CN202583183U - Concrete contractometer - Google Patents
Concrete contractometer Download PDFInfo
- Publication number
- CN202583183U CN202583183U CN 201220219568 CN201220219568U CN202583183U CN 202583183 U CN202583183 U CN 202583183U CN 201220219568 CN201220219568 CN 201220219568 CN 201220219568 U CN201220219568 U CN 201220219568U CN 202583183 U CN202583183 U CN 202583183U
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- concrete
- pad
- mounting groove
- concrete shrinkage
- handle
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Abstract
The utility model provides a concrete contractometer, and belongs to the field of a measuring device. The concrete contractometer solves the problem that the concrete sample is not positioned precisely and placed stably because positioning columns are arranged at both ends of current concrete shrinkage measuring instruments. The concrete contractometer comprises a body which is provided with an installation groove for accommodating the concrete sample. A dial indicator is fixedly arranged on the inner wall of one end of the installation groove. The contracting head of the dial indicator faces the other end of the installation groove. A supporting plate is fixedly arranged on the inner wall of the other end of the installation groove. According to the concrete contractometer provided by the utility model, the concrete sample is positioned precisely and placed stably on the contractometer through the supporting plate.
Description
Technical field
The utility model belongs to the measurement mechanism field, relates to a kind of concrete shrinkage appearance.
Background technology
Concrete is present very important civil engineering material, it by Binder Materials, graininess gather materials, water, and the additive and the admixture that add in case of necessity prepare by a certain percentage, through evenly stirring, becomes a kind of artificial stone material after the sclerosis.Because concrete has characteristics such as compressive strength height, good endurance, strength grade wide ranges, so extensively apply in the civil engineering work.
Yet concrete also has the shortcoming of himself, the volume-diminished phenomenon that in concrete coagulation initial stage or hardening process, can occur, i.e. concrete shrinkage.Concrete shrinkage can cause harm such as member cracking, pretightning force loss, therefore, in the concrete development process, need go to measure the concrete shrinkage factor of this kind, with the harm that prevents concrete shrinkage to bring ahead of time.The concrete shrinkage rate is measured by a kind of special instrument, is the concrete shrinkage appearance, through the concrete shrinkage appearance concrete sample is repeatedly measured shrinkage factor.General concrete shrinkage appearance has a rectangular channel of placing concrete sample; Rectangular channel one end has a clock gauge; The other end has a location bolt, and the test specimen both ends have feeder head, concrete sample is located against coming with clock gauge feeder head and bolt respectively through feeder head.Yet this kind concrete shrinkage appearance is because bolt is adjustable, and concrete sample is heavier, so it is loosening bolt often to occur, needs repeatedly calibration.
China's utility application (200720032091.2) discloses a kind of concrete shrinkage measuring instrument; Comprise base, two blocks of location side plates, two vertical each other location casings that form of locating end plate; Dial gauge is contained on the locating end plate and holds out against with jackscrew, uses nut lock again; Be provided with one at the middle part of jackscrew nut and set nut and protect the table baffle plate, on corresponding another end plate of two locating end plates and dial gauge a reference column is set respectively, and with the set nut locking, base plate is provided with rolling steel ball.The characteristics of this utility model are that the instrument loose mail is few, and mechanism is compact, and is easy to operate, durable practicality, and systematic error is little.Yet the two ends of this concrete shrinkage measuring instrument all are to use reference column, because concrete sample weight is bigger, after placing test specimen on the instrument, the contact area of reference column and test specimen end face is less, and the location is accurate inadequately, placement is stable inadequately.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind of concrete shrinkage appearance, and this concrete shrinkage appearance is located on retractometer accurately by concrete sample and placement is stablized.
The purpose of the utility model can realize through following technical proposal: a kind of concrete shrinkage appearance; Comprise body; Described body has the mounting groove that is used to hold concrete sample, it is characterized in that, is fixed with clock gauge on the inwall of said mounting groove one end; The feeder head of said clock gauge is fixed with back up pad towards the mounting groove other end on the inwall of the said mounting groove other end.
During measurement concrete sample is placed in the mounting groove, the cell wall of mounting groove and test specimen side against, an end of test specimen is resisted against on the back up pad; The feeder head of the other end and clock gauge against because the size dimension of back up pad and the size of concrete sample adapt, and be to be fixed on the mounting groove end wall; Therefore test specimen is placed the back Stability Analysis of Structures; And because the stationkeeping of back up pad is constant, therefore and the distance between the clock gauge feeder head can not change because of long-term the use, measure accurately.
In above-mentioned concrete shrinkage appearance, the thickness of said back up pad is 2cm～5cm.Because the weight of concrete sample is bigger, the certain thickness of assurance back up pad can avoid back up pad to deform because of long-term the use.
In above-mentioned concrete shrinkage appearance, described body and back up pad all adopt steel material to process.The steel physical strength is high, can avoid distortion.
In above-mentioned concrete shrinkage appearance, described back up pad is fixed on the inwall of mounting groove through the mode of welding.Directly with back up pad weldering extremely on mounting groove, avoid long-term and use the back between the two because loosening and distance is between the two changed, influence measuring accuracy.
As other a kind of situation, in above-mentioned concrete shrinkage appearance, described back up pad is through on some inwalls that are bolted to mounting groove.Through bolt, need calibration accuracy after long-term the use, but this design can be changed after the wearing and tearing long-term use of back up pad.
In above-mentioned concrete shrinkage appearance, also be hinged with handle on the described body.Because retractometer is a steel, weight is bigger, installs handle and is convenient for carrying.
In above-mentioned concrete shrinkage appearance, described handle is the U type, and above-mentioned body is in the opening of handle, and the openend of said handle is hinged on the both sides of body through jointed shaft.Handle can rotate relative to body, the position of the relative body of adjustment handle.
In above-mentioned concrete shrinkage appearance, the sealed end of described handle and the distance between the jointed shaft are greater than the distance between the outer end of jointed shaft and clock gauge.Make handle can turn to the below of body from the top of body; Thereby can be when retractometer uses; An end that body is equipped with clock gauge is supported to certain height, and an end of body-fixed back up pad is against ground, and this design fully is resisted against on the back up pad test specimen.
In above-mentioned concrete shrinkage appearance, the distance between the feeder head of described jointed shaft and clock gauge is less than the distance between described jointed shaft and the back up pad.After body one end is supported to certain altitude, this design can prevent the body-fixed back up pad an end because weight inadequately by perk.
In above-mentioned concrete shrinkage appearance, described mounting groove assumes diamond in shape.Mounting groove has two angled side walls, after placing test specimen, the mounting groove two side can with the test specimen sidewall fully against.
Compared with prior art, this concrete shrinkage appearance has the following advantages:
1, because test specimen is to be resisted against on the back up pad, so the test specimen placement is more stable, measuring accuracy is higher.
2, because the concrete shrinkage appearance is installed an end perk of clock gauge, the other end and ground against, so under the weight of test specimen self, test piece end and back up pad against more abundant.
3, owing to back up pad is fixed in the mounting groove, therefore do not need to carry out the precision calibration because of long-term use.
Description of drawings
Fig. 1 is the perspective view of this concrete shrinkage appearance.
Fig. 2 is the perspective view of concrete sample.
Fig. 3 is the perspective view of the concrete shrinkage appearance among the embodiment two.
Among the figure, 1, body; 11, mounting groove; 2, clock gauge; 21, feeder head; 3, back up pad; 31, bolt; 4, handle; 41, jointed shaft; 5, concrete sample; 51, test specimen feeder head.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technical scheme of the utility model is done further to describe, but the utility model is not limited to these embodiment.
As shown in Figure 1, a kind of concrete shrinkage appearance comprises body 1; Body 1 is rectangular-shaped, offers mounting groove 11 along body 1 length direction on the body 1, and this mounting groove 11 is used to hold concrete sample 5; Mounting groove 11 assumes diamond in shape; Have two angled side walls, after placing concrete sample 5, mounting groove 11 two sides can with concrete sample 5 sidewalls fully against.Mounting groove 11 1 ends are fixed with clock gauge 2, and clock gauge 2 is fixed on the outside of mounting groove 11, and its feeder head 21 passes mounting groove 11 cell walls, towards mounting groove 11 other ends.Be fixed with back up pad 3 on the inwall of mounting groove 11 other ends, position and fixing Stability Analysis of Structures through 3 pairs of concrete samples 5 of back up pad.
Specifically, in conjunction with shown in Figure 2, concrete sample 5 is a Rectangular Concrete piece, and its both ends all have test specimen feeder head 51.Because the weight of concrete sample 5 is bigger, deform because of long-term the use in order to prevent back up pad 3, the thickness of back up pad 3 is 2cm～5cm, the preferred 4cm of present embodiment, and body 1 all adopts the higher steel material of physical strength to process with back up pad 3.Back up pad 3 is fixed on the inwall of mounting groove 11 through the mode of welding, and avoids the long-term back of using because of becoming flexible distance between the two to be changed between the two, influences measuring accuracy.
On body 1, also be hinged with the handle 4 that is the U type, carry to make things convenient for it.Body 1 is in the opening of handle 4, and the openend of handle 4 is hinged on through jointed shaft 41 on the both sides of body 1, and handle 4 can rotate relative to body 1, the position of adjustment handle 4 relative bodies 1.Distance between the sealed end of handle 4 and the jointed shaft 41 is greater than the distance between the outer end of jointed shaft 41 and clock gauge 2; Handle 4 can turn to the below of body 1 from the top of body 1; Thereby can be when the concrete shrinkage appearance uses; An end that body 1 is equipped with clock gauge 2 is supported to certain height, and an end of body 1 fixed support plate 3 is against ground, and this design makes concrete sample 5 through the weight of self test specimen feeder head 51 fully is resisted against on the back up pad 3.After making body 1 one ends be supported to certain altitude, prevent body 1 the other end because weight inadequately by perk, the distance between the feeder head 21 of jointed shaft 41 and clock gauge 2 is less than the distance between jointed shaft 41 and the back up pad 3.
