CN104374653B - Test equipment for testing shearing strength between ice and asphalt pavement by using centrifugal force - Google Patents
Test equipment for testing shearing strength between ice and asphalt pavement by using centrifugal force Download PDFInfo
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- CN104374653B CN104374653B CN201410685311.6A CN201410685311A CN104374653B CN 104374653 B CN104374653 B CN 104374653B CN 201410685311 A CN201410685311 A CN 201410685311A CN 104374653 B CN104374653 B CN 104374653B
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- ice
- centrifugal
- centrifugal barrel
- barrel
- centrifugal force
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Abstract
The invention discloses test equipment for testing the shearing strength between ice and an asphalt pavement by using centrifugal force. The test equipment comprises a box body and a centrifugal barrel arranged on the box body, wherein the box body and the centrifugal barrel are communicated with each other through a ventilating isolation mesh and an electric fan which are arranged on a base plate of the centrifugal barrel; a power conveying shaft base, an engine and a refrigerating device are arranged in the box body; the power conveying shaft base is positioned at the center of a base plate in the box body; one end of a power conveying shaft is movably connected with the power conveying shaft base, and the other end of the power conveying shaft penetrates through the base plate of the centrifugal barrel and is connected with the center of a centrifugal rod in the centrifugal barrel; an anti-shearing test piece is arranged at one end of the centrifugal rod, and a balance weight for keeping the centrifugal rod balanced is arranged at the other end of the centrifugal rod; a power conveying shaft gear is arranged on the power conveying shaft; a power output shaft of the engine is externally meshed with the power conveying shaft gear through an engine gear; a plurality of vibration sensors connected with a computer are uniformly arranged on the outer wall of the centrifugal barrel. The test equipment is used for testing the shearing strength between a pavement and ice.
Description
Technical field
The present invention relates to a kind of testing equipment is and in particular to a kind of utilize centrifugal force test ice anti-shearing with bituminous paving strong
The testing equipment of degree.
Background technology
Road snow mantle freezes to the road is clear and traffic safety causes serious harmful effect, produces great life and warp
Ji property loss.This is to greatly reduce coefficient of road adhesion because the accumulated snow on road surface freezes, and significantly reduces the logical of road
Row ability, and notable lengthened automobile skidding braking distance, or even make brake failure, direction out of control, it is easy to directly or indirectly
Cause vehicle accident.
In recent years, the progress that various countries press down ice road surface to snow melt is almost maked rapid progress, and successively develops multiple snow removingizations
The material of ice and technology, such as remove to active storage salt form compound from artificial, mechanical removal method, the spreading Snow Agent of simple passive
Ice and snow technology, energy transformant deicing technology and building for anti-freezing technology, above-mentioned active deicing technology all has preferably
Snow melt suppression ice effect be progressively promoted use.But no matter adopted which kind of deicing method, particularly larger in snowfall
Or when ice sheet accumulation is thicker, the mechanism of action that snow melt presses down ice road surface is to weaken the boundary strength between ice and snow layer and road surface,
Consequently facilitating the later stage is artificial or mechanical deicing avenges.During snow removing, the ice and snow layer being bonded on road surface mainly passes through shearing force
Effect depart from road surface, the shear strength therefore how tested and evaluate between ice and road surface be evaluate pavement snow melting suppression ice
The key point of the excellent summary of energy.However, in the middle of existing technology and equipment, reporting and set for the drawing instrument testing adhesion strength
Standby, as described above, ice and snow layer mainly departs from road surface by shearing force, therefore measure shear strength equipment between road table and ice and snow
More tally with the actual situation, but still lack this equipment at present.
Evaluating the adhesive property between compound and ice i.e. can be by measuring compound solid and ice sheet solid bonding circle
Horizontal shear force on face is realizing.Water was working fluid before not yet freezing, and with temperature drop, gradually condensed into solid
Ice, and compound is also a solid, so that them is bonded together, bonding is an emphasis in which way, is also one
Difficult point；When being further applied load, how to ensure that the power that it is received is maintained at ice with compound bond level interface direction is also one
Individual emphasis and difficult point.
