for spirrillum boundling among Fig. 3 after breaking.

Embodiment

Because the application's narration to technical scheme in aforementioned is comparatively detailed, so add a supplementary explanation below in conjunction with the enforcement of accompanying drawing to technical scheme.

The compositely proportional of reticulin fiber that the utility model requires and monfil, should in described scope, adjust according to the construction object, in general, preparation contains big aggregate (stone) sandstone starches when laying thicker concrete, and wherein the monfil ratio should be more greatly; And preparation is when containing ossiculum material mortar and laying thin concrete, and reticulin fiber ratio wherein should be more greatly.And the length dimension adjustment of reticulin fiber and monfil is also identical therewith, should grow during Concrete Thick, and is then short when thin.

The shape of monfil is the application's proprietary design.Fig. 4 shows the shape of separate single silky fibre.Its helicity is designed to, 320 °～540 ° of specification length internal rotation.The requirement of swing is to guarantee that finished product has good Young's modulus when having stronger resistance to compression, anti-folding, impact resistance.Swing is not enough, and it is poor that the springform of silk is measured; Swing is excessive, and the resistance to compression of silk, anti-folding, shock resistance weaken, and fiber yarn easily twines conglomeration when concrete stirs simultaneously, and produces the phenomenon of not opening.Fig. 3 shows the spirrillum boundling of monfil.Its elasticity is designed to 60～80%, thereby guarantees silk when concrete stirs, and can finish (fag end) and distribute for the first time, can be broken at an easy rate again simultaneously, realizes that distribute the filametntary second time.

Claims

1, a kind of concrete polymer synthetic fiber is characterized in that, is to be composited with reticulin fiber and monfil; Described reticulin fiber be the sheet polymeric material upper edge of long 40-64mm, wide 5mm-35mm fiber parallel longitudinal cut some joint-cuttings, plates are become some filamentary aggregates that are arranged in parallel, plates are thick to be 0.05mm-0.1mm; Described monfil is many spirrillum boundlings, and its single diameter of section is 0.3mm-0.8mm, length 40-60mm.

2, fiber according to claim 1 is characterized in that, complete joint-cutting length is 9-15mm on the plates of described reticulin fiber, and the lateral separation is 0.6-1.0mm; The diameter of described monfil spirrillum boundling is 3mm-8mm, and the helicity of every bundle is 320 °-540 °, and the monfil quantity of every bundle is the 30-50 root.