CN210198307U - Cement-based material corrugated pipe volume deformation tester - Google Patents
Cement-based material corrugated pipe volume deformation tester Download PDFInfo
- Publication number
- CN210198307U CN210198307U CN201920535728.2U CN201920535728U CN210198307U CN 210198307 U CN210198307 U CN 210198307U CN 201920535728 U CN201920535728 U CN 201920535728U CN 210198307 U CN210198307 U CN 210198307U
- Authority
- CN
- China
- Prior art keywords
- cement
- corrugated pipe
- bellows
- based material
- eddy current
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a cement-based material bellows volume deformation apparatus, including host computer, electric eddy current displacement sensor, temperature and humidity sensor, bellows, vertical restraint section of thick bamboo, go up the stopper, lower stopper, reflection target and sample platform. One end of the eddy current displacement sensor is connected with the host computer, and the other end of the eddy current displacement sensor is fixed on the sample table. The temperature and humidity sensor is connected with the host. The reflecting target is horizontally placed on the upper plug and is positioned right below the testing end of the eddy current displacement sensor. The device is characterized in that the vertical restraint cylinder is fixed on a sample table; the inner diameter of the vertical restraining cylinder is slightly larger than the outer diameter of the corrugated pipe; the corrugated pipe is made of a low-density polyethylene material; during testing, cement-based materials are poured into the corrugated pipe, the two ends of the corrugated pipe are sealed by the lower plug and the upper plug, and then the corrugated pipe is inserted into the vertical restraining barrel; the diameter of the upper plug is slightly smaller than the inner diameter of the end head of the corrugated pipe. The utility model discloses can measure the deformation of the whole process of cement-based material setting and hardening.
Description
Technical Field
The utility model relates to a determinator for detecting cement-based material volume deformation.
Background
The volume deformation of the cement-based material is a very concerned index for building material researchers, and particularly the volume deformation of the early-age cement-based material has a very close relationship with the durability of concrete. At present, no intuitive instrument is provided for domestic detection of volume deformation of cement-based materials, and one-dimensional shrinkage or expansion is used as an evaluation index, such as a contact method and a non-contact method in the standard GB/T50082-2009 test method for long-term performance and durability of common concrete. The German Schleibinge company provides a shrinkage bucket measuring instrument which comprises a conical shrinkage measuring pool, a laser detector and a reflector, wherein a sample to be measured of a cement-based material is poured into the conical shrinkage measuring pool in the using process, the reflector is arranged at the center of the surface of the sample, the laser detector is fixed right above the reflector, and the shrinkage or expansion condition of the sample to be measured can be recorded very accurately under the unconstrained condition because no mechanical connection exists between the sample to be measured and the detector. And the structure of the conical pool can ensure that the height of the material is always related to the volume of the material, so that the volume deformation of the cement-based material is measured. ZL201620484587.2 "a novel multichannel cement-based material early age volume deformation apparatus" proposes to adopt the electric eddy current displacement sensor to replace laser detector, has solved the high problem of equipment cost, but two kinds of equipment all have a common problem: the volume change of the cement-based material before setting can be only reflected, once the material is initially and finally set, the conical shrinkage measuring pool can generate a constraint effect on the cement-based material, and the plastic shrinkage and the autogenous shrinkage of the cement-based material cannot be observed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve exist among the prior art not enough, provide a novel cement-based material bellows volume deformation apparatus.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a cement-based material bellows volume deformation apparatus, includes host computer, electric eddy current displacement sensor, temperature and humidity sensor, bellows, vertical restraint section of thick bamboo, goes up stopper, lower stopper, reflection target and sample platform. One end of the eddy current displacement sensor is connected with the host computer, and the other end of the eddy current displacement sensor is fixed on the sample table. The temperature and humidity sensor is connected with the host. The reflecting target is horizontally placed on the upper plug and is positioned right below the testing end of the eddy current displacement sensor. The device is characterized in that the vertical restraint cylinder is fixed on the sample table; the inner diameter of the vertical restraining cylinder is slightly larger than the outer diameter of the corrugated pipe; the corrugated pipe is made of low-density polyethylene thin-wall materials, and the wall thickness of the corrugated pipe is 0.5mm +/-0.2 mm. During testing, cement-based materials are poured into the corrugated pipe, the two ends of the corrugated pipe are sealed by the lower plug and the upper plug, and then the corrugated pipe is inserted into the vertical restraining barrel; the diameter of the upper plug is slightly smaller than the inner diameter of the end head of the corrugated pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
the method can be used for measuring the deformation of the cement-based material before setting and hardening, and can also be used for measuring the plastic deformation and the self-contraction deformation after setting and hardening.
