CN110320078A - A kind of preparation method of carbon fiber mesh bond stress sample - Google Patents
A kind of preparation method of carbon fiber mesh bond stress sample Download PDFInfo
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- CN110320078A CN110320078A CN201910617171.1A CN201910617171A CN110320078A CN 110320078 A CN110320078 A CN 110320078A CN 201910617171 A CN201910617171 A CN 201910617171A CN 110320078 A CN110320078 A CN 110320078A
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- carbon fiber
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- bond stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
This application discloses a kind of preparation methods of carbon fiber mesh bond stress sample, which comprises the following steps: Concrete brick pretreatment；Carbon fiber mesh pretreatment；Mortar preparation；The preparation of bond stress sample；Maintenance processing.The bond stress sample and practice of construction situation compatible degree of method preparation of the invention are high, and reasonable in design, test data is accurate.
Description
Technical field
The present disclosure relates generally to building reinforcement technique field more particularly to a kind of systems of carbon fiber mesh bond stress sample
Preparation Method.
Background technique
In recent years, China has a large amount of house, road, bridge etc. to have reached the safe handling time limit, but does not reach
To the degree that must push over reconstruction, carrying out reinforcing and repairing to building is method the most cost-effective after its local failure.It is multiple
Condensation material has been widely used for reparation and the structure of modification of building, and fabric reinforced cement composite (FRCM) is a kind of special
Door is for building and the material of concrete reparation.
Carbon fiber mesh has the advantages that light and resistant to chemical etching, has with the compound obtained composite material of polymer mortar
Have excellent mechanical mechanics property, can by as a kind of high-intensity corrosion structural material applications in terms of building reinforcing.Carbon fiber
Grid and polymer mortar act synergistically, and constitute the sandwich structure of " polymer mortar/carbon fiber mesh/polymer mortar ",
There is " carbon fiber mesh/polymer mortar " interface, in FRCM system, polymer mortar and carbon fiber mesh in compound system
Between cementitiousness be known as polymer mortar-carbon fiber mesh bond stress.
The bond stress sample that carbon fibre fabric enhances cement-base composite material is laid in carbon fiber between two layers of mortar,
Whole system is " sandwich " plate hexahedron sample.Sample bond stress is measured by simple tension.
Existing test sample is contacted due to accommodating position with mortar, and the pressure between fixture easily causes the damage of sample end
It is bad, lead between institute measured data and actual samples that bond stress error is larger, the data of sample testing are inaccurate, therefore do not have authority
Property；Secondly, existing bond stress sample and practice of construction situation gap are larger, enhancing matrix cannot be reflected in sample, and is actually applied
Work situation compatible degree is not high.
Summary of the invention
In view of drawbacks described above in the prior art or deficiency, it is intended to provide a kind of high with practice of construction situation compatible degree, survey
Try the preparation method of the accurate carbon fiber mesh bond stress sample of data.
A kind of preparation method of carbon fiber mesh bond stress sample provided by the present application, comprising the following steps:
The Concrete brick of specification needed for testing is chosen in Concrete brick pretreatment, and Concrete brick area is maximum
Two faces polish using angle grinder coarse as test basal planes, then to the both ends of the surface of Concrete brick along its length into
Row polishing, makes its size match with detection device, with brush that the dust particles on Concrete brick surface are clear after polishing
Reason is clean, then, a stratum boundary surface adhesive is respectively coated on two test basal planes, is absorbed to interface bonding agent by test basal plane
Afterwards, it is coated with a stratum boundary surface adhesive；
Carbon fiber mesh pretreatment cuts the strip carbon fiber mesh of specification needed for testing as sample, carbon fibre web
The cutting length of lattice sample is greater than 4.9 times of test basal plane length, and carbon fiber mesh sample is fixed on to the platform of grid fixed station
On face, one layer of epoxy agent is coated in carbon fiber mesh specimen surface, after coating, extra epoxy agent is squeezed out, then
Carbon fiber mesh sample is put into baking oven, the epoxy agent baking and curing on its surface is made, it is spare after the completion；
Mortar preparation, the raw material of wet spraying polymer mortar are mixed with water in proportion, are stirred
It is spare afterwards；
The preparation of bond stress sample coats one layer of wet spraying polymer sand on one side test basal plane along its length
Slurry forms first layer mortar, by the one end of spare carbon fiber mesh sample along its length and first layer mortar along its length
One end alignment for spending direction, is then laid in the surface of first layer mortar, in the carbon fiber mesh sample of first layer mortar surface
One layer of wet spraying polymer mortar of upper coating forms second layer mortar, then, along its length by carbon fiber mesh sample
The other end be folded into another side test basal plane, repeat above-mentioned bond stress sample preparation, complete the entire of bond stress sample
Preparation process；
It is conserved a period of time after the completion of preparation of bond stress sample by maintenance processing under the conditions of fog room.
Preferably, the specification for the Concrete brick chosen in Concrete brick pre-treatment step is 20cm × 10cm × 6cm.
Preferably, the specification of the carbon fiber mesh sample in carbon fiber mesh pre-treatment step is 98cm × 6cm.
Preferably, the coating of the first layer mortar in bond stress sample preparation procedure is having a size of 15cm × 6cm × 0.5cm；
The coating of second layer mortar is having a size of 15cm × 6cm × 1cm.
Preferably, the curing time for conserving bond stress sample in processing step is 28 days.
In terms of existing technologies, the beneficial effect of the application is:
The preparation method of carbon fiber mesh bond stress sample of the invention, in Concrete brick two sides with mortar by carbon fiber
Dimension grid is anchored, high with the actual conditions fitness of construction site, can be good at reacting practice of construction situation；
Meanwhile preparing sample structure design rationally, by changing the surface structure of sample, in Concrete brick two sides benefit
Carbon fiber mesh is anchored with mortar, such sample forced position in test by original mortar reinforced sheet is changed to centre
Concrete brick stress, the position not engaged test fixture contacted between mortar and carbon fiber mesh improve roughing sand slurry and reinforce
The frangible phenomenon of piece effectively raises the accuracy of the bond stress test between carbon fiber mesh and polymer mortar.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is a kind of process signal of preparation method of carbon fiber mesh bond stress sample provided by the embodiments of the present application
Figure.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Referring to FIG. 1, being a kind of stream of the preparation method of carbon fiber mesh bond stress sample provided by the embodiments of the present application
Journey schematic diagram, comprising the following steps:
The pretreatment of S11 Concrete brick is chosen specification 20cm × 10cm × 6cm Concrete brick needed for testing, will be mixed
Solidifying maximum two faces of cob brick block area polish using angle grinder coarse as test basal plane, improve the viscous of test basal plane
Relay, then polish the both ends of the surface of Concrete brick along its length, so that its size is matched with detection device, has polished
Bi Hou is cleaned out the dust particles on Concrete brick surface with brush, then, is respectively coated one on two test basal planes
Stratum boundary surface adhesive is coated with one layer of interface bonding agent, guarantee test base after interface bonding agent is absorbed by test basal plane
Face is sufficiently infiltrated.
Select Concrete brick as test basal plane, so that the preparation of sample and the actual conditions fitness of construction site
Height can be good at reacting practice of construction situation.
The pretreatment of S12 carbon fiber mesh cuts the strip carbon fiber mesh of specification 98cm × 6cm needed for testing as examination
The length of sample, carbon fiber mesh sample is longer, by its both ends respectively when carrying out sample preparation on two test basal planes, its own bending
Influence of the elastic restoring force afterwards to sample preparation is smaller, and the cutting length of carbon fiber mesh sample is 4.9 times for testing basal plane length,
It is the minimum length for not generating materially affect to sample preparation, the cutting length of carbon fiber mesh sample should be not less than test basal plane length
4.9 times.It after carbon fiber mesh sample is cut, is fixed on the table top of grid fixed station, in carbon fiber mesh sample
Surface coats one layer of epoxy agent, after coating, the extra epoxy agent is squeezed out, then the carbon fiber mesh is tried
Sample is put into baking oven, makes the epoxy agent baking and curing on its surface, spare after the completion；
Carbon fiber surface is significantly improved after epoxy coating coating solidification and is caused since carbon fiber surface inertia is low
Carbon fiber bundle " successively flexible " the problem of, improve the adhesive property between fiber precursor.
The preparation of S13 mortar, the raw material of wet spraying polymer mortar are mixed with water in proportion, are sufficiently stirred
It is spare after even.
S14 bond stress sample preparation, one side test basal plane on coat along its length one layer of 15cm × 6cm ×
The wet spraying polymer mortar of 0.5cm forms first layer mortar, along its length by spare carbon fiber mesh sample
One end is aligned with the one end of first layer mortar along its length, is then laid in the surface of first layer mortar, in first layer sand
It starches and coats one layer of 15cm × 6cm × 1cm wet spraying polymer mortar on the carbon fiber mesh sample on surface, form the second layer
Then the other end of carbon fiber mesh sample along its length is folded into another side test basal plane, repeats above-mentioned hold by mortar
Power sample preparation is wrapped up in, the whole preparation process of bond stress sample is completed.
It prepares sample structure design rationally, by changing the surface structure of sample, utilizes sand in Concrete brick two sides
Slurry anchors carbon fiber mesh, and such sample forced position in test by original mortar reinforced sheet is changed to intermediate coagulation
Cob brick block stress, the position not engaged test fixture contacted between mortar and carbon fiber mesh improve the reinforcement of original sample mortar
The frangible phenomenon of piece effectively raises the accuracy of the bond stress test between carbon fiber mesh and polymer mortar.
S15 maintenance processing conserves it 28 days after the completion of the preparation of bond stress sample under the conditions of fog room.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Claims (5)
1. a kind of preparation method of carbon fiber mesh bond stress sample, which comprises the following steps:
The Concrete brick of specification needed for testing is chosen in Concrete brick pretreatment, and the Concrete brick area is maximum
Two faces polish using angle grinder coarse, then the both ends to the Concrete brick along its length as test basal plane
Face is polished, its size is made to match with detection device, after polishing, with brush by the powder on the Concrete brick surface
Dirt particle is cleaned out, and then, a stratum boundary surface adhesive is respectively coated on two test basal planes, to the interfacial bonding
After agent is absorbed by the test basal plane, it is coated with one layer of interface bonding agent；
Carbon fiber mesh pretreatment cuts the strip carbon fiber mesh of specification needed for testing as sample, carbon fiber mesh examination
The carbon fiber mesh sample is fixed on grid and fixed by the cutting length of sample not less than 4.9 times of the test basal plane length
On the table top of platform, one layer of epoxy agent is coated in the carbon fiber mesh specimen surface, after coating, by the extra ring
Oxygen reagent squeezes out, then the carbon fiber mesh sample is put into baking oven, makes the epoxy agent baking and curing on its surface, complete
At rear spare；
Mortar preparation, the raw material of wet spraying polymer mortar are mixed with water in proportion, stir standby
With；
The preparation of bond stress sample coats one layer of wet spraying polymer on the one side test basal plane along its length
Mortar forms first layer mortar, by the one end of the spare carbon fiber mesh sample along its length and the first layer
One end alignment of mortar along its length, is then laid in the surface of the first layer mortar, in the first layer mortar table
One layer of wet spraying polymer mortar is coated on the carbon fiber mesh sample in face, forms second layer mortar, it then, will
The other end of the carbon fiber mesh sample along its length, which is folded into, tests basal plane described in another side, repeat above-mentioned bond stress
Sample preparation completes the whole preparation process of bond stress sample；
It is conserved a period of time after the completion of bond stress sample preparation by maintenance processing under the conditions of fog room.
2. the preparation method of carbon fiber mesh bond stress sample according to claim 1, which is characterized in that the concrete
The specification for the Concrete brick chosen in brick pre-treatment step is 20cm × 10cm × 6cm.
3. the preparation method of carbon fiber mesh bond stress sample according to claim 2, which is characterized in that the carbon fiber
The specification of the carbon fiber mesh sample in grid pre-treatment step is 98cm × 6cm.
4. the preparation method of carbon fiber mesh bond stress sample according to claim 3, which is characterized in that the bond stress
The coating of the first layer mortar in sample preparation procedure is having a size of 15cm × 6cm × 0.5cm；The painting of the second layer mortar
It covers having a size of 15cm × 6cm × 1cm.
5. the preparation method of carbon fiber mesh bond stress sample according to claim 4, which is characterized in that at the maintenance
The curing time for managing bond stress sample described in step is 28 days.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910617171.1A CN110320078B (en) | 2019-07-10 | 2019-07-10 | Preparation method of carbon fiber grid bond stress sample |
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| CN201910617171.1A CN110320078B (en) | 2019-07-10 | 2019-07-10 | Preparation method of carbon fiber grid bond stress sample |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111484279A (en) * | 2020-04-23 | 2020-08-04 | 卡本科技集团股份有限公司 | Mechanical embedding structure of carbon fiber grids and polymer mortar |
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| GB1463040A (en) * | 1975-07-17 | 1977-02-02 | Innovationsteknik Inst Ab | Method of reinforcing mortar and concrete with steel fibres |
| CN101100905A (en) * | 2007-07-31 | 2008-01-09 | 上海维固工程实业有限公司 | Reinforcement method for concrete structure |
| JP2009228211A (en) * | 2008-03-19 | 2009-10-08 | Shinji Sugiyama | Mortar reinforcing construction method |
| JP2012006813A (en) * | 2010-06-28 | 2012-01-12 | Birudorando:Kk | Fiber reinforced cement mortar for spraying |
| JP2012233347A (en) * | 2011-05-02 | 2012-11-29 | Railway Technical Research Institute | Structure and method for integrating concrete structure with reinforced ground |
| CN102645383A (en) * | 2012-04-06 | 2012-08-22 | 中冶集团资源开发有限公司 | Method for measuring shear strength of discontinuous shear plane of rock by utilizing three-shaft compression |
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| WO2016187933A1 (en) * | 2015-05-26 | 2016-12-01 | 李殿义 | Cellular concrete structure having structure-reinforcing mesh member and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111484279A (en) * | 2020-04-23 | 2020-08-04 | 卡本科技集团股份有限公司 | Mechanical embedding structure of carbon fiber grids and polymer mortar |
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| CN110320078B (en) | 2022-07-12 |
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