CN101182700A - Synthetic fiber cement concrete road surface replacing steel fibre - Google Patents
Synthetic fiber cement concrete road surface replacing steel fibre Download PDFInfo
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- CN101182700A CN101182700A CNA2006101569481A CN200610156948A CN101182700A CN 101182700 A CN101182700 A CN 101182700A CN A2006101569481 A CNA2006101569481 A CN A2006101569481A CN 200610156948 A CN200610156948 A CN 200610156948A CN 101182700 A CN101182700 A CN 101182700A
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- concrete
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- road surface
- steel fibre
- cement concrete
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Abstract
The invention discloses the synthetic fiber of a concrete road surface to replace the steel fiber, i.e. the polyvinyl alcohol fiber is added into the road surface concreter to replace the steel fiber. The invention can not only greatly promotes the bending resistance intensity, the bending resistance toughness, and the distortion resistance of the concrete, but also obviously promote the bending resistance fatigue performance of the concrete. Moreover, the invention can effectively settle the problems of the early plastic cracks, the shrinkage cracks, the dry shrinkage cracks, and so on with the concrete. Thus, the invention is provided with the effect of both the intensity promotion and the toughness promotion, and prevents the common problems of scattering, rusting and so on with the steel fiber.
Description
[technical field]
The present invention relates to a kind of cement concrete pavement, particularly a kind of synthetic fibers cement concrete pavement that plays same purpose with steel fibre but be different from steel fibre that added.
[background technology]
Cement concrete at home and abroad is widely used as the main construction material in the road pavement building engineering.But common cement concrete pavement is because of the characteristics of concrete material self, defective such as have that fragility is big, low, the easy shrinkage cracking of tension rupture strength, poor toughness, shock resistance are lower.Therefore improve rupture strength, the bent toughness of concrete road surface, solve concrete early stage cracking resistance problem, improve durability of structures and become the problem that engineering circle is extremely paid close attention to application life.The method that present people use always is to mix steel fibre in monolithic concrete entirely.
Steel fibre is very remarkable to the enhancing effect of concrete tensile strength, can prolong the fatigue life of cement concrete pavement, airfield pavement, but in concrete, all add steel fibre and improved construction costs greatly, also increased the imposed load of structure, also exist and mix and stir difficulty, influence the whole inhomogeneity problem of concrete material.
[summary of the invention]
The purpose of this invention is to provide a kind of new material that can more economical, more effectively improve concrete performance, further widened the material source of fibrous concrete.
A kind of synthetic fibers cement concrete pavement of instead of steel fiber has promptly added vinal and has come the instead of steel fiber in pavement concrete.
In the present invention, not only can increase substantially concrete flexural strength, flexural toughness and deformation performance, significantly improve concrete bending resistance fatigue behaviour, and can also solve problems such as concrete early-age plastic crack, shrinkage crack and shrinkage crack effectively, play and not only strengthen but also toughness reinforcing double effect, problem such as also avoid occurring the common dispersion of steel fibre and get rusty.
[specific embodiment]
Vinal not only has original effectiveness for reducing concrete early-age plastic shrinkage and drying shrinkage, plays the effect that steel fibre is difficult to play in concrete, and bending tensile strength and the toughness that improves road structure is also had significant effect.Polyvinyl alcohol has following characteristics:
1) because of polyvinyl alcohol belongs to organic fiber, so do not have the problem of getting rusty, the outward appearance grace.
2) proportion is 1/6 of steel fibre, and is in light weight, than being easier to transportation.Volume is 9～20kg/m3, neither can increase the deadweight of structure, also can not increase the cost of engineering too much.
3) expose vinal on the sprayed mortar surface, also do not worry during constructor's operation being stung.
4) even resilience flies on the scope of operation during spraying operation, can not hurt operator and heavy vehicle, so safety is than higher yet.
When 5) being used for the building concrete floor, build low weightly, smearing with trowel does not almost have later projection.
6) good dispersion property of polyvinyl alcohol in cement concrete, mixing time can fully evenly be disperseed in maximum 180 seconds.
Now the mechanism of action that cement concrete performance improves is made elaboration with regard to this fiber:
Fragility complex with discontinuous short fiber strengthens, when destroying appears in the effect of suffered external force, destroy the two kinds of forms that show as: fiber extract fracture with fiber.Cement-based material is when being subjected to independent tension, if pulling force is less, matrix just shows to such an extent that resemble elastic body.When suffered pulling force was big, matrix will produce the crack, and this moment, matrix resembled the ductility body, and pulling force passes to fiber by matrix.When external force acts on the fibrous concrete complex, when cement matrix produces the crack, if the interface binding power between fiber and matrix is less than the elasticity critical stress of fiber, fiber was just extracted in the time spent of doing that is not subjected to stress as yet, and at this moment fiber can not play humidification.
Embodiment 1: add this fiber and can improve concrete residual strength.With respect to volume content of steel fibers is 54.6 kilograms/cube concrete (aggregate size is respectively 16mm and 8mm), and the Concretepower fibers content is that the concrete residual strength of 9.2 kilograms/cube and 19.5 kilograms/cube improves 4.5% and 53% respectively.
Embodiment 2: add this fiber and can improve concrete toughness effectively.With respect to volume content of steel fibers is 54.6 kilograms/cube concrete (aggregate size is respectively 16mm and 8mm), and the Concretepower fibers content is that 9.2 kilograms/cube concrete toughness index I5, I10, I20 improves 31.7%, 25.9% and 21.2% respectively; Volume is 19.5 a kilograms/cubic inch, and I5, I10, I20 improve 43.9%, 43.5% and 117% respectively.
Embodiment 3: add this fiber and can improve Fracture energy of concrete greatly.With respect to volume content of steel fibers is 54.6 kilograms/cube concrete (aggregate size is respectively 16mm and 8mm), and the Concretepower fibers content is that the Fracture energy of concrete of 9.2 kilograms/cube and 19.5 kilograms/cube improves 6.2% and 87.7% (crack width is 25um) respectively;-10.7% and 77%.(crack width is 100um).
Claims (1)
1. the synthetic fibers cement concrete pavement of an instead of steel fiber has promptly added vinal and has come the instead of steel fiber in pavement concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101569481A CN101182700A (en) | 2006-11-14 | 2006-11-14 | Synthetic fiber cement concrete road surface replacing steel fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101569481A CN101182700A (en) | 2006-11-14 | 2006-11-14 | Synthetic fiber cement concrete road surface replacing steel fibre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101182700A true CN101182700A (en) | 2008-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101569481A Pending CN101182700A (en) | 2006-11-14 | 2006-11-14 | Synthetic fiber cement concrete road surface replacing steel fibre |
Country Status (1)
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| CN (1) | CN101182700A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| CN103304206A (en) * | 2013-06-28 | 2013-09-18 | 深圳大学 | Ultrahigh-strength self-compacting concrete and preparation method thereof |
| CN105174763A (en) * | 2015-10-22 | 2015-12-23 | 北京工业大学 | Environment-friendly regenerated synthetic fiber reinforced concrete used for pavements, bridge decks and industrial terraces |
| CN107117912A (en) * | 2017-05-08 | 2017-09-01 | 北京工业大学 | Fiber concrete, preparation and application that a kind of airfield pavement is quickly repaired |
| CN112521086A (en) * | 2020-12-05 | 2021-03-19 | 中建西部建设贵州有限公司 | Impact-resistant wear-resistant airport pavement fiber concrete and preparation method thereof |
-
2006
- 2006-11-14 CN CNA2006101569481A patent/CN101182700A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886360A (en) * | 2009-05-14 | 2010-11-17 | 深圳市海川实业股份有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| CN101886360B (en) * | 2009-05-14 | 2014-08-27 | 深圳海川新材料科技有限公司 | Continuous reinforced concrete pavement structure and construction method thereof |
| CN103304206A (en) * | 2013-06-28 | 2013-09-18 | 深圳大学 | Ultrahigh-strength self-compacting concrete and preparation method thereof |
| CN105174763A (en) * | 2015-10-22 | 2015-12-23 | 北京工业大学 | Environment-friendly regenerated synthetic fiber reinforced concrete used for pavements, bridge decks and industrial terraces |
| CN105174763B (en) * | 2015-10-22 | 2017-06-16 | 北京工业大学 | A kind of environmentally friendly regeneration synthetic fibers for road face, bridge floor and industry ground slab strengthen concrete |
| CN107117912A (en) * | 2017-05-08 | 2017-09-01 | 北京工业大学 | Fiber concrete, preparation and application that a kind of airfield pavement is quickly repaired |
| CN112521086A (en) * | 2020-12-05 | 2021-03-19 | 中建西部建设贵州有限公司 | Impact-resistant wear-resistant airport pavement fiber concrete and preparation method thereof |
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Open date: 20080521 |