CN204154717U - Concrete limited expansion rate proving installation - Google Patents
Concrete limited expansion rate proving installation Download PDFInfo
- Publication number
- CN204154717U CN204154717U CN201420610034.8U CN201420610034U CN204154717U CN 204154717 U CN204154717 U CN 204154717U CN 201420610034 U CN201420610034 U CN 201420610034U CN 204154717 U CN204154717 U CN 204154717U
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- CN
- China
- Prior art keywords
- wheel hub
- accurate measurement
- measurement device
- concrete
- confinement
- 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
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- 239000004567 concrete Substances 0.000 title claims abstract description 39
- 238000009434 installation Methods 0.000 title claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 20
- 238000005259 measurement Methods 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 5
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011376 self-consolidating concrete Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a kind of concrete limited expansion rate proving installation, comprise test flume, the longitudinal restraint device be located in test flume, the data acquisition unit that is arranged on the displacement accurate measurement device on longitudinal restraint device and is connected with displacement accurate measurement device; Described longitudinal restraint device comprises two pieces of confinement plates be arranged in parallel, be fixedly connected with by reinforcing bar between two pieces of confinement plates, described displacement accurate measurement device comprises wheel hub, the bracing wire be coiled in the rotating shaft of wheel hub, the precision rotation inductor be connected with wheel hub and the constant force spring acting on wheel hub rotating shaft, described displacement accurate measurement device is fixed on the upper end of one piece of confinement plate, and the free end of bracing wire is fixed on the upper end of another block confinement plate; Described data acquisition unit is electrically connected with precision rotation inductor.The utility model structure is simple, easy to operate, can accurately detect concrete distortion, avoids the artificial mobile error brought, and realizes continuing automatically to detect the deformation performance of concrete from plastic stage to hardening phase.
Description
Technical field
The utility model relates to a kind of experimental apparatus detecting concrete plasticity and hardening phase deflection, refers to a kind of concrete limited expansion rate proving installation particularly.
Background technology
Cement concrete material is a kind of compound substance by Binder Materials, coarse-fine aggregate, water and additive mix.Binder Materials slurry in setting and harden process due to plastic set contraction, autogenous shrinkage, chemical shrinkage, dry to shrink, and temperature variation all can cause drawdown deformation, thus causes concrete shrinkage cracking, affects concrete permanance.At the expansive concrete material that the structure positions such as industrial pond, structures reinforcing band, concrete filled steel tube are used, or pressure pipeline, grouting anchoring seif-citing rate, self-compacting concrete material used, 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 due to fresh concrete be mecystasis, need be hardened to some strength (being generally shaping 24 hours) until concrete coagulation and could measure the longitudinal length of test specimen after form removal, this just causes effectively cannot measure concrete early plastic shrinkage distortion in the length of time and self-constriction distortion.About concrete shrinkage deformation method of testing, China " 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 for be selected generally can only survey concrete drawdown deformation; The concrete sample of contact method belt end used also can only for the concrete material after sclerosis.
" cement expansive material " (GB23439-2009) adopts the method for limited expansion rate to characterize to concrete expansion character, concrete expansion is utilized to drive longitudinal limiter to produce distortion, limited expansion rate is tested by clock gauge, concrete sample must be placed on comparator support during each measurement, put back to maintenance in constant temperature pond after test again and test the length of time to next, 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.
Utility model content
The purpose of this utility model is to waste time and energy for testing concrete expansion character in prior art, the defect that measuring accuracy is not high, a kind of concrete limited expansion rate proving installation is provided, eliminates the troublesome operation of a dead lift test specimen, improve measuring accuracy.
For achieving the above object, concrete limited expansion rate proving installation designed by the utility model, comprises test flume, the longitudinal restraint device be located in test flume, the data acquisition unit that is arranged on the displacement accurate measurement device on longitudinal restraint device and is connected with displacement accurate measurement device; Described longitudinal restraint device comprises two pieces of confinement plates be arranged in parallel, and is fixedly connected with between two pieces of confinement plates by reinforcing bar, and two pieces of confinement plates are vertically fastened between the pair of parallel cell wall of test flume; Described displacement accurate measurement device comprises wheel hub, the bracing wire be coiled in the rotating shaft of wheel hub, the precision rotation inductor be connected with wheel hub and the constant force spring acting on wheel hub rotating shaft, described displacement accurate measurement device is fixed on the upper end of one piece of confinement plate, and the free end of bracing wire is fixed on the upper end of another block confinement plate; Described data acquisition unit is electrically connected with precision rotation inductor.
Preferably, described displacement accurate measurement device also comprises housing, and described housing is bolted on one piece of confinement plate upper end.
Preferably, the free end of described bracing wire is provided with locating piece, and described locating piece is bolted on another block confinement plate upper end.
Preferably, described wheel hub is connected by internal and external threads with precision rotation inductor.
The beneficial effects of the utility model:
1) can accurately detect concrete distortion, avoid the artificial mobile error brought;
2) realize continuing automatically to detect the deformation performance of concrete from plastic stage to hardening phase;
3) simple, the convenient disassembly of the utility model apparatus structure, material requested and instrument few, and simple to operate, experimental phenomena is obvious, result is repeated and stability is high.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of concrete limited expansion rate proving installation of the present utility model.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the three-dimensional structure for amplifying schematic diagram of displacement accurate measurement device in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figures 1 to 3, concrete limited expansion rate proving installation comprise test flume 1, the longitudinal restraint device 2 be located in test flume 1, the data acquisition unit 4 that is arranged on the displacement accurate measurement device 3 on longitudinal restraint device 2 and is connected with displacement accurate measurement device 3.
Longitudinal restraint device 2 is comprised between two pieces of confinement plates be arranged in parallel, 2.1, two pieces of confinement plates 2.1 and being fixedly connected with by reinforcing bar 2.2, and two pieces of confinement plates 2.1 are vertically fastened between the pair of parallel cell wall of test flume 1.
Displacement accurate measurement device 3 comprises housing 3.6, wheel hub 3.1, be coiled in the bracing wire 3.2 in the rotating shaft of wheel hub 3.1, the precision rotation inductor 3.3 be connected with wheel hub 3.1 and act on the constant force spring 3.4 of wheel hub 3.1 rotating shaft, wheel hub 3.1 is connected by internal and external threads with precision rotation inductor 3.3.
Housing 3.6 is bolted on one piece of confinement plate 2.1 upper end, and the free end of bracing wire 3.2 is provided with locating piece 3.5, and locating piece 3.5 is bolted on another block confinement plate 2.1 upper end.
Data acquisition unit 4 is electrically connected with precision rotation inductor 3.3.
When using above-mentioned concrete limited expansion rate proving installation, first expanded by concrete test block, longitudinal limiter 2 is driven to produce distortion, two pieces of confinement plates 2.1 are strutted by both sides, bracing wire 3.2 is subject to tractive, and constant force spring 3.4 ensures that the rate of tension of bracing wire 3.2 is constant, and threaded wheel hub drives precision rotation inductor 3.3 to rotate, export an electric signal proportional with bracing wire 3.2 displacement, collect electric signal by data acquisition unit 4 and can draw the displacement of moving object, direction or speed.
Claims (4)
1. a concrete limited expansion rate proving installation, is characterized in that: comprise test flume (1), the longitudinal restraint device (2) be located in test flume (1), the data acquisition unit (4) that is arranged on the displacement accurate measurement device (3) on longitudinal restraint device (2) and is connected with displacement accurate measurement device (3);
Described longitudinal restraint device (2) comprises two pieces of confinement plates be arranged in parallel (2.1), be fixedly connected with by reinforcing bar (2.2) between two pieces of confinement plates (2.1), two pieces of confinement plates (2.1) are vertically fastened between the pair of parallel cell wall of test flume (1);
Described displacement accurate measurement device (3) comprises wheel hub (3.1), the bracing wire (3.2) be coiled in the rotating shaft of wheel hub (3.1), the precision rotation inductor (3.3) be connected with wheel hub (3.1) and the constant force spring (3.4) acting on wheel hub (3.1) rotating shaft, described displacement accurate measurement device (3) is fixed on the upper end of one piece of confinement plate (2.1), and the free end of bracing wire (3.2) is fixed on the upper end of another block confinement plate (2.1);
Described data acquisition unit (4) is electrically connected with precision rotation inductor (3.3).
2. concrete limited expansion rate proving installation according to claim 1, it is characterized in that: described displacement accurate measurement device (3) also comprises housing (3.6), described housing (3.6) is bolted on one piece of confinement plate (2.1) upper end.
3. concrete limited expansion rate proving installation according to claim 1 and 2, it is characterized in that: the free end of described bracing wire (3.2) is provided with locating piece (3.5), described locating piece (3.5) is bolted on another block confinement plate (2.1) upper end.
4. concrete limited expansion rate proving installation according to claim 1 and 2, is characterized in that: described wheel hub (3.1) is connected by internal and external threads with precision rotation inductor (3.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610034.8U CN204154717U (en) | 2014-10-21 | 2014-10-21 | Concrete limited expansion rate proving installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610034.8U CN204154717U (en) | 2014-10-21 | 2014-10-21 | Concrete limited expansion rate proving installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204154717U true CN204154717U (en) | 2015-02-11 |
Family
ID=52512821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420610034.8U Expired - Fee Related CN204154717U (en) | 2014-10-21 | 2014-10-21 | Concrete limited expansion rate proving installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204154717U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014346A (en) * | 2017-05-31 | 2017-08-04 | 济南大学 | The device tested suitable for the deformation after to theing cement solidifies |
-
2014
- 2014-10-21 CN CN201420610034.8U patent/CN204154717U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107014346A (en) * | 2017-05-31 | 2017-08-04 | 济南大学 | The device tested suitable for the deformation after to theing cement solidifies |
| CN107014346B (en) * | 2017-05-31 | 2023-02-21 | 济南大学 | Device suitable for deformation after cement solidifies is tested |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |