CN202471504U - Test rack for full-range static compressive elastic modulus of plastic concrete - Google Patents
Test rack for full-range static compressive elastic modulus of plastic concrete Download PDFInfo
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- CN202471504U CN202471504U CN2012200402379U CN201220040237U CN202471504U CN 202471504 U CN202471504 U CN 202471504U CN 2012200402379 U CN2012200402379 U CN 2012200402379U CN 201220040237 U CN201220040237 U CN 201220040237U CN 202471504 U CN202471504 U CN 202471504U
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Abstract
The utility model discloses a test rack for the full-range static compressive elastic modulus of plastic concrete, wherein two symmetrical and upright upper connection rods are fixedly connected to two ends on the back surface of an upper press plate matched with an upper press head of a testing machine respectively, two symmetrical and upright lower connection rods are fixedly connected to two ends on the top surface of a lower press plate matched with a lower press head of the testing machine respectively, and support seats are arranged at the top ends of the lower connection rods; and connection devices at the inner ends of bidirectional connection pieces are connected with the upper connection rods of the upper press plate in a matching manner, a connection device at the outer end of the bidirectional connection piece is provided with a measurement device in a matching manner, and a plastic concrete test piece is installed between the upper pressure plate and the lower press plate, and a measurement head of the measurement device is matched with the support seats at the top ends of the lower connection rods on the upper connection rods via the bidirectional connection pieces. The test rack disclosed by the utility model is reasonable in structure, convenient in operation, and capable of testing according to the actual dimensions of a moulded test piece; and the measurement data of test for the plastic concrete test piece is accurate, so that the deformation condition of the whole plastic concrete test piece can be accurately reflected.
Description
Technical field
The utility model belongs to the improvement that cooperates pressure testing machine test plasticity to mix earth gamut static(al) compression elasticity die test shelf structure, particularly a kind of plastic concrete gamut static(al) pressure-proof elasticity modulus test stand.
Background technology
Elastic modulus is static(al) pressure-proof elasticity modulus (hereinafter to be referred as an elastic modulus); Elastic modulus can be considered weighs the index that concrete produces the elastic deformation complexity; Its value is big more, and it is also big more to explain that the stress of certain elastic deformation takes place concrete, and promptly concrete rigidity is big more; That is under certain stress, it is more little that elastic deformation takes place.Elastic modulus is the mechanical property of a kind of most important, tool characteristic of resilient material.It is the sign of object elastic deformation complexity.This test stand is applicable to mainly that elastic modulus is little and requires the test specimen of the big plastic concrete of distortion to carry out elastic modulus used.
In the existing concrete test rules test method to the rigid concrete elastic modulus is arranged all, corresponding test stand is also arranged, but mainly there is following problem in existing test stand to the test that plastic concrete carries out elastic modulus:
The gauge length of test stand is selected
In the process of the test of plastic concrete elastic modulus; Find that the plastic concrete compressive deformation is different from rigid concrete; Compressive stress is not obvious to test specimen middle part transfer function by two compression faces during its pressurized, and compressive stress is reduced by two ends to middle part gradually, during the test specimen pressurized; The two ends distortion is big, and intermediate deformation is little.So be arranged at test specimen middle part gauge length 150mm by existing test stand, can not react actual compressive deformation amount, cause the elastic modulus of the plastic concrete of surveying bigger than normal.
Summary of the invention
The purpose of the utility model is to provide a kind of plastic concrete gamut static(al) pressure-proof elasticity modulus test stand; It is rational in infrastructure; Easy to operate; Can make an experiment according to the physical size of shaping test piece, the measurement data of test plastic concrete test specimen is accurate, can accurately reflect the distortion situation of whole plastic concrete.
The purpose of the utility model is achieved in that a kind of plastic concrete gamut static(al) pressure-proof elasticity modulus test stand; Two ends on its back side of top board of matching with the testing machine seaming chuck affixed respectively upright two of symmetry go up extension bars; Two ends on its end face of lower platen that matches with the testing machine push-down head affixed respectively two upright following extension bars of symmetry, on the top of extension bar down bearing is being set; The coupling arrangement of two-way web member inner end matches with the last extension bar of top board and is connected; The coupling arrangement cooperation of two-way web member outer end is installed with measurement mechanism; The plastic concrete test specimen is installed between top board and lower platen, and its measuring head of measurement mechanism of on last extension bar, installing through two-way web member matches with the bearing on following extension bar top.
Measure the static(al) pressure-proof elasticity modulus of plastic concrete right cylinder or rectangular parallelepiped test specimen.The upper and lower pressing plate of the utility model carries out axial pressure through testing machine to the plastic concrete test specimen respectively, and thickness of compressive plate is 16mm up and down, and has higher rigidity, so its distortion can not considered; It mainly is to connect two-way web member for last extension bar; Two-way web member then not only one fix extension bar, one will fix clock gauge or displacement transducer, is characterized in freely moving up and down according to the difference of test specimen height, to reach the purpose of test; Following extension bar then provides the transmission of distortion for plastic concrete test specimen compressive deformation.Because the upper and lower pressing plate of this test stand is a separate type, thus can make an experiment according to the physical size of shaping test piece, so this test stand is called the gamut test stand; After gamut is adopted in this test, can reflect the distortion situation of whole plastic concrete,
Preliminary work before using
Pressure testing machine or universal testing machine, the I class precision, range should not be greater than 200kN; Plastic concrete test specimen specification is φ 150mm * 300mm or 150 * 150mm * 300mm, and the die trial inwall should be coated the mineral oil or the release agent of thin layer; The dependent variable proving installation, adopting 2 in clock gauge or precision is 2 of the displacement transducers of 0.001mm.
Use step
1 relevant regulations making test specimen by " moulding of concrete sample and maintenance process ".Four test specimens of moulding are got one earlier and are measured axial compressive strength, its excess-three mensuration static elastic constant.
2 arrive test length of time after, test specimen is taken out from fog room, clean the surface, measure cross dimensions, cover with wet cloth, keeping wet, and test as early as possible.
3 are mounted to test stand on the testing machine push-down head, and make center-aligned, and are placed in test specimen on the lower platen of test stand, the center of test specimen should with test stand lower platen centrally aligned.Then top board is positioned over test specimen top, and with the top board centrally aligned.Start testing machine, when the testing machine seaming chuck contacted with the test stand top board soon, the adjustment ball seat made contact balanced.
4 measure axial compressive strength.Speed loading continuously and equably with 0.010MPa/s～0.015MPa/s.When test specimen begins distortion rapidly near destroying, should stop to adjust the testing machine throttle, destroy the record failing load until test specimen.
5 measure pressure-proof elasticity modulus.Adjust the upper-lower position of two-way web member, clock gauge or displacement transducer are fixed on the gamut deformation measurement frame, measure that gauge length adopts 300mm or according to the test specimen physical size; It is the height of test specimen; Be taken out to test from test specimen and finish, should not surpass 2h, and the attention test specimen is preserved moisture.Should perform the preliminary work of deformation measurement in advance.
6 start pressing machine, slowly exert pressure, and carry out precompressed, and loading speed is 0.010MPa/s～0.015MPa/s, and maximum precompression is should not be greater than 2kN.Precompressed is three times repeatedly, until adjacent twice deformation values differ be no more than 0.005mm till, otherwise should proceed precompressed, reach requirement until difference, but the number of times that increases precompressed should indicate in report.In the precompressed process, whether viewing test machine and deformation measuring device running be normal, should adjust if necessary.
7 test specimens carry out official test after precompressed, loading speed is identical with precompressed, write down the deformation values under each load (at least six).Loading stress reaches 50% o'clock of previous test specimen axial compressive strength limit failing load, unloads scale, is depressed into test specimen with identical speed and destroys (failing load is P).When adopting displacement transducer, the distortion that test specimen is measured in the gauge length is sent into X～Y registering instrument by displacement transducer through amplifier, draws the load strain curve automatically.Testing machine stopped test when test specimen destroyed.
Elastic modulus with the mean value of three test specimen measured values as test findings.It is ± 15% that single measured value and mean value allow difference, should this measured value be rejected when surpassing, and the mean value of getting remaining two test specimen measured values is as test findings, and when being less than two like available measured value in a group, this group is tested and should be reformed.
The utility model is rational in infrastructure, and is easy to operate, realized making an experiment according to the physical size of shaping test piece, and the measurement data of test plastic concrete test specimen is accurate, reflects the distortion situation of whole plastic concrete exactly.
Description of drawings
To combine accompanying drawing that the utility model is done further to describe below,
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of looking up of two-way web member.
Embodiment
A kind of plastic concrete gamut static(al) pressure-proof elasticity modulus test stand; Like Fig. 1, shown in Figure 2; Two ends on top board 2 its back sides of matching with testing machine seaming chuck 1 affixed respectively upright two of symmetry go up extension bars 3; Two ends on the lower platen that matches with testing machine push-down head 10 9 its end faces affixed respectively two upright following extension bars 8 of symmetry, on the top of extension bar 8 down bearing is being set; The coupling arrangement of two-way web member 4 inner ends matches with the last extension bar 3 of top board and is connected; The coupling arrangement cooperation of two-way web member 4 outer ends is installed with measurement mechanism 7; Between top board 2 and lower platen 9, plastic concrete test specimen 6 is installed, measurement mechanism 7 its measuring heads of on last extension bar 3, installing through two-way web member 4 match with the bearing on following extension bar 8 tops.The structure of two-way web member 4 is the Connection Block that two ends are being provided with coupling arrangement respectively; Coupling arrangement is served as reasons and is regulated the elastic bayonet lock of bolt 5 control apertures; The elastic bayonet lock of two-way web member 4 outer ends matches with last extension bar 3, and the elastic bayonet lock of two-way web member 4 inner ends matches with the shell of measurement mechanism 7.Measurement mechanism 7 is clock gauge or displacement transducer.The spacing of two following extension bars 8 of gap ratio of two last extension bars 3 is little.Top board 2 is rectangular slab with lower platen 9, and wherein lower platen 9 is bigger than top board 2.
Claims (5)
1. plastic concrete gamut static(al) pressure-proof elasticity modulus test stand; It is characterized in that: two ends on its back side of top board (2) of matching with testing machine seaming chuck (1) affixed respectively upright two of symmetry go up extension bars (3); Two ends on its end face of lower platen (9) that matches with testing machine push-down head (10) affixed respectively upright two the following extension bars (8) of symmetry, on the top of extension bar (8) down bearing is being set; The coupling arrangement of two-way web member (4) inner end matches with the last extension bar (3) of top board and is connected; The coupling arrangement cooperation of two-way web member (4) outer end is installed with measurement mechanism (7); Between top board (2) and lower platen (9), plastic concrete test specimen (6) is installed, goes up its measuring head of measurement mechanism (7) of installing through two-way web member (4) at last extension bar (3) and match with the bearing on following extension bar (8) top.
2. plastic concrete gamut static(al) pressure-proof elasticity modulus test stand according to claim 1; It is characterized in that: the structure of two-way web member (4) is the Connection Block that two ends are being provided with coupling arrangement respectively; Coupling arrangement is served as reasons and is regulated the elastic bayonet lock of bolt (5) control aperture; The elastic bayonet lock of two-way web member (4) outer end matches with last extension bar (3), and the elastic bayonet lock of two-way web member (4) inner end matches with the shell of measurement mechanism (7).
3. plastic concrete gamut static(al) pressure-proof elasticity modulus test stand according to claim 1 and 2, it is characterized in that: measurement mechanism (7) is clock gauge or displacement transducer.
4. plastic concrete gamut static(al) pressure-proof elasticity modulus test stand according to claim 1 is characterized in that: the spacing of two following extension bars of gap ratio (8) of two last extension bars (3) is little.
5. plastic concrete gamut static(al) pressure-proof elasticity modulus test stand according to claim 1, it is characterized in that: top board (2) and lower platen (9) are rectangular slab, and wherein lower platen (9) is bigger than top board (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200402379U CN202471504U (en) | 2012-02-06 | 2012-02-06 | Test rack for full-range static compressive elastic modulus of plastic concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200402379U CN202471504U (en) | 2012-02-06 | 2012-02-06 | Test rack for full-range static compressive elastic modulus of plastic concrete |
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| Publication Number | Publication Date |
|---|---|
| CN202471504U true CN202471504U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200402379U Expired - Fee Related CN202471504U (en) | 2012-02-06 | 2012-02-06 | Test rack for full-range static compressive elastic modulus of plastic concrete |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983509A (en) * | 2014-05-29 | 2014-08-13 | 金陵科技学院 | Stress entire curve testing device and method |
| CN104181039A (en) * | 2014-06-30 | 2014-12-03 | 山东省水利科学研究院 | Elastic modulus measuring method and device for flexible concrete with strength of 1-5MPa |
| CN106468638A (en) * | 2016-09-08 | 2017-03-01 | 新疆水利水电科学研究院 | Long cube specimen axial tension test fixture |
| CN107322763A (en) * | 2017-08-25 | 2017-11-07 | 济南四建（集团）有限责任公司 | A kind of pervious concrete compression strength test shaped device and forming method |
| CN108562489A (en) * | 2018-03-29 | 2018-09-21 | 北京交通大学 | A kind of displacement measuring device and testing machine suitable for material tensile test |
| CN109211670A (en) * | 2018-10-31 | 2019-01-15 | 湖南湘建检测有限公司 | The detection method of CA mortar elasticity modulus |
| CN111965060A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Press-in type on-site modulus of resilience measuring device |
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2012
- 2012-02-06 CN CN2012200402379U patent/CN202471504U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983509A (en) * | 2014-05-29 | 2014-08-13 | 金陵科技学院 | Stress entire curve testing device and method |
| CN104181039A (en) * | 2014-06-30 | 2014-12-03 | 山东省水利科学研究院 | Elastic modulus measuring method and device for flexible concrete with strength of 1-5MPa |
| CN104181039B (en) * | 2014-06-30 | 2016-11-23 | 山东省水利科学研究院 | A kind of intensity is the flexible concrete elasticity modulus measuring method of 1-5MPa |
| CN106468638A (en) * | 2016-09-08 | 2017-03-01 | 新疆水利水电科学研究院 | Long cube specimen axial tension test fixture |
| CN106468638B (en) * | 2016-09-08 | 2023-08-15 | 新疆水利水电科学研究院 | Axial tensile test fixture for long cube test piece |
| CN107322763A (en) * | 2017-08-25 | 2017-11-07 | 济南四建（集团）有限责任公司 | A kind of pervious concrete compression strength test shaped device and forming method |
| CN107322763B (en) * | 2017-08-25 | 2023-06-20 | 济南四建（集团）有限责任公司 | Permeable concrete compressive strength test piece forming device and forming method |
| CN108562489A (en) * | 2018-03-29 | 2018-09-21 | 北京交通大学 | A kind of displacement measuring device and testing machine suitable for material tensile test |
| CN108562489B (en) * | 2018-03-29 | 2024-03-19 | 北京交通大学 | Displacement measurement device and testing machine suitable for material tensile test |
| CN109211670A (en) * | 2018-10-31 | 2019-01-15 | 湖南湘建检测有限公司 | The detection method of CA mortar elasticity modulus |
| CN109211670B (en) * | 2018-10-31 | 2020-09-29 | 湖南湘建检测有限公司 | Detection method for elastic modulus of CA mortar |
| CN111965060A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Press-in type on-site modulus of resilience measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20140206 |