CN107449666A - A kind of stretching test method of anchoring fibre reinforced composites - Google Patents
A kind of stretching test method of anchoring fibre reinforced composites Download PDFInfo
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- CN107449666A CN107449666A CN201710629550.3A CN201710629550A CN107449666A CN 107449666 A CN107449666 A CN 107449666A CN 201710629550 A CN201710629550 A CN 201710629550A CN 107449666 A CN107449666 A CN 107449666A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
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Abstract
The present invention provides a kind of stretching test method of anchoring fibre reinforced composites, is anchored using epoxy resin mortar.Mortar is made up of the raw material of following parts by weight：100~150 parts of epoxy resin, 15~25 parts of ethylenediamine, 15~25 parts of dibutyl phthalate, 20~30 parts of acetone, 200~280 parts of cement, 500~600 parts of sand.Anchoring is that rod member retained part is handled using the epoxy resin mortar with high compressive strength and high bond strength of appropriate match ratio and blending craft to the treatment technology of rod member retained part with the tension test of fibre reinforced composites, when the rod member is done tension test, ensure that tension failure occurs in the gauge length of test specimen to be destroyed, and avoids the slippage and destruction of tension failure front jig retained part.Step is simple and convenient to operate, is practical.
Description
Technical field
The invention belongs to building material field, more particularly to a kind of tension test side of anchoring fibre reinforced composites
Method.
Background technology
Tensile property is the main performance of fibre reinforced composites, and anchoring is a kind of high drawing with fibre reinforced composites
The material of intensity (up to 1000MPa) and high tensile modulus of elasticity (up to 50GPa) is stretched, is drawn according to existing fibre reinforced materials
Stretch method for testing performance such as GB/T1447-2005《Fibre reinforced materials Erichsen test method》、GB/T13096-2008《Draw
Squeeze fiberglass-reinforced plastic lever mechanical test method》The methods of tested, easily there is problems with：1st, fixture clamps
Power deficiency, it is too big that rod member slips 2, fixture chucking power from fixture, rod member guage section tension failure destruction front clamp part quilt
Fixture extruding is broken, and can produce obvious end effect, causes specimen holder end root to produce serious stress concentration so that
Test data is relatively low, data discrete is big, it is impossible to really reflects properties of product, has a strong impact on the judgement to properties of product.
On the other hand, field China wait on《A kind of improved glass fibre anchor pole tension test model》Research resin is respectively adopted
Glass fibre anchor pole tension test has been carried out with two kinds of Anchor Agents of cement mortar, but the two all has that success rate is not high to ask
Topic.
The content of the invention
In order to overcome above-mentioned deficiency, the present invention provides a kind of tension test of fibre reinforced composites anchoring asphalt mixtures modified by epoxy resin
Fat mortar.Anchoring is to use suitably to match somebody with somebody to the treatment technology of rod member retained part with the tension test of fibre reinforced composites
Composition and division in a proportion and blending craft have the epoxy resin mortar of high compressive strength and high bond strength to rod member retained part at
Reason, when the rod member is done tension test, ensure that tension failure occurs in the gauge length of test specimen to be destroyed, and avoids tension failure front jig
The slippage and destruction of retained part.Reliability of the present invention is high, and success rate is up to more than 99%.
To achieve these goals, the present invention adopts the following technical scheme that：
The tension test of a kind of fibre reinforced composites anchoring epoxy resin mortar, by the raw material group of following parts by weight
Into：100~150 parts of epoxy resin, 15~25 parts of ethylenediamine, 15~25 parts of dibutyl phthalate, 20~30 parts of acetone, water
200~280 parts of mud, 500~600 parts of sand.
Existing epoxy resin Anchor Agent and cement mortar due to solidification intensity deficiency or poor toughness, it is easy to crack the problems such as,
The phenomenon pulled occurs in tension test.In order to probe into the reason for phenomenon occurs is pulled, the application system research anchoring
Influence of the intensity to anchor pole steadiness in drawing process after the bonding characteristic of medium and hardening, and by large scale experiment to anchoring
Medium is screened, and is chanced on：When being irrigated using the epoxy resin mortar of the present invention to anchor pole, because its is less solid
Change shrinkage factor and excellent adhesive property, axial friction and anti-shearing force that anchoring medium is shown in anchor pole, and can be increased
Infringement of the shrinkage stress to injecting paste material in fixed, drawing process is effectively reduced, anchor pole in tension test is effectively prevent and pulls
The generation of phenomenon.
Preferably, it is made up of the raw material of following parts by weight：100~125 parts of epoxy resin, 15~20 parts of ethylenediamine, adjacent benzene
15~20 parts of dibutyl carboxylic acid, 20~25 parts of acetone, 200~240 parts of cement, 500~550 parts of sand.
Preferably, it is made up of the raw material of following parts by weight：125~150 parts of epoxy resin, 20~25 parts of ethylenediamine, adjacent benzene
20~25 parts of dibutyl carboxylic acid, 20~30 parts of acetone, 200~280 parts of cement, 500~600 parts of sand.
Preferably, the sand is natural river sand.Natural river sand, which adds, can not only reduce the dosage of epoxy resin, can be with
The contraction of volume after reduction epoxy resin cure；It is favorably improved the pressure-proof elasticity modulus and impact resistance of grouting material.
Preferably, if anchor pole differs 12~18mm with the diameter of steel pipe, in order to ensure that slurries fully, uniformly irrigate, with
And enough adhesion strengths, the particle diameter of currently preferred sand is 0.2~5mm, and when sand grains footpath is more than 5mm, slurries are in steel pipe
In skewness, when sand grains particle diameter is less than 0.2mm, pulp strength decline it is larger, easily there is the separation of slurry and aggregate.
Because the present invention is that consolidation by grouting is carried out in narrow pipeline, in order to obtain expected cure shrinkage and bonding
Performance, the present invention has particular/special requirement to the ratio of epoxy resin and filler (cement and sand), if the matter of epoxy resin and filler
For amount than being less than 4.6, the toughness of slurry is poor, easy to crack, if the mass ratio of epoxy resin and filler is more than 8.8, the solidification of slurry
Intensity declines, and anchor pole easily slips in drawing process.
Preparation present invention also offers a kind of tension test of fibre reinforced composites with anchoring epoxy resin mortar
Method, including：
Dry sand is uniform with cement mixing, obtain cement mortar；
Epoxy resin is well mixed with dibutyl phthalate, acetone, ethylenediamine, forms epoxy resin base fluid；
The cement mortar is well mixed with epoxy resin base fluid, obtains epoxy resin mortar.
Preferably, the specific preparation method of the cement mortar is：By the sand that particle diameter is 0.2~5.0mm (or crossing 5mm sieves)
Son is put into 105 DEG C of baking oven and dried, and weighs the sand after appropriate 425R cement and the drying in proportion, is mixed and stirred for uniformly
It is stand-by.
Preferably, the specific preparation method of the epoxy resin base fluid is：Weigh appropriate epoxy resin and be heated to 60 DEG C
Afterwards, it is proportionally added into dibutylester and acetone is mixed thoroughly, be eventually adding ethylenediamine, epoxy resin base fluid is formed after mixing thoroughly.
Preferably, the dosage of the raw material is as follows：100~150 parts of epoxy resin, 15~25 parts of ethylenediamine, O-phthalic
15~25 parts of dibutyl phthalate, 20~30 parts of acetone, 200~280 parts of cement, 500~600 parts of sand.
Present invention also offers epoxy resin mortar prepared by any above method.
Present invention also offers any above-mentioned epoxy resin mortar answering in the tension test of fibre reinforced composites
With.
Beneficial effects of the present invention
(1) each formulation material of epoxy resin mortar of the present invention is commercially readily available, cheap, once tests (5
Individual test specimen) the total dosage 4kg of compound or so, cost is very low, and detection cycle is short (48h), simple to operate, reliable, and detection data are accurate
Really, good application effect is achieved in long-term experiment work.
(2) preparation method of the present invention is simple, detection efficiency is high, practical, easy to spread.
Brief description of the drawings
Fig. 1 is the outline drawing of tensile test specimen；
Wherein, L- piece lengths；B- specimen widths；H- specimen thickness；Lo- length of steel pipe：Le- gauge length segment length；Ls- mistakes
Cross section.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
Embodiment 1
The present invention proposes a kind of stretching test method of concrete anchoring fibre reinforced composites.
First, the selection of specimen size
The Specimen Shape of tension test should meet generally acknowledged general requirement；In the specimen equidistance line marking section of measurement stress and strain
On, there should be uniform stress state；Destruction should occur in the gauge length of test specimen.The material of measure static strength, test data in short-term
Dispersion, the consumption of material and test specimen manufacturing expense, all be evaluation Specimen Shape select whether correct foundation.
Concrete anchoring three parts of fibrous composite tensile sample point, i.e. a guage section, two changeover portions and two
Individual loaded segment.Deformation is measured in sample marking distance section, and stress is calculated by its physical dimension and load capacity；Changeover portion is used for reducing
The stress interference (end effect) of pass is loaded with sample holder and outside；Loading zone is used as clamping sample on testing machine, bears to draw
Stretch load and pass it in sample marking distance section.Because high intensity, high modulus fibre composite have high anisotropy, surveying
When determining elastic constant and intensity, their requirements to stress uniform state are different, therefore typically use sample of different shapes
Studied.Wherein vertical bar type specimen shape is simple, easy to process, can determine tensile strength simultaneously on a sample, draw
Vertical bar type sample is selected when stretching modulus, therefore high intensity, high modulus fibre composite being tested.
This method selection sample dimensions for：Test specimen total length L -700mm；Width b-15mm；Thickness h -3~5mm；Gauge length
Le-100mm；Fixture gripping section is respectively 25mm.
2nd, the preparation of tensile test specimen
Concrete anchoring is carried out with the fixture retained part of fibre reinforced composites tension test test specimen using following technology
Processing：
1st, the match ratio of epoxy resin mortar
2nd, the blending craft of epoxy resin mortar：
The sand that particle diameter is 0.2~5.0mm (or crossing 5mm sieves) is put into after being dried in 105 DEG C of baking oven, weighed in proportion
Sand after appropriate 425R cement and the drying, it is mixed and stirred for uniformly stand-by.
Weigh after appropriate epoxy resin is heated to 60 DEG C, be proportionally added into dibutylester and acetone is mixed thoroughly, be eventually adding second
Diamines, epoxy resin base fluid is formed after mixing thoroughly.
Cement bonded sand compound is poured into epoxy resin base fluid and is uniformly mixing to obtain epoxy resin mortar with mixer.
To ensure that epoxy resin mortar fully solidifies, preparing quantity every time should determine according to tensile test specimen quantity, accomplish
With preparing with use, usage time is in 40min.
3rd, epoxy resin mortar pours
The mortar mixture prepared more than is more bigger than rod member width by rod member retained part and one section of 200mm length, diameter
Reinforcing bar simultaneously be cast in 20~30mm of diameter, length 250mm length steel pipe in, and suitably vibration plug and pound so that in steel pipe
Epoxy resin mortar filling it is closely knit, be made tensile test specimen (reinforcing bar be used as gasket material, can prevent fixture extruding steel pipe when extrude
Bad rod member), rod member center section is initial gage, and tensile test specimen is put into maintenance test specimen 24h in 40 DEG C of air dry oven, made
Epoxy resin mortar can fully solidify, and reach compression strength and adhesion strength needed for experiment.
3rd, tension test
1st, tensile strength and the measure of tensile modulus of elasticity
Because carbon fibre composite is anisotropic fragile material, it is very conscientious that experiment is loaded, good to ensure
Centering.Experiment is loaded sample using manual wedge type stretching clamp, is first clamped the lower end of sample, is clamped again on sample afterwards
End, firmly will slowly uniformly during hand-operated clamping sample, and avoiding incorrect sample from being loaded influences test result.
When determining tensile strength, draw speed 5mm/min, continuous loading is until sample destroys, when record sample destroys
Maximum load value, pass through formula tensile strength calculated.
When determining tensile modulus of elasticity, using the method for extensometer, draw speed 1mm/min, continuous loading, with ten thousand
Can the progress data processing of Material Testing Machine software.
2nd, experimental phenomena
Pi in small, broken bits off and on crack sound occurs in test specimen in loading procedure, continuous close to sound when destroying
Constantly, sound is increasing, until test specimen destroys suddenly, destroys the equal fragmentation of opening position glue-line, occurs in the range of specimen equidistance line marking
The failure mode of fiber interfascicular separation tear.
3rd, due to the anisotropy feature of fibrous composite, it is very conscientious that experiment is loaded, it is ensured that good centering
Property.When the loading axis of testing machine and the inconsistent geometric center of sample, in loading process, due to lacking itself collaboration machine
System, additional bending stress is very big, makes the Strain Distribution of whole gauge length section uneven, causes sample to destroy ahead of time；In addition, testing machine
If the sample in chuck fills crooked, it can often cause slip, influence measurement result.
Feature and advantage
1st, feature
Using the high compressive strength of epoxy resin mortar in itself and the high bond strength with fibre reinforced composites, make
Rod member is stretched fracture in guage section, so as to obtain the real tensile strength of fibre reinforced composites and tensile modulus of elasticity
Value.
2nd, advantage
Each formulation material for the epoxy resin mortar that the technology is selected commercially is readily available, cheap, is once tried
Total dosage 4kg of (5 test specimens) compound or so is tested, cost is low, and detection cycle is short, simple to operate, reliable, and detection data are accurate,
Good application effect is achieved in long-term experiment work
3rd, application example
The commission censorship concrete anchoring of Jinan assembled architecture engineering with fibre reinforced materials do tension test (tensile strength and
Tensile modulus of elasticity), the sample system external import, fixture retained part is handled according to above technology, measure 5 stretchings
The tensile strength average value of test specimen is 992MPa, and tensile modulus of elasticity average value is 46GPa, the external detection provided with consigner
Data approach, and destroying or slipping do not occur 5 extension rod pieces in rupture failure, retained part in experiment gauge length.
Embodiment 2
By multiple research and improvement, the fixture clamping part to anchoring with fibre reinforced composites tension test rod member
Divide and handled using following technology：
1st, the match ratio of epoxy resin mortar
2nd, the blending craft of epoxy resin mortar：
The sand that particle diameter is 0.2~5.0mm (or crossing 5mm sieves) is put into after being dried in 105 DEG C of baking oven, weighed in proportion
Sand after appropriate 425R cement and the drying, it is mixed and stirred for uniformly stand-by.
Weigh after appropriate epoxy resin is heated to 60 DEG C, be proportionally added into dibutyl phthalate (DBP) and acetone is mixed thoroughly,
Ethylenediamine is eventually adding, epoxy resin base fluid is formed after mixing thoroughly.
Cement bonded sand compound is poured into epoxy resin base fluid and is uniformly mixing to obtain epoxy resin mortar with mixer.
To ensure that epoxy resin mortar fully solidifies, preparing quantity every time should determine according to tensile test specimen quantity, accomplish
With preparing with use, usage time is in 40min.
3rd, the preparation of fibre reinforced composites tensile test specimen
The mortar mixture prepared more than is more bigger than rod member width by rod member retained part and one section of 300mm length, diameter
Reinforcing bar simultaneously be cast in 20~30mm of diameter, length 300mm length steel pipe in, and suitably vibration plug and pound so that in steel pipe
Epoxy resin mortar filling it is closely knit, be made tensile test specimen (reinforcing bar be used as gasket material, can prevent fixture extruding steel pipe when extrude
Bad rod member), rod member center section is initial gage, and tensile test specimen is put into maintenance test specimen 48h in standard curing box, makes asphalt mixtures modified by epoxy resin
Fat mortar can fully solidify, and reach compression strength and adhesion strength needed for experiment.
4th, feature
Using the high compressive strength of epoxy resin mortar in itself and the high bond strength with fibre reinforced composites, make
Rod member is stretched fracture in guage section, so as to obtain the real tensile strength of fibre reinforced composites and tensile modulus of elasticity
Value.
5th, advantage
Each formulation material for the epoxy resin mortar that the technology is selected commercially is readily available, cheap, is once tried
Total dosage 4kg of (5 test specimens) compound or so is tested, cost is very low, and detection cycle is short (48h), simple to operate, reliable, testing number
According to accurate, good application effect is achieved in long-term experiment work
6th, application example
Dezhou building constructor entrusts censorship anchoring to do tension test (tensile strength and stretching bullet with fiber-reinforced composite bar
Property modulus), the sample is handled fixture retained part according to above technology, and method of testing measures 5 drawings with embodiment 1
The tensile strength average value of boom part is 1052MPa, and tensile modulus of elasticity average value is 51GPa, and 5 extension rod pieces are being tested
Rupture failure in gauge length, retained part are not destroyed and slipped.
Embodiment 3
Method of testing is same as Example 1, and testing sample isSolid glass fiber anchor rod andIt is hollow
Glass fibre anchor pole (wall thickness 5mm, each 50).
As a result show：Effective 99 times, failure 1 time (pulling), the effective sample tensile failure fracture of test data occurs
In Validity Test part, failure mode destroys for the reflection shape of splitting, shows that the tension test model is rational.Wherein, have
The tensile strength average value of the solid glass fiber anchor rod sample of effect is 562MPa, and tensile modulus of elasticity average value is 46GPa.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. the tension test of a kind of fibre reinforced composites anchoring epoxy resin mortar, it is characterised in that by following weight
The raw material composition of part：100~150 parts of epoxy resin, 15~25 parts of ethylenediamine, 15~25 parts of dibutyl phthalate, acetone
20~30 parts, 200~280 parts of cement, 500~600 parts of sand.
2. mortar as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：Epoxy resin 100~
125 parts, 15~20 parts of ethylenediamine, 15~20 parts of dibutyl phthalate, 20~25 parts of acetone, 200~240 parts of cement, sand
500~550 parts.
3. mortar as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：Epoxy resin 125~
150 parts, 20~25 parts of ethylenediamine, 20~25 parts of dibutyl phthalate, 20~30 parts of acetone, 200~280 parts of cement, sand
500~600 parts.
4. the mortar as described in claim any one of 1-3, it is characterised in that the particle diameter of the sand is 0.2~5.0mm.
A kind of 5. tension test of fibre reinforced composites compound method of anchoring epoxy resin mortar, it is characterised in that
Including：
Dry sand is uniform with cement mixing, obtain cement mortar；
Epoxy resin is well mixed with dibutyl phthalate, acetone, ethylenediamine, forms epoxy resin base fluid；
The cement mortar is well mixed with epoxy resin base fluid, obtains epoxy resin mortar.
6. method as claimed in claim 5, it is characterised in that the specific preparation method of the cement mortar is：It is by particle diameter
0.2~5.0mm (or crossing 5mm sieves) sand, which is put into 105 DEG C of baking oven, dries, and weighs appropriate 425R cement in proportion and is somebody's turn to do
Sand after drying, it is mixed and stirred for uniformly stand-by.
7. method as claimed in claim 5, it is characterised in that the specific preparation method of the epoxy resin base fluid is：Weigh
After appropriate epoxy resin is heated to 60 DEG C, it is proportionally added into dibutylester and acetone is mixed thoroughly, be eventually adding ethylenediamine, mix rear shape thoroughly
Into epoxy resin-matrix liquid.
8. method as claimed in claim 5, it is characterised in that the dosage of the raw material is as follows：100~150 parts of epoxy resin,
15~25 parts of ethylenediamine, 15~25 parts of dibutyl phthalate, 20~30 parts of acetone, 200~280 parts of cement, sand 500~
600 parts.
9. epoxy resin mortar prepared by the method described in claim any one of 5-8.
10. claim 1-4 or epoxy resin mortar described in 8 any one are in the tension test of fibre reinforced composites
Using.
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Cited By (10)
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| CN108507934A (en) * | 2018-04-09 | 2018-09-07 | 武汉科技大学 | A kind of experimental rig for FRP tendons body immersion corrosion |
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| CN110146351A (en) * | 2018-12-14 | 2019-08-20 | 卡本科技股份有限公司 | A kind of carbon fiber mesh tensile strength test preparation method of reinforced sheet |
| CN110186778A (en) * | 2019-06-12 | 2019-08-30 | 卡本科技集团股份有限公司 | A kind of method for testing and detecting of carbon fiber mesh reinforced concrete beam |
| CN110281381A (en) * | 2019-05-30 | 2019-09-27 | 东南大学 | The preparation method of muscle material enhancing cement-base composite material test specimen based on beam type pull-out test |
| CN110779799A (en) * | 2019-11-20 | 2020-02-11 | 青岛滨海学院 | Thermal management composite material tensile test sample and preparation method thereof |
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| CN113264722A (en) * | 2021-05-07 | 2021-08-17 | 深圳市居安建筑科技有限公司 | Rear buried water stop anchoring agent |
| CN114880832A (en) * | 2022-03-01 | 2022-08-09 | 辽宁工程技术大学 | Wall thickness design method for glass fiber anchor rod cementing connection sleeve |
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| CN108507934A (en) * | 2018-04-09 | 2018-09-07 | 武汉科技大学 | A kind of experimental rig for FRP tendons body immersion corrosion |
| CN108920734A (en) * | 2018-04-20 | 2018-11-30 | 中国矿业大学 | GFRP anchor pole drawing process meso-mechanical analysis method |
| CN110146351A (en) * | 2018-12-14 | 2019-08-20 | 卡本科技股份有限公司 | A kind of carbon fiber mesh tensile strength test preparation method of reinforced sheet |
| CN110281381A (en) * | 2019-05-30 | 2019-09-27 | 东南大学 | The preparation method of muscle material enhancing cement-base composite material test specimen based on beam type pull-out test |
| CN110186778A (en) * | 2019-06-12 | 2019-08-30 | 卡本科技集团股份有限公司 | A kind of method for testing and detecting of carbon fiber mesh reinforced concrete beam |
| CN110779799A (en) * | 2019-11-20 | 2020-02-11 | 青岛滨海学院 | Thermal management composite material tensile test sample and preparation method thereof |
| CN112067397A (en) * | 2020-09-18 | 2020-12-11 | 陕西法士特汽车传动集团有限责任公司 | Method for improving experimental effectiveness of tensile property of carbon fiber cloth |
| CN112557193A (en) * | 2020-12-07 | 2021-03-26 | 上海若顺检测技术有限公司 | Detection tool for tensile property of thermoplastic composite material |
| CN113264722A (en) * | 2021-05-07 | 2021-08-17 | 深圳市居安建筑科技有限公司 | Rear buried water stop anchoring agent |
| CN114880832A (en) * | 2022-03-01 | 2022-08-09 | 辽宁工程技术大学 | Wall thickness design method for glass fiber anchor rod cementing connection sleeve |
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