CN102435499B - Method and device for detecting stress strength of concrete by bending method - Google Patents
Method and device for detecting stress strength of concrete by bending method Download PDFInfo
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- CN102435499B CN102435499B CN 201110282390 CN201110282390A CN102435499B CN 102435499 B CN102435499 B CN 102435499B CN 201110282390 CN201110282390 CN 201110282390 CN 201110282390 A CN201110282390 A CN 201110282390A CN 102435499 B CN102435499 B CN 102435499B
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000005452 bending Methods 0.000 title abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 88
- 230000002742 anti-folding effect Effects 0.000 claims description 90
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010998 test method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000008485 antagonism Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The invention relates to a method and a device for detecting the compressive strength of concrete by a bending method. The method comprises the following steps of: recording rupture load during damage of the concrete and an area of a damaged section to calculate bending strength; and establishing a correlativity between the bending strength and the corresponding strength of a cubic test piece with the side length of 150mm to deduce the compressive strength of the concrete. By applying fracture resistance force to a test piece, influencing factors in the testing process are reduced and the testing accuracy is improved; moreover, the testing process is simple and feasible. The invention can be widely applied to detection of strength of concrete structure entities in the building industry, railway industry, traffic industry, water transportation industry, harborwork industry and the like.
Description
Technical field
The present invention relates to a kind of concrete strength detecting method and device, especially the detection method of concrete crushing strength and device.
Background technology
The method that detects at present concrete crushing strength has rebound method, core drilling method, Ultrasonic Resilience Comprehensive Method in Construction, rear anchoring method and cuts platen press.Following table is that the defective for above-mentioned method of testing principle and existence compares.
In sum, the present invention and the method that detects at present concrete crushing strength, its something in common all is to utilize concrete correlation properties, infers its compressive strength.But difference is that the method that detects at present concrete crushing strength is the intensity of the concrete surface of test mostly, although some is to not damage of concrete structure member, measuring accuracy is lower; Some measuring accuracy is higher, but the detected concrete structural elements is had than macrolesion, and is subject to testing the condition restriction such as Specimen Shape, location selection, test member compressive strength scope and member thickness.More based on the test process influence factor, often cause testing result inaccurate.For the defective that overcomes existing detection concrete crushing strength method existence and the accuracy that improves testing result, special proposition technical scheme of the present invention.
Summary of the invention
The purpose of this invention is to provide method and device that a kind of anti-folding method detects concrete crushing strength, solve existing concrete crushing strength method of testing and mostly tested member is had certain damage, be restricted more during test, the stress situation is complicated in the test process, often causes the inaccurate technical matters of test result.
For achieving the above object, the present invention adopts following technical scheme:
A kind of anti-folding method detects the method for concrete crushing strength, and step is as follows:
Step 3 increases pulling force gradually until anti-folding test specimen is fractureed, and reads the anti-folding peak F of the moment that fractures on the load table, subsequently, measures anti-folding test specimen incision position mutually vertically to diameter, calculates anti-folding area S, by the rupture strength computing formula
Determine the rupture strength of first anti-folding test specimen;
Step 4 repeats above-mentioned steps two and three, until determine the rupture strength of two other anti-folding test specimen;
Step 5, the strong formula of the survey that establishes in advance
, get the mean value of the rupture strength of above-mentioned three anti-folding test specimens determining
Organize the rupture strength typical value of anti-folding test specimen as this, set up correlationship with corresponding 150mm cube specimen compressive strength, thereby determine regression equation regression coefficient a, the concrete numerical value of b;
Wherein:
Be
Individual concrete component compressive strength scaled value (MPa);
A and b are the regression equation regression coefficient.
Described step 1 adopts hollow diamond when drilling through anti-folding test specimen, the internal diameter of described hollow diamond is not less than 44mm.
The device that the method for above-mentioned anti-folding method detection concrete crushing strength adopts, comprise anti-folding test specimen and anti-folding instrument, described anti-folding instrument is by supporting structure, measuring system and oil pump form, it is characterized in that: described supporting construction comprises top support plate, load base plate and cramp bar, described cramp bar props up and withstands between top support plate and the load base plate, described measuring system comprises the test specimen conduit, stayed mast, sensor, load table and anti-folding piece, described test specimen conduit is comprised of two sections canned paragraphs, wear anti-folding test specimen in it, described stayed mast passes top support plate by being with the jack web joint and being connected folding piece to connect, be installed with successively fastening nut on it from top to bottom, sensor and lifting jack, described lifting jack withstands on the end face of top support plate, described anti-folding piece is positioned in the middle of the anti-folding test specimen central section bottom surface, its two ends are fixedly connected with band jack web joint, described oil pump is hand oil pump, and its clutch end is connected with top support plate.
The canned paragraph of described test specimen conduit is fixed on the load base plate by weld seam.
Described anti-folding piece is bar dowel, and its axis is vertical with anti-folding test specimen axis.
Compared with prior art the present invention has following characteristics and beneficial effect:
The corresponding relation that the present invention sets up according to concrete axial compression strength and rupture strength standard value, drill through anti-folding test specimen at the structural elements entity, adopt anti-folding instrument antagonism folding test specimen to carry out bending test, infer concrete crushing strength by rupture strength and the prior strong formula of survey of setting up of concrete sample that bending test draws, this device is little to the destruction face of detected concrete, especially is fit to detect the concrete component of Reinforcing Bar with Dense Disposition.Owing to the fracture resistence force that is that test member is applied, the concrete destruction face is consistent with the fracture resistence force direction, reduces the influence factor in the test process, improved measuring accuracy, and test process is simple.
This method detection scope in the length of time is wide, and all anti-folding test specimens that can drill moulding can both carry out anti-folding method test.The earliest can be to 1 d, can be the stretch-draw of prestressed concrete and put and the early construction in the length of time of concrete provides technical guarantee; Detection applicable to the Structural Engineering concrete strength of C10-C100.
Method of testing of the present invention is not when having than macrolesion to the detected concrete structural elements, and the intensity that can test inside concrete is avoided tested member because inherent vice causes structural failure.
Hand oil pump is adopted in survey strong method of the present invention, is not subjected to tested structural concrete Components Shape is not particularly limited, and the test position is unrestricted, and the surface of on-the-spot test position need not to process, and the anti-folding test specimen that drills need not processed; The equipment light and flexible that adopts in addition is simple to operate, and accurate quick, cost are low.
The detection of the concrete structural solid strength of the industries such as the present invention can be widely used in building, railway, traffic, water transport, harbor work.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing.
Fig. 1 is proving installation structural representation of the present invention.
Fig. 2 is the schematic diagram of method of testing of the present invention.
Reference numeral: 1-fastening nut, 2-lifting jack, 3-top support plate, 4-cramp bar, 5-load base plate, the anti-folding test specimen of 6-, 6.1-supporting section, the 6.2-section of fractureing, 7-stayed mast, 8-sensor, 9-hand oil pump, 10-band jack web joint, 11-test specimen conduit, 11.1-canned paragraph, 12-weld seam, 13-load table, the anti-folding piece of 14-.
Embodiment
A kind of anti-folding method detects the method for concrete crushing strength, and step is as follows:
Step 3, increase pulling force gradually until anti-folding test specimen 6 is fractureed supporting section 6.1 and the section of fractureing 6.2 is referring to Fig. 2, and read the anti-folding peak F of the moment that fractures on the load table, subsequently, measure anti-folding test specimen incision position mutually vertically to diameter, calculate anti-folding area S, by the rupture strength computing formula
Determine the rupture strength of first anti-folding test specimen;
Step 4 repeats above-mentioned steps two and three, until determine the rupture strength of two other anti-folding test specimen;
Step 5, the strong formula of the survey that establishes in advance
, get the mean value of the rupture strength of above-mentioned three anti-folding test specimens determining
Organize the rupture strength typical value of anti-folding test specimen as this, set up correlationship with corresponding 150mm cube specimen compressive strength, thereby determine regression equation regression coefficient a, the concrete numerical value of b;
Wherein:
Be
Individual concrete component compressive strength scaled value MPa;
A and b are the regression equation regression coefficient.
For starting material commonly used, the strong formula of survey of determining by lot of experiments
The strong formula of above-mentioned survey is all applicable to general concrete component or structure.
Anti-folding test specimen is made and is required according to each department, starting material commonly used, different intensity grades, different making in the length of time, and anti-folding test specimen can drill at cube specimen.
The device that the method for above-mentioned anti-folding method detection concrete crushing strength adopts, referring to Fig. 1, comprise anti-folding test specimen 6 and anti-folding instrument, described anti-folding instrument is by supporting structure, measuring system and oil pump form, described supporting construction comprises top support plate 3, load base plate 5 and cramp bar 4,4 of described cramp bars withstand between top support plate 3 and the load base plate 5, described measuring system comprises test specimen conduit 11, stayed mast 7, sensor 8, load table 13 and anti-folding piece 14, described test specimen conduit 11 is comprised of two sections canned paragraphs 11.1, wear anti-folding test specimen 6 in it, described stayed mast passes top support plate 3 by being with jack web joint 10 and being connected folding piece 14 to connect, be installed with successively fastening nut 1 on it from top to bottom, sensor 8 and lifting jack 2, described lifting jack 2 withstands on the end face of top support plate 3, described anti-folding piece 14 is positioned in the middle of the anti-folding test specimen 6 central section bottom surfaces, its two ends are fixedly connected with band jack web joint 10, and described oil pump is hand oil pump 9, and its clutch end is connected with top support plate 3.
The canned paragraph 11.1 of described test specimen conduit 11 is fixed on the load base plate 5 by weld seam 12.
Described anti-folding piece 14 is bar dowel, and its axis is vertical with anti-folding test specimen axis.
Claims (5)
1. an anti-folding method detects the device of concrete crushing strength, comprise anti-folding test specimen (6) and anti-folding instrument, described anti-folding instrument is by supporting structure, measuring system and oil pump form, it is characterized in that: described supporting construction comprises top support plate (3), load base plate (5) and cramp bar (4), described cramp bar (4) props up and withstands between top support plate (3) and the load base plate (5), described measuring system comprises test specimen conduit (11), stayed mast (7), sensor (8), load table (13) and anti-folding piece (14), described test specimen conduit (11) is comprised of two sections canned paragraphs (11.1), wear anti-folding test specimen (6) in it, described stayed mast passes top support plate (3) by being with jack web joint (10) and being connected folding piece (14) to connect, be installed with successively fastening nut (1) on it from top to bottom, sensor (8) and lifting jack (2), described lifting jack (2) withstands on the end face of top support plate (3), described anti-folding piece (14) is positioned in the middle of anti-folding test specimen (6) the central section bottom surface, its two ends are fixedly connected with band jack web joint (10), described oil pump is hand oil pump (9), and its clutch end is connected with top support plate (3).
2. anti-folding method according to claim 1 detects the device of concrete crushing strength, and it is characterized in that: the canned paragraph (11.1) of described test specimen conduit (11) is fixed on the load base plate (5) by weld seam (12).
3. anti-folding method according to claim 1 detects the device of concrete crushing strength, it is characterized in that: described anti-folding piece (14) is bar dowel, and its axis is vertical with anti-folding test specimen axis.
4. an anti-folding method detects the method for concrete crushing strength, and application rights requires 1 or 2 or 3 described anti-folding methods to detect the device of concrete crushing strengths, and it is characterized in that: step is as follows:
Step 1 drills through 3 anti-folding test specimens (6) at random on detected concrete structure or member;
Step 2, first anti-folding test specimen is put into the test specimen conduit (11) that described anti-folding method detects the device of concrete crushing strength, to resist the middle section of folding test specimen (6) to be connected with stayed mast (7) by band jack web joint (10), and in the anti-folding piece of jack interpolation (14), startup hand oil pump (9) applies pulling force upwards for the middle section of anti-folding test specimen by stayed mast (7);
Step 3 increases pulling force gradually until anti-folding test specimen (6) is fractureed, and reads the anti-folding peak F of the moment that fractures on the load table, subsequently, measures anti-folding test specimen incision position mutually vertically to diameter, calculates anti-folding area S, by the rupture strength computing formula
Determine the rupture strength of first anti-folding test specimen;
Step 4 repeats above-mentioned steps two and three, until determine the rupture strength of two other anti-folding test specimen;
Step 5, the strong formula of the survey that establishes in advance
, get the mean value of the rupture strength of above-mentioned three anti-folding test specimens determining
Organize the rupture strength typical value of anti-folding test specimen as this, set up correlationship with corresponding 150mm cube specimen compressive strength, thereby determine regression equation regression coefficient a, the concrete numerical value of b;
Wherein:
Be
Individual concrete component compressive strength scaled value, MPa;
A and b are the regression equation regression coefficient.
5. anti-folding method according to claim 4 detects the method for concrete crushing strength, it is characterized in that: described step 1, adopt hollow diamond when drilling through anti-folding test specimen, and the internal diameter of described hollow diamond is not less than 44mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110282390 CN102435499B (en) | 2011-09-22 | 2011-09-22 | Method and device for detecting stress strength of concrete by bending method |
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| CN 201110282390 CN102435499B (en) | 2011-09-22 | 2011-09-22 | Method and device for detecting stress strength of concrete by bending method |
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| CN102435499A CN102435499A (en) | 2012-05-02 |
| CN102435499B true CN102435499B (en) | 2013-05-29 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721617A (en) * | 2012-07-11 | 2012-10-10 | 深圳中建院建筑科技有限公司 | Method for detecting concrete compression strength by using single shear method |
| CN103411831B (en) * | 2013-07-18 | 2015-07-15 | 王文明 | Intelligent detector for detecting compressive strength of concrete, and detection method thereof |
| CN103630445B (en) * | 2013-11-30 | 2016-08-17 | 安徽省（水利部淮河水利委员会）水利科学研究院 | A kind of concrete core sample bending testing device |
| CN107179234B (en) * | 2017-07-26 | 2019-06-07 | 广东丰业电力器材有限公司 | A kind of concrete Intensity of Breaking Tester |
| CN109916708B (en) * | 2019-03-21 | 2021-05-11 | 佛山市兴上宇不锈钢有限公司 | Bending strength detection device for stainless steel hollow pipe |
| CN111157343A (en) * | 2020-03-02 | 2020-05-15 | 河北省建筑科学研究院有限公司 | Method for measuring compressive strength of grouting material core sample |
| CN114778281A (en) * | 2022-06-06 | 2022-07-22 | 山东大学 | Method for automatically detecting strength of concrete sample and robot system |
| CN118190600B (en) * | 2024-05-17 | 2024-08-02 | 甘肃第四建设集团有限责任公司 | Method and system for detecting strength of building concrete |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050605U (en) * | 1989-04-29 | 1990-01-03 | 武昌区华安工程机械技术服务部 | 50kn precision bending resistance tester |
| CN2119654U (en) * | 1992-04-25 | 1992-10-21 | 江苏省建筑科学研究院 | Double-column anti-crimple tester for small beam test block of concrete |
| CN201653836U (en) * | 2010-05-07 | 2010-11-24 | 长安大学 | Concrete coarse aggregate interface bending intensity tester |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4060005B2 (en) * | 1999-04-14 | 2008-03-12 | 義隆 野口 | Concrete bending strength test roller and test apparatus using the same |
| JP2008076314A (en) * | 2006-09-22 | 2008-04-03 | Kochi Univ Of Technology | Concrete shearing testing method and shearing testing tool |
-
2011
- 2011-09-22 CN CN 201110282390 patent/CN102435499B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2050605U (en) * | 1989-04-29 | 1990-01-03 | 武昌区华安工程机械技术服务部 | 50kn precision bending resistance tester |
| CN2119654U (en) * | 1992-04-25 | 1992-10-21 | 江苏省建筑科学研究院 | Double-column anti-crimple tester for small beam test block of concrete |
| CN201653836U (en) * | 2010-05-07 | 2010-11-24 | 长安大学 | Concrete coarse aggregate interface bending intensity tester |
Non-Patent Citations (5)
| Title |
|---|
| JP特开2000-298089A 2000.10.24 |
| JP特开2008-76314A 2008.04.03 |
| 张忠苗 等.加强型预应力混凝土管桩抗弯剪性能试验研究.《浙江大学学报（工学版）》.2011,第45卷(第6期),1074-1080页. * |
| 肖建庄,李佳彬.再生混凝土强度指标之间换算关系的研究.《建筑材料学报》.2005,第8卷(第2期),197-201页. * |
| 陈海慧，李海燕.钻芯法检测混凝土强度及要注意的几个问题.《建筑监督检测与造价》.2009,第2卷(第1期),23-25页. * |
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