CN105004613A - Tensile strength testing method for fiber monofilaments for cement and concrete - Google Patents
Tensile strength testing method for fiber monofilaments for cement and concrete Download PDFInfo
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- CN105004613A CN105004613A CN201510473541.0A CN201510473541A CN105004613A CN 105004613 A CN105004613 A CN 105004613A CN 201510473541 A CN201510473541 A CN 201510473541A CN 105004613 A CN105004613 A CN 105004613A
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Abstract
The invention discloses a tensile strength testing method for fiber monofilaments for cement and concrete and belongs to the technical field of fiber strength tests. A folio straight line mark is arranged on a piece of planar paper, the paper is symmetrically cut into a plurality of sawtooth long strips at an equal interval. The fiber monofilaments are bonded to the sawtooth long strips on the same side of the folio straight line. The planar paper is folioed, and the fiber monofilaments are enabled to be wrapped in the paper. The middles of the adjacent sawtooth long strips are cut, and fiber monofilament tensile samples are obtained. Two test clamps are respectively clamped to the two ends with the fiber monofilaments wrapped by the paper, two layers of closed paper are formed, and tensile tests are performed on the fiber monofilament tensile samples. The method solves the problem that fibers are damaged in the clamping process of the clamps and can also effectively prevent the phenomenon that because clamping of the clamps is not firm, the fiber monofilaments slide and disengage, and detected data can be objective and accurate.
Description
Technical field
The invention belongs to fibre strength method of testing technical field.
Background technology
Cement and concrete is current topmost manufactured construction materials, traditional concrete have impervious poor, easily split, the easy distinct disadvantage such as generation brittle rupture, but in concrete, add fiber can obviously improve these shortcomings.But the intensity of fiber directly affects the intensity of fibre reinforced composites, detection is carried out to the intensity of fibre single thread and seems particularly important.
Traditional filament strength detection method is: the monofilament intercepting certain length by testing requirements, the two ends of monofilament are directly clamped in respectively on two fixtures, start detector, wherein one is made to be subjected to displacement between fixture and another fixture, single line is ruptured under stretch, record pulling force now with this, be monofilament tensile strength.Because fixture exists the uneven situation of clamping force when clamping monofilament, monofilament is caused to be subject to concentrating of local stress at fixture place, therefore, often the above data detected not are the objective data reflection of monofilament fiber in drawing process, so above-mentioned traditional filament strength detection method is easy to cause damage and detection method data generation deviation to fiber.
Therefore, be necessary to improve existing Tensile strength of single fiber method of testing.
Summary of the invention
The present invention seeks to cause detection data not objective and a kind of method for the test of fibre single thread pulling strengrth of design in order to solve traditional method of clamping to the damage of fibre single thread and method of testing.
The present invention includes following steps:
1) sample prepares: on a plain paper, arrange a doubling straight line mark, with this doubling straight line mark for symmetrical center line, symmetrically paper is tailored into that to have equidistant multiple sawtooth rectangular, fibre single thread is bonded in 502 glue each sawtooth being arranged in doubling straight line the same side rectangular; By described doubling straight line mark by plain paper doubling, fibre single thread is made to be wrapped in described paper; Along in the perpendicular direction of described doubling straight line mark, each rectangular middle part of adjacent sawtooth is sheared, obtains fibre single thread tensile sample respectively;
2) clamping, tension test: get a fibre single thread tensile sample, two test fixtures are clamped in respectively the two ends of the fibre single thread respectively with paper parcel, then cut off the exposed two-layer closed paper in fibre single thread side, then tension test is carried out to fibre single thread tensile sample.
Sample set-up procedure of the present invention is simple, and can make multiple sample simultaneously.It is crucial that: the two ends of the fibre single thread that the present invention is wrapped up by paper, fixture is not in direct contact with on fibre single thread, solve the problem that fixture damages fiber in clamping process, also can effectively prevent holder from loosely causing the phenomenon of fibre single thread slippage, improve conventional efficient, also make the data that detect objective, accurate.
The above-described fiber of the present invention comprises: glass fibre, basalt fibre, vinal and mekralon.
Accompanying drawing explanation
Fig. 1 is the physical dimension schematic diagram of plain paper.
Fig. 2 is the schematic diagram of the plain paper after binder fibre monofilament.
Fig. 3 is along the schematic diagram after the doubling of doubling straight line mark by Fig. 2.
Fig. 4 is the single fibre single thread tensile sample schematic diagram after being cut off by Fig. 3.
Embodiment
1, sample prepares:
Be 30mm in a physical dimension
the plain paper of 270mm is arranged a doubling straight line mark 1, with this doubling straight line mark 1 for symmetrical center line, symmetrically paper is tailored into that to have 18 equidistant sawtooth rectangular, the opening size of sawtooth is 5mm
10mm, as shown in Figure 1.
Can also draw the glass fiber single filament position line 2 parallel with doubling straight line mark 1 on 18 sawtooth of doubling straight line mark 1 the same side are rectangular, position line 2 is 10mm apart from the distance of doubling straight line mark 1.
By stretching for a glass fiber single filament 3, and cover on position line 2, then, with 502 glue 4 first the two ends of glass fiber single filament 3 are bonded in the sawtooth being positioned at position line 2 two ends rectangular on.Again with 502 glue 4 by between glass fiber single filament 3 be bonded in each sawtooth rectangular in.As shown in Figure 2.
Determine that above each point all bonds firmly, by doubling straight line mark 1 by plain paper doubling, glass fiber single filament 3 is wrapped in paper.As shown in Figure 3.In figure, 5 is shear line.
Along in the perpendicular direction of described doubling straight line mark 1, each rectangular middle part of adjacent sawtooth is sheared, is namely divided into two, obtain 18 single glass fiber single filament tensile samples respectively, as shown in Figure 4.
2, clamping, tension test:
Get a glass fiber single filament tensile sample, two test fixtures are clamped in respectively have respectively paper parcel glass fiber single filament 3(section) two ends, the clamp distance of single half-open slot type sample is 5mm.
Then cut off the two-layer closed paper 6 in exposed glass fiber single filament 3 side, then tension test is carried out to glass fiber single filament tensile sample.
Read fracture strength after fibre single thread fracture, afterwards each sample stretched successively and read fracture strength.
Method of operating according to this again, carries out tension test one by one to other glass fiber single filament tensile sample repeatedly.
3, get the glass fiber single filament that same batch is produced, test respectively with original method (direct chucking method) and the inventive method, the Comparative result table obtained is as follows:
Known by test figure, same fiber, original method (directly clamping) gained proof strength is significantly less than the proof strength using this method gained, this is because directly clamping causes damage to cause to fiber.This method strength variable coefficient, much smaller than original method, illustrates and uses the undulatory property of this method gained proof strength to be significantly less than original method.
In addition, basalt fibre, vinal or mekralon are substituted the glass fibre of above test, also can obtain similar effect.
Claims (2)
1., for the method that cement and concrete is tested by fibre single thread pulling strengrth, it is characterized in that comprising the following steps:
1) sample prepares: on a plain paper, arrange a doubling straight line mark, with this doubling straight line mark for symmetrical center line, symmetrically paper is tailored into that to have equidistant multiple sawtooth rectangular, fibre single thread is bonded in 502 glue each sawtooth being arranged in doubling straight line the same side rectangular; By described doubling straight line mark by plain paper doubling, fibre single thread is made to be wrapped in described paper; Along in the perpendicular direction of described doubling straight line mark, each rectangular middle part of adjacent sawtooth is sheared, obtains fibre single thread tensile sample respectively;
2) clamping, tension test: get a fibre single thread tensile sample, two test fixtures are clamped in respectively the two ends of the fibre single thread respectively with paper parcel, then cut off the exposed two-layer closed paper in fibre single thread side, then tension test is carried out to fibre single thread tensile sample.
2. method according to claim 1, is characterized in that described fiber is any one in glass fibre, basalt fibre, vinal or mekralon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510473541.0A CN105004613B (en) | 2015-08-05 | 2015-08-05 | A kind of method tested for cement and concrete with fibre single thread tensile strength |
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| CN201510473541.0A CN105004613B (en) | 2015-08-05 | 2015-08-05 | A kind of method tested for cement and concrete with fibre single thread tensile strength |
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| CN105004613A true CN105004613A (en) | 2015-10-28 |
| CN105004613B CN105004613B (en) | 2017-10-17 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289957A (en) * | 2016-07-28 | 2017-01-04 | 上海荣南橡塑科技有限公司 | In a kind of sealing strip single extraction force test clamping tooling and method of testing |
| CN107153027A (en) * | 2017-07-05 | 2017-09-12 | 陕西科技大学 | A kind of Mechanics Performance Testing device of micron order monfil |
| CN108225865A (en) * | 2018-01-19 | 2018-06-29 | 扬州大学 | A kind of test specimen production method of the fixed cement concrete tension test for the bundle fiber that is chopped |
| CN108844822A (en) * | 2018-06-13 | 2018-11-20 | 扬州大学 | A method of for detecting chopped strand alkaline resistance properties |
| CN108871953A (en) * | 2018-06-13 | 2018-11-23 | 扬州大学 | A method of for detecting fiber alkaline resistance properties |
| CN109443862A (en) * | 2018-06-27 | 2019-03-08 | 中纺标检验认证股份有限公司 | The sub-wire device and method for making sample of high-strength chemistry filament tow |
| CN113063673A (en) * | 2021-04-01 | 2021-07-02 | 刘丛巍 | A testing arrangement for optic fibre intensity |
| CN114279838A (en) * | 2021-12-20 | 2022-04-05 | 扬州大学 | Tensile test manufacturing method for filament fibers |
| CN117168990A (en) * | 2023-11-03 | 2023-12-05 | 江苏源氢新能源科技股份有限公司 | ePTFE membrane tensile test method for proton exchange membrane |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289957A (en) * | 2016-07-28 | 2017-01-04 | 上海荣南橡塑科技有限公司 | In a kind of sealing strip single extraction force test clamping tooling and method of testing |
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| CN107153027A (en) * | 2017-07-05 | 2017-09-12 | 陕西科技大学 | A kind of Mechanics Performance Testing device of micron order monfil |
| CN108225865A (en) * | 2018-01-19 | 2018-06-29 | 扬州大学 | A kind of test specimen production method of the fixed cement concrete tension test for the bundle fiber that is chopped |
| CN108844822A (en) * | 2018-06-13 | 2018-11-20 | 扬州大学 | A method of for detecting chopped strand alkaline resistance properties |
| CN108871953A (en) * | 2018-06-13 | 2018-11-23 | 扬州大学 | A method of for detecting fiber alkaline resistance properties |
| CN108844822B (en) * | 2018-06-13 | 2021-03-26 | 扬州大学 | Method for detecting alkali resistance of chopped fibers |
| CN109443862A (en) * | 2018-06-27 | 2019-03-08 | 中纺标检验认证股份有限公司 | The sub-wire device and method for making sample of high-strength chemistry filament tow |
| CN113063673A (en) * | 2021-04-01 | 2021-07-02 | 刘丛巍 | A testing arrangement for optic fibre intensity |
| CN113063673B (en) * | 2021-04-01 | 2021-11-23 | 山东龙为检测技术有限公司 | A testing arrangement for optic fibre intensity |
| CN114279838A (en) * | 2021-12-20 | 2022-04-05 | 扬州大学 | Tensile test manufacturing method for filament fibers |
| CN117168990A (en) * | 2023-11-03 | 2023-12-05 | 江苏源氢新能源科技股份有限公司 | ePTFE membrane tensile test method for proton exchange membrane |
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