CN105585266A - Organic composite fiber used for cement-based composite material and production method thereof - Google Patents
Organic composite fiber used for cement-based composite material and production method thereof Download PDFInfo
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- CN105585266A CN105585266A CN201410578048.0A CN201410578048A CN105585266A CN 105585266 A CN105585266 A CN 105585266A CN 201410578048 A CN201410578048 A CN 201410578048A CN 105585266 A CN105585266 A CN 105585266A
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Abstract
The invention discloses an organic composite fiber used for cement-based composite material and a production method thereof. To solve the problems in the prior art, fibers in different size and proportion are composited, wherein polypropylene fiber and polyvinyl alcohol fiber are added to the cement-based composite material so that advantages of the fibers are achieved, thereby enhancing the performance of concrete in different layer and different load-bearing stages.
Description
Technical field
The invention belongs to cement-base composite material organic synthetic fibers, relate to one and be applied to concreteIn effectively control the composite fibre of distress in concrete.
Background technology
The cement-base composite material such as conventional cement mortar, concrete tensile strength is low, fragility is large, in constructionEasily produce during one's term of military service cracking phenomena, in the time being subject to load, often present the fragility that collapses without sign simultaneouslyDestroy. At present, a lot of for the kinds of fibers of refinforced cement based composites, organic synthetic fibers is shouldBy a comparatively general class, comprise polypropylene fibre, vinal, nylon fiber, polyacrylonitrileThe synthetic fibers such as fiber, aramid fiber, polyethylene fibre.
A kind of organic synthetic fibers is incorporated in cement composite material, and organic synthetic fibers can stop materialThe generation in crack and development, and be conducive to the toughness of refinforced cement based composites, can improve water simultaneouslyThe tensile strength of cement-based composite material. Various organic synthetic fibers are being brought into play separately improving concrete performanceUnique effect, but also have many weak points simultaneously. In general, high-elastic modulus fibre is multiple to cement basedThe enhancing effect of condensation material is better; Low-elasticity-modulus fiber reinforcement effect is poor, but resistance to split effect better. WhereinPolypropylene fibre belongs to low-elasticity-modulus fiber, and vinal belongs to high-elastic modulus fibre. By gathering thirdAlkene fiber and vinal be the compound cement-base composite material that mixes by a certain percentage, improves cement based multipleThe application technology that condensation material cracking resistance is strengthened the property have not been reported.
Summary of the invention
The problem that the present invention exists in order to solve above-mentioned prior art, by the fiber of different size and ratioCompound, polypropylene fibre and vinal are mixed in cement-base composite material, display one's respective advantages,Strengthen concrete performance in different levels and load-bearing stage.
The present invention is formed by weight configuration by following synthetic fibers:
Polypropylene fibre 20wt%-80wt%, vinal 80wt%-20wt%.
In the present invention, the length of described polypropylene fibre is 5-20mm, diameter 5-100 μ m, fractureIntensity is greater than 280MPa, and initial modulus is greater than 3000MPa, and elongation at break is less than 40%.
In the present invention, the length of described vinal is 5-15mm, and diameter 5-100 μ m is disconnectedResistance to spalling is greater than 1000MPa, and initial modulus is greater than 20GPa, and elongation at break is less than 10%.
The present invention also provides a kind of production method of above-mentioned composite fibre, by above-mentioned mass percentPolypropylene fibre, vinal are thrown in mixer according to proportioning, add respectively fiber quality ratioThe dispersant uniform stirring of the size of 1wt% and 2wt% 3 minutes, then dry and bag distribution packaging.
The present invention compared with prior art has the following advantages: by polypropylene fibre and vinal twoPlant initial modulus, fracture strength, elongation at break, diameter, the different organic synthetic fibers of fusing pointCompounded fiber mixes in cement-base composite material, forms that compound resistance is split and enhancing system, both can send outWave the advantage of Single Fiber, can produce again the synergistic effect of two kinds of fiber composite, can realize polypropylene fibreDimension is controlled the effect in crack in early days, can realize again the work that vinal suppresses military service later stage, crack phaseWith. The present invention has made up the deficiency in single synthetic fibers different phase control crack, has improved cement based multipleCondensation material cracking resistance, reduces later maintenance expense, cost performance is high, has to promote in building tradeBe worth.
Detailed description of the invention
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, instituteThe embodiment describing is only the present invention's part embodiment, instead of whole embodiment. Based on thisEmbodiment in bright, those of ordinary skill in the art obtain under creative work prerequisite not makingEvery other embodiment, belongs to the scope of protection of the invention.
Preparation Example
Below in conjunction with embodiment, the present invention is further illustrated, and following each embodiment is only for illustrating thisThe technical scheme of invention, but to not restriction of the present invention.
Embodiment 1: polypropylene fibre 20wt%, length 19mm, vinal 80wt%, longDegree 12mm.
Its preparation method is: by the polypropylene fibre of above-mentioned mass percent and vinal according toProportioning is thrown in mixer, adds respectively fiber quality than the dispersant of the size of 1wt% and 2wt%Uniform stirring 3 minutes, then dry and bag distribution packaging finished product.
Embodiment 2: polypropylene fibre 40wt%, length 15mm, vinal 60wt%, longDegree 12mm.
Its preparation method is: by the polypropylene fibre of above-mentioned mass percent and vinal according toProportioning is thrown in mixer, adds respectively fiber quality than the dispersant of the size of 1wt% and 2wt%Uniform stirring 3 minutes, then dry and bag distribution packaging finished product.
Embodiment 3: polypropylene fibre 50wt%, length 12mm, vinal 50wt%, longDegree 6mm.
Its preparation method is: by the polypropylene fibre of above-mentioned mass percent and vinal according toProportioning is thrown in mixer, adds respectively fiber quality than the dispersant of the size of 1wt% and 2wt%Uniform stirring 3 minutes, then dry and bag distribution packaging finished product.
Embodiment 4: polypropylene fibre 60wt%, length 9mm, vinal 40wt%, longDegree 6mm.
Its preparation method is: by the polypropylene fibre of above-mentioned mass percent and vinal according toProportioning is thrown in mixer, adds respectively fiber quality than the dispersant of the size of 1wt% and 2wt%Uniform stirring 3 minutes, then dry and bag distribution packaging finished product.
Embodiment 5: polypropylene fibre 80wt%, length 6mm, vinal 20wt%, longDegree 12mm.
Its preparation method is: by the polypropylene fibre of above-mentioned mass percent and vinal according toProportioning is thrown in mixer, adds respectively fiber quality than the dispersant of the size of 1wt% and 2wt%Uniform stirring 3 minutes, then dry and bag distribution packaging finished product.
Effect embodiment
For verifying the early stage and later stage cracking resistance of cement-base composite material of the present invention, applicant is by rightThan singly mixing polypropylene fibre, singly mix vinal, mixing 20wt% polypropylene fibre and the poly-second of 80wt%Enol fiber, mix 80wt% polypropylene fibre and 20wt% vinal, mix 50wt% polypropylene fibrePeacekeeping 50wt% vinal, mix six kinds of 40wt% polypropylene fibre and 60wt% vinalsThe cracking resistance of dry contraction phase of the cracking resistance of group cement mortar plastic stage and cement concrete.Wherein the length of polypropylene fibre and vinal is 12mm. Specifically fill a prescription as table 1.
Table 1C30 fiber concrete match ratio (kg/m3)
The fiber prescription composition of table 2 embodiment of the present invention and comparative example
| Polypropylene fibre (wt%) | Vinal (wt%) | |
| Comparative formula 1 | 100 | 0 |
| Comparative formula 2 | 0 | 100 |
| Formula 1 | 20 | 80 |
| Formula 2 | 80 | 20 |
| Formula 3 | 50 | 50 |
| Formula 4 | 40 | 60 |
By each fiber prescription of table 2, add in the fiber concrete in table 1, the corresponding comparative example 1-2 that forms,Embodiment 1-3, and the crazing-resistance test of cement mortar plastic stage is according to CECS38:2004 " fiber coagulationSoil structure technical regulation " the inside " fiber concrete and Mortar shrinkage crack test method " implement, do" concrete durability design and construction refers to the cracking resistance test basis CCES01:2004 of dry contraction phaseSouth " propose " concrete be dried shrinkage cracking circle ring test method " enforcement, result of the test is as follows:
Table 3
Conclusion: referring to the experimental result of table 3, the mortar that mixes polypropylene fibre and vinal existsThe crack situation of dry contraction phase of plastic stage and later stage all has clear improvement, and therefore, uses at fiberIn the identical situation of total amount, mix after composite fibre in early days plastic stage and dry contraction phase in later stage allThere is superior cracking resistance, both made up the shortcoming of polypropylene fibre in later stage cracking resistance deficiency, simultaneouslySolve again the problem that vinal improves cracking DeGrain in early days, possessed two kinds of fibers and changingThe superior feature of kind different times cement-based material cracking, wherein fills a prescription 4 performances in every respect obviously moreFor outstanding.
