CN2532488Y - Concrete expansion/contraction tester - Google Patents
Concrete expansion/contraction tester Download PDFInfo
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- CN2532488Y CN2532488Y CN 02226866 CN02226866U CN2532488Y CN 2532488 Y CN2532488 Y CN 2532488Y CN 02226866 CN02226866 CN 02226866 CN 02226866 U CN02226866 U CN 02226866U CN 2532488 Y CN2532488 Y CN 2532488Y
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Abstract
The utility model relates to a new concrete inflation and shrinkage measuring instrument belonging to a measuring instrument for measuring the inflation and shrinkage of a building material. The measuring instrument includes a testing platform, two parallel tracks which are arranged on the surface of the testing platform, and two meter brackets; wherein a steadying tackle is arranged on each of the tracks, the meter brackets are respectively arranged at the right end and the left end of the testing platform, and a testing clock gauge is arranged on each meter bracket. The utility model is simple in structure and convenient for operation and use, with once positioning kept until the testing experiment of a check bar is completed, and the check bar needs not moving in the whole testing process, thereby various errors of the current instruments can be effectively overcome. The friction coefficient of a pulley actually in the utility model is 0.11, hereby the friction drag to the check bar deformation is one fourth of that of the current SP-540 instrument.
Description
Technical field:
The utility model relates to a kind of new concrete expansion and shrinks analyzer, and it belongs to a kind of building materials expansion and shrinks the determining instrument of size, particularly concrete expansion contraction size measurement instrument.
Technical background:
Concrete, be converted into by mecystasis in the process of solid state, variation along with generation, development and the concrete environment temperature and humidity of living in of hydrated reaction of cement, the trace that the concrete own vol must occur changes. and concrete expands or shrinks the size of inviting quantitative changeization, the quality of cracking resistance on the decision coagulation, and in the unearthed works of the to a certain degree influence note length in serviceable life.Accurately measure concrete expansion and shrink,, control concrete crack quantity and width, reduce the percolating water quality accident of construction work, have reality and important meaning for improving concrete cracking resistance.Existing this class determining instrument, as SP-540 concrete shrinkage dilatometer, mainly form by four parts: test table, par, the slip testing jig is measured dial gauge for one.There is following defective in the measurement of this surveying instrument: during kinetic measurement, test specimen is put the surveying work platform, aligning accuracy is difficult to guarantee that during measurement, termination, measurement bay location can't be held each the same with the elasticity that studies end measurement termination at every turn.The general total shrinkage factor of test specimen is ten thousand/3-4, and the runout error that is at every turn caused by contraposition is everlasting between ten thousand/1-3, and the numerical value of acquisition is insincere.If use the static measurement method, test specimen is placed on two brace summers of surveying work platform, the contraction of test specimen is subjected to frictional resistance bigger between brace summer and the test specimen, because measurement bay one end is a positioning end, the other end is for measuring dial gauge, and test specimen is in the contraction or expansion of positioning end, and directly influence is the tightness of termination, measurement bay location, be difficult to pass on the reading dial gauge, therefore the numerical value that reads is inaccurate.
Technology contents:
The purpose of this utility model is to provide a kind of test operation convenient, and the accurate new concrete of reliable test result expands and shrinks analyzer.
The purpose of this utility model is achieved in that
A kind of new concrete expands and shrinks analyzer, it comprises that two of test platforms are set in parallel in the track and the instrument support of test platform upper surface, on described track, be provided with the support coaster, described instrument support branch is located at two ends, the described test platform left and right sides, is equipped with the test clock gauge on described two instrument supports.On described track, be provided with two coasters.Be that described support coaster is made up of support platform and the pulley that is located under the support platform.Described support coaster is divided into four pulleys.
The utility model is simple in structure, easy for operation, one-time positioning is finished up to the testing experiment of test specimen, whole measuring process need not to move test specimen, therefore can effectively overcome the existing caused positioning error of the dynamic contraposition of instrument, and the reading error value that elasticity difference is caused between measurement bay termination, location and the concrete sample measurement termination.The friction factor that the pulley of the utility model actual measurement rolls on metal track is 0.11, and therefore the frictional resistance to test piece deformation is 1/4th of existing SP-540 instrument.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model
Accompanying drawing 2 is the vertical view of the utility model accompanying drawing 1
Embodiment:
Be embodiment of the present utility model with accompanying drawing 1,2 below, the utility model be further detailed:
The utility model comprises a test platform 1, at the upper surface of test platform 1 two tracks 6 that be arranged in parallel, is provided with two support coasters 4 on described track 6, and described support coaster 4 is made up of support platform 41 and the pulley 5 that is located under the support platform 41; Should guarantee fully that support platform 41 is on the same surface level, can guarantee the precision of measuring like this.Friction between four support coasters 4 that pulley 5 supports, it and track 6 is very little, has reduced concrete suffered frictional resistance in test greatly, and therefore the concrete deformation value that records is more accurate.Described instrument support was located at the two ends, the left and right sides of described test platform 1 in 3 minutes, was equipped with test clock gauge 2 on described two instrument supports 3.Being provided with of two test clock gauges can realize test from both sides, can reflect it is the variation that concrete expansion is shunk more accurately.Test clock gauge 2 is located at the outside of instrument support 3, and in the inboard of two instrument supports 3, correspondence is being provided with pilot pin 7.Test platform 1 is horizontal in order to guarantee to test, and uses two screws to regulate its level at the two ends of test table 1.
Assay method of the present utility model is as follows: at first measure the initial length value of concrete sample, test specimen is placed on two coasters 4, simply locate by the coaster locating device, this location is controlled by pilot pin 7.Simultaneously left and right two dial gauges are adjusted to initial zero-bit.During reading, directly read the reading value of left and right two dial gauges,, be the absolute deformation value of test specimen this moment left and right two numerical value accumulative total, with the absolute deformation value divided by the initial length value that studies, for the concrete expansivity of test specimen this moment (on the occasion of) or shrinkage factor (negative value).
Claims (4)
1, a kind of new concrete expands and shrinks analyzer, it comprises a test platform (1), two track (6) and instrument supports (3) that are set in parallel in test platform (1) upper surface, it is characterized in that on described track (6), being provided with support coaster (4), described instrument support (3) branch is located at described test platform (1) two ends, the left and right sides, is equipped with test clock gauge (2) on described two instrument supports.
2, the new concrete described in claim 1 expands and shrinks analyzer, it is characterized in that being provided with on described track (6) two coasters.
3, the new concrete described in claim 2 expand to shrink analyzer, and its spy is that described support coaster (4) is made up of support platform (41) and the pulley (5) that is located under the support platform (41).
4, the new concrete described in claim 3 expands and shrinks analyzer, it is characterized in that described support coaster (4) has four pulleys (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02226866 CN2532488Y (en) | 2002-04-12 | 2002-04-12 | Concrete expansion/contraction tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02226866 CN2532488Y (en) | 2002-04-12 | 2002-04-12 | Concrete expansion/contraction tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2532488Y true CN2532488Y (en) | 2003-01-22 |
Family
ID=33703767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02226866 Expired - Fee Related CN2532488Y (en) | 2002-04-12 | 2002-04-12 | Concrete expansion/contraction tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2532488Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269556A (en) * | 2011-05-09 | 2011-12-07 | 西安建筑科技大学 | Double-precision-control contraction measuring instrument for regenerated concrete |
| CN104297137B (en) * | 2014-10-09 | 2016-09-28 | 河海大学 | A kind of full-automatic water cement-based material convergent-divergent performance aircraft and control method thereof |
| CN106526147A (en) * | 2016-11-30 | 2017-03-22 | 东南大学 | Device and method for measuring expansion performance of mortar or concrete under vertical semi-submerged condition |
| CN107514960A (en) * | 2017-09-29 | 2017-12-26 | 甘肃建科技术试验检测有限责任公司 | A kind of concrete expansion, shrinkage test length measuring instrument and measuring method |
| CN108459155A (en) * | 2018-06-02 | 2018-08-28 | 宁夏大学 | Curing concrete contraction distortion test device in a kind of water |
| CN110118868A (en) * | 2019-04-18 | 2019-08-13 | 广州建筑产业研究院有限公司 | A kind of experimental rig and its test method of grouting material expansion rate |
| CN113109551A (en) * | 2021-03-30 | 2021-07-13 | 海南华盛混凝土有限公司 | Concrete collapse and expansion testing device |
-
2002
- 2002-04-12 CN CN 02226866 patent/CN2532488Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269556A (en) * | 2011-05-09 | 2011-12-07 | 西安建筑科技大学 | Double-precision-control contraction measuring instrument for regenerated concrete |
| CN102269556B (en) * | 2011-05-09 | 2012-12-19 | 西安建筑科技大学 | Double-precision-control contraction measuring instrument for regenerated concrete |
| CN104297137B (en) * | 2014-10-09 | 2016-09-28 | 河海大学 | A kind of full-automatic water cement-based material convergent-divergent performance aircraft and control method thereof |
| CN106526147A (en) * | 2016-11-30 | 2017-03-22 | 东南大学 | Device and method for measuring expansion performance of mortar or concrete under vertical semi-submerged condition |
| CN106526147B (en) * | 2016-11-30 | 2019-06-25 | 东南大学 | A kind of device and method that the expansion character measuring mortar or concrete under the conditions of vertical half soaks measures |
| CN107514960A (en) * | 2017-09-29 | 2017-12-26 | 甘肃建科技术试验检测有限责任公司 | A kind of concrete expansion, shrinkage test length measuring instrument and measuring method |
| CN108459155A (en) * | 2018-06-02 | 2018-08-28 | 宁夏大学 | Curing concrete contraction distortion test device in a kind of water |
| CN110118868A (en) * | 2019-04-18 | 2019-08-13 | 广州建筑产业研究院有限公司 | A kind of experimental rig and its test method of grouting material expansion rate |
| CN110118868B (en) * | 2019-04-18 | 2022-03-15 | 广州建筑产业研究院有限公司 | Grouting material expansion rate test device and test method thereof |
| CN113109551A (en) * | 2021-03-30 | 2021-07-13 | 海南华盛混凝土有限公司 | Concrete collapse and expansion testing device |
| CN113109551B (en) * | 2021-03-30 | 2023-06-16 | 海南华盛混凝土有限公司 | Concrete slump expansion testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |