CN205229157U - Flat horizontal cement concrete air shrinkage test device - Google Patents
Flat horizontal cement concrete air shrinkage test device Download PDFInfo
- Publication number
- CN205229157U CN205229157U CN201521080819.XU CN201521080819U CN205229157U CN 205229157 U CN205229157 U CN 205229157U CN 201521080819 U CN201521080819 U CN 201521080819U CN 205229157 U CN205229157 U CN 205229157U
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- end plate
- side direction
- direction end
- hole
- test
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Abstract
The utility model discloses a flat horizontal cement concrete air shrinkage test device, including the metal test mould, the metal test mould both ends are equipped with first side direction end plate and second side direction end plate respectively, the bottom is equipped with the semi -cylindrical recess in the metal test mould, the glass stick has been placed in the semi -cylindrical recess, be equipped with the screw thread through -hole on the first side direction end plate, install fixing rivet in the screw thread through -hole, be equipped with the through -hole on the second side direction end plate, place by the amesdial in the through -hole, the amesdial passes through the fix with screw on second side direction end plate, place in the metal test mould and remain to be tested the piece, it all is equipped with the glass piece to await measuring the test piece both ends, await measuring the test piece both ends the glass piece respectively with the contact of fixing rivet and amesdial. The utility model discloses a replacing traditional micrometer to measure test piece length with the amesdial reading, and need not carrying the test piece, avoided in the past among the test piece handling axle center to survey the correction of dropping of nail and micrometer, measurement process to the influence of test result, labour saving and time saving, measurement accuracy are high.
Description
Technical field
The utility model relates to the technical field of hardened cement concrete performance test, is specifically related to a kind of horizontal cement concrete dry shrinkage testing device.
Background technology
Cement concrete, with its excellent performance, is widely used in road engineering.But, for the mensuration of the cement concrete contract with dry rate in a certain length of time, " highway engineering cement and cement concrete testing regulations " (JTGE30-2005) specifies in test piece maintenance process, measure by micrometer the change that axle center, the test specimen two ends length surveyed between nail determines test specimen axial length in regulation curing age, and then calculate contract with dry rate.Survey the embedding method of nail in test specimen and have two kinds: built-in type and rear buried.(1) if adopt pre-buried survey to follow closely, need clean survey nail be placed in the center pit of die trial two end plate, after specimen molding, directly deliver to maintenance in curing box or fog room; (2) survey nail if buried after adopting, need first by specimen molding, then after test piece maintenance 1d-2d form removal, reinforce axle center with epoxy resin or other Chemical Felter immediately and survey nail.But surveying all can appear in the embedding survey nail of said method follows closely the phenomenon that comes off, affect the accuracy of measurement result on the one hand, again settle survey nail to need spended time and energy on the other hand and can not with origin-location inregister.In addition, all need the zero point rectified an instrument with par before each measurement, and at least check 1-2 time in the measuring process of half a day.Therefore, the dry shrinkage testing process specified in current specification is loaded down with trivial details and can not ensure degree of accuracy.
Utility model content
The purpose of this utility model is to provide a kind of horizontal cement concrete dry shrinkage testing device, to overcome the deficiencies in the prior art.
For achieving the above object, the utility model adopts following technical scheme:
A kind of horizontal cement concrete dry shrinkage testing device, comprise metal test mould, metal test mould two ends are respectively equipped with the first side direction end plate and the second side direction end plate, metal test mould inner bottom part is provided with semi-cylindrical recesses, glass bar is placed with in semi-cylindrical recesses, first side direction end plate is provided with tapped through hole, in tapped through hole, fixing rivet is installed, second side direction end plate is provided with through hole, place by clock gauge in through hole, clock gauge is fixed by screws on the second side direction end plate, test specimen to be measured is placed with in metal test mould, test specimen two ends to be measured are equipped with glass sheet, the glass sheet at test specimen two ends to be measured contacts with clock gauge with fixing rivet respectively.
Further, metal test mould is spill.
Further, semi-cylindrical recesses is three and is distributed in metal test mould inner bottom part.
Further, the diameter of glass bar is greater than the diameter of semi-cylindrical recesses.
Further, fixing rivet one end is round section, and the other end is provided with the threaded post for being fixed in tapped through hole.
Further, the second side direction end plate is provided with two for placing the through hole of clock gauge.
Further, contact with glass bar bottom test specimen to be measured.
Compared with prior art, the utility model has following useful technique effect:
A kind of horizontal cement concrete of the utility model dry shrinkage testing device, comprise metal test mould, metal test mould two ends are respectively equipped with the first side direction end plate and the second side direction end plate, metal test mould inner bottom part is provided with semi-cylindrical recesses, glass bar is placed with in semi-cylindrical recesses, first side direction end plate is provided with tapped through hole, in tapped through hole, fixing rivet is installed, second side direction end plate is provided with through hole, place by clock gauge in through hole, clock gauge is fixed by screws on the second side direction end plate, test specimen to be measured is placed with in metal test mould, test specimen two ends to be measured are equipped with glass sheet, the glass sheet at test specimen two ends to be measured contacts with clock gauge with fixing rivet respectively, piece lengths is measured by replacing traditional micrometer with clock gauge reading, and do not need to carry test specimen, avoid test specimen handling process axis in the past and survey the correction of dropping of nail and micrometer, measuring process is on the impact of test findings, time saving and energy saving, measuring accuracy is high, the utility model is by arranging glass bar at die trial base plate, the friction in process of the test between test specimen and metal test mould base plate can be avoided the impact of test findings.Meanwhile, finely tune by glass bar to make clock gauge pointer mediate.
Further, the utility model is averaged by arranging two clock gauges on the end plate of side, replaces a traditional axle center to survey nail, to make measurement result more accurate.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Wherein, 1, metal test mould; 3, the first side direction end plate; 4, the second side direction end plate; 5, fixing rivet; 6, clock gauge; 7, glass bar; 8, glass sheet; 9, semi-cylindrical recesses; 10, screw; 11, tapped through hole; 12, test specimen to be measured.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, a kind of horizontal cement concrete dry shrinkage testing device, comprise the metal test mould 1 of spill, metal test mould 1 two ends are respectively equipped with the first side direction end plate 3 and the second side direction end plate 4, metal test mould 1 inner bottom part is provided with semi-cylindrical recesses 9, semi-cylindrical recesses 9 is three and is distributed in metal test mould 1 inner bottom part, glass bar 7 is placed with in semi-cylindrical recesses 9, first side direction end plate 3 is provided with tapped through hole 11, fixing rivet 5 is installed in tapped through hole 11, fixing rivet 5 one end is round section, the other end is provided with the threaded post for being fixed in tapped through hole 11, second side direction end plate 4 is provided with two through holes, all place in two through holes by clock gauge 6, clock gauge 6 is fixed on the second side direction end plate 4 by screw 10, test specimen 12 to be measured is placed in metal test mould 1, test specimen 12 two ends to be measured are respectively equipped with glass sheet 8, the glass sheet 8 at two ends contacts with clock gauge 6 with fixing rivet 5 respectively, contact with glass bar 7 bottom test specimen 12 to be measured, avoid test specimen 12 to be measured and the frictional influence test findings of metal test mould base plate 2, calculated the amount of contraction in a certain length of time by the reading of clock gauge.
Below in conjunction with accompanying drawing, structural principle of the present utility model and use step are described further:
One block of glass sheet 8 is pasted respectively at test specimen 12 two ends to be measured, three glass bars 7 are positioned over three semi-cylindrical recesses 9 places in metal test mould 1, then will be positioned in metal test mould 1 with to be tested of glass plate 8, be that the tapped through hole 11 of the fixing rivet 5 first side direction end plate 3 of round section is fixed on side direction end plate 3 by top, glass sheet 8 and fixing rivet 5 close contact completely of test specimen 12 one end to be measured, the quarter correcting clock gauge 6 coils reading, to be corrected complete after two clock gauges 6 are arranged on the second side direction end plate 4, and fix clock gauge 6 from top to down with screw 10, in installation process, the reading of clock gauge 6 pointer is in the centre of meter full scale, so that test specimen is finely tuned after entering curing box, then metal test mould 1 level be equipped with to be tested 12 is put into curing box, clock gauge 6 pointer is made to mediate the micro-displacement eliminated in handling process by touching glass bar 7.Start test after fine setting terminates, only need read the reading Lt of clock gauge, then according to the contract with dry rate of a certain age concrete of formulae discovery in the stipulated time:
In formula: S
t---the concrete dry shrinkage (%) in the t days length of time;
L
0---the original length of concrete sample during on-test;
L
t---the length of time t days concrete samples length.
Claims (7)
1. a horizontal cement concrete dry shrinkage testing device, it is characterized in that, comprise metal test mould (1), metal test mould (1) two ends are respectively equipped with the first side direction end plate (3) and the second side direction end plate (4), metal test mould (1) inner bottom part is provided with semi-cylindrical recesses (9), glass bar (7) is placed with in semi-cylindrical recesses (9), first side direction end plate (3) is provided with tapped through hole (11), fixing rivet (5) is installed in tapped through hole (11), second side direction end plate (4) is provided with through hole, place by clock gauge (6) in through hole, clock gauge (6) is fixed on the second side direction end plate (4) by screw (10), test specimen to be measured (12) is placed with in metal test mould (1), test specimen to be measured (12) two ends are equipped with glass sheet (8), the glass sheet (8) at test specimen to be measured (12) two ends contacts with clock gauge (6) with fixing rivet (5) respectively.
2. a kind of horizontal cement concrete dry shrinkage testing device according to claim 1, it is characterized in that, metal test mould (1) is spill.
3. a kind of horizontal cement concrete dry shrinkage testing device according to claim 1, is characterized in that, semi-cylindrical recesses (9) is three and is distributed in metal test mould (1) inner bottom part.
4. a kind of horizontal cement concrete dry shrinkage testing device according to claim 3, it is characterized in that, the diameter of glass bar (7) is greater than the diameter of semi-cylindrical recesses (9).
5. a kind of horizontal cement concrete dry shrinkage testing device according to claim 1, it is characterized in that, fixing rivet (5) one end is round section, and the other end is provided with the threaded post for being fixed in tapped through hole (11).
6. a kind of horizontal cement concrete dry shrinkage testing device according to claim 1, it is characterized in that, the second side direction end plate (4) is provided with two for placing the through hole of clock gauge (6).
7. a kind of horizontal cement concrete dry shrinkage testing device according to claim 1, is characterized in that, test specimen to be measured (12) bottom contacts with glass bar (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521080819.XU CN205229157U (en) | 2015-12-22 | 2015-12-22 | Flat horizontal cement concrete air shrinkage test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521080819.XU CN205229157U (en) | 2015-12-22 | 2015-12-22 | Flat horizontal cement concrete air shrinkage test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205229157U true CN205229157U (en) | 2016-05-11 |
Family
ID=55904214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521080819.XU Expired - Fee Related CN205229157U (en) | 2015-12-22 | 2015-12-22 | Flat horizontal cement concrete air shrinkage test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205229157U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107322763A (en) * | 2017-08-25 | 2017-11-07 | 济南四建（集团）有限责任公司 | A kind of pervious concrete compression strength test shaped device and forming method |
| CN109100497A (en) * | 2018-07-30 | 2018-12-28 | 广东浪淘砂新型材料有限公司 | A kind of test method of Dry Shrinkage of Cement Mortar |
| CN109406293A (en) * | 2018-12-10 | 2019-03-01 | 镇江市高等专科学校 | A kind of observable type concrete test device |
| CN113917122A (en) * | 2020-07-07 | 2022-01-11 | 长沙理工大学 | Device and method for testing shrinkage performance of cement stabilized macadam mixture in full age |
-
2015
- 2015-12-22 CN CN201521080819.XU patent/CN205229157U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107322763A (en) * | 2017-08-25 | 2017-11-07 | 济南四建（集团）有限责任公司 | A kind of pervious concrete compression strength test shaped device and forming method |
| CN107322763B (en) * | 2017-08-25 | 2023-06-20 | 济南四建（集团）有限责任公司 | Permeable concrete compressive strength test piece forming device and forming method |
| CN109100497A (en) * | 2018-07-30 | 2018-12-28 | 广东浪淘砂新型材料有限公司 | A kind of test method of Dry Shrinkage of Cement Mortar |
| CN109100497B (en) * | 2018-07-30 | 2020-12-01 | 广东浪淘砂新型材料有限公司 | Method for testing drying shrinkage performance of cement mortar |
| CN109406293A (en) * | 2018-12-10 | 2019-03-01 | 镇江市高等专科学校 | A kind of observable type concrete test device |
| CN113917122A (en) * | 2020-07-07 | 2022-01-11 | 长沙理工大学 | Device and method for testing shrinkage performance of cement stabilized macadam mixture in full age |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20161222 |