When using the concrete shrinkage appearance to measure the test specimen shrinkage factor; Handle 4 is turn to the below of body 1; An end that makes body 1 that clock gauge 2 is installed is supported to certain altitude, then concrete sample 5 is placed in the mounting groove 11, and the cell wall of the sidewall of concrete sample 5 and mounting groove 11 leans; The test specimen feeder head 51 of one end of concrete sample 5 is resisted against on the back up pad 3; The test specimen feeder head 51 of the other end and the feeder head 21 of clock gauge 2 against; Because the size dimension of back up pad 3 and the size of concrete sample 5 adapt; And be to be welded on mounting groove 11 end walls, so concrete sample placement back Stability Analysis of Structures, carry out the accurate measurements and calculations of data through clock gauge 2 this moment.
Embodiment two:
The structure of this concrete shrinkage appearance and embodiment one are basic identical, and difference is as shown in Figure 3, and back up pad 3 is fixed on the inwall of mounting groove 11 through some bolts 31, and as preferably, bolt 31 quantity of present embodiment are three.This design can be changed after the wearing and tearing back up pad 3 long-term uses.
The use operating process of concrete shrinkage appearance is identical with embodiment one in the present embodiment.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as body 1, mounting groove 11, clock gauge 2, feeder head 21, back up pad 3, bolt 31, handle 4, jointed shaft 41, concrete sample 5, test specimen feeder head 51 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (10)
1. concrete shrinkage appearance; Comprise body (1); Described body (1) has the mounting groove (11) that is used to hold concrete sample (5), it is characterized in that, is fixed with clock gauge (2) on the inwall of said mounting groove (11) one ends; The feeder head (21) of said clock gauge (2) is fixed with back up pad (3) towards mounting groove (11) other end on the inwall of said mounting groove (11) other end.
2. concrete shrinkage appearance according to claim 1 is characterized in that, the thickness of said back up pad (3) is 2cm～5cm.
3. concrete shrinkage appearance according to claim 2 is characterized in that, said body (1) and back up pad (3) all adopt steel material to process.
4. concrete shrinkage appearance according to claim 3 is characterized in that, said back up pad (3) is fixed on the inwall of mounting groove (11) through the mode of welding.
5. concrete shrinkage appearance according to claim 3 is characterized in that, said back up pad (3) is fixed on the inwall of mounting groove (11) through some bolts (31).
6. according to claim 4 or 5 described concrete shrinkage appearance, it is characterized in that, also be hinged with handle (4) on the said body (1).
7. concrete shrinkage appearance according to claim 6; It is characterized in that; Said handle (4) is the U type, and above-mentioned body (1) is in the opening of handle (4), and the openend of said handle (4) is hinged on the both sides of body (1) through jointed shaft (41).
8. concrete shrinkage appearance according to claim 7 is characterized in that, the distance between the sealed end of said handle (4) and the jointed shaft (41) is greater than the distance between the outer end of jointed shaft (41) and clock gauge (2).
9. concrete shrinkage appearance according to claim 8 is characterized in that, the distance between the feeder head (21) of said jointed shaft (41) and clock gauge (2) is less than the distance between described jointed shaft (41) and the back up pad (3).
10. concrete shrinkage appearance according to claim 9 is characterized in that, said mounting groove (11) assumes diamond in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220219568 CN202583183U (en) | 2012-05-16 | 2012-05-16 | Concrete contractometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220219568 CN202583183U (en) | 2012-05-16 | 2012-05-16 | Concrete contractometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202583183U true CN202583183U (en) | 2012-12-05 |
Family
ID=47252584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220219568 Expired - Lifetime CN202583183U (en) | 2012-05-16 | 2012-05-16 | Concrete contractometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202583183U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
| CN106950356A (en) * | 2017-03-02 | 2017-07-14 | 北京市第三建筑工程有限公司 | Suitable for concrete shrinkage and creep analytical equipment and its method |
| CN108267397A (en) * | 2018-03-13 | 2018-07-10 | 中铁十二局集团第七工程有限公司 | Concrete re- vibrating contraction measuring device |
-
2012
- 2012-05-16 CN CN 201220219568 patent/CN202583183U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
| CN106950356A (en) * | 2017-03-02 | 2017-07-14 | 北京市第三建筑工程有限公司 | Suitable for concrete shrinkage and creep analytical equipment and its method |
| CN106950356B (en) * | 2017-03-02 | 2019-05-21 | 北京市第三建筑工程有限公司 | Suitable for concrete shrinkage and creep analytical equipment and its method |
| CN108267397A (en) * | 2018-03-13 | 2018-07-10 | 中铁十二局集团第七工程有限公司 | Concrete re- vibrating contraction measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |