CN203719614U - Concrete free swell ratio and shrinking ratio testing device - Google Patents
Concrete free swell ratio and shrinking ratio testing device Download PDFInfo
- Publication number
- CN203719614U CN203719614U CN201420064287.XU CN201420064287U CN203719614U CN 203719614 U CN203719614 U CN 203719614U CN 201420064287 U CN201420064287 U CN 201420064287U CN 203719614 U CN203719614 U CN 203719614U
- Authority
- CN
- China
- Prior art keywords
- concrete
- testing
- end anchorage
- concrete free
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a concrete free swell ratio and shrinking ratio testing device comprising a testing die, two end head anchoring support racks, two displacement detection devices and two flexible plates, wherein the testing die is provided with a testing groove, the two end head anchoring support racks are placed in the testing groove, the two flexible plates are placed in the testing groove, the two flexible plates respectively and tightly cling to two horizontal inner side faces of the testing groove, two end faces of the two end head anchoring support racks are respectively abutted against corresponding flexible plates, the upper parts of the two end head anchoring support racks are provided with detection end heads which extend inwards in a lengthways manner, and the two displacement detection devices are abutted against corresponding detection end heads. The concrete free swell ratio and shrinking ratio testing device is characterized by high detection precision, and capability of continuously detecting concrete deformation performance.
Description
Technical field
The utility model relates to a kind of detection experimental apparatus of testing the plasticity of cement concrete material and the distortion of hardening phase.
Background technology
Cement concrete material is a kind of compound substance being formed by Binder Materials, coarse-fine aggregate, water and additive mix.Binder Materials slurry is due to plastic set contraction, autogenous shrinkage, chemical shrinkage, dry contraction in setting and harden process, and temperature variation all can cause drawdown deformation, thereby causes concrete shrinkage cracking, affects concrete permanance.At structure position expansive concrete materials used such as industrial pond, structures reinforcing band, concrete filled steel tubes, or pressure pipeline, grouting anchoring used from stress, self-compacting concrete material, again concrete expansion character is had higher requirements.Therefore, the accurate measurement of concrete material expansion or drawdown deformation has become the study hotspot in engineering research field.
Large quantity research shows, it is also very low early stage that the autogenous shrinkage of concrete material mainly betides intensity, and because fresh concrete is mecystasis, need after concrete coagulation is hardened to some strength (being generally moulding 24 hours) form removal, could measure the longitudinal length of test specimen, this just causes cannot effectively measure early plastic shrinkage distortion in the length of time and self-constriction distortion of concrete.About concrete shrinkage deformation method of testing, China's " Standard for test methods of longterm performance and durability of ordinary concrete standard " (GB/T 50082-2009) regulation point eyes with non-contact method and contact method.At present, the test unit that eyes with non-contact method can Gong be selected generally can only be surveyed concrete drawdown deformation; The concrete sample of contact method belt end used also can only be for the concrete material after sclerosis.
China's " Technical code for application of admixture in concrete " (GB 50119-2003) and " cement expansive material " (GB 23439-2009) recommend the limited expansion rate proving installation taking SP-540 type concrete comparator as representative, its weak point mainly contains: need to be with the test specimen of longitudinal limiter, comparator, par, a whole set of experimental facilities such as support, when each measurement, concrete sample must be placed on comparator support, after test, put back to again in constant temperature pond maintenance to next test the length of time, this just requires test specimen repeatedly to move on pond and comparator, test is wasted time and energy, and artificial interference is larger on measuring accuracy impact, secondly, existingly generally can only solely test constraint than regular way proving installation and expand or free expansion.Existing contactless concrete shrinkage deformation testing tool displacement transducer used is expensive, because die trial used is steel, rigidity is very large, can produce hoop effect to the concrete of dilatational strain, affect test result, therefore only can be used for testing concrete shrinkage deformation, for the bad adaptability of different pilot projects, experimental cost is higher.
Summary of the invention
The purpose of this utility model is to provide a kind of accuracy of detection high, can detect continuously concrete free swelling rate and the shrinkage factor proving installation of concrete deformation performance.
In order to achieve the above object, the technical solution of the utility model is: a kind of concrete free swelling rate and shrinkage factor proving installation, comprise die trial, two end anchorage supports and two displacement detectors, die trial is provided with test trough, two end anchorage supports are all placed in test trough, also there are two flexible boards, and two flexible boards are placed in test trough, and be close to two horizontal medial surfaces of test trough respectively, two end faces of two end anchorage supports offset with corresponding flexible board respectively, and the detection termination that stretch in being equipped with longitudinally on the top of two end anchorage supports, two displacement detectors offset with corresponding detection termination respectively.
Described displacement detector comprises fixed support, clock gauge and lock-screw, and support bracket fastened two ends are all by lock-screw and the load of die trial top, clock gauge and fixed support load, and clock gauge and detect termination and offset.
Described end anchorage support comprises a vertical spacing plate and two longitudinal bindings, and two longitudinal bindings are fixedly connected with the medial surface of vertical spacing plate.
Adopt after said structure, owing to also thering are two flexible boards, and two flexible boards are placed in test trough, and be close to two horizontal medial surfaces of test trough respectively, two end faces of two confinement plates offset with corresponding flexible board respectively, in concrete NDT process, concreting is entered in the test trough of die trial, concrete mix is full of between two end anchorage supports, after concrete hardening, just can observe at any time the numerical value change of displacement detector, because two transverse sides of concrete sample are provided with flexible board, therefore the transversal shrinkage of concrete sample in testing process and expansion can be not restricted, thereby can be more accurate in the time that displacement detector detects concrete longitudinal deformation amount, improve accuracy of detection, the detection termination of stretching in being equipped with longitudinally due to the top of two end anchorage supports again, two displacement detectors offset with corresponding detection termination respectively, therefore when concrete coagulation hardens into after test specimen, each parts of the utility model form an entirety, its entirety can be placed in constant temperature pond, surface level submergence concrete sample in constant temperature pond, but can be higher than the height of pick-up unit, therefore the utility model can ensure that concrete is under the foster condition of water, without repeatedly moving, just can from concreting, start to detect continuously the deformation performance of concrete sample.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the vertical view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Referring to Fig. 1, shown in 2, (in accompanying drawing 2, X is to representing laterally, Y-direction represents longitudinally) a kind of concrete free swelling rate and shrinkage factor proving installation, comprise die trial 1, two end anchorage supports 2 and two displacement detectors 3, die trial 1 is provided with test trough 1-1, two end anchorage supports 2 are all placed in test trough 1-1, also there are two flexible boards 4, and two flexible boards 4 are placed in test trough 1-1, and be close to two horizontal medial surfaces of test trough 1-1 respectively, two end faces of two end anchorage supports 2 offset with corresponding flexible board 4 respectively, and the detection termination 2-1 that stretch in being equipped with longitudinally on the top of two end anchorage supports 2, two displacement detectors 3 offset with corresponding detection termination 2-1 respectively.
Shown in Figure 1, in order conveniently to adjust clock gauge 3-2 before detection, described displacement detector 3 comprises fixed support 3-1, clock gauge 3-2 and lock-screw 3-3, the two ends of fixed support 3-1 are all by lock-screw 3-3 and die trial 1 top load, clock gauge 3-2 and fixed support 3-1 load, and clock gauge 3-2 offsets with detecting termination 2-1-1, and fixed support 3-1 can move in die trial 1, and locks by lock-screw 3-3.
Shown in Fig. 1,2, described flexible board 4 is polystyrene board, the sheet material that can certainly adopt other flexible materials to make.
Shown in Fig. 1,2, described end anchorage support 2 comprises a vertical spacing plate 2-2 and two longitudinal binding 2-3, two longitudinal binding 2-3 are fixedly connected with the medial surface of vertical spacing plate 2-2, when after concrete sample 5 sclerosis, two longitudinal binding 2-3 can be closely fixing with concrete sample 5, improve structural strength of the present utility model, convenient mobile.
Referring to Fig. 1, shown in 2, the utility model is the Testing apparatus of measuring concrete free swelling rate and shrinkage factor, on horizontal two inwalls of test trough 1-1 that two flexible boards 4 are close to respectively to die trial 1, brushing one deck release agent on flexible board 4 again, preferably repave last layer polystyrene plastics film, the convenient demoulding from now on, two end anchorage supports 2 are separately placed in test trough 1-1, then just can the concrete being stirred will be built between end anchorage support 2, carry out again concrete jolt ramming and strike off, after concrete hardening, just form concrete sample 5, whole die trial 1 is positioned in pond, then fixed support 3-1 is moved, adjust the initial position of clock gauge 3-2, locking lock-screw 3-3, water filling in past pond, until the just surface of submergence concrete sample 5 of water surface S, record the initial reading of clock gauge 3-2, treat concrete hardening to next test the length of time (test the length of time be the interval time of national Specification test), gather again the reading of clock gauge 3-2, and calculate concrete expansivity or shrinkage factor, if detect dry expansion rate or the shrinkage factor of concrete sample 5, only the water in pond need be discharged.
The transversal shrinkage of concrete sample 5 of the present utility model in testing process and expansion can be not restricted, reason is that the transverse side of concrete sample 5 has flexible board 4, flexible board 4 can confined concrete test specimen 5 lateral expansion power, thereby more accurate in the time that displacement detector 3 detects the linear deformation of concrete sample 5, improve accuracy of detection; Concrete sample 5 is with mould test all the time, having overcome common test device needs concrete to reach the drawback that some strength can form removal be measured, can after completing, concreting start test, the spontaneous expansion (or contraction) early stage and the later stage of all-the-way tracking concrete is out of shape, in concrete formation, maintenance, measuring process, needn't move continually test specimen, also needn't test all at every turn and compare length with par, test procedure is greatly simplified, thereby can alleviate experimenter's working strength.
Certainly clock gauge 3-2 also can change photooptical data acquisition system into, can realize automatic collection and the record of concrete deformation data, exempts the trouble of artificial timing reading, improves measuring accuracy.
Claims (4)
1. a concrete free swelling rate and shrinkage factor proving installation, comprise die trial (1), two end anchorage supports (2) and two displacement detectors (3), die trial (1) is provided with test trough (1-1), two end anchorage supports (2) are all placed in test trough (1-1), it is characterized in that: also there are two flexible boards (4), and two flexible boards (4) are placed in test trough (1-1), and be close to two horizontal medial surfaces of test trough (1-1) respectively, two end faces of two end anchorage supports (2) offset with corresponding flexible board (4) respectively, and the detection termination (2-1) that stretch in being equipped with longitudinally on the top of two end anchorage supports (2), two displacement detectors (3) offset with corresponding detection termination (2-1) respectively.
2. concrete free swelling rate according to claim 1 and shrinkage factor proving installation, it is characterized in that: described displacement detector (3) comprises fixed support (3-1), clock gauge (3-2) and lock-screw (3-3), the two ends of fixed support (3-1) are all by lock-screw (3-3) and die trial (1) top load, clock gauge (3-2) and fixed support (3-1) load, and clock gauge (3-2) offsets with detection termination (2-1-1).
3. concrete free swelling rate according to claim 1 and shrinkage factor proving installation, is characterized in that: described flexible board (4) is polystyrene board.
4. concrete free swelling rate according to claim 1 and shrinkage factor proving installation, it is characterized in that: described end anchorage support (2) comprises a vertical spacing plate (2-2) and two longitudinal bindings (2-3), two longitudinal bindings (2-3) are fixedly connected with the medial surface of vertical spacing plate (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064287.XU CN203719614U (en) | 2014-02-12 | 2014-02-12 | Concrete free swell ratio and shrinking ratio testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420064287.XU CN203719614U (en) | 2014-02-12 | 2014-02-12 | Concrete free swell ratio and shrinking ratio testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203719614U true CN203719614U (en) | 2014-07-16 |
Family
ID=51158756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420064287.XU Expired - Fee Related CN203719614U (en) | 2014-02-12 | 2014-02-12 | Concrete free swell ratio and shrinking ratio testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203719614U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280290A (en) * | 2014-09-26 | 2015-01-14 | 同济大学 | Device for testing stress-strain of plastic concrete/mortar and use method of device |
| CN104406650A (en) * | 2014-12-01 | 2015-03-11 | 中建材中岩科技有限公司 | Device and method for measuring free swell ratio of slurry |
| CN104614507A (en) * | 2015-01-30 | 2015-05-13 | 武汉三源特种建材有限责任公司 | Determination method for restrained expansion rate and expansion rate of expansive concrete from plasticity to hardening |
| CN105548202A (en) * | 2016-01-15 | 2016-05-04 | 常州工学院 | Automatic concrete shrinkage crack monitoring system |
| CN106706890A (en) * | 2017-02-24 | 2017-05-24 | 徐工集团工程机械有限公司 | Asphalt foaming effect measuring device and method |
| CN107271648A (en) * | 2017-07-11 | 2017-10-20 | 中国京冶工程技术有限公司 | Consider the shrinkage stress measurement apparatus of concrete creep influence |
| CN108775855A (en) * | 2018-07-16 | 2018-11-09 | 哈尔滨工业大学 | The measuring device of through-hole hoop strain during a kind of static crushing |
| CN110412251A (en) * | 2019-05-17 | 2019-11-05 | 中铁十七局集团第二工程有限公司 | A kind of cement paste shrinkage character test measurement method and device |
| CN110907488A (en) * | 2019-12-27 | 2020-03-24 | 哈尔滨工业大学 | Concrete freezing degree detection device and detection method thereof |
-
2014
- 2014-02-12 CN CN201420064287.XU patent/CN203719614U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280290A (en) * | 2014-09-26 | 2015-01-14 | 同济大学 | Device for testing stress-strain of plastic concrete/mortar and use method of device |
| CN104406650A (en) * | 2014-12-01 | 2015-03-11 | 中建材中岩科技有限公司 | Device and method for measuring free swell ratio of slurry |
| CN104406650B (en) * | 2014-12-01 | 2017-10-31 | 中建材中岩科技有限公司 | A kind of apparatus and method for determining slurry free swelling rate |
| CN104614507A (en) * | 2015-01-30 | 2015-05-13 | 武汉三源特种建材有限责任公司 | Determination method for restrained expansion rate and expansion rate of expansive concrete from plasticity to hardening |
| CN105548202A (en) * | 2016-01-15 | 2016-05-04 | 常州工学院 | Automatic concrete shrinkage crack monitoring system |
| CN106706890A (en) * | 2017-02-24 | 2017-05-24 | 徐工集团工程机械有限公司 | Asphalt foaming effect measuring device and method |
| CN106706890B (en) * | 2017-02-24 | 2023-07-04 | 江苏徐工工程机械研究院有限公司 | Asphalt foaming effect measuring device and method |
| CN107271648A (en) * | 2017-07-11 | 2017-10-20 | 中国京冶工程技术有限公司 | Consider the shrinkage stress measurement apparatus of concrete creep influence |
| CN108775855A (en) * | 2018-07-16 | 2018-11-09 | 哈尔滨工业大学 | The measuring device of through-hole hoop strain during a kind of static crushing |
| CN110412251A (en) * | 2019-05-17 | 2019-11-05 | 中铁十七局集团第二工程有限公司 | A kind of cement paste shrinkage character test measurement method and device |
| CN110907488A (en) * | 2019-12-27 | 2020-03-24 | 哈尔滨工业大学 | Concrete freezing degree detection device and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203720174U (en) | Concrete restrained expansion rate testing device | |
| CN203719614U (en) | Concrete free swell ratio and shrinking ratio testing device | |
| CN101738459B (en) | Expansion/shrinkage stress testing device for cement-based material | |
| Drougkas et al. | Compressive strength and elasticity of pure lime mortar masonry | |
| CN204439474U (en) | The field direct shear test device of landslide rock mass shearing strength | |
| CN101819135A (en) | Method for measuring bond strength between high-intensity glass fiber rib and concrete | |
| CN203101381U (en) | Novel concrete early-age shrinkage deformation tester | |
| CN102608296B (en) | Device and method for simulating and monitoring expanding and cracking of concrete | |
| CN102866245B (en) | Test method and test device for unrestraint measurement of concrete deformation performance | |
| CN104264678B (en) | Concrete in mass Anti-cracking construction technology | |
| CN106841277B (en) | Saline soil expansion deformation and expansion force measuring equipment | |
| CN1243237C (en) | Cement mortar and concrete shrinkage stress testing method | |
| CN105548243A (en) | Method for detecting oil-well cement expansion rate | |
| CN205581106U (en) | A device for testing self -compaction microdilatancy steel pipe concrete expansion rate | |
| CN104807982A (en) | Method for determining final setting time of concrete based on strain sensors | |
| CN100554929C (en) | A kind of quick measurement-infer method of soil cement intensity | |
| CN102539312A (en) | Method and device for testing asphalt forming characteristics | |
| CN201247042Y (en) | Device for measuring early age period linear deformation of cement based material | |
| CN1928553A (en) | Method and device for measuring initial and final set time for non-damage type concrete | |
| RU194372U1 (en) | Performance bench for quick setting cement | |
| CN112379084A (en) | Concrete performance detection method | |
| CN204154717U (en) | Concrete limited expansion rate proving installation | |
| CN101776430B (en) | Method for measuring hydration heat temperature restraint strain of wall by using vibrating string extensometer | |
| CN104374897A (en) | Method for determining early-stage concrete crack resistance by adopting elliptical ring test specimen | |
| CN205448910U (en) | Accuracy is measurationed prestressing force aqueduct hoop or vertical prestressing tendons and is returned device of volume of contracting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: City, Jiangsu work builds Science and Technology Ltd. Assignor: Changzhou Polytechnic College Contract record no.: 2015320010088 Denomination of utility model: Concrete free swell ratio and shrinking ratio testing device Granted publication date: 20140716 License type: Exclusive License Record date: 20150603 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20160212 |
|
| EC01 | Cancellation of recordation of patent licensing contract | ||
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: City, Jiangsu work builds Science and Technology Ltd. Assignor: Changzhou Polytechnic College Contract record no.: 2015320010088 Date of cancellation: 20190103 |