CN202869894U - Concrete elasticity modulus determinator - Google Patents
Concrete elasticity modulus determinator Download PDFInfo
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- CN202869894U CN202869894U CN 201220499238 CN201220499238U CN202869894U CN 202869894 U CN202869894 U CN 202869894U CN 201220499238 CN201220499238 CN 201220499238 CN 201220499238 U CN201220499238 U CN 201220499238U CN 202869894 U CN202869894 U CN 202869894U
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Abstract
The utility model relates to a concrete statically-pressed elasticity modulus determinator which belongs to the technical field of building material detection and solves the problems that the traditional instrument is difficult to operate and the test accuracy is difficultly ensured. Level bubbles are additionally arranged at the upper sides of the opposite positions of two fastening screws positioned on the front end and rear end of the upper ring of the traditional concrete elasticity modulus determinator and play a role in accessorily adjusting the angle of a lower press plate ball seat so that a test piece can uniformly contact an upper press plate in a balancing way. In addition, a test piece positioning auxiliary scale is manufactured, the test piece positioning auxiliary scale is in a T-shaped structure and provided with two dotting circular holes, the dotting circular holes and the center line of the test piece are formed face to face, and the test piece positioning auxiliary scale can be used for drawing auxiliary positioning points on the side surfaces of the test piece before the instrument is arranged, so that the instrument is accurately arranged.
Description
Technical field:
The utility model relates to a kind of for measuring concrete static(al) pressurized elastic modulus tester.It belongs to building materials detection technique field.
Background technology:
Concrete is the important building materialss of each large factory such as industry, national defence, covil construction, bridge, tunnel and power station, accurate test to mechanical performance of concrete, detecting building material, structural elements and process half-finished quality condition with quantitative methodological science ground, is the key that guarantees construction engineering quality.Elastic modulus is the important mechanical property of concrete, and it has reflected the suffered stress of concrete and the relation between the strain of producing, and is one of the necessary parameter of temperature stress of calculating distortion, crack developing and the mass concrete of reinforced concrete structure.
According to existing national standard " standard for test methods of mechanical properties of ordinary concrete " testing requirements (GB50081-2002), measuring instrument should meet technical requirement in " the dial test indicator product quality is graded ", two in clock gauge (0 grade or 1 grade); Or precision is not less than other instrument of 0.001mm.Concrete sample is of a size of the standard prism of 150mm * 150mm * 300mm, and the angle between the adjacent surface of test specimen should be 90 °, and its tolerance must not be above 0.5 °; The dimensional tolerence of each length of side of test specimen must not surpass 1mm.As seen national standard is very strict for the accuracy requirement of test.Analyzer should be installed on the center line of test specimen both sides and two ends symmetrical and test specimen in the test.Then test specimen is placed on the pressure testing machine, its axle center is aimed at the center line of lower platen, start pressure testing machine, when top board and test specimen near the time adjust ball seat, make its contact balanced.When existing modulus of elasticity of concrete analyzer can contact with top board is balanced test specimen at the adjustment ball seat, can find relying on range estimation adjustment angle that inconvenience is arranged more, often deviation occurs, easily cause unbalance stress, the overproof problem that can't continue to test of left and right sides clock gauge reading.
Summary of the invention:
For tackling the complicated difficulty of existing instrumentation, during installation testing, be prone to dimensional discrepancy, the problem that precision is difficult to guarantee, the utility model is to increase by a device on the basis of existing TM-2 type modulus of elasticity of concrete analyzer, be that upside at two the trip bolt correspondence positions in pressed on ring front and back end installs air level additional, its effect is can assist to adjust lower platen ball seat angle, make test specimen can with top board balance uniform contact.Other has made test specimen location auxiliary scale, is T-shaped structure, top crossfoot range 150mm, scale division value 1mm, dipstick metering journey 300mm, scale division value 1mm are erected in the middle part, the crossfoot middle is connected with perpendicular chi, and a spacing blend stop is arranged at bottom, the crossfoot back side, is convenient to when test specimen is drawn some ruler is positioned at the test specimen top.Perpendicular chi at the 75mm place, respectively there is a diameter 2mm circular hole in centre position, 225mm place, the center of circular hole position is corresponding with crossfoot 75mm, can be on this two-point drawing test specimen center line anchor point.Before installing instruments, use positioning rule to draw the auxiliary positioning point in each side of test specimen, be convenient to install instruments accurately.These two kinds of accessory structures are simple, easy to operate to be increased the degree of accuracy of process of the test and raises the efficiency.
Description of drawings:
Fig. 1: be modulus of elasticity of concrete analyzer described in the utility model
Fig. 2: be auxiliary scale front, test specimen location
Fig. 3; Be the auxiliary scale back side, test specimen location
Below in conjunction with accompanying drawing each position of the utility model is further specified
Among the figure, the 1-air level; The 2-pressed on ring; Encircle under the 3-; 4-test block trip bolt; 5-fixed head: 6-fixed head trip bolt; The 7-clock gauge; The 8-contact lever; 9-clock gauge trip bolt; The 10-crossfoot; 11-erects chi; 12-draws the some circular hole; The spacing blend stop of 13-.
Embodiment:
Before on-test, concrete sample is disposed across on the smooth plane, test specimen is located auxiliary scale place the test specimen surface, the spacing blend stop (13) at crossfoot (10) back side is contacted with the test specimen top to align, just in time corresponding test specimen center line is concordant with the bottom to erect chi (11) this moment, then in drawing some circular hole (12), put on anchor point, in kind remaining three side is also drawn anchor point.Then elastic modulus tester is positioned on the smooth plane, screws out test block trip bolt (4), be inserted in test block, tighten again test block trip bolt (4) after aiming at each anchor point.Screw out clock gauge trip bolt (9) and load onto clock gauge (7), join with contact lever (8), unclamp fixed head trip bolt (6), take off fixed head (5), then analyzer precise positioning in test block.Analyzer is placed on the lower platen of pressure testing machine test block center and pressing machine lower platen centrally aligned, clock gauge (7) zeroing together with test block.Start pressing machine, when top board and test specimen near the time, adjust the ball seat angle according to the position of pressed on ring (2) air level (1), make the test specimen contact balanced, be loaded into the initial payload values F of 0.5MPa
0, keep the interior distortion reading ε that records every measuring point clock gauge (7) of dead load 60s and 30s afterwards
0Immediately continuous uniform ground loading to stress is 1/3 payload values F of axial compressive strength
a, keep the interior distortion reading ε that records each measuring point clock gauge (7) of dead load 60s and 30s afterwards
aWhen the ratio of the difference of above these deformation values and their mean value greater than 20% the time, should again adjust test piece angle, revision test behind the centering test specimen according to the interior bubble position of air level (1).Guarantee no longer overproof after with identical speed off-load to initial payload values F corresponding to benchmark stress 0.5MPa
oAnd hold lotus 60s.With identical speed loading to payload values F
a, keep again the 60s dead load, at last with the extremely initial payload values F of identical speed off-load
o, carry out at least twice precompressed circulation.After finishing last precompressed, keep the initial payload values F of 60s
0, record both sides clock gauges (7) reading ε in follow-up 30s
0, use again same loading speed loading to payload values F
a, keep again the 60s dead load, and in follow-up 30s, record both sides clock gauges (7) reading ε
aCalculate the elastic mould value of surveying according to formula 1 at last.
Formula 1:
In the formula: E
c-compressive elastic modulus of concrete (MPa);
F
a-whole load (N) (during 1/3fcp corresponding payload values);
Fo-is load (N) (during 0.5MPa corresponding payload values) just;
L-measures gauge length (mm);
A-test specimen bearing area (mm
2);
Δ n---during last loading, the test specimen both sides are at F
aAnd F
0The lower modified difference mean value (mm) of effect.
Claims (2)
1. modulus of elasticity of concrete analyzer, it is characterized in that: the upside at the pressed on ring front and back end of modulus of elasticity of concrete analyzer trip bolt correspondence position installs air level additional.
