CN102749439A - Test and evaluation device for segregation of fresh concrete - Google Patents
Test and evaluation device for segregation of fresh concrete Download PDFInfo
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- CN102749439A CN102749439A CN2012102274079A CN201210227407A CN102749439A CN 102749439 A CN102749439 A CN 102749439A CN 2012102274079 A CN2012102274079 A CN 2012102274079A CN 201210227407 A CN201210227407 A CN 201210227407A CN 102749439 A CN102749439 A CN 102749439A
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Abstract
The invention discloses a test and evaluation device for segregation of fresh concrete. The device comprises a vibration component and a testing component. The vibration component comprises a base, a counterweight chamber is provided on the base, an engine chamber is fixed at the upper end of the counterweight chamber, an engine is arranged in the engine chamber and a vibration table connected with the engine is arranged at the upper part of the engine chamber; the testing component is fixed on the vibration table and comprises an upper material containing chamber and a lower material containing chamber, which are communicated with each other, a disc is arranged between the lower material containing chamber and the upper material containing chamber and connected with the upper material containing chamber and the lower material containing chamber through a rotating shaft, and a circular hole is arranged in the disc. The device can test and evaluate segregation conditions of fresh concrete and can effectively prevent damage resulting from segregation of concrete.
Description
Technical field
The invention belongs to civil engineering work concrete construction technology field, relate to a kind of test and evaluation device, especially a kind of fresh concrete segregation phenomenon test and evaluation device.This device is used for test and evaluation fresh concrete segregation situation, and the harm that can effectively prevent concrete disintegration to bring provides reliable experimental.
Background technology
Concrete segregation is that the cohesive strength between the concrete mix composition material is not enough to resist coarse aggregate, and the concrete mix composition is separated from each other, and causes the uneven phenomenon of inner The Nomenclature Composition and Structure of Complexes.Usually show as coarse aggregate and mortar is separated from each other, the bottom of the big mixture of particle deposition that for example density is big, perhaps coarse aggregate overall separation from mixture is come out.
Concrete disintegration influences the Concrete Construction performance, causes sticking jar, plugging, influences the duration etc., reduces economic benefit.Influence the apparent effect of xoncrete structure, concrete surface sand streak, aggregate exposure, reinforcing bar occur and phenomenon such as exposes.Concrete strength is descended significantly, have a strong impact on xoncrete structure and carry cage power, destroy the security performance of structure, serious will causing done over again, and causes enormous economic loss.Concrete homogeneity is poor, causes the contraction at each position of concrete inconsistent, is prone to produce concrete shrinkage crack.Particularly when the construction concrete floor,, shrink sharply increase, serious crack performance occurs because concrete disintegration thickens the grout layer on top layer.Durability of concrete such as concrete impervious, freeze proof have greatly been reduced.
At present, method in common is slump method and the vigorous denseness method of dimension both at home and abroad, and the slump method is to reflect the concrete education resistance ability of reaction indirectly through cohesiveness, for newly mixing cement concrete, because the more suitable slump method of using of slump.Can not directly react the distribution situation of concrete and tie up vigorous denseness method through inner aggregate after the jolt ramming.The present invention is directed to the fresh concrete segregation, can directly reflect concrete segregation level objectively, have very high practical value.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of fresh concrete segregation phenomenon test and evaluation device are provided, fresh concrete segregation situation, the harm that can effectively prevent concrete disintegration to bring can tested and evaluate to this device.
The objective of the invention is to solve through following technical scheme:
This fresh concrete segregation phenomenon test and evaluation device, involving vibrations parts and test parts, said vibrating mass comprises base, base is provided with the counterweight chamber; Upper end in the counterweight chamber is fixed with engine room, and engine is set in engine room; The top of said engine room is provided with the shaking table that is connected with engine; Said test parts is fixed on the shaking table; Said test parts comprise communicate up and down attend material-containing chamber and following material-containing chamber, be provided with disk between said time material-containing chamber and the last material-containing chamber, and between last material-containing chamber and following material-containing chamber, connect through rotating shaft; Offer circular hole on the said disk.
Above-mentioned counterweight chamber is a cylindrical shape, and inside is provided with iron block.
Above-mentioned engine room is a cylindrical shape.
The above-mentioned material-containing chamber of attending is cylindrical tubular with following material-containing chamber; The said lower end of material-containing chamber down is fixed on the iron prop, fixes through attraction between said iron prop lower end and the shaking table.
Above-mentioned disk offers center hole in the center, and the diameter of said center hole is identical with the internal diameter of last material-containing chamber and following material-containing chamber; Center hole side at disk also offers another circular hole, and two circular holes directly are provided with the mounting hole that said rotating shaft is passed.
Further, the center hole of disk is provided with rubber washer.
Above-mentioned attending between material-containing chamber and the following material-containing chamber is provided with pin, and the central shaft that material-containing chamber or following material-containing chamber are gone up in said pin and rotating shaft relatively is symmetrical set.
Above-mentioned upper end of attending material-containing chamber is provided with charging aperture.
Further, in preferred plan of the present invention, last material-containing chamber is 75mm with the barrel bore of following material-containing chamber, and external diameter 80mm highly is 150mm; Disc radius 265mm, circle hole radius 75mm on the disk.
The present invention's technology further improves and characteristics are:
1, the present invention can reasonably simulate the vibrate lamination of aggregate and thin pulp in the concrete later of fresh concrete.
2, the present invention can evaluate fresh concrete segregation situation objectively.So that revise concrete mix early, reduce the harm that segregation brings.
3, apparatus structure of the present invention is simple, and is easy to operate, and energy resource consumption is few, good economy performance, and practical value is high.
Description of drawings
Fig. 1 is a sectional view of the present invention;
Fig. 2 is the vertical view of disk 4 among the present invention.
Wherein: 1 is charging aperture; 2 is to attend material-containing chamber; 3 are rotating shaft; 4 is disk; 5 are following material-containing chamber; 6 is iron prop; 7 is shaking table; 8 is magnet; 9 is engine room; 10 is the counterweight chamber; 11 is base; 12 is rubber washer.
Embodiment
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1, fresh concrete segregation phenomenon test of the present invention and evaluation device, involving vibrations parts and test parts.Wherein vibrating mass comprises base 11, and base 11 is provided with counterweight chamber 10; Be fixed with engine room 9 in the upper end of counterweight chamber 10, in engine room 9, engine be set; The top of engine room 9 is provided with the shaking table 7 that is connected with engine; Test parts is fixed on the shaking table 7; Test parts comprise communicate up and down attend material-containing chamber 2 and following material-containing chamber 5, be provided with disk 4 between following material-containing chamber 5 and the last material-containing chamber 2, and between last material-containing chamber 2 and following material-containing chamber 5 through rotating shaft 3 connections; Offer circular hole (like Fig. 2) on the disk 4.Said counterweight chamber 10 is cylindrical shape with engine room 9, and 10 inside, counterweight chamber are provided with iron block.
The material-containing chamber 2 of attending of the present invention is cylindrical tubular with following material-containing chamber 5; The lower end of following material-containing chamber 5 is fixed on the iron prop 6, attracts fixing through magnet 8 between iron prop 6 lower ends and the shaking table 7.
Referring to Fig. 2, disk 4 offers center hole in the center, and the diameter of said center hole is identical with the internal diameter of last material-containing chamber 2 and following material-containing chamber 5; Center hole side at disk 4 also offers another circular hole, and two circular holes directly are provided with the mounting hole that said rotating shaft 3 is passed.The center hole of disk 4 is provided with rubber washer 12.
Said attending between material-containing chamber 2 and the following material-containing chamber 5 is provided with pin 13, and pin 13 is symmetrical set with the central shaft that material-containing chamber 2 or following material-containing chamber 5 are gone up in rotating shaft 3 relatively.The upper end of last material-containing chamber 2 is provided with charging aperture 1.
The engine that is provided with in the engine room 9 of the present invention, its effect are to drive 7 vibrations of the shaking table on its top.
Magnet 8, its effect are the iron props 6 that attracts the test parts bottom, the fixation test parts.
Shaking table 7, its effect make the whole vibrations of test parts when being test.
Iron prop 6, it is a cylindrical shape, just in time can embed in the shaking table 7, attracts each other with magnet 8, makes two parts be linked to be integral body.
Down material-containing chamber 5 of the present invention, attend material-containing chamber 2, disk 4; Its effect is can be held by it when material-containing chamber 2 rotates when attending; And attending the circular hole of material-containing chamber's 2 concrete from the disk 4 discharged, rotating shaft 3; Its effect is to make that material-containing chamber 2 can move up and down around it, charging aperture 1, and the concrete that mixes gets into material-containing chamber, rubber washer 12 through charging aperture 1, is clipped in up and down between the material-containing chamber; Its effect be prevent concrete mortar from flow out the slit between the material-containing chamber up and down, pin 13, its effect is that material-containing chamber up and down is fixed together.
In most preferred embodiment of the present invention, last material-containing chamber 2 is 75mm with the barrel bore of following material-containing chamber 5, and external diameter 80mm highly is 150mm; Disk 4 radius 265mm, circle hole radius 75mm on the disk.
Fresh concrete segregation phenomenon test of the present invention is following with the course of work of evaluation device:
The pin 13 that (1) will go up between material-containing chamber 2 and the following material-containing chamber 5 is locked, and the quality of weighing test parts vertically is placed on the top test parts on the smooth ground then.
The concrete to be tested that (2) will mix is carefully contained from charging aperture 1 equably and is attend material-containing chamber 2 and the following material-containing chamber 5.The little test parts of lifting of both hands is carefully gently knocked under the 2-3 on ground, eliminates the macropore in the concrete.Reduce test error.And make TOC concordant with charging aperture 1 bottom.
(3) test parts carefully is put on the vibrating mass.Notice that vibrating mass must be placed on the level ground.
(4) start vibrating mass, make shaking platform 7 up-down vibration, and motoring ring test parts up-down vibration.
(5) stop vibration behind the vibration 10s, attend material-containing chamber 2 tops with the ruler measurement rapidly and do not have the height of concrete that fraction cylinder, thereby obtain material-containing chamber's 2 concrete height.Aforesaid operations needs in 10s, to accomplish.
(6) open pin 13 rapidly, little material-containing chamber 2 lower right corner of lifting can be till rotate at the center with rotating shaft 3 up to attending material-containing chamber 2.To go up material-containing chamber 2 and rotate 180 °, receive the concrete that flows out from disk 4 left end circular holes with tube for feed.
(7) take off test parts, the quality of weighing test parts this moment obtains down material-containing chamber's 5 quality of concrete, calculates down material-containing chamber's 5 concrete density p thus
1
(8) material-containing chamber's 2 quality of concrete are attend in weighing, calculate material-containing chamber's 2 concrete density p
2
(9) calculate concrete disintegration coefficient I=ρ
1/ ρ
2The fresh concrete segregation possibility of the big more explanation preparation of the value of I is big more.
Claims (9)
1. a fresh concrete segregation phenomenon is tested and evaluation device, it is characterized in that, and involving vibrations parts and test parts, said vibrating mass comprises base (11), base (11) is provided with counterweight chamber (10); Be fixed with engine room (9) in the upper end of counterweight chamber (10), in engine room (9), engine be set; The top of said engine room (9) is provided with the shaking table (7) that is connected with engine; Said test parts is fixed on the shaking table (7); Said test parts comprise communicate up and down attend material-containing chamber (2) and following material-containing chamber (5); Be provided with disk (4) between said material-containing chamber (5) down and the last material-containing chamber (2), and between last material-containing chamber (2) and following material-containing chamber (5), connect through rotating shaft (3); Said disk offers circular hole on (4).
2. fresh concrete segregation phenomenon test according to claim 1 and evaluation device is characterized in that said counterweight chamber (10) is a cylindrical shape, and inside is provided with iron block.
3. fresh concrete segregation phenomenon test according to claim 1 and evaluation device is characterized in that said engine room (9) is a cylindrical shape.
4. fresh concrete segregation phenomenon according to claim 1 test and evaluation device is characterized in that, saidly attend material-containing chamber (2) and following material-containing chamber (5) is cylindrical tubular; The said lower end of material-containing chamber (5) down is fixed on the iron prop (6), attracts fixing between said iron prop (6) lower end and the shaking table (7) through magnet (8).
5. fresh concrete segregation phenomenon test according to claim 1 and evaluation device; It is characterized in that; Said disk (4) offers center hole in the center, and the diameter of said center hole is identical with the internal diameter of last material-containing chamber (2) and following material-containing chamber (5); Center hole side at disk (4) also offers another circular hole, and two circular holes directly are provided with the mounting hole that said rotating shaft (3) is passed.
6. fresh concrete segregation phenomenon test according to claim 5 and evaluation device is characterized in that the center hole of disk (4) is provided with rubber washer (12).
7. fresh concrete segregation phenomenon test according to claim 1 and evaluation device; It is characterized in that; Said attending between material-containing chamber (2) and the following material-containing chamber (5) is provided with pin (13), and the central shaft that material-containing chamber (2) or following material-containing chamber (5) are gone up in said pin (13) and rotating shaft (3) relatively is symmetrical set.
8. fresh concrete segregation phenomenon test according to claim 1 and evaluation device is characterized in that said upper end of attending material-containing chamber (2) is provided with charging aperture (1).
9. fresh concrete segregation phenomenon test according to claim 1 and evaluation device is characterized in that the said barrel bore of attending material-containing chamber (2) and following material-containing chamber (5) is 75mm, and external diameter 80mm highly is 150mm; Disk (4) radius 265mm, circle hole radius 75mm on the disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227407.9A CN102749439B (en) | 2012-07-03 | 2012-07-03 | Test and evaluation device for segregation of fresh concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227407.9A CN102749439B (en) | 2012-07-03 | 2012-07-03 | Test and evaluation device for segregation of fresh concrete |
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| CN102749439A true CN102749439A (en) | 2012-10-24 |
| CN102749439B CN102749439B (en) | 2015-04-22 |
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| CN201210227407.9A Expired - Fee Related CN102749439B (en) | 2012-07-03 | 2012-07-03 | Test and evaluation device for segregation of fresh concrete |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865156A (en) * | 2015-05-15 | 2015-08-26 | 长安大学 | Device and method for evaluating segregation degree of cement concrete |
| CN104931678A (en) * | 2015-07-06 | 2015-09-23 | 北京矿冶研究总院 | Mine cemented filling slurry segregation degree detection and evaluation method |
| CN105973751A (en) * | 2016-06-30 | 2016-09-28 | 长安大学 | Device and method for acquiring segregation degrees of cement concrete under horizontal centrifugal effects |
| CN106442945A (en) * | 2016-09-05 | 2017-02-22 | 中交第四航务工程局有限公司 | Test method for evaluating layering condition of fresh concrete on site and influence of layering on hardened concrete |
| CN107422106A (en) * | 2017-08-03 | 2017-12-01 | 河海大学 | A kind of method that in situ quantitation assesses the anti-isolation characteristic of fresh concrete material |
| CN107576781A (en) * | 2017-09-15 | 2018-01-12 | 中国葛洲坝集团勘测设计有限公司 | A kind of device and method for determining pervious concrete service behaviour |
| CN108107193A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨工业大学 | A kind of test device and method of fresh concrete education resistance energy |
| CN108931626A (en) * | 2018-05-04 | 2018-12-04 | 武汉理工大学 | A kind of chutable concrete isolation rate test barrel |
| CN111624329A (en) * | 2020-06-11 | 2020-09-04 | 河南建达工程咨询有限公司 | Supervision and inspection method for field workability of high-performance concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865156A (en) * | 2015-05-15 | 2015-08-26 | 长安大学 | Device and method for evaluating segregation degree of cement concrete |
| CN104931678A (en) * | 2015-07-06 | 2015-09-23 | 北京矿冶研究总院 | Mine cemented filling slurry segregation degree detection and evaluation method |
| CN105973751A (en) * | 2016-06-30 | 2016-09-28 | 长安大学 | Device and method for acquiring segregation degrees of cement concrete under horizontal centrifugal effects |
| CN106442945A (en) * | 2016-09-05 | 2017-02-22 | 中交第四航务工程局有限公司 | Test method for evaluating layering condition of fresh concrete on site and influence of layering on hardened concrete |
| CN106442945B (en) * | 2016-09-05 | 2019-08-23 | 中交第四航务工程局有限公司 | The test method that a kind of evaluable live fresh concrete layering situation and layering influence maturing |
| CN107422106A (en) * | 2017-08-03 | 2017-12-01 | 河海大学 | A kind of method that in situ quantitation assesses the anti-isolation characteristic of fresh concrete material |
| CN107422106B (en) * | 2017-08-03 | 2019-08-06 | 河海大学 | A kind of method of the anti-isolation characteristic of in situ quantitation assessment fresh concrete material |
| CN107576781A (en) * | 2017-09-15 | 2018-01-12 | 中国葛洲坝集团勘测设计有限公司 | A kind of device and method for determining pervious concrete service behaviour |
| CN108107193A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨工业大学 | A kind of test device and method of fresh concrete education resistance energy |
| CN108931626A (en) * | 2018-05-04 | 2018-12-04 | 武汉理工大学 | A kind of chutable concrete isolation rate test barrel |
| CN111624329A (en) * | 2020-06-11 | 2020-09-04 | 河南建达工程咨询有限公司 | Supervision and inspection method for field workability of high-performance concrete |
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