CN204008566U - Utilize the natural frequency of vibration of cement-based material to detect the device of its setting time - Google Patents
Utilize the natural frequency of vibration of cement-based material to detect the device of its setting time Download PDFInfo
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- CN204008566U CN204008566U CN201420437396.1U CN201420437396U CN204008566U CN 204008566 U CN204008566 U CN 204008566U CN 201420437396 U CN201420437396 U CN 201420437396U CN 204008566 U CN204008566 U CN 204008566U
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- 239000000463 material Substances 0.000 title claims abstract description 26
- 239000004568 cement Substances 0.000 title claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 72
- 239000011159 matrix material Substances 0.000 claims abstract description 53
- 239000004567 concrete Substances 0.000 claims description 12
- 239000011440 grout Substances 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 19
- 230000035515 penetration Effects 0.000 description 7
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of natural frequency of vibration of utilizing cement-based material detects the device of its setting time, comprise die trial, die trial is in-built initial set matrix test specimen to be measured, the top center of initial set matrix test specimen is provided with vibration transducer, the tail cone of vibration transducer is fixed in initial set matrix test specimen, vibration transducer is connected to vibration data collector, the top, edge of initial set matrix test specimen is provided with vibrator, vibrator with for control its regularly the FPGA module of exciting be connected, vibration data collector and FPGA module are connected respectively to industrial computer.The utility model is incorporated into the natural frequency of vibration in the test of setting time, by the natural frequency of vibration, detects setting time, and principle is more scientific rationally; And the operation of device is reasonable, has reduced the impact of human factor, time saving and energy saving, can improve detection efficiency.
Description
Technical field
The utility model relates to building materials Performance Detection, is specially method and device that a kind of natural frequency of vibration of utilizing cement-based material detects its setting time.
Background technology
The method that the setting time of the cement-based materials such as test fresh concrete, mortar and grout, employing was pressed into material certain depth by chaining pin is conventionally carried out.The penetration resistance method of using while measuring such as concrete coagulating time, be exactly repeatedly that the chaining pin pressing in sample 25mm of regulation shape is dark in concrete coagulation process, thereby record penetration resistance, to penetration resistance measured value be 3.5MPa, think and arrive the presetting period, to penetration resistance measured value be 28MPa, think arrival final setting time.This method is affected by human factors greatly, and measuring accuracy is not high; In test process, need manually repeatedly to move initial set matrix test specimen, press chaining pin, read and record data, and need long-time on duty the waiting for of tester, sometimes setting time long, the time on duty reaches more than 40 individual hour, wastes time and energy.
Summary of the invention
The purpose of this utility model is for above problem, provide a kind of natural frequency of vibration of utilizing cement-based material to detect the device of its setting time, can improve the measuring accuracy of setting time of cement-based material, realize automatic test, reduce interference from human factor, alleviate tester's manual labor, avoid long-time on duty waiting for.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is, the utility model provides a kind of device that utilizes said method to test, comprise die trial, die trial is in-built initial set matrix test specimen to be measured, the top center of initial set matrix test specimen is provided with vibration transducer, the tail cone of vibration transducer is fixed in initial set matrix test specimen, vibration transducer is connected to vibration data collector, the top, edge of initial set matrix test specimen is provided with vibrator, vibrator with for control its regularly the FPGA module of exciting be connected, vibration data collector and FPGA module are connected respectively to industrial computer.
Described die trial is rectangular-shaped, and it is of a size of long 300mm, wide 150mm, and high 150mm, die trial top is opened wide.
Described vibration transducer is vibrating speed sensors, vibration acceleration sensor or vibration displacement sensor.The sample frequency of vibration data collector should be set to be greater than 2.5 times of the initial set matrix test specimen final set natural frequency of vibration, conventionally can be set to 5 to 10 times.Such sample frequency meets sampling thheorem, can guarantee to analyze the waveform from collecting the correct initial set natural frequency of vibration and the final set natural frequency of vibration.
Described vibrator is electromagnetic exciter.The base plate diameter of its cylindrical outer casing is 50mm to 80mm.
Between described vibrator and initial set matrix test specimen, be provided with scraps of paper layer or thin layer, prevent the bonding on vibrator and initial set matrix test specimen surface.
The matrix test specimen that described initial set matrix test specimen adopts fresh concrete, mortar, grout to make.The rectangular parallelepiped initial set matrix test specimen that adopts cement-based material to be made into, its natural frequency of vibration is relevant with its size, elastic modulus and deadweight, at these, affect in parameter, size immobilizes, and conducts oneself with dignity relatively stable, and the most obvious parameter of impact is elastic modulus, and it is large that elastic modulus becomes gradually with the increase of the setting time of material, so in theory, the natural frequency of vibration can be used as a kind of reflection of condensation of materials state, by the natural frequency of vibration, tests and has feasibility setting time.And cement-based material can be divided three classes, concrete, mortar and grout, the feature of the coagulated state of this three classes material has clearly regulation in its original method of testing separately, such as concrete: the judging characteristic regulation of initial set state reaches 3.5MPa for penetration resistance, and final set state is that penetration resistance reaches 28MPa; Mortar: coagulated state is stipulated to reach 0.5MPa for penetration resistance; Grout: the judging characteristic regulation of initial set state sinks in material apart from base plate 4 ± 1mm for the chaining pin of 300g quality, and the judging characteristic of final set state is stipulated to sink in material apart from base plate 0.5mm for the chaining pin of 300g quality.
With the method test setting time of frequency, with the original the same feature of regulation coagulated state in advance that also needs of method, the natural frequency of vibration of initial set matrix test specimen reaches while how to be worth and is judged as condensation of materials, and this natural frequency of vibration value is a fixed value.For obtaining the natural frequency of vibration value that condensation of materials state is corresponding, with existing setting time assay method and the method with frequency measurement setting time that proposes now same material is tested to comparison simultaneously.In theory, for any one in the concrete in cement-based material, mortar and grout, even the match ratio of constituent is different, when it reaches the coagulated state of existing regulation and stipulation, its elastic modulus should be a relatively stable value, and the density of adding same class material is basicly stable, and initial set matrix sample dimensions is fixed, so, under its regulation coagulated state, the natural frequency of vibration of initial set matrix test specimen should be relatively stable, and amplitude of variation is little, test findings also finds, the way it goes.Like this, each the class material in concrete, mortar and grout, is used different match ratios, repeatedly compares respectively test, gets its mean value, can be used as each the class cement-based material initial set natural frequency of vibration, final set natural frequency of vibration separately.These frequency values can stipulate in the mode of testing regulations, in the industry.
Cement-based material, existing setting time of the method for testing that comprises concrete, mortar and grout, all chaining pin repeatedly to be pressed into initial set matrix test specimen to certain depth, on initial set matrix test specimen surface, leave a plurality of holes, like this, while being again pressed into chaining pin, original hole can have influence on the accuracy of up-to-date measured value; The initial set matrix test specimen that some setting time is long especially, test does not also finish, and initial set matrix test specimen surface has been covered with hole, to such an extent as to can not find new chaining pin, is pressed into position, and test cannot be carried out; During due to making initial set matrix test specimen there is unevenness in inner federation, so even the measured value at same time point different test position place on same initial set matrix test specimen also can exist relatively big difference; The restriction of tested person method, original method and device are more suitable for manual operations, and chaining pin press-in speed and compression distance are by manual control, poor stability; Manually read measured value, and device for measuring force is in the shake of chaining pin process of press in pointer, affects again the accuracy of test result; In test process, need to be manually on duty for a long time, what have will reach dozens of hour, lose time, waste of manpower; Be pressed into each time chaining pin, all need manually to move initial set matrix test specimen, adjust position, labour intensity is large.
The utlity model has following beneficial effect:
This device, by the natural frequency of vibration of test initial set matrix test specimen, is realized the test to setting time, has made up existing methodical deficiency.Due to this device to test be the natural frequency of vibration of whole initial set matrix test specimen, reflect the characteristic of whole initial set matrix test specimen, measured value has more representativeness.Compare original proving installation and method and reduced the disturbance to initial set matrix test specimen, increased the correctness of measured value; Needn't frequently move initial set matrix test specimen, save muscle power; Artificial reading, the error of having avoided artificial reading to bring; Need not be manually on duty for a long time, saving of work and time.
Accompanying drawing explanation
The structural representation of the proving installation that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with embodiment, further illustrate the utility model, but the claimed scope of the utility model is not limited to the scope of embodiment statement.
Embodiment 1:
As shown in Figure 1, a kind of natural frequency of vibration of utilizing cement-based material detects the device of its setting time, comprise die trial 7, die trial 7 is in-built initial set matrix test specimen 6 to be measured, the top center of initial set matrix test specimen 6 is provided with vibration transducer 1, the tail cone of vibration transducer 1 is fixed in initial set matrix test specimen 6, and vibration transducer 1 is connected to vibration data collector 3; The Surface Contact of vibrator 2 and initial set matrix test specimen 6, vibrator 2 with for controlling the FPGA module 4 of its timing exciting, be connected, vibration data collector 3 and FPGA module 4 are connected respectively to industrial computer 5.
Described die trial 7 is rectangular-shaped, and it is of a size of long 300mm, wide 150mm, and high 150mm, die trial 7 tops are opened wide.
Described vibration transducer 1 is vibrating speed sensors, vibration acceleration sensor or vibration displacement sensor.The frequency band of vibration transducer should be able to comprise the initial set natural frequency of vibration and the final set natural frequency of vibration.
Described vibrator 2 is electromagnetic exciter, and the base plate diameter of its cylindrical outer casing is 50mm to 80mm; The hitting dynamics of vibrator is 0.3kgf to 1kgf.
Between described vibrator 2 and initial set matrix test specimen 6, be provided with scraps of paper layer or thin layer, prevent that both from boning.
The matrix test specimen that described initial set matrix test specimen 6 adopts fresh concrete, mortar, grout to make.
Described die trial 7 is rectangular-shaped, and it is of a size of long 300mm, wide 150mm, and high 150mm, die trial 7 tops are opened wide.
Described FPGA module can directly be purchased from the market, as the Cyclone II series EP2C5Q208 type of ALTERA producer, the folding of the relay of FPGA module is controlled by industrial computer, industrial computer is controlled vibration data collector and is carried out test jobs, and can receive, stores and analyze vibration data.
Principle of work: adopt industrial computer to control the time interval of exciting, by FPGA module controls vibrator, regularly initial set matrix test specimen is carried out to exciting, simultaneously, vibration data collector gathers the vibration of initial set matrix test specimen by vibration transducer, the data that collect are passed to industrial computer, then by industrial computer, the vibration data and the time that gather are processed, can obtain the graph of relation of the natural frequency of vibration and time, finally, by the initial set natural frequency of vibration and the final set natural frequency of vibration, obtain corresponding presetting period point and final setting time point.
Embodiment 2:
The utility model provides a kind of natural frequency of vibration of utilizing cement-based material to detect the device of its setting time, comprises die trial, and described die trial is rectangular-shaped, and top is opened wide; Die trial is in-built initial set matrix test specimen to be measured, the top center of initial set matrix test specimen is provided with vibration transducer, the tail cone of vibration transducer is fixed in initial set matrix test specimen, and vibration transducer is connected to vibration data collector, and vibration data collector is connected to industrial computer; Vibrator is arranged at the surface of initial set matrix test specimen, between vibrator and initial set matrix test specimen, is also provided with scraps of paper layer or thin layer, prevents that both from boning, the matrix test specimen of described initial set matrix test specimen for adopting fresh concrete, mortar, grout to make.
Further, described die trial is rectangular-shaped, and it is of a size of long 300mm, wide 150mm, high 150mm.The 150mm cube die trial that this size and existing method are used is more approaching, select this size to be easy to integrate with existing method, also the layout that is suitable for vibrator and general vibration transducer, this die trial has ready-made product on market in addition, does not need design processing in addition.Other die trial with the similar size of these features also can be used.
Further, described vibration transducer is vibrating speed sensors, vibration acceleration sensor or vibration displacement sensor.The frequency band of vibration transducer should be able to comprise the initial set natural frequency of vibration and the final set natural frequency of vibration.
Further, described vibrator is electromagnetic exciter, and the base plate diameter of its cylindrical outer casing is 50mm to 80mm; The hitting dynamics of vibrator is 0.3kgf to 1kgf.
In addition, the utility model also can not adopt FPGA module and industrial computer to control, directly by manual control vibrator, carry out timing exciting, and the data that vibration transducer 1 is gathered are carried out record, finally process the graph of relation that obtains the natural frequency of vibration and time, by the initial set natural frequency of vibration and the final set natural frequency of vibration, obtain corresponding presetting period point and final setting time point.
Claims (6)
1. the natural frequency of vibration of utilizing cement-based material detects the device of its setting time, it is characterized in that: comprise die trial (7), die trial (7) is in-built initial set matrix test specimen (6) to be measured, the top center of initial set matrix test specimen (6) is provided with vibration transducer (1), the tail cone of vibration transducer (1) is fixed in initial set matrix test specimen (6), and vibration transducer (1) is connected to vibration data collector (3); The Surface Contact of vibrator (2) and initial set matrix test specimen (6), vibrator (2) with for controlling the FPGA module (4) of its timing exciting, be connected, vibration data collector (3) and FPGA module (4) are connected respectively to industrial computer (5).
2. device according to claim 1, is characterized in that: described die trial (7) is for rectangular-shaped, and it is of a size of long 300mm, wide 150mm, and high 150mm, die trial (7) top is opened wide.
3. device according to claim 1, is characterized in that: described vibration transducer (1) is vibrating speed sensors, vibration acceleration sensor or vibration displacement sensor.
4. device according to claim 1, is characterized in that: described vibrator (2) is electromagnetic exciter, and the base plate diameter of its cylindrical outer casing is 50mm to 80mm.
