CN103743642B - Method suitable for measuring erosion abrasion resistance of hydraulic concrete - Google Patents
Method suitable for measuring erosion abrasion resistance of hydraulic concrete Download PDFInfo
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- CN103743642B CN103743642B CN201310629719.7A CN201310629719A CN103743642B CN 103743642 B CN103743642 B CN 103743642B CN 201310629719 A CN201310629719 A CN 201310629719A CN 103743642 B CN103743642 B CN 103743642B
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Abstract
The invention provides a method suitable for measuring erosion abrasion resistance of hydraulic concrete. The method comprises: putting concrete aggregate with a particle size of 40 mm or less on a vibration table for vibration demolding, and putting in a standard curing room to cure to a specified age; immersing a test piece in water for 48-52 h, removing water and weighing; grading a punching and grinding medium: choosing 25 steel balls with a diameter of 12.7 mm and cut circle hexahedral steel balls, wherein the cut circle hexahedral steel balls comprise 35 cut circle hexahedral steel balls with a diameter of 19.1 mm, 17 cut circle hexahedral steel balls with a diameter of 25.4 mm and 8 cut circle hexahedral steel balls with a diameter of 30.0 mm; performing cutting on the hexahedral steel balls according to 5% of the corresponding steel ball diameter, so as to obtain the hexahedral steel balls with corner angles; and operating instrument: adjusting the distance between a stirring paddle and the test piece to 33-45 mm, adding water until the water face is higher than the test piece surface by 162-168 mm, stirring and punching and grinding under the condition of 1200 r/min for 72 h, taking out the test piece, cleaning, removing water and weighing for obtain a test piece according with standards.
Description
Technical field
The present invention relates to the resistant abrasion technology of water conservancy project, be particularly useful for the impact-resisting wear-resisting test of concrete for hydraulic structure interior it is adaptable to
Bed load rushes mill experimental study to concrete for hydraulic structure over-speed test.
Background technology
All there is cement concrete in existing " concrete for hydraulic structure testing regulationss " sl352-2006 and dl/t5150-2001
Resistant abrasion test method, one of which is steel ball method under water, mainly defines following parameter, one is under water in the method
The level of steel ball is joined and size；Two is the rotating speed defining anti-impact grinding machine；Three is the time of punching mill.Therefore in Practical Project, high
The sandstone containing in fast current, mainly Rolling Stone are the most serious to concrete punching mill, and to big particle diameter steel ball volume in current specifications
Very few, impact punching mill test effect；Secondly, the steel ball in the method for steel ball under water in current specifications is smooth ball, steel ball quantity
Amount 10,35,25；Diameter is φ 25.4 ± 0.1 respectively；φ19.1±0.1；φ12.7±0.1.This is also multi-angular with actual Rolling Stone
Shape be not inconsistent, necessarily affect test effect, and larger with practical situation gap.
The inventive method changes steel ball level under water and joins and size shape, mainly has: one to be with reference to bed load granule at 2 points
The practical situation that level is joined, the level that have adjusted punching mill matter steel ball is joined, i.e. the quantity of steel ball and particle size content, is allowed to more meet engineering in fact
Border situation.Two be in current specifications rushing mill matter be smooth sphere, and the bed load in Practical Project be gravel or cobble, lead to
Often there are corner angle, round steel ball is cut into circular hexahedron by this test method, be allowed to be provided with corner angle, more meet reality, obtain
Accurately science data Guiding Practice, there is application and popularization value.
Content of the invention
The mesh of the present invention is: grinds the method for testing of performance for concrete for hydraulic structure anti-impact, changes steel ball level under water and join,
And smooth sphere will be made to be cut into circular hexahedron, more meet reality it is achieved that design object.
The object of the present invention is achieved like this: a kind of method of testing being suitable for water conservancy project concrete anti-abrasion performance, step by step
Rapid enforcement:
Step 1 test specimen and rush grinding media preparation:
A, aggregate particle diameter≤40mm, three test specimens are one group, during molding, by concreting to circular die trial
In, and it is positioned over bumper, shake density 20s, the demoulding after 24h, and be positioned in standard curing room, to regulation age;
Soak 48-52h in b, test specimen water, wipe moisture content, weigh the weight of each test specimen；
C, rush grinding media level and join: the steel ball of a diameter of 12.7mm 25, the circular hexahedron steel ball of well cutting is respectively as follows: directly
Footpath 19.1mm, quantity 35；Diameter 25.4mm, quantity 17；Diameter 30.0mm, quantity 8;
D, hexahedron steel ball reprocessing: the steel ball of diameter 19.1mm, 25.4mm, 30.0mm with steel ball size is respectively
5% excision, must be with the hexahedron steel ball of corner angle；
Step 2 instrumentation:
1) the adjustment distance away from test specimen for the stirring paddle is 33-45mm；
2) that puts in steel cylinder that level joins rushes grinding media steel ball in surface of test piece, and adds water to the water surface and exceed surface of test piece
162-168mm, start, stirring punching mill, time 72h under the conditions of 1200 revs/min, take out test specimen cleaning and wipe moisture content, weigh
The weight of each test specimen, wherein every 24h, adds water into steel cylinder, keeps former height of water level.
Described method of testing, is fixed on installation stirring paddle 2 in the steel cylinder 1 on base 5, in stirring paddle 2 and concrete examination
It is evenly equipped with small ball and hexahedron steel ball 3 between part 4, wherein spacer bar 9 is set in the bottom of concrete sample 4；Uniformly
Osculum 6 in concrete sample 4 bottom connects the osculum 6 on base 5, and the lower end of its osculum 6 is installed with drain valve 7；
The bottom of steel cylinder 1 and setting sealed rubber packing ring 10 on base 5 and fastening bolt.
The mechanism of the present invention and effect: research shows, when the abrasive particle with sharp corners and the suitable angle of attack and material surface
When there is relative motion, will material be carried out being cut as cutter and be formed chip, under the same conditions, be all
During 90 ° of angle of shocks, bigger than the abrasion of circular abrasive particle 4 times of polygon abrasive particle, present invention improves over the shape of larger three-level punching mill steel ball
Looks, make circular hexahedron；Meanwhile, situation is joined according to mountain area detrusion matter size and level, have changed punching mill steel ball
Level is joined, and closer to the situation of test actual punching mill, shows technological progress.
Brief description
The invention will be further described below in conjunction with the accompanying drawings.
Accompanying drawing 1 is the structural representation of present invention punching mill instrument:
As shown in the figure: 1- steel cylinder, 2- stirring paddle, 3- small ball and circular hexahedron, 4- concrete sample, 5- base, 6-
Osculum, 7- drain valve, 8- water, 9- reinforcing bar, 10- rubber washer.
Specific embodiment
It is described further with reference to embodiment.
First, the designing points of this method
1) combine bed load grain composition practical situation, have adjusted punching mill matter steel ball level join, that is, the quantity of steel ball and
Particle size content more meets engineering practice.
2) steel ball number of punching mill matter and Particle size requirements see table 1；By orthogonal for above for diameter 20mm steel ball six
Face, is cut into plane by the 5% of steel ball size, makes steel ball become circular hexahedron, is allowed to be provided with corner angle, more meets actual feelings
Condition.
Steel ball number in 1 test method of table and Particle size requirements
| Steel ball number | 8 | 17 | 35 | 25 |
| Diameter mm | φ30.0±0.1 | φ25.4±0.1 | φ19.1±0.1 | φ12.7±0.1 |
2nd, the contrast of this method of testing and current specifications test method
In order to verify the effect of the resistant abrasion method of testing to the present invention, carry out the existing resistant abrasion test of 5 groups of concrete altogether
Contrast, be shown in Table 2.
Table 2 resistant abrasion test method of the present invention and current specifications comparison of test results
Find out from above test result, this method is directed to the concrete of different gradation, its wear rate is doubled, abrasion
Effect is significant improves, preferably the abrasion condition in reaction Practical Project.
3rd, the concrete operations of method
1) prepare abrasion resistance concrete test specimen it is allowed to aggregate size is 40mm, test with three test specimens for one group, molding
When, by concreting to circular die trial, and it is positioned over bumper, shake density 20s, the demoulding after 24 hours, and be positioned over
In standard curing room, to regulation age.
2), before testing, test specimen need at least soak 48h in water.
3), when testing, take out test specimen, wipe surface moisture content, weigh the weight of each test specimen.
4) reinforcing bar of two φ 6mm is padded on base plate, weighed concrete sample is placed on reinforcing bar, and make to mix
Solidifying soil surface, perpendicular to rotating shaft, puts steel cylinder, and the steel cylinder that is tightened is with the bolt of base so as to seal.
5) stirring paddle is arranged in rotating shaft, stirring paddle bottom is 38mm away from surface of test piece, the position of adjustment steel cylinder and base
Put and make rotating shaft centering.
6) put into diameter 12.7mm steel ball 25 in steel cylinder, the circular hexahedron punching mill steel ball of well cutting is respectively as follows: directly
Footpath 19.1mm, quantity 35；Diameter 25.4mm, quantity 17；Diameter 30.0mm, quantity 8;It is positioned over surface of test piece, and plus
Water exceeds surface of test piece 165mm to the water surface；Wherein hexahedron steel ball is reprocessed: by diameter 19.1mm, 25.4mm, 30.0mm
Steel ball, the excision being 5% with steel ball size respectively, must be with the hexahedron steel ball of corner angle.
7) confirm rotating shaft rotating speed after 1200rpm, start.
8) every 24h, 2 water are added in steel cylinder to former heights of water level.
9) add up punching mill 72h, take out test specimen, clean up, wipe surface moisture content, weigh the weight of each test specimen, and with
Before test, each test specimen weight carries out the calculating of anti-abrasion strength.
4th, the instrument explanation of method of testing:
It is fixed on installation stirring paddle in the steel cylinder on base, be evenly equipped with small ball between stirring paddle and concrete sample
With hexahedron steel ball, wherein spacer bar is set in the bottom of concrete sample；It is distributed on the osculum of concrete sample bottom
Osculum on connection base, the lower end of its osculum is installed with drain valve；Setting sealing rubber on the bottom of steel cylinder with base
Leather washer and fastening bolt.
Claims (2)
1. a kind of method of testing being suitable for water conservancy project concrete anti-abrasion performance it is characterised in that: step by step implement:
Step 1 test specimen and rush grinding media preparation:
It is fixed on setting stirring paddle (2) in the steel cylinder (1) on base (5), between stirring paddle (2) and concrete sample (4)
It is evenly equipped with steel ball and circular hexahedron steel ball (3)；
A, aggregate particle diameter are≤40mm, and three test specimens are one group, during molding, by concreting to circular die trial,
And it is positioned over bumper, shake density 20s, the demoulding after 24h, and be positioned in standard curing room, to regulation age;
Soak 48-52h in b, test specimen water, wipe moisture content, weigh the weight of each test specimen；
C, rush grinding media and be divided into two kinds, a kind of is steel ball, a kind of for circular hexahedron steel ball；Level is joined as follows:
A diameter of 12.7mm steel ball, quantity 25；A diameter of 19.1mm circle hexahedron steel ball, quantity 35；A diameter of
25.4mm circle hexahedron steel ball, quantity 17；A diameter of 30.0mm circle hexahedron steel ball, quantity 8；
D, circular hexahedron steel ball cutting process: treatment principle is, for the steel ball of 19.1mm, 25.4mm and 30.0mm diameter,
By its up and down, left and right and orthogonal six faces in front and back, inwardly cut 5% thickness of steel ball size so as to form one from surface
Individual plane, steel ball surface forms six planes, then can complete the process of a circular hexahedron steel ball；
Step 2 instrumentation:
1) the adjustment distance away from test specimen for the stirring paddle is 33-45mm；
2) that puts in steel cylinder that level joins rushes grinding media steel ball in surface of test piece, and adds water to the water surface and exceed surface of test piece 162-
168mm, start, stirring punching mill, time 72h under the conditions of 1200 revs/min, take out test specimen cleaning and wipe moisture content, weigh each
The weight of test specimen, wherein every 24h, adds water into steel cylinder, keeps former height of water level.
2. according to the method for testing described in claim 1 it is characterised in that: wherein in the setting of the bottom of concrete sample (4)
Support reinforcing bar (9)；It is distributed on the osculum (6) that the osculum (6) of concrete sample (4) bottom connects on base (5), its draining
The lower end in hole (6) is installed with drain valve (7)；The upper setting sealing of the bottom of steel cylinder (1) and base (5) rubber washer (10) with
The bolt of fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629719.7A CN103743642B (en) | 2013-11-28 | 2013-11-28 | Method suitable for measuring erosion abrasion resistance of hydraulic concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629719.7A CN103743642B (en) | 2013-11-28 | 2013-11-28 | Method suitable for measuring erosion abrasion resistance of hydraulic concrete |
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| CN103743642A CN103743642A (en) | 2014-04-23 |
| CN103743642B true CN103743642B (en) | 2017-01-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571970B (en) * | 2016-02-04 | 2018-01-19 | 黄功学 | Concrete impact-resistant mill testing system and its test method |
| CN105628536A (en) * | 2016-03-15 | 2016-06-01 | 上海出入境检验检疫局机电产品检测技术中心 | Device for testing abrasion resistance of coating of container and test method of device |
| CN106404581A (en) * | 2016-12-14 | 2017-02-15 | 福建省建筑科学研究院 | Concrete sand washing experiment apparatus for off-center shaft type irrigation work |
| CN106840924B (en) * | 2017-03-01 | 2023-03-28 | 中电建十一局工程有限公司 | Impact resistance tester for simulating impact of large-particle bed load |
| CN109916756A (en) * | 2019-02-28 | 2019-06-21 | 武汉理工大学 | A kind of experimental rig and its test method of test maritime concrete scour & wear resistance energy |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886998A (en) * | 2010-06-02 | 2010-11-17 | 武汉大学 | Low-noise pollution-free full-automatic concrete anti-abrasion tester |
| CN102331381A (en) * | 2011-09-19 | 2012-01-25 | 水利部交通运输部国家能源局南京水利科学研究院 | High-speed underwater steel ball abrasion test method |
| CN102841027A (en) * | 2011-06-21 | 2012-12-26 | 厦门市宏业工程建设技术有限公司 | Test device and test method for measuring erosion and abrasion resistance of hydraulic concrete |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886998A (en) * | 2010-06-02 | 2010-11-17 | 武汉大学 | Low-noise pollution-free full-automatic concrete anti-abrasion tester |
| CN102841027A (en) * | 2011-06-21 | 2012-12-26 | 厦门市宏业工程建设技术有限公司 | Test device and test method for measuring erosion and abrasion resistance of hydraulic concrete |
| CN102331381A (en) * | 2011-09-19 | 2012-01-25 | 水利部交通运输部国家能源局南京水利科学研究院 | High-speed underwater steel ball abrasion test method |
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Inventor after: Wang Huaiyi Inventor after: He Chuanqing Inventor after: TUERHONG TUERDI Inventor after: Gu Jiajun Inventor after: Wang Yongtao Inventor after: He Ruofei Inventor before: Wang Huaiyi Inventor before: He Chuanqing Inventor before: TUERHONG TUERDI |
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Granted publication date: 20170125 Termination date: 20171128 |