Content of the invention
The technical problem to be solved in the present invention is to provide one kind using centrifugal force test ice and bituminous paving shear strength
Testing equipment, measure anti-shearing slight between ice and road surface for quantitative simulation, thus solving ground surface material by shearing stress
Test problem, finally in order to solve the problems, such as engineering evaluate in practice road surface deicing snow complexity.
The present invention adopts the technical scheme that to solve above-mentioned technical problem:
A kind of utilization centrifugal force tests the testing equipment of ice and bituminous paving shear strength, includes casing and is arranged on it
Centrifugal barrel on top cover, the ventilation separation net passing through between the two to be arranged on centrifugation barrel soleplate is connected with electric fan；Wherein, case
It is provided with feed rod base, electromotor and refrigerating plant in vivo, the base plate center that feed rod base is located in casing
Place, one end of feed rod is flexibly connected with feed rod base, its other end through centrifugal barrel base plate and with setting
The center of the centrifugation bar in centrifugal barrel is connected；One end of centrifugation bar is provided with anti-shearing test specimen, and its other end is provided with use
In the counterweight making centrifugation bar keep balance；The power output shaft being provided with feed rod gear engine on feed rod leads to
Cross engine gear and feed rod gear external toothing；It is evenly arranged with the outer wall of centrifugal barrel and some to be connected with computer
Vibration sensor.
The present invention is further improved by: the bottom of casing is provided with casing leg.
The present invention is further improved by: offers the shoulder hole for placing centrifugal barrel on the top cover of casing, centrifugation
The bottom of bucket is stuck in this ladder in the hole.
The present invention is further improved by: the center of centrifugation bar offers centrifugation bar fixing hole, feed rod
The other end passes through centrifugation bar fixing hole and is fixed on the center of centrifugation bar by being centrifuged bar fixed screw.
The present invention is further improved by: centrifugal barrel is column barrel, and the side wall inner surfaces of centrifugal barrel are provided with guarantor
Warm layer and rubber layer.
The present invention is further improved by: it is three-level step-lap laminated between the centrifugation bung of centrifugal barrel and side wall, and
It is provided with sealing thermal insulation rubber ring at the ladder of the second level.
The present invention is further improved by: anti-shearing test specimen includes the ice making disc being connected with one end of centrifugation bar,
The center of ice making disc offers the blind hole for placing ice, and the top of ice making disc is provided with for placing road surface material
The positioning bucket of material cylinder standard specimen, is bonding interface between ground surface material cylinder standard specimen and ice.
The present invention is further improved by: offers disc inwall on the inwall of blind hole of ice making disc center
Screw thread.
The present invention is further improved by: is fillet at the opening of blind hole of ice making disc center.
The present invention is further improved by: is provided with the inwall of positioning bucket for positioning ground surface material cylinder standard
The locating ring of test specimen.
Compared with prior art, the invention has effective effect that:
Present invention achieves the anti-shearing stress test of road surface (solid) and ice (original state is liquid), the present invention's is excellent
Point is: it breaches the limitation of load mode first, applies centrifugal force using centrifugation bar to test object and ensure that survey simultaneously
On examination interface, suffered power is the shearing force of horizontal direction；Next breach existing equipment be only limited to test original state be solid-
Solid pulling force present situation, so that the anti-shearing stress test of road surface (solid) and ice (original state is liquid) is possibly realized；Then exist
The precision aspect of data, this experimental apparatus accurately records turning when test specimen destroys also by the time of vibrating sensor record
Speed, more corresponding destruction shear stress is provided by calculating；Whole experiment process is ensured in the centrifugal barrel of sealing thermal insulation
The accuracy of experimental result and the repeatability of test.
The present invention be mainly solve engineering in practice ice and snow on road surfaces disaster and develop, can be used for test pavement mix with
Shearing resistance shearing stress between ice.
Brief description
Fig. 1 is that the present invention utilizes centrifugal force to test the main sectional view of ice and the testing equipment of bituminous paving shear strength；
Fig. 2 is the top view of Fig. 1；
Fig. 3 be the present invention be centrifuged bar structural representation, wherein, Fig. 3 (a) be centrifugation bar front view, Fig. 3 (b) be from
The top view of core bar；
Fig. 4 is by the test end partial enlarged drawing of centrifugation bar.
In figure: 1 centrifugation bar, the anti-shearing test specimen of 1-1,1-2 counterweight, 2 centrifugal barrels, 2-1 is centrifuged bung, 2-
2 heat-insulation layers and rubber layer, 2-3 sealing thermal insulation rubber ring, 2-4 ventilation separation net and electric fan, 3 feed rods, 3-1
Centrifugation bar fixed screw, 3-2 feed rod gear, 3-3 feed rod base, 4 electromotors, 4-1 electromotor
Gear, 5 refrigerating plants, 6 casings, 6-1 casing leg, 7 vibration sensors, 8 centrifugation bar fixing holes, 9 ice makings
Disc, 9-1 disc inner thread, 9-2 disc fillet, 10 ground surface material cylinder standard specimens, 11 ice,
12 positioning buckets, 12-1 locating ring, y bonding interface.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further details.
Referring to Fig. 1 to Fig. 3, the present invention is a kind of to be set with the test of bituminous paving shear strength using centrifugal force test ice
Standby, including casing 6 with the centrifugal barrel 2 that is arranged on its top cover, between the two by the ventilation that is arranged on centrifugal barrel 2 base plate every
Off-network is connected with electric fan 2-4, by fan, the air after cooling down is blown into centrifugal barrel 2, forms the cold of circulation in centrifugal barrel 2
Wind, to ensure the uniformity of temperature；Wherein, it is provided with feed rod base 3-3, electromotor 4 and refrigerating plant 5 in casing 6,
The base plate center that feed rod base 3-3 is located in casing 6, one end of feed rod 3 and feed rod base 3-3
It is flexibly connected, its other end is passed through the base plate of centrifugal barrel 2 and is connected with the center of the centrifugation bar 1 being arranged in centrifugal barrel 2；From
One end of core bar 1 is provided with anti-shearing test specimen 1-1, and its other end is provided with for making centrifugation bar 1 keep counterweight 1-2 of balance；
Feed rod gear 3-2 is provided with feed rod 3, the power output shaft of electromotor 4 passes through engine gear 4-1 and moves
Power transmits shaft gear 3-2 external toothing, and can be by changing engine gear 4-1 adjustment centrifugation bar 1 maximum (top) speed；Centrifugal barrel 2
Some vibration sensors 7 being connected with computer are evenly arranged with outer wall.
Further, referring to Fig. 1, the bottom of casing 6 is provided with casing leg 6-1.Offer on the top cover of casing 6 for
Place the shoulder hole of centrifugal barrel 2, the bottom of centrifugal barrel 2 is stuck in this ladder in the hole.
Referring to Fig. 1 and Fig. 3, the center being centrifuged bar 1 offers centrifugation bar fixing hole 8, and the other end of feed rod 3 is worn
Cross centrifugation bar fixing hole 8 and be fixed on the center of centrifugation bar 1 by being centrifuged bar fixed screw 3-1.Centrifugal barrel 2 is cylinder
Bucket, the side wall inner surfaces of centrifugal barrel 2 are provided with heat-insulation layer and rubber layer 2-2, alleviate anti-shearing test specimen 1-1 pair during failure by shear
The excessive impact of centrifugal barrel 2 inwall, to ensure the accuracy of test data in experimentation, and makes in test phase centrifugal barrel 2
The temperature in portion is relatively stable；It is three-level step-lap laminated between the centrifugation bung 2-1 of centrifugal barrel 2 and side wall, and in second level ladder
Place is provided with sealing thermal insulation rubber ring 2-3.
Further, referring to Fig. 4, anti-shearing test specimen 1-1 includes the ice making disc 9 being connected with one end of centrifugation bar 1, system
The center of ice disc 9 offers the blind hole for placing ice 11, and the top of ice making disc 9 is provided with for placing road surface
The positioning bucket 12 of material cylinder standard specimen 10, is bonding interface y between ground surface material cylinder standard specimen 10 and ice 11.
Disc inner thread 9-1 is offered on the inwall of blind hole of ice making disc 9 center, to ensure ice 11 and ice making disc
It is fillet at tight bond between 9, and the opening of blind hole of ice making disc 9 center so that ice making disc 9 and road surface material
Material cylinder standard specimen 10 contact surface smooth excessiveness, is brought to bonding in the stress concentration at most advanced and sophisticated position during water freezing with reducing
The intensity infringement at interface.Additionally, being provided with the inwall of positioning bucket 12 for positioning ground surface material cylinder standard specimen 10
Locating ring 12-1, is acted on ground surface material cylinder standard specimen by the socket position and the hoop of locating ring 12-1 of positioning bucket 12
10 are positioned ice making disc 9 overcentre position.
In order to further appreciate that to the present invention, now an explanation is done to its work process.
Step one, by ground surface material, method is shaped to ground surface material cylinder standard specimen 10 (Marshall tries according to the rules
Part) simulated roadway, pure water is injected in ice making disc 9；
Step 2, ground surface material cylinder standard specimen 10 (marshal piece) is placed in by ice making disk by positioning bucket 12
The top of body 9 center, and make the lower surface of ground surface material cylinder standard specimen 10 (marshal piece) and the water surface proper
Good contact；
Step 3, the whole centrifugation bar 1 completing step 2 is arranged in centrifugal barrel 2, closing centrifugal barrel is (with being centrifuged bung
And seal with elastometic washer) and then by refrigerating plant 5, whole device is lowered the temperature, by temperature control in preset temperature, passing through
Water fully charge Cheng Bing in setting time rear disk body, the now ice 11 in disk body and ground surface material standard cylinder test specimen
10 (marshal pieces) are fully bonded together；
Step 4, complete step 3 after, when the temperature in centrifugal barrel 2 being adjusted to test temperature and keep certain
Between, by controlling the angular acceleration of electromotor 4 come controlled loading speed, persistently load up to ground surface material standard cylinder test specimen
Interfacial failure between 10 and ice face, now ground surface material standard cylinder test specimen 10 (marshal piece) disengaging；
Step 5, the test specimen time to rupture collected by the vibration sensor on centrifugal barrel 2 and stable angular accelerometer
Calculate centrifugal force when ice sheet is departed from ground surface material standard cylinder test specimen 10 (marshal piece), in conjunction with interfacial failure etc.
Shearing strength between level Comprehensive Assessment ground surface material standard cylinder test specimen 10 and ice sheet；The limit destroyed in loading procedure
Shear stress is exactly the centrifugal force and section face when ice sheet is departed from ground surface material standard cylinder test specimen 10 (marshal piece)
Ratio between long-pending；When destruction interface now is ground surface material standard cylinder test specimen 10 and ice face destruction therebetween
Destruction interface；Destroy interface grade be divided into excellent, good, in, secondary and poor, as shown in table 1 below:
And, destruction interface ranking score is higher, and interface when illustrative material is destroyed with ice is more complete.
Claims (7)
1. a kind of utilization centrifugal force test ice and bituminous paving shear strength testing equipment it is characterised in that: include casing
(6) and the centrifugal barrel (2) that is arranged on its top cover, between the two by being arranged on the ventilation separation net on centrifugal barrel (2) base plate
It is connected with electric fan (2 4)；Wherein, it is provided with feed rod base (3 3), electromotor (4) and refrigerating plant in casing (6)
(5) the base plate center that, feed rod base (3 3) is located in casing (6), one end of feed rod (3) is passed with power
Send axle base (3 3) be flexibly connected, its other end pass through centrifugal barrel (2) base plate and with the centrifugation being arranged in centrifugal barrel (2)
The center of bar (1) is connected；Centrifugation bar (1) one end be provided with anti-shearing test specimen (1 1), its other end be provided with for make from
Core bar (1) keeps the counterweight (1 2) of balance；Feed rod gear (3 2), electromotor (4) are provided with feed rod (3)
Power output shaft pass through engine gear (4 1) and feed rod gear (3 2) external toothing；On the outer wall of centrifugal barrel (2)
It is evenly arranged with some vibration sensors (7) being connected with computer；
Anti-shearing test specimen (1 1) includes the ice making disc (9) being connected with one end of centrifugation bar (1), in ice making disc (9)
The blind hole for placing ice (11) is offered, the top of ice making disc (9) is provided with for placing ground surface material cylinder at the heart
The positioning bucket (12) of body standard specimen (10), is bonding interface between ground surface material cylinder standard specimen (10) and ice (11)
(y)；
Disc inner thread (9 1) is offered on the inwall of blind hole of ice making disc (9) center；
Locating ring (12 1) for positioning ground surface material cylinder standard specimen (10) is provided with the inwall of positioning bucket (12).
2. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: the bottom of casing (6) is provided with casing leg (6 1).
3. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: the shoulder hole for placing centrifugal barrel (2) is offered on the top cover of casing (6), the bottom of centrifugal barrel (2) is stuck in
This ladder in the hole.
4. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: the center of centrifugation bar (1) offers centrifugation bar fixing hole (8), the other end of feed rod (3) pass through from
Core bar fixing hole (8) is simultaneously fixed on, by being centrifuged bar fixed screw (3 1), the center being centrifuged bar (1).
5. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: centrifugal barrel (2) is column barrel, and the side wall inner surfaces of centrifugal barrel (2) are provided with heat-insulation layer and rubber layer (2
2).
6. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: it is three-level step-lap laminated between the centrifugation bung (2 1) of centrifugal barrel (2) and side wall, and at the ladder of the second level
It is provided with sealing thermal insulation rubber ring (2 3).
7. a kind of utilization centrifugal force according to claim 1 tests the testing equipment of ice and bituminous paving shear strength,
It is characterized in that: it is fillet at the opening of blind hole of ice making disc (9) center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410685311.6A CN104374653B (en) | 2014-11-21 | 2014-11-21 | Test equipment for testing shearing strength between ice and asphalt pavement by using centrifugal force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410685311.6A CN104374653B (en) | 2014-11-21 | 2014-11-21 | Test equipment for testing shearing strength between ice and asphalt pavement by using centrifugal force |
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| Publication Number | Publication Date |
|---|---|
| CN104374653A CN104374653A (en) | 2015-02-25 |
| CN104374653B true CN104374653B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410685311.6A Expired - Fee Related CN104374653B (en) | 2014-11-21 | 2014-11-21 | Test equipment for testing shearing strength between ice and asphalt pavement by using centrifugal force |
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| CN (1) | CN104374653B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870405A (en) * | 2017-12-01 | 2019-06-11 | 洛阳尖端技术研究院 | A kind of ice addisive strength measuring device and measuring method |
| CN108414177A (en) * | 2018-06-20 | 2018-08-17 | 中国工程物理研究院总体工程研究所 | The heavy load high frequency sound electrohydraulic servo oscillation device being operated under high centrifugal field |
| CN112326463B (en) * | 2020-10-27 | 2024-07-05 | 合肥工业大学 | Experimental method for determining optimal temperature for induction heating milling of steel bridge surface |
| CN116136484B (en) * | 2023-03-28 | 2023-10-24 | 东北农业大学 | Mechanism, device and test method for measuring icing bonding strength of airfoil blade |
Citations (3)
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|---|---|---|---|---|
| CN102087204A (en) * | 2010-11-29 | 2011-06-08 | 哈尔滨工业大学 | Test equipment and method for measuring binding power between ice and bituminous pavement |
| CN102297812A (en) * | 2011-05-20 | 2011-12-28 | 长安大学 | Torsional shear test device for asphalt pavement material and structure |
| CN204405455U (en) * | 2014-11-21 | 2015-06-17 | 长安大学 | A kind of testing equipment utilizing centrifugal force to test ice and bituminous pavement shear strength |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4704607B2 (en) * | 2001-05-31 | 2011-06-15 | 独立行政法人北海道開発土木研究所 | Centrifugal loading device |
-
2014
- 2014-11-21 CN CN201410685311.6A patent/CN104374653B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087204A (en) * | 2010-11-29 | 2011-06-08 | 哈尔滨工业大学 | Test equipment and method for measuring binding power between ice and bituminous pavement |
| CN102297812A (en) * | 2011-05-20 | 2011-12-28 | 长安大学 | Torsional shear test device for asphalt pavement material and structure |
| CN204405455U (en) * | 2014-11-21 | 2015-06-17 | 长安大学 | A kind of testing equipment utilizing centrifugal force to test ice and bituminous pavement shear strength |
Non-Patent Citations (1)
| Title |
|---|
| "Research on asphalt concrete pavement deicing technology";Ma Hui等;《Journal of Southeast University》;20140930;第30卷(第3期);第336-342页 * |
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