5. according to the device one of claim 1-4 Suo Shu, it is characterized in that: between described vibrator (2) and initial set matrix test specimen (6), be provided with scraps of paper layer or thin layer.
6. according to the device one of claim 1-4 Suo Shu, it is characterized in that: the matrix test specimen that described initial set matrix test specimen (6) adopts fresh concrete, mortar, grout to make.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437396.1U CN204008566U (en) | 2014-08-04 | 2014-08-04 | Utilize the natural frequency of vibration of cement-based material to detect the device of its setting time |
| PCT/CN2015/074561 WO2016019727A1 (en) | 2014-08-04 | 2015-03-19 | Device utilizing natural vibration frequency of cement-based material to detect setting time thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437396.1U CN204008566U (en) | 2014-08-04 | 2014-08-04 | Utilize the natural frequency of vibration of cement-based material to detect the device of its setting time |
Publications (1)
| Publication Number | Publication Date |
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| CN204008566U true CN204008566U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420437396.1U Expired - Fee Related CN204008566U (en) | 2014-08-04 | 2014-08-04 | Utilize the natural frequency of vibration of cement-based material to detect the device of its setting time |
Country Status (2)
| Country | Link |
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| CN (1) | CN204008566U (en) |
| WO (1) | WO2016019727A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198588A (en) * | 2014-08-04 | 2014-12-10 | 葛洲坝集团试验检测有限公司 | Method and device for detecting coagulation time of cement-based material by using self-vibration frequency of cement-based material |
| CN113092733A (en) * | 2021-03-25 | 2021-07-09 | 北新建材(天津)有限公司 | Anti-casting machine detection system and anti-casting machine method of mixing machine |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113624626B (en) * | 2021-07-22 | 2024-05-07 | 四川省机械研究设计院(集团)有限公司 | System and method for detecting setting and hardening of gypsum cementing material |
| CN114136839B (en) * | 2021-12-07 | 2024-05-24 | 中交第一航务工程局有限公司 | Concrete coagulation status testing device and method |
| WO2024129702A1 (en) * | 2022-12-12 | 2024-06-20 | Board Of Regents For The Oklahoma Agricultural And Mechanical Colleges | Apparatus and method for measuring workability of concrete |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611900Y (en) * | 2003-05-09 | 2004-04-14 | 付汉生 | Automatic analyzer for cement coagulation time |
| CN200953020Y (en) * | 2006-09-14 | 2007-09-26 | 中国建筑材料科学研究总院 | Equipment for automatic measuring cement coagulating time |
| CN101271101A (en) * | 2007-03-19 | 2008-09-24 | 青岛科技大学 | Measuring apparatus for cement standard consistency and setting time |
| CN102590483B (en) * | 2011-12-29 | 2015-12-16 | 江苏苏博特新材料股份有限公司 | The method of testing of setting time of cement-based material |
| JP2015507184A (en) * | 2011-12-30 | 2015-03-05 | 江蘇博特新材料有限公司Ｊｉａｎｇｓｕ Ｂｏｔｅ Ｎｅｗ Ｍａｔｅｒｉａｌｓ Ｃｏ．，Ｌｔｄ | Cement-based material setting time test method |
| JP5822202B2 (en) * | 2012-02-02 | 2015-11-24 | 清水建設株式会社 | Concrete quality control test method |
| CN203203990U (en) * | 2013-01-07 | 2013-09-18 | 中铁隧道集团有限公司 | Testing device for cement setting time under high-temperature condition |
| CN103163284A (en) * | 2013-02-27 | 2013-06-19 | 浙江土工仪器制造有限公司 | Tester of cement setting time |
| CN104198588B (en) * | 2014-08-04 | 2016-06-29 | 葛洲坝集团试验检测有限公司 | The natural frequency of vibration utilizing cement-based material detects method and the device of its setting time |
-
2014
- 2014-08-04 CN CN201420437396.1U patent/CN204008566U/en not_active Expired - Fee Related
-
2015
- 2015-03-19 WO PCT/CN2015/074561 patent/WO2016019727A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198588A (en) * | 2014-08-04 | 2014-12-10 | 葛洲坝集团试验检测有限公司 | Method and device for detecting coagulation time of cement-based material by using self-vibration frequency of cement-based material |
| CN104198588B (en) * | 2014-08-04 | 2016-06-29 | 葛洲坝集团试验检测有限公司 | The natural frequency of vibration utilizing cement-based material detects method and the device of its setting time |
| CN113092733A (en) * | 2021-03-25 | 2021-07-09 | 北新建材(天津)有限公司 | Anti-casting machine detection system and anti-casting machine method of mixing machine |
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| Publication number | Publication date |
|---|---|
| WO2016019727A1 (en) | 2016-02-11 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20170804 |
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| CF01 | Termination of patent right due to non-payment of annual fee |