CN201867410U - Test device for measuring concrete shrinkage - Google Patents
Test device for measuring concrete shrinkage Download PDFInfo
- Publication number
- CN201867410U CN201867410U CN2010205955764U CN201020595576U CN201867410U CN 201867410 U CN201867410 U CN 201867410U CN 2010205955764 U CN2010205955764 U CN 2010205955764U CN 201020595576 U CN201020595576 U CN 201020595576U CN 201867410 U CN201867410 U CN 201867410U
- Authority
- CN
- China
- Prior art keywords
- micrometer
- concrete
- test
- chi frame
- head
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012237 artificial material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The utility model relates to a test device for measuring concrete shrinkage, which comprises a U-shaped scale holder. A spiral micrometer or a dial gauge is arranged at one end of the U-shaped scale holder; a micrometer head is arranged at the other end of the U-shaped scale holder; a tested concrete block is arranged between the spiral micrometer or the dial gauge and the micrometer head; probes are pre-embedded at two ends of the tested concrete block; the probes at two ends are propped against the micrometer head and the spiral micrometer respectively; and a support frame is arranged at the lower part of the U-shaped scale holder. The test device has the advantages of simple structure, high measurement accuracy and good test repeatability, and the concrete test block is accurately positioned.
Description
Technical field
The utility model relates to a kind of test unit that is used to measure concrete shrinkage.
Background technology
Cement concrete is the most widely used building materialss of modern times, also is the most large current artificial material, is the inherent characteristic of cement concrete but shrink, and concrete causes that because of contraction the phenomenon of cracking is of common occurrence.Concrete volume stability and cracking problem are the important indicators that concrete durability is estimated, it is the important parameter of xoncrete structure quality, therefore, volume stability of concrete furtherd investigate be of great immediate significance, the accuracy of concrete shrinkage test will directly influence the quality safety evaluation of construction work.
At present, mensuration concrete expansion commonly used is a SP540 type concrete shrinkage measuring instrument with shrinkage, and this contraction measuring instrument is made of base, support, three major parts of measurement bay, the instrument heaviness, complicated operation, poor repeatability, and dial gauge makes test accuracy lower.
Chinese patent (patent No.: ZL 200720032091.2) discloses a kind of concrete shrinkage measuring instrument with Chinese patent (patent No.: ZL 02226866.9), can once adjust the back Continuous Tracking and measure the contraction situation of this concrete test block, but because the concrete shrinkage test period is long, often above 3 months, even reach the several years, make the turnover of measuring instrument be affected, can't satisfy the requirement of carrying out a large amount of concrete shrinkage tests, in addition, the employing dial gauge is measured, can't measure the small cubic deformation of concrete, test accuracy is not high.
The utility model content
The purpose of this utility model is to address the above problem and provide a kind of simple in structure, to the concrete test block accurate positioning, and measuring accuracy height, the test unit that is used to measure concrete shrinkage of the good reproducibility of test.
The utility model solves the problems of the technologies described above the technical scheme that is adopted:
It comprises U type chi frame, U type chi frame one end is provided with micrometer caliper or clock gauge, the U type chi frame other end is provided with micrometer head, between micrometer caliper or clock gauge and micrometer head, be provided with the detected concrete piece, the pre-buried probe in detected concrete piece two ends, the probe at two ends withstands on respectively on micrometer head and the micrometer caliper, and U type chi frame bottom is provided with support.
Above-mentioned U type chi frame inboard vertically is provided with backstay, is used for the location of detected concrete piece.
Above-mentioned frame bottom is provided with roller.
The termination of exposing termination and backstay of above-mentioned probe is coniform or dome shape.
Compared with prior art, the utility model has been obtained following technique effect:
1, this utility model is simple in structure, to the accurate positioning of detected concrete piece, measuring accuracy height, the good reproducibility of test;
2, by being provided with roller in frame bottom, make things convenient for moving of device, can test many groups detected concrete piece simultaneously, conveniently carry out great deal of experimental;
3, all be made as coniform or dome shape by the termination of exposing termination and backstay that will pop one's head in, can further strengthen measuring accuracy;
4, can select clock gauge or micrometer caliper for use, to satisfy the requirement of test accuracy and range according to the test needs.
Description of drawings
Fig. 1 uses the front view of micrometer caliper for the utility model;
Fig. 2 uses the vertical view of micrometer caliper for the utility model;
Fig. 3 uses the front view of clock gauge for the utility model;
Fig. 4 uses the vertical view of clock gauge for the utility model.
Wherein: 1-U type chi frame, 2-micrometer caliper, 3-clock gauge, 4-micrometer head, 5-support, 6-detected concrete piece, 7-probe, 8-backstay, 9-roller.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
Referring to Fig. 1-4, a kind of test unit that is used to measure concrete shrinkage, it comprises U type chi frame 1, and U type chi frame one end is provided with micrometer caliper 2 or clock gauge 3, and it is fixed on the chi frame by fixed screw.The U type chi frame other end is provided with micrometer head 4, and the micrometering head is fixed by hold-down nut, and can regulate the length of micrometer head.Between micrometer caliper or clock gauge and micrometer head, be provided with detected concrete piece 6, the pre-buried probe 7 in detected concrete piece two ends, the probe at two ends withstands on micrometer head and the micrometer caliper respectively or clock gauge 3, probe can be in the process of detected concrete formation of lots, and is just pre-buried in the detected concrete piece.U type chi frame bottom is provided with support 5, and frame bottom is provided with roller 9, can freely roll.The inboard vertical detected concrete piece of U type chi frame be provided with two backstays 8, be used for the location of detected concrete piece.The termination of exposing termination and backstay of above-mentioned probe is coniform or dome shape, can put contact like this, and the some contact has better contact effect, strengthens balance and stability.
For using micrometer caliper to measure, use the utility model to generally comprise following use step:
1, the detected concrete piece is placed on the smooth testing table;
2, longitudinal sliding motion test unit, when detected concrete piece side was close in the termination of two backstays, slowly laterally sliding test device to micrometering head was close to probe;
3, main knob and the vernier adjustment knob on the adjustable screw mircrometer gauge makes micrometric screw be close to probe, takes reading to be L
x
The initial length of detected concrete piece is L
0The reading that records for the first time after the demoulding of detected concrete formation of lots is L
1After maintenance t days, the reading that records is L
t, then the shrinkage factor of this detected concrete piece is (L
1-L
t)/L
0
For using clock gauge to measure, use the utility model to generally comprise following steps:
1, the detected concrete piece is placed on the smooth small test platform;
2, pin the measuring head of clock gauge;
3, longitudinal sliding motion test unit, when detected concrete piece side was close in the termination of two backstays, slowly laterally sliding test device to micrometering head was close to probe;
4, unclamp the measuring head of clock gauge, make measuring head be close to probe, taking reading is L
x
The initial length of detected concrete piece is L
0The reading that records for the first time after the demoulding of detected concrete formation of lots is L
1After maintenance t days, the reading that records is L
t, then the shrinkage factor of this detected concrete piece is (L
1-L
t)/L
0
Protection domain of the present utility model is not limited to the above embodiments, and obviously, those skilled in the art can carry out various changes and distortion and not break away from scope and spirit of the present utility model the utility model.If these changes and distortion belong in the scope of the utility model claim and equivalent technologies thereof, intention then of the present utility model also comprises these changes and is out of shape interior.
Claims (4)
1. test unit that is used to measure concrete shrinkage, it is characterized in that: it comprises U type chi frame (1), U type chi frame one end is provided with micrometer caliper (2) or clock gauge (3), the U type chi frame other end is provided with micrometer head (4), between micrometer caliper and micrometer head, be provided with detected concrete piece (6), the pre-buried probes in detected concrete piece two ends (7), the probe at two ends withstand on respectively on micrometer head and the micrometer caliper, and U type chi frame bottom is provided with support (5).
2. the test unit that is used to measure concrete shrinkage according to claim 1 is characterized in that: U type chi frame inboard vertically is provided with backstay (8), is used for the location of detected concrete piece.
3. the test unit that is used to measure concrete shrinkage according to claim 1 and 2 is characterized in that: described frame bottom is provided with roller (9).
4. the test unit that is used to measure concrete shrinkage according to claim 1 and 2 is characterized in that: the termination of exposing termination and backstay of described probe is coniform or dome shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205955764U CN201867410U (en) | 2010-11-08 | 2010-11-08 | Test device for measuring concrete shrinkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205955764U CN201867410U (en) | 2010-11-08 | 2010-11-08 | Test device for measuring concrete shrinkage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201867410U true CN201867410U (en) | 2011-06-15 |
Family
ID=44138562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205955764U Expired - Fee Related CN201867410U (en) | 2010-11-08 | 2010-11-08 | Test device for measuring concrete shrinkage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201867410U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
| CZ304898B6 (en) * | 2013-12-04 | 2015-01-07 | Vysoké Učení Technické V Brně | Continuous measurement method of cement composite weight losses in early phase of setting and hardening, and apparatus for making the same |
-
2010
- 2010-11-08 CN CN2010205955764U patent/CN201867410U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ304898B6 (en) * | 2013-12-04 | 2015-01-07 | Vysoké Učení Technické V Brně | Continuous measurement method of cement composite weight losses in early phase of setting and hardening, and apparatus for making the same |
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201688812U (en) | Tooling for measuring depth of groove in hole | |
| CN201417271Y (en) | Concrete expansion and contraction measuring device | |
| CN203785611U (en) | Measuring tool for steel member surface flatness | |
| CN201527425U (en) | Test device for measuring shrinkage of concrete | |
| CN202133349U (en) | Calibrating device for non-contact displacement sensor | |
| CN201828221U (en) | Cylinder jacket length and spigot height checking fixture | |
| CN209147885U (en) | Height measurement device in a kind of container | |
| CN201867410U (en) | Test device for measuring concrete shrinkage | |
| CN203011799U (en) | Mortar consistency determination device | |
| CN207976083U (en) | A kind of auto parts and components measuring device | |
| CN214895296U (en) | A slump meter for highway concrete testing | |
| CN206740037U (en) | A kind of concrete shrinkage dilatometer | |
| CN2685818Y (en) | Shell member centre hole depth measuring instrument | |
| CN105044313A (en) | Concrete alkali activity measuring device and method | |
| CN211783170U (en) | A device for measuring the size of concrete compressive specimens | |
| CN210981105U (en) | Rock sample basic parameter measuring device | |
| CN208269777U (en) | Thinning measuring table and system thereof | |
| CN202126256U (en) | Contactless displacement measurement device | |
| CN205607357U (en) | Wall thickness detector | |
| CN206772311U (en) | A kind of vertical member quality detection device | |
| CN202709959U (en) | Bottom thickness measurement device for workpiece | |
| CN214010202U (en) | Flatness detection device for desktop production | |
| CN201314818Y (en) | Bending measuring apparatus | |
| CN202432979U (en) | Surface defect concave-convex quantity measuring system for hot rolled steel plate and coil | |
| CN211576069U (en) | An Improved Contact Concrete Expansion and Shrinkage Tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110615 Termination date: 20111108 |