2. modulus of elasticity of concrete analyzer as claimed in claim 1 is characterized in that comprising test specimen location auxiliary scale.Test specimen location auxiliary scale is T-shaped structure, top crossfoot range 150mm, scale division value 1mm, the perpendicular dipstick metering journey 300mm in middle part, scale division value 1mm, the crossfoot middle is connected with perpendicular chi, one spacing blend stop is arranged at bottom, the crossfoot back side, is convenient to when test specimen is drawn some ruler is positioned at the test specimen top.Perpendicular chi at the 75mm place, respectively there is a diameter 2mm circular hole in centre position, 225mm place, the center of circular hole position is corresponding with crossfoot 75mm, can be on this two-point drawing test specimen center line anchor point.Before installing instruments, use positioning rule to draw the auxiliary positioning point in each side of test specimen, be convenient to install instruments accurately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220499238 CN202869894U (en) | 2012-09-23 | 2012-09-23 | Concrete elasticity modulus determinator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220499238 CN202869894U (en) | 2012-09-23 | 2012-09-23 | Concrete elasticity modulus determinator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202869894U true CN202869894U (en) | 2013-04-10 |
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ID=48036603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220499238 Expired - Fee Related CN202869894U (en) | 2012-09-23 | 2012-09-23 | Concrete elasticity modulus determinator |
Country Status (1)
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| CN (1) | CN202869894U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043227A (en) * | 2015-05-14 | 2015-11-11 | 江苏省交通科学研究院有限公司 | Rubber bearer shear deformation angle measuring instrument and using method thereof |
| CN106018076A (en) * | 2016-06-23 | 2016-10-12 | 中铁六局集团有限公司 | Device and method for measuring static compression strain of concrete |
| CN107246999A (en) * | 2017-07-13 | 2017-10-13 | 苏州市建设工程质量检测中心有限公司 | Concrete static(al) compression modulus of elasticity automatic analyzer |
| CN107870119A (en) * | 2016-09-23 | 2018-04-03 | 河北新丰工程检测有限公司 | For adjusting the device of concrete test block compression strength center |
| CN108426773A (en) * | 2018-04-26 | 2018-08-21 | 中铁十六局集团第二工程有限公司 | Concrete static(al) compression elasticity modulus test automatic acquisition device, system and method |
| CN109612828A (en) * | 2018-11-24 | 2019-04-12 | 河南省城乡规划设计研究总院有限公司 | Small building garbage regeneration material material mechanical performance test platform |
| CN110646295A (en) * | 2019-10-25 | 2020-01-03 | 中铁九局集团工程检测试验有限公司 | Anti bearing capacity detection device that splits of detachable RPC apron |
| CN111122361A (en) * | 2020-01-13 | 2020-05-08 | 长安大学 | Test piece center positioning device and method for soil-based resilience modulus measurement |
| CN111398038A (en) * | 2020-04-29 | 2020-07-10 | 中铁二十局集团有限公司 | Elastic modulus tester |
| CN112326419A (en) * | 2020-11-06 | 2021-02-05 | 重庆大学 | Concrete elastic modulus measuring method based on capillary stress |
| CN117760825A (en) * | 2023-11-30 | 2024-03-26 | 西南石油大学 | Device and method for measuring elastic modulus of mass concrete |
-
2012
- 2012-09-23 CN CN 201220499238 patent/CN202869894U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043227A (en) * | 2015-05-14 | 2015-11-11 | 江苏省交通科学研究院有限公司 | Rubber bearer shear deformation angle measuring instrument and using method thereof |
| CN106018076A (en) * | 2016-06-23 | 2016-10-12 | 中铁六局集团有限公司 | Device and method for measuring static compression strain of concrete |
| CN107870119A (en) * | 2016-09-23 | 2018-04-03 | 河北新丰工程检测有限公司 | For adjusting the device of concrete test block compression strength center |
| CN107246999A (en) * | 2017-07-13 | 2017-10-13 | 苏州市建设工程质量检测中心有限公司 | Concrete static(al) compression modulus of elasticity automatic analyzer |
| CN108426773A (en) * | 2018-04-26 | 2018-08-21 | 中铁十六局集团第二工程有限公司 | Concrete static(al) compression elasticity modulus test automatic acquisition device, system and method |
| CN109612828A (en) * | 2018-11-24 | 2019-04-12 | 河南省城乡规划设计研究总院有限公司 | Small building garbage regeneration material material mechanical performance test platform |
| CN110646295A (en) * | 2019-10-25 | 2020-01-03 | 中铁九局集团工程检测试验有限公司 | Anti bearing capacity detection device that splits of detachable RPC apron |
| CN111122361A (en) * | 2020-01-13 | 2020-05-08 | 长安大学 | Test piece center positioning device and method for soil-based resilience modulus measurement |
| CN111398038A (en) * | 2020-04-29 | 2020-07-10 | 中铁二十局集团有限公司 | Elastic modulus tester |
| CN111398038B (en) * | 2020-04-29 | 2021-05-14 | 中铁二十局集团有限公司 | Elastic modulus tester |
| CN112326419A (en) * | 2020-11-06 | 2021-02-05 | 重庆大学 | Concrete elastic modulus measuring method based on capillary stress |
| CN112326419B (en) * | 2020-11-06 | 2021-09-28 | 重庆大学 | Concrete elastic modulus measuring method based on capillary stress |
| CN117760825A (en) * | 2023-11-30 | 2024-03-26 | 西南石油大学 | Device and method for measuring elastic modulus of mass concrete |
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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: 20130410 Termination date: 20130923 |