CN101684633A - Cement concrete runway surface of synthetic fibre for replacing steel fibre - Google Patents
Cement concrete runway surface of synthetic fibre for replacing steel fibre Download PDFInfo
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- CN101684633A CN101684633A CN200610157010A CN200610157010A CN101684633A CN 101684633 A CN101684633 A CN 101684633A CN 200610157010 A CN200610157010 A CN 200610157010A CN 200610157010 A CN200610157010 A CN 200610157010A CN 101684633 A CN101684633 A CN 101684633A
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- concrete
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- runway surface
- cement concrete
- steel fibre
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Abstract
The invention discloses a cement concrete runway surface of synthetic fibre for replacing steel fibre, i.e. polyvinyl alcohol fibre is added in concrete of the runway surface to replace the steel fibre. The cement concrete runway surface of synthetic fibre can not only improve the flexural strength, the flexural flexibility and the deformation performance of the concrete and obviously increase theflexural fatigue behavior, but also can effectively solve the problems of early stage plastic cracks, shrinkage cracks, air shrinkage cracks and the like of the concrete, plays a role of double effects of reinforcing and plasticizing, and also avoids the problems of caking, rusting and the like common in the steel fibre.
Description
[technical field]
The present invention relates to a kind of cement concrete runway surface, particularly a kind of synthetic fibers cement concrete runway surface that plays same purpose with steel fibre but be different from steel fibre that added.
[background technology]
In order to guarantee flight safety and normal the use, airfield pavement not only should have enough supporting capacitys, good fatigue behaviour, but also should have good resistance to weather, abrasion resistance, impact resistance, toughness, anti-contracility, crack resistance and etc. performance.Though it is big that cement concrete road surface has rigidity, the ability of diffusion wheel load is strong, advantages such as stability is better, but along with aviation industry develop rapidly and use shows, cement concrete road surface appears its weakness and deficiency day by day, at first show under the effect of wheel reloading, cement concrete flexural tensile strength and anti-fatigue performance are lower, next is that cement concrete is kind of a fragile material, stretcher strain during fracture is little, easily produce the crack, crack resistance and toughness are relatively poor, in case the crack occurs, very easily cause the fracture damage of face surface layer and lose supporting capacity, increased the maintenance workload of road face, there is anti-strip in cement concrete road surface simultaneously, shortcomings such as anti-fragmentation and anti-wear performance are lower.
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 the one-time investment of steel fibrous concrete road face engineering is higher by 15%～20% than similar cement concrete road surface usually, the large usage quantity of steel fibre in the steel fibrous concrete road face, and general volume is 60～100kg/m
3Road face cost height, be difficult for again during construction mixing and stirring, if the operation that adopts is improper, steel fibre also may produce clustering phenomena, if it is bad that road face facing surface is disposed, the corrosion of steel fibre easily takes place in the steel fibre exposed surface, influences the apparent of face after the corrosion, the steel fibre of exposed surface might be pricked the damage tire, thereby influences applying of steel fibrous concrete road face.
[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 runway surface of instead of steel fiber has promptly added vinal and has come the instead of steel fiber in road face surface concrete.
Synthetic fibers cement concrete runway surface of 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 conglomeration 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.
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.If this interface binding power is greater than the yield point of fiber, fiber will produce the necking phenomenon and refinement, and the interface bonding begins to destroy.In this case, the relativeness of extracting or destroy the insert depth (contact area) that depends on fiber and the destructive power of fiber own of fiber.So the interface binding power between the fracture of the intensity of cement based complex and toughness and fiber (tension) intensity, fiber and the matrix has very big relation.
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, a kind of synthetic fibers cement concrete runway surface of instead of steel fiber is characterized in that: added vinal and come the instead of steel fiber in road face surface concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610157010A CN101684633A (en) | 2006-11-20 | 2006-11-20 | Cement concrete runway surface of synthetic fibre for replacing steel fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610157010A CN101684633A (en) | 2006-11-20 | 2006-11-20 | Cement concrete runway surface of synthetic fibre for replacing steel fibre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101684633A true CN101684633A (en) | 2010-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610157010A Pending CN101684633A (en) | 2006-11-20 | 2006-11-20 | Cement concrete runway surface of synthetic fibre for replacing steel fibre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101684633A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106120512A (en) * | 2016-06-24 | 2016-11-16 | 谷建义 | The airfield runway structure of complex three-dimensional porous material and construction method thereof |
| CN113480255A (en) * | 2021-06-23 | 2021-10-08 | 中德新亚建筑材料有限公司 | High-strength high-ductility concrete |
-
2006
- 2006-11-20 CN CN200610157010A patent/CN101684633A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106120512A (en) * | 2016-06-24 | 2016-11-16 | 谷建义 | The airfield runway structure of complex three-dimensional porous material and construction method thereof |
| CN113480255A (en) * | 2021-06-23 | 2021-10-08 | 中德新亚建筑材料有限公司 | High-strength high-ductility concrete |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100331 |