CN106290145A - The bituminous paving friction coefficient tester of a kind of simulated rainfall and method of testing thereof - Google Patents
The bituminous paving friction coefficient tester of a kind of simulated rainfall and method of testing thereof Download PDFInfo
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- CN106290145A CN106290145A CN201610619164.1A CN201610619164A CN106290145A CN 106290145 A CN106290145 A CN 106290145A CN 201610619164 A CN201610619164 A CN 201610619164A CN 106290145 A CN106290145 A CN 106290145A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The present invention relates to bituminous paving friction coefficient tester and the test method of a kind of simulated rainfall.It rain case including being divided into capital equipment district and auxiliary equipment district；Capital equipment district is converged rain base plate and is divided into upper and bottom section, and bottom is divided into collection box；The right half of upper part is provided with the water distributor of band shower nozzle at top；The right half of upper part is provided with two card articles in bottom, places die trial in the middle of two card articles；The upper surface of die trial is provided with portable pendulum tester；Left half is provided with water butt in bottom, the water pump being connected in collection box by water inlet pipe bottom this water butt；Water butt is provided with water pump at top, and this water pump is connected to water distributor by aqueduct；Aqueduct is the most also disposed with threeway, effusion meter and electromagnetic valve；Threeway connects the return pipe being connected to water butt of band regulation valve；Auxiliary equipment district is provided with control chamber.The present invention has simple in construction, feature easy and simple to handle.
Description
Technical field
The invention belongs to bituminous pavement property technical field of measurement and test, it particularly relates to the Colophonium of a kind of simulated rainfall
Friction coefficient tester for pavement and method of testing thereof.
Background technology
Along with expanding economy, road quality classification improves constantly, and the volume of traffic increases, and speed is accelerated, and the antiskid of bituminous paving is asked
Topic becomes increasingly conspicuous, and especially in the rainy day, Bitumen Pavement Anti-Skid Performance is substantially reduced, and easily makes vehicle slip out of control, cause casualties,
The major accidents such as property loss.In order to verify whether Bitumen Pavement Anti-Skid Performance disclosure satisfy that use requirement, we use pendulum-type
Instrument measures surface friction coefficient.But in test process, it is merely able to test the bituminous paving coefficient of friction under the conditions of the non-rainy day,
Different rainfall intensity, the bituminous paving coefficient of frictions of overland flow coefficient under the conditions of can not reflecting the rainy day.
Summary of the invention
For solving above-mentioned technical problem, the invention provides a kind of simple in construction, easy and simple to handle and using effect good
The bituminous paving friction coefficient tester of simulated rainfall and method of testing thereof.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described tester includes being divided into master
Wanting the rain case 1 in battery limits and auxiliary equipment district, capital equipment district is located at the left of rain case 1；Converged rain base plate 15 in capital equipment district
Being divided into upper and bottom section, bottom is divided into collection box 17, and upper part is divided into again left half and right half；Right half is at top
It is provided with the water distributor 2 of band shower nozzle 3；Right half is provided with two card articles 13 in bottom, places die trial 19 in the middle of these two card articles 13；Examination
The upper surface of mould 19 is provided with portable pendulum tester 12；Left half is provided with water butt 10 in bottom, by water inlet pipe 14 bottom this water butt 10
The water pump A16 being connected in collection box 17；Water butt 10 is provided with water pump B11, this water pump B11 and is connected by aqueduct at top
To water distributor 2；Aqueduct is the most also disposed with threeway 9, effusion meter 4 and electromagnetic valve 5；Only surplus one of threeway 9 goes out
Mouth connects the return pipe 8 of band regulation valve 7, and this return pipe 8 is connected to water butt 10；Auxiliary equipment district is provided with control chamber 24.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, sets on the right side of described remittance rain base plate 15
It is equipped with two card articles 13 and some " one " word vacancy section；Described card article 13 is in cuboid.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described die trial 19 includes being trapped among the end
The left side side form 28 of plate 30 4 side, right side side form 29, front side form 26, rear side form 27, and left side baffle plate 20 and right side gear
Plate 21；Described left side side form 28 is parallel with load wheel direction of travel with the length direction of right side side form 29；Described front side form 26
Vertical with load wheel direction of travel with the length direction of rear side form 27；It is provided with at the top surface edge of described left side side form 28
Left groove 22；It is provided with right groove 23 at the top surface edge of described right side side form 29；Described left side baffle plate 20 can hold
It is inserted in left groove 22；Described right-hand apron 21 can be used for regulating PVvalue testing examination with socket joint in right groove 23
The runoff coefficient on part surface；The lower surface of described base plate 30 is the plane of rectangle；The upper surface correspondence molding examination of described base plate 30
The region of part is the arc surface along front side form 26 to rear side form 27.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described die trial 19 is at base plate 30
Corresponding space is irregular body, and the top of described irregular body is long 50cm, wide 50cm, the cuboid of high 5cm, described does not advises
Then the plan view from above of the bottom of body be long 50cm, the square of wide 50cm, