CN107907438A - A kind of device and method for being used to detecting and evaluating coarse aggregate abrasion and polished performance - Google Patents
A kind of device and method for being used to detecting and evaluating coarse aggregate abrasion and polished performance Download PDFInfo
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- CN107907438A CN107907438A CN201711246469.3A CN201711246469A CN107907438A CN 107907438 A CN107907438 A CN 107907438A CN 201711246469 A CN201711246469 A CN 201711246469A CN 107907438 A CN107907438 A CN 107907438A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/42—Road-making materials
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Abstract
The invention discloses a kind of device and method for being used to detecting and evaluating coarse aggregate abrasion and polished performance, equipment includes base, central processing unit, servomotor and abrasion, polished performance detection components；Further include column, force value sensor, sample pressure regulating mechanism；Servomotor is fixedly installed on base, is controlled by central processing unit；Abrasion, polished performance detection components include coarse plain emery wheel, fine grinding wheel and pure rubber wheel；Column is used to fix force value sensor, and force value sensor is between column and sample pressure regulating mechanism；Sample pressure regulating mechanism includes counterweight, scale pan, ball line slide rail and the supporting column that is slidably connected；The column lower end that is slidably connected is equipped with sample fixing.The present invention carries out wear test using coarse plain emery wheel and fine grinding wheel to sample, polishing test is carried out to coarse aggregate using pure rubber wheel, test process is accurate and time saving and energy saving.
Description
Technical field
The present invention relates to the abrasion of highway pavement coarse aggregate and polished performance technical field, more particularly to it is a kind of be used to detect and
Evaluate the device and method of coarse aggregate abrasion and polished performance.
Background technology
At present, polishability, is the index for reflecting building stones resistance tire burnishing action ability, and polishability of gathering materials is to determine certain
Can gather materials be used for the critical index of Anti-skid ＆ Wearable Layout on Asphalt Pavement.With the building stones paved roads road crust of high polishing value,
The anti-slide performance of road table, support vehicles safety traffic can be improved.Wearing valve is to determine the ability of building stones resistance surface abrasion, fits
For resistance wheel wear value of gathering materials used in road pavement Friction Surface.
After long-term Vehicle Load is subjected to, the asphalt membrane for being wrapped in surface of aggregate is gradually ground bituminous paving superficial layer
Fall, gather materials and gradually expose, road surface relies primarily on the skid resistance for offer of gathering materials at this time.Therefore under the action of tire, not only
It is required that gathering materials has higher attrition resistance, and require higher wear-resistant photosensitiveness.But the polishing that China uses at present
It is worth test method, in itself there are certain human factor from material to test method, so as to result in bituminous paving antiskid table
Layer coarse aggregate polishing is worth the uncertainty of this important indicator, becomes soft at one during China's asphalt pavement of highway is built
Rib.
The abrasion loss of coarse aggregate is the important indicator of performance of gathering materials, and especially asphalt and basic unit gathers materials,
It is closely related with rutting resistance, wearability, the durability of bituminous paving, and general abrasion loss is small to gather materials, and gather materials outline,
Wear-resisting, durability is good.Soft grain in aggregate is more, the serious building stones of weathering pass through abrasion test, crushes seriously, this index is difficult
Pass through.Therefore abrasion test is also an important means of preferred building stones.
Current specifications JTG E42-2005《Highway engineering is gathered materials testing regulations》In on polishing value of gathering materials detection not only
Test procedure complexity is loaded down with trivial details, test period length, and tests process and cause the factor of error also relatively more, often causes polishing to be worth
Determination data deviation is excessive, is less susceptible grasp during road is detected with coarse aggregate, and the detection project to easily go wrong, its deficiency
Part is mainly summarized as following 4 aspect：
(1) error is caused by the factor of polishing test specimen：Polish the mill that test specimen production technique is uneven, and different personnel make
Light test specimen is there are surface smoothness disunity, and gap size of gathering materials disunity, there is binding material squeeze-out phenomenon etc. in the gap that gathers materials.
(2) coarse aggregate polished performance error is caused by polished performance test method：In terms of specifically including following four：The
One：The polished performance of generally use pendulum value method of testing test polishing test specimen, test process are difficult to control, are affected by human factors tight
Weight, test procedure is more, and process is cumbersome, and time-consuming.Second：Test specimen bears long lasting for continuous vibration, squeezes in test process
Pressure, phenomena such as easily falling grain, be broken.3rd：Pendulum value method of testing detection speed is slow, and can only characterize under low speed (0~
Friction coefficient 10km/h), the friction coefficient produced with actual high speed traveling are not inconsistent.4th：Polishing surface of test piece is arc,
It is cambered surface friction when rubbing with portable pendulum tester sheet rubber, and the pressure value between the sheet rubber of portable pendulum tester and test block is a dynamic change
Value, and in road running, planar friction state during automobile brake between road surface is even more important, therefore, road surface polishability
In the test of energy, the friction coefficient error characterized in pendulum value method of testing is larger, it is desirable to be able to characterizes the friction of planar friction state
Coefficient.
(3) coarse aggregate wear hardness error is caused by wear test method：The detection of abrasion test of gathering materials uses Lip river China fir more
Rock abrasion loss is tested, which makes sample that damaged destruction, its test mode and reality occur using the test method of external impacts
The use environment otherness that border road surface gathers materials is too big, therefore the assessment method also needs further to be combined with practical service environment.
(4) existing assessment method Shortcomings：The abrasivity and polishability gathered materials are distinguished in existing technical standard
Give regulation and evaluation method, but a kind of on the one hand superior performance and on the other hand its evaluation knot of the bad material of performance
Fruit will produce contradiction and difference.
The content of the invention
The object of the present invention is to provide it is a kind of be used for detect and evaluate coarse aggregate abrasion and polished performance device and method,
It can realize coarse aggregate abrasion and the quick detection of polished performance, and test process and actual use process are closer, evaluation
Accuracy higher, and the wear-resistant optical property of coarse aggregate and attrition resistance will can be subjected to unification.
The technical solution adopted by the present invention is：
A kind of equipment for being used to detecting and evaluating coarse aggregate abrasion and polished performance, including base, central processing unit, servo
Motor and abrasion, polished performance detection components；Further include column, force value sensor, sample pressure regulating mechanism；The base
In be provided with servomotor installation storehouse, servomotor be fixedly installed on servomotor installation storehouse in, the input terminal of servomotor is consolidated
Surely the output terminal of central processing unit is connected；The abrasion, polished performance detection components include coarse plain emery wheel, fine grinding wheel and pure rubber
Wheel；When being roughly ground to sample, coarse plain emery wheel is centrally through transmission axis connection servomotor output terminal；When to sample progress fine grinding
When, fine grinding wheel is centrally through transmission axis connection servomotor output terminal；When carrying out polished performance detection to sample, pure rubber wheel
Centrally through transmission axis connection servomotor output terminal；
The uprights vertical is fixedly connected in base upper surface, and with base upper surface, and the force value sensor is put down
Row is in base upper bottom surface, and one end of force value sensor is fixedly connected with the side wall of column；The sample pressure regulating mechanism
Including counterweight, scale pan, ball line slide rail and with the matched column that is slidably connected of ball line slide rail；The ball straight line is slided
Rail fixes company perpendicular to base upper surface above abrasion, polished performance detection components, and with the other end of force value sensor
Connect；The column that is slidably connected passes through ball line slide rail, and the upper surface for the column that is slidably connected is fixed with scale pan lower face and connected
Connect, the column that is slidably connected is that lower face offers sample fixing, offers pin hole on the cell wall of sample fixing, and by with pin
Sample is fixed in sample fixing by the matched pin in hole, and sample lower face and coarse plain emery wheel, fine grinding wheel or pure rubber wheel
Upper surface is in contact.
The equipment for being used to detect and evaluate coarse aggregate abrasion and polished performance, further includes water spraying mechanism, described
Water spraying mechanism includes nozzle, self priming pump and water storage device, and the nozzle connects water storage device by self priming pump, and nozzle is set
Above sample fixing side.
The equipment for being used to detect and evaluate coarse aggregate abrasion and polished performance, the nozzle is duckbilled nozzle,
And the quantity of the duckbilled nozzle is multiple, the specification of multiple duckbilled nozzles is different.
The equipment for being used to detect and evaluate coarse aggregate abrasion and polished performance, the coarse plain emery wheel is corundum sand
Wheel, the fine grinding wheel is green silicon carbide emery wheel.
The sample fixing is square indentations.
A kind of method for being used to detecting and evaluating coarse aggregate abrasion and polished performance, comprises the following steps：
1) the cuboid sample of coarse aggregate is prepared：Coarse aggregate sample is chosen, the side of coarse aggregate sample is polished flat, is made
The coarse aggregate sample becomes cuboid sample；
2) wear hardness test is carried out to cuboid sample：
a1：Dried after cuboid sample is cleaned, weigh cuboid sample mass m1；
a2：Cuboid sample is fitted into sample fixing, sample fixing is stretched out in cuboid sample lower face, and pin is worn
Cross pin hole cuboid sample is fixed in sample fixing；
a3：The output shaft of servomotor is fixedly connected with coarse plain emery wheel center, cuboid sample by staff by transmission shaft
Lower face and coarse plain emery wheel upper surface outside edge contacts, sample is roughly ground；Staff sets slightly in central processing unit
Emery wheel rotation duration t1, duration t1For definite value；Central processing unit control servomotor starts, central controller controls water spraying mechanism
Start, and central controller controls servomotor is in t1After stop, central controller controls water spraying mechanism is in t1After stop, and will
Coarse plain emery wheel is removed；
a4：Transmission shaft in step a3 is fixedly connected with fine grinding wheel center by staff, the lower face of cuboid sample with
Fine grinding wheel upper surface outside edge contacts, fine grinding is carried out to sample；When staff sets fine grinding wheel rotation in central processing unit
Long t2, duration t2For definite value；Central processing unit control servomotor starts, and central controller controls water spraying mechanism starts, and center
Controller controls servomotor in t2After stop, central controller controls water spraying mechanism is in t2After stop, and fine grinding wheel being removed；
So far, the polishing sample of qualification is obtained；
a5：Cuboid sample is removed, that is, polishes sample, the quality m of polishing sample is weighed after drying2；
a6：Wearing valve Q is obtained according to formula (1), wearing valve Q characterizes the wear hardness of coarse aggregate：
Q is bigger, then illustrates that the wear hardness of coarse aggregate is poorer, and coarse aggregate is more intolerant to abrasion；
Q is smaller, then illustrates that the wear hardness of coarse aggregate is better, coarse aggregate is more wear-resistant；
3) polishability test is carried out to the polishing sample in step a4：
S1：Polishing sample is fitted into sample fixing, sample fixing is stretched out in polishing sample lower face, and pin passes through pin
Hole is fixed on sample is polished in sample fixing；Transmission shaft in step a4 is fixedly connected with pure rubber wheel center, polishing examination
The lower face of sample and pure rubber wheel upper surface outside edge contacts；
S2：The quantitative counterweight added in the scale pan of sample pressure regulating mechanism, according to the quality of counterweight, obtains pure
Divide vertical pressure N between rubber wheel and polishing sample1, divide vertical pressure N1For definite value；According to sample pressure regulating mechanism in itself
Quality, obtain pure rubber wheel and polish sample between divide vertical pressure N2, divide vertical pressure N1+ divide vertical pressure N2, obtain
Vertical pressure N between pure rubber wheel and polishing sample；
S3：Central processing unit control servomotor starts, between force value sensor collection polishing sample and pure rubber wheel
First level frictional force F corresponding with vertical pressure N, and first level frictional force F is transmitted in central processing unit；
S4：First polishing value P, the first polishing value P is obtained according to formula (2) and characterizes the polished performance of coarse aggregate：
P is bigger, then illustrates that the polished performance of coarse aggregate is better, coarse aggregate is more anti-skidding；
P is smaller, then illustrates that the polished performance of coarse aggregate is poorer, and coarse aggregate is got over not anti-skidding；
4) according to the wearing valve Q and polishing value P obtained in step 2) and step 3), it is resistance to obtain coarse aggregate using formula (3)
Index M is ground, coarse aggregate abrasion resistance index M characterizes the comprehensive performance of coarse aggregate；
M is smaller, then illustrates that coarse aggregate comprehensive performance is poor；
M is bigger, illustrates that coarse aggregate comprehensive performance is better；
Further, in the S3 step by step of the step 3, when central processing unit control servomotor starts, work people
Member's control water spraying mechanism starts, water spraying mechanism water spray, forms moisture film between pure rubber wheel and polishing sample, force value sensor is adopted
Collection polishes the second horizontal friction force F corresponding with vertical pressure N between sample and pure rubber wheel in the case where there is moisture film1,
And by the second horizontal friction force F1It is transmitted in central processing unit, central processing unit obtains the second polishing value P according to formula (4)1,
Second polishing value P1Characterize polished performance of the coarse aggregate when there is water on surface：
Further, the step 2) and step 3) repeat n times respectively, obtain n son abrasion of cuboid sample
Value Q1、Q2…Qn, polish n the first polishing value P of son of sample1、P2…Pn, n son abrasion of the wearing valve Q equal to cuboid sample
Value Q1、Q2…QnAverage value, the first polishing value P be equal to polishing sample n the first polishing value P of son1、P2…PnAverage value.
The present invention using coarse plain emery wheel and fine grinding wheel to the polishing gathered materials come polishing of the simulating wheel to gathering materials, with collecting in practice
The abrasion process of material uses ring more closely, solving test mode in the abrasion loss experiment of Los Angeles with what actual road surface gathered materials
The problem of border otherness is too big, improves the evaluating precision of abrasion test；Coarse plain emery wheel and fine grinding wheel imitate the bruting process gathered materials
Rate is high, and bruting process is fixed, therefore quality is steady, improves the work efficiency for polishability detection of gathering materials, also solves different people
The problem of polishing test specimen quality that member makes is uneven；
Directly detect horizontal friction force of the rubber wheel when rotating and between gathering materials using force value sensor, and according to vertical plus
Carry inverse and go out the friction coefficient between rubber wheel of gathering materials.Be measured by the way of level rubs sample abrasion loss with it is real
Wheel is consistent with the environment on road surface when braking in the road conditions of border, its test result has more reference value；And solves different people
The human error of member's operation portable pendulum tester, equipment detection data stabilization, automation mechanized operation is time saving and energy saving, has good economic effect
Beneficial and wide application prospect.
Brief description of the drawings
Fig. 1 is the device structure schematic diagram for being used to detect and evaluate coarse aggregate abrasion and polished performance of the present invention；
Fig. 2 is the structure diagram of the sample pressure regulating mechanism of the present invention；
Fig. 3 is the method flow diagram for being used to detect and evaluate coarse aggregate abrasion and polished performance of the present invention.
Embodiment
As depicted in figs. 1 and 2, the present invention includes base 1, central processing unit, servomotor 2 and abrasion, polished performance inspection
Survey component 3；Further include column 4, force value sensor 5, sample pressure regulating mechanism；Servomotor is provided with the base 1
Storehouse is installed, servomotor 2 is fixedly installed in servomotor installation storehouse, and the input terminal of servomotor 2 is fixedly connected with central processing
The output terminal of device；The abrasion, polished performance detection components 3 include coarse plain emery wheel, fine grinding wheel and pure rubber wheel；When to sample 10
When being roughly ground, coarse plain emery wheel is centrally through transmission 2 output terminal of axis connection servomotor；When carrying out fine grinding to sample 10, fine sand
Wheel is centrally through transmission 2 output terminal of axis connection servomotor；When carrying out polished performance detection to sample 10, pure rubber wheel center
By being driven 2 output terminal of axis connection servomotor；
The present invention using coarse plain emery wheel and fine grinding wheel to the polishing gathered materials come polishing of the simulating wheel to gathering materials, with collecting in practice
The abrasion process of material uses ring more closely, solving test mode in the abrasion loss experiment of Los Angeles with what actual road surface gathered materials
The problem of border otherness is too big, improves the evaluating precision of abrasion test；Coarse plain emery wheel and fine grinding wheel imitate the bruting process gathered materials
Rate is high, and bruting process is fixed, therefore quality is steady, improves the work efficiency for polishability detection of gathering materials, also solves different people
The problem of polishing test specimen quality that member makes is uneven；
The column 4 is fixedly connected perpendicular to 1 upper surface of base, and with 1 upper surface of base, the force value sensor
5 parallel to 1 upper bottom surface of base, and one end of force value sensor 5 is fixedly connected with the side wall of column 4；The sample pressure tune
Save mechanism include counterweight 6, scale pan 7, ball line slide rail 9 and with the matched column 8 that is slidably connected of ball line slide rail 9；It is described
Ball line slide rail 9 perpendicular to 1 upper surface of base, above abrasion, polished performance detection components 3, and with force value sensing
The other end of device 5 is fixedly connected；The column 8 that is slidably connected passes through ball line slide rail 9, and the upper surface for the column 8 that is slidably connected
It is fixedly connected with 7 lower face of scale pan, the column 8 that is slidably connected is that lower face offers sample fixing, in sample fixing figure not
Show, pin hole is offered on the cell wall of sample fixing, and sample 10 is fixed on by sample by pin 81 matched with pin hole
In fixing groove, and 10 lower face of sample is in contact with the upper surface of coarse plain emery wheel, fine grinding wheel or pure rubber wheel.
Frictional force very little between ball line slide rail 9 and the column 8 that is slidably connected, in the present invention, ignores.With examination
10 lower face of sample by coarse plain emery wheel or fine sand foot wheel abrasion, can easily transport downwards very much under the action of counterweight 6 by the column 8 that is slidably connected
It is dynamic, ensure in corase grinding, fine grinding and polishing test, 10 lower face of sample and the upper surface of coarse plain emery wheel, fine grinding wheel or pure rubber wheel
All the time it is in contact.
Compared to traditional polished performance test method, pure rubber wheel is driven using motor, it is direct using force value sensor 5
Horizontal friction force of the detection rubber wheel when rotating and between gathering materials, and go out to gather materials between rubber wheel according to vertical loading inverse
Friction coefficient.Wheel and road surface when the polishing experiment of sample 10 is measured by the way of level rubs with braking in actual road conditions
Environment it is consistent, its test result has more reference value；And solve the human error that different personnel operate portable pendulum tester, if
Standby detection data stabilization, automation mechanized operation is time saving and energy saving, application prospect with good economic efficiency and wide.
The equipment for being used to detect and evaluate coarse aggregate abrasion and polished performance, further includes water spraying mechanism, described
Water spraying mechanism includes nozzle 11, self priming pump 12 and water storage device 13, and the nozzle 11 connects water storage device by self priming pump 12
13, and nozzle 11 is arranged above sample fixing side.
The both sides that is provided with of water spraying mechanism acts on, and first, aggregate sample 10 is ground in coarse plain emery wheel or fine grinding wheel
Time-consuming, the water spray powder that prevents from gathering materials is flown upward, and reduces the heat for the generation that rubs between sample 101 and coarse plain emery wheel or fine grinding wheel；The
Two, spray water when rubber wheel rotates, moisture film, wheel and road surface in the driving of simulation rainy day are formed between pure rubber wheel and sample 10
Friction coefficient.
The nozzle 11 is duckbilled nozzle 11, and the quantity of the duckbilled nozzle 11 is multiple, multiple duckbilled nozzles
11 specification is different.Staff selects the duckbilled nozzle 11 of appropriate size and replaces manually according to actual conditions.
The coarse plain emery wheel is Brown Alundum emery wheel, and the fine grinding wheel is green silicon carbide emery wheel.Use Brown Alundum emery wheel pair
Test specimen is roughly ground, and fine grinding is carried out to test specimen using green silicon carbide emery wheel.
The sample fixing is square indentations.In the fixation procedure of sample 10, the shape of sample 10 needs and sample
The form fit of fixing groove, the making of cuboid sample 10 are simple, therefore sample fixing is arranged to square indentations.
As shown in figure 3, a kind of method for being used to detecting and evaluating coarse aggregate abrasion and polished performance, comprises the following steps：
1) the cuboid sample 10 of coarse aggregate is prepared：Coarse aggregate sample is chosen, the side of coarse aggregate sample is polished flat,
The coarse aggregate sample is set to become cuboid sample 10；
2) wear hardness test is carried out to cuboid sample 10：
a1：Dried after cuboid sample 10 is cleaned, weigh 10 mass m of cuboid sample1；
a2：Cuboid sample 10 is fitted into sample fixing, sample fixing, pin are stretched out in 10 lower face of cuboid sample
Cuboid sample 10 is fixed in sample fixing by nail 81 through pin hole；
a3：The output shaft of servomotor is fixedly connected with coarse plain emery wheel center, cuboid sample by staff by transmission shaft
Lower face and coarse plain emery wheel upper surface outside edge contacts, sample is roughly ground；Staff sets slightly in central processing unit
Emery wheel rotation duration t1, duration t1For definite value；Central processing unit control servomotor starts, central controller controls water spraying mechanism
Start, and central controller controls servomotor is in t1After stop, central controller controls water spraying mechanism is in t1After stop, and will
Coarse plain emery wheel is removed；
a4：Transmission shaft in step a3 is fixedly connected with fine grinding wheel center by staff, the lower face of cuboid sample with
Fine grinding wheel upper surface outside edge contacts, fine grinding is carried out to sample；When staff sets fine grinding wheel rotation in central processing unit
Long t2, duration t2For definite value；Central processing unit control servomotor starts, and central controller controls water spraying mechanism starts, and center
Controller controls servomotor in t2After stop, central controller controls water spraying mechanism is in t2After stop, and fine grinding wheel being removed；
So far, the polishing sample of qualification is obtained；
a5：Cuboid sample 10 is removed, that is, polishes sample 10, the quality m of polishing sample 10 is weighed after drying2；
a6：Wearing valve Q is obtained according to formula (1), wearing valve Q characterizes the wear hardness of coarse aggregate：
Q is bigger, then illustrates that the wear hardness of coarse aggregate is poorer, and coarse aggregate is more intolerant to abrasion；
Q is smaller, then illustrates that the wear hardness of coarse aggregate is better, coarse aggregate is more wear-resistant；
In step 2), when the sample of different coarse aggregates carries out wear hardness test, control variate method need to be used, i.e.
Duration t1With duration t2For definite value, motor speed is definite value, the quality m of cuboid sample 101It is equal.Duration t1With duration t2By work
Make personnel rule of thumb to set：Duration t1It need to ensure that 10 lower face Micro texture of cuboid sample polishes completely, be ground with lower face
Damage depth 3mm-6mm is advisable, and determines corase grinding time t1；10 lower face wearing depth of duration t2 cuboids sample loses 1-2mm and is
Preferably；
3) polishability test is carried out to the polishing sample 10 in step a4：
S1：Polishing sample 10 is fitted into sample fixing, sample fixing, pin 81 are stretched out in 10 lower face of polishing sample
It is fixed on through pin hole by sample 10 is polished in sample fixing；Transmission shaft in step a4 is fixedly connected in pure rubber wheel
The heart, polishes lower face and the pure rubber wheel upper surface outside edge contacts of sample 10；
S2：The quantitative counterweight 6 added in the scale pan 7 of sample pressure regulating mechanism, according to the quality of counterweight 6, obtains
Divide vertical pressure N between pure rubber wheel and polishing sample 101, divide vertical pressure N1For definite value；Machine is adjusted according to sample pressure
The quality of structure in itself, obtains dividing vertical pressure N between pure rubber wheel and polishing sample 102, divide vertical pressure N1+ point vertical pressure
Power N2, obtain pure rubber wheel and polish the vertical pressure N between sample 10；In this step, control variable need to equally be used
Method, therefore, when different samples 10 carries out polishing test, motor speed keeps equal, and vertical pressure N is also required to keep phase
Deng；The tire for providing load-carrying vehicle according to standard should control within 0.7MPa the pressure on ground, consider emery wheel itself
The influence of load-bearing, vertical pressure N need to be controlled within 20N.
S3：Central processing unit control servomotor 2 starts, the collection polishing of force value sensor 5 sample 10 and pure rubber wheel it
Between first level frictional force F corresponding with vertical pressure N, and first level frictional force F is transmitted in central processing unit；
S4：First polishing value P, the first polishing value P is obtained according to formula (2) and characterizes the polished performance of coarse aggregate：
P is bigger, then illustrates that the polished performance of coarse aggregate is better, coarse aggregate is more anti-skidding；
P is smaller, then illustrates that the polished performance of coarse aggregate is poorer, and coarse aggregate is got over not anti-skidding；
4) according to the wearing valve Q and the first polishing value P obtained in step 2) and step 3), rough set is obtained using formula (3)
Expect that abrasion resistance index M, coarse aggregate abrasion resistance index M characterize the comprehensive performance of coarse aggregate；
In the field of coarse aggregate, wearing valve Q and the first polishing value P are proportionate under normal conditions, i.e. wearing valve Q
Smaller, coarse aggregate is more wear-resistant, and the first polishing value P is bigger, and coarse aggregate is more anti-skidding, is generally not in this wearing valve Q of glass
Greatly material minimum the first polishing value P.
Therefore, it is substantial in coarse aggregate abrasion resistance index M, the comprehensive performance of coarse aggregate is further characterized, i.e. coarse aggregate is resistance to
It is smaller to grind index M, illustrates that coarse aggregate comprehensive performance is poor, coarse aggregate abrasion resistance index M is bigger, illustrates that coarse aggregate comprehensive performance is better；
To further illustrate the implication of coarse aggregate abrasion resistance index M, it is assumed that the wearing valve Q of the first coarse aggregate and the second coarse aggregate
It is equal, then when the first coarse aggregate abrasion resistance index M is less than the second coarse aggregate abrasion resistance index M, then illustrate the first mill of the first coarse aggregate
Light value P is less than the first polishing value P of the second coarse aggregate, the good combination property of the second coarse aggregate；
Assuming that the first polishing value P of the first coarse aggregate and the second coarse aggregate is equal, then the first coarse aggregate abrasion resistance index M is less than
During the second coarse aggregate abrasion resistance index M, then illustrate that the wearing valve Q of the first coarse aggregate is more than the first polishing value P of the second coarse aggregate, the
The good combination property of two coarse aggregates.
The method for being used to detect and evaluate coarse aggregate abrasion and polished performance, the S3 step by step of the step 3
In, when central processing unit control servomotor 2 starts, staff controls water spraying mechanism to start, water spraying mechanism water spray, in pure rubber
Moisture film is formed between rubber tire and polishing sample 10, force value sensor 5 is gathered in the case where there is moisture film, polishing sample 10 and pure rubber
Second horizontal friction force F corresponding with vertical pressure N between rubber tire1, and by the second horizontal friction force F1It is transmitted to central processing
In device, central processing unit obtains the second polishing value P according to formula (4)1, the second polishing value P1When characterization coarse aggregate has water on surface
Polished performance：
The method for being used to detect and evaluate coarse aggregate abrasion and polished performance, it is characterised in that：The step
2) repeated n times respectively with step 3), obtain n sub- wearing valve Q of cuboid sample 101、Q2…Qn, n son of polishing sample 10
First polishing value P1、P2…Pn, n sub- wearing valve Qs of the wearing valve Q equal to cuboid sample 101、Q2…QnAverage value, first
Polishing value P is equal to n the first polishing value P of son of polishing sample 101、P2…PnAverage value.
By way of repeatedly measuring averaged so that the value of wearing valve Q and the first polishing value P are more accurate, into
One step improves the accuracy for being used for detecting and evaluate the method for coarse aggregate abrasion and polished performance in the present invention.
Claims (8)
- A kind of 1. equipment for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that：Including base, centre Manage device, servomotor and abrasion, polished performance detection components；Further include column, force value sensor, sample pressure regulating mechanism； Servomotor installation storehouse is provided with the base, servomotor is fixedly installed in servomotor installation storehouse, servomotor Input terminal be fixedly connected with the output terminal of central processing unit；The abrasion, polished performance detection components include coarse plain emery wheel, fine sand Wheel and pure rubber wheel；When being roughly ground to sample, coarse plain emery wheel is centrally through transmission axis connection servomotor output terminal；When to examination When sample carries out fine grinding, fine grinding wheel is centrally through transmission axis connection servomotor output terminal；When to sample progress polished performance detection When, pure rubber wheel is centrally through transmission axis connection servomotor output terminal；The uprights vertical is fixedly connected in base upper surface, and with base upper surface, the force value sensor parallel in Base upper bottom surface, and one end of force value sensor is fixedly connected with the side wall of column；The sample pressure regulating mechanism includes Counterweight, scale pan, ball line slide rail and with the matched column that is slidably connected of ball line slide rail；The ball line slide rail hangs down Directly in base upper surface, above abrasion, polished performance detection components, and it is fixedly connected with the other end of force value sensor； The column that is slidably connected passes through ball line slide rail, and the upper surface for the column that is slidably connected is fixedly connected with scale pan lower face, The column that is slidably connected is that lower face offers sample fixing, offers pin hole on the cell wall of sample fixing, and by with pin hole Sample is fixed in sample fixing by matched pin, and sample lower face and coarse plain emery wheel, fine grinding wheel or pure rubber wheel is upper End face is in contact.
- 2. the equipment according to claim 1 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： Water spraying mechanism is further included, the water spraying mechanism includes nozzle, self priming pump and water storage device, and the nozzle is connected by self priming pump Water storage device is connect, and nozzle is arranged above sample fixing side.
- 3. the equipment according to claim 2 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： The nozzle is duckbilled nozzle, and the quantity of the duckbilled nozzle is multiple, and the specification of multiple duckbilled nozzles is different.
- 4. the equipment according to claim 1 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： The coarse plain emery wheel is Brown Alundum emery wheel, and the fine grinding wheel is green silicon carbide emery wheel.
- 5. the equipment according to claim 1 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： The sample fixing is square indentations.
- A kind of 6. method for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that：Comprise the following steps：1) the cuboid sample of coarse aggregate is prepared：Coarse aggregate sample is chosen, the side of coarse aggregate sample is polished flat, is made described Coarse aggregate sample become cuboid sample；2) wear hardness test is carried out to cuboid sample：a1：Dried after cuboid sample is cleaned, weigh cuboid sample mass m1；a2：Cuboid sample is fitted into sample fixing, sample fixing is stretched out in cuboid sample lower face, and pin passes through pin Cuboid sample is fixed in sample fixing by hole；a3：The output shaft of servomotor is fixedly connected with coarse plain emery wheel center by staff by transmission shaft, under cuboid sample End face and coarse plain emery wheel upper surface outside edge contacts, roughly grind sample；Staff sets coarse plain emery wheel in central processing unit Rotate duration t1, duration t1For definite value；Central processing unit control servomotor starts, and central controller controls water spraying mechanism starts, And central controller controls servomotor is in t1After stop, central controller controls water spraying mechanism is in t1After stop, and by coarse plain emery wheel Remove；a4：Transmission shaft in step a3 is fixedly connected with fine grinding wheel center, the lower face of cuboid sample and fine sand by staff Upper surface outside edge contacts are taken turns, fine grinding is carried out to sample；Staff sets fine grinding wheel rotation duration t in central processing unit2, Duration t2For definite value；Central processing unit control servomotor starts, and central controller controls water spraying mechanism starts, and center control Device controls servomotor in t2After stop, central controller controls water spraying mechanism is in t2After stop, and fine grinding wheel being removed；So far, Obtain the polishing sample of qualification；a5：Cuboid sample is removed, that is, polishes sample, the quality m of polishing sample is weighed after drying2；a6：Wearing valve Q is obtained according to formula (1), wearing valve Q characterizes the wear hardness of coarse aggregate：Q is bigger, then illustrates that the wear hardness of coarse aggregate is poorer, and coarse aggregate is more intolerant to abrasion；Q is smaller, then illustrates that the wear hardness of coarse aggregate is better, coarse aggregate is more wear-resistant；3) polishability test is carried out to the polishing sample in step a4：S1：Polishing sample is fitted into sample fixing, sample fixing is stretched out in polishing sample lower face, and pin will through pin hole Polishing sample is fixed in sample fixing；Transmission shaft in step a4 is fixedly connected with pure rubber wheel center, polishes sample Lower face and pure rubber wheel upper surface outside edge contacts；S2：The quantitative counterweight added in the scale pan of sample pressure regulating mechanism, according to the quality of counterweight, obtains pure rubber Divide vertical pressure N between wheel and polishing sample1, divide vertical pressure N1For definite value；According to the matter of sample pressure regulating mechanism in itself Amount, obtains dividing vertical pressure N between pure rubber wheel and polishing sample2, divide vertical pressure N1+ divide vertical pressure N2, obtain pure rubber Vertical pressure N between rubber tire and polishing sample；S3：Central processing unit control servomotor starts, between force value sensor collection polishing sample and pure rubber wheel with it is perpendicular It is transmitted to the corresponding first level frictional force F of pressure N, and by first level frictional force F in central processing unit；S4：First polishing value P, the first polishing value P is obtained according to formula (2) and characterizes the polished performance of coarse aggregate：P is bigger, then illustrates that the polished performance of coarse aggregate is better, coarse aggregate is more anti-skidding；P is smaller, then illustrates that the polished performance of coarse aggregate is poorer, and coarse aggregate is got over not anti-skidding；4) according to the wearing valve Q and polishing value P obtained in step 2) and step 3), the wear-resisting finger of coarse aggregate is obtained using formula (3) Number M, coarse aggregate abrasion resistance index M characterize the comprehensive performance of coarse aggregate；M is smaller, then illustrates that coarse aggregate comprehensive performance is poor；M is bigger, illustrates that coarse aggregate comprehensive performance is better.
- 7. the method according to claim 6 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： In the S3 step by step of the step 3, when central processing unit control servomotor starts, staff controls water spraying mechanism to open Dynamic, water spraying mechanism water spray forms moisture film between pure rubber wheel and polishing sample, and the collection of force value sensor is having the situation of moisture film Under, polish the second horizontal friction force F corresponding with vertical pressure N between sample and pure rubber wheel1, and the second level is rubbed Power F1It is transmitted in central processing unit, central processing unit obtains the second polishing value P according to formula (4)1, the second polishing value P1Characterization Polished performance of the coarse aggregate when there is water on surface：
- 8. the method according to claim 6 for being used to detecting and evaluating coarse aggregate abrasion and polished performance, it is characterised in that： The step 2) and step 3) repeat n times respectively, obtain n sub- wearing valve Q of cuboid sample1、Q2…Qn, polish sample N the first polishing value P of son1、P2…Pn, n sub- wearing valve Qs of the wearing valve Q equal to cuboid sample1、Q2…QnAverage value, First polishing value P is equal to n the first polishing value P of son of polishing sample1、P2…PnAverage value.
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