Obviously, those skilled in the art can carry out various changes and modification and not depart from this applicationThe spirit and scope of application. Like this, if belonging to the application's right, these amendments of the application and modification wantAsk and the scope of equivalent technologies within, the application be also intended to comprise these change and modification interior.
Claims (5)
1. cement-base composite material strengthens an organic composite fiber by cracking resistance, comprises polypropylene fibreAnd vinal, wherein, the mass percent of described polypropylene fibre is20wt%-80wt%, the mass percent of described vinal is 80wt%-20wt%.
2. composite fibre as claimed in claim 1, is characterized in that: the length of described polypropylene fibreDegree is 5-20mm, diameter 5-100 μ m, and fracture strength is greater than 280MPa, initial modulusBe greater than 3000MPa, elongation at break is less than 40%.
3. composite fibre as claimed in claim 1, is characterized in that: described vinalLength is 5-15mm, diameter 5-100 μ m, and fracture strength is greater than 1000MPa, introductory dieAmount is greater than 20GPa, and elongation at break is less than 10%.
4. composite fibre as claimed in claim 1, is characterized in that: the matter of described polypropylene fibreAmount percentage is 40wt%-60wt%, and the mass percent of described vinal is60wt％-40wt％。
5. a production method for organic composite fiber as claimed in claim 1, comprising: by above-mentionedPolypropylene fibre, the vinal of mass percent are thrown in into mixer according to proportioningIn, add respectively fiber quality than the dispersant uniform stirring of the size of 1wt% and 2wt%3 minutes, then dry and bag distribution packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410578048.0A CN105585266A (en) | 2014-10-24 | 2014-10-24 | Organic composite fiber used for cement-based composite material and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410578048.0A CN105585266A (en) | 2014-10-24 | 2014-10-24 | Organic composite fiber used for cement-based composite material and production method thereof |
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| CN105585266A true CN105585266A (en) | 2016-05-18 |
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| CN201410578048.0A Pending CN105585266A (en) | 2014-10-24 | 2014-10-24 | Organic composite fiber used for cement-based composite material and production method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112958A (en) * | 2001-10-09 | 2003-04-18 | Taiheiyo Cement Corp | Method for producing explosion resistant high strength cement hardened body |
| JP2004026620A (en) * | 2002-06-28 | 2004-01-29 | Sumitomo Osaka Cement Co Ltd | High-strength fiber reinforced concrete |
| CN103664090A (en) * | 2013-12-19 | 2014-03-26 | 中国中材国际工程股份有限公司 | Fiber-hybrid high-ductility cement-based composite material and preparation method thereof |
| WO2014157548A1 (en) * | 2013-03-29 | 2014-10-02 | 株式会社クラレ | Reinforcing fiber for hydraulic molded articles, and hydraulic material containing said fiber |
-
2014
- 2014-10-24 CN CN201410578048.0A patent/CN105585266A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112958A (en) * | 2001-10-09 | 2003-04-18 | Taiheiyo Cement Corp | Method for producing explosion resistant high strength cement hardened body |
| JP2004026620A (en) * | 2002-06-28 | 2004-01-29 | Sumitomo Osaka Cement Co Ltd | High-strength fiber reinforced concrete |
| WO2014157548A1 (en) * | 2013-03-29 | 2014-10-02 | 株式会社クラレ | Reinforcing fiber for hydraulic molded articles, and hydraulic material containing said fiber |
| CN103664090A (en) * | 2013-12-19 | 2014-03-26 | 中国中材国际工程股份有限公司 | Fiber-hybrid high-ductility cement-based composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王高明等: "纤维混杂对水泥基材料力学性能以及抗裂性能的影响", 《混凝土世界》 * |
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Application publication date: 20160518 |
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