Drawings
FIG. 1 is a test chart of the volume deformation tester for the cement-based material corrugated pipe of the present invention;
FIG. 2 is a structural view of the vertical restraining cylinder of the present invention;
in the figure: the method comprises the following steps of 1-a host computer, 2-an eddy current displacement sensor, 3-a temperature and humidity sensor, 4-a corrugated pipe, 5-a vertical restraint cylinder, 6-a lower plug, 7-a reflection target, 8-a sample table, 9-a cement-based material and 10-an upper plug.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a cement-based material corrugated pipe volume deformation tester comprises a host 1, an eddy current displacement sensor 2, a temperature and humidity sensor 3, a corrugated pipe 4, a vertical restraining barrel 5, a plug 6, a reflecting target 7 and a sample table 8. One end of the eddy current displacement sensor 2 is connected with the host machine 1, and the other end is vertically fixed on the sample table 8. And the temperature and humidity sensor 3 is connected with the host 1. The vertical restraint cylinder 5 is fixed on the specimen table 8. The inner diameter of the vertical restraining cylinder 5 is slightly larger than the outer diameter of the corrugated pipe 4; the bellows 4 may be sealed at both ends with a lower plug 6 and an upper plug 10 and inserted into the vertical containment tube 5. The diameter of the upper plug 10 is slightly smaller than the inner diameter of the end of the bellows 4. The reflective target 7 is placed on the upper plug 10 and is located directly below the eddy current displacement sensor 2.
The following describes the method of use of the present invention.
Firstly, one end of the eddy current displacement sensor 2 is connected to the host machine 1, and the other end is fixed on the sample table 8. The temperature and humidity sensor 3 is connected to the host 1. Power is supplied to the host 1.
The vertical restraint cylinder 5 is fixed on the specimen table 8. One end of the corrugated pipe 4 is sealed by adopting a lower plug 6, then a newly mixed cement-based material 9 is poured, and when slurry is poured to a flat opening at the upper end of the corrugated pipe 4, a plug 10 is installed. Then the corrugated pipe 4 filled with the cement-based material 9, the lower plug 6 and the upper plug 10 is inserted into the vertical restraining barrel 5, the gap between the upper plug 10 and the corrugated pipe 4 is sealed by Vaseline, the reflecting target 7 is arranged on the upper plug 10, the testing end of the eddy current displacement sensor 2 is aligned to the reflecting target 7, and the measuring range is adjusted. The host 1 is started and the measurement is started. And the temperature and humidity sensor displays the change condition of the environmental temperature and humidity in the test process.
Claims (5)
1. A cement-based material corrugated pipe volume deformation tester comprises a host, an eddy current displacement sensor, a temperature and humidity sensor, a corrugated pipe, a vertical restraint cylinder, an upper plug, a lower plug, a reflection target and a sample table; one end of the eddy current displacement sensor is connected with the host computer, and the other end of the eddy current displacement sensor is fixed on the sample table; the temperature and humidity sensor is connected with the host; the reflecting target is horizontally placed on the upper plug and is positioned right below the testing end of the eddy current displacement sensor; the device is characterized in that the vertical restraining cylinder is fixed on the sample table.
2. The apparatus of claim 1, wherein the vertical constraining cylinder inner diameter is slightly larger than the bellows outer diameter.
3. A cement-based material bellows volumetric deformation meter according to claim 1, wherein the bellows is made of a thin walled material of low density polyethylene.
4. A cement-based material bellows volumetric deformation apparatus as defined in claim 3 wherein during testing the interior of the bellows is filled with cement-based material, both ends of the bellows are sealed with a lower plug and an upper plug, and the bellows is inserted into the vertical restraint cylinder.
5. A cement-based material bellows volumetric deformation apparatus as defined in claim 1, wherein the upper plug diameter is slightly less than the bellows tip inner diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535728.2U CN210198307U (en) | 2019-04-19 | 2019-04-19 | Cement-based material corrugated pipe volume deformation tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920535728.2U CN210198307U (en) | 2019-04-19 | 2019-04-19 | Cement-based material corrugated pipe volume deformation tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210198307U true CN210198307U (en) | 2020-03-27 |
Family
ID=69876920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920535728.2U Active CN210198307U (en) | 2019-04-19 | 2019-04-19 | Cement-based material corrugated pipe volume deformation tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210198307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155585A (en) * | 2021-04-06 | 2021-07-23 | 浙江省交通运输科学研究院 | Method for testing self-shrinkage performance of cement-based material |
-
2019
- 2019-04-19 CN CN201920535728.2U patent/CN210198307U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155585A (en) * | 2021-04-06 | 2021-07-23 | 浙江省交通运输科学研究院 | Method for testing self-shrinkage performance of cement-based material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100575953C (en) | Measuring apparatus for rate of self-contraction of cement concrete | |
| CN210198307U (en) | Cement-based material corrugated pipe volume deformation tester | |
| CN205991775U (en) | A kind of novel multi-channel cement-based material morning age cubic deformation analyzer | |
| CN207198157U (en) | A kind of device for measuring cement-based material self-constriction | |
| CN205581106U (en) | A device for testing self -compaction microdilatancy steel pipe concrete expansion rate | |
| CN103344485B (en) | Axial loading system and loading method | |
| CN202433369U (en) | Testing device used for detecting slump and expansion degree of concrete | |
| CN107807048B (en) | A kind of experimental rig and method of radial pressure measurement asphalt tensile strength | |
| CN209512762U (en) | A kind of concrete rough surface instruments of inspection | |
| CN107843206A (en) | A kind of bridge pier curvature displacement test device and method of testing | |
| CN200979544Y (en) | A cement concrete autogenous-shrinkage ratio detector | |
| CN111912867B (en) | Grouting metal sleeve compactness detection device and method based on electromagnetic wave time domain reflection | |
| CN201600120U (en) | Soil interior sedimentation measuring device | |
| CN206618756U (en) | Test the easy device that cement paste shrinks overall process | |
| CN206891901U (en) | Concrete slump test instrument | |
| Read et al. | Time-dependent deformation and craze initiation in PMMA: volume effects | |
| CN104374897A (en) | Method for determining early-stage concrete crack resistance by adopting elliptical ring test specimen | |
| CN109856376B (en) | Device for testing shrinkage performance of cement-based material | |
| CN110487349B (en) | Method for detecting height of inner slurry surface of grouting sleeve by applying standard thickness weight | |
| CN108956963B (en) | Slump test equipment for building concrete | |
| CN206378429U (en) | A kind of device for testing cement paste or Mortar shrinkage | |
| CN110243268A (en) | Volume of concrete linear deformation tester and test method | |
| Upreti et al. | Measurement of soil shrinkage curve using photogrammetry | |
| CN213210162U (en) | Quick detection device of concrete expansion rate | |
| CN213423094U (en) | Detection apparatus for directly perceivedly characterize expansion agent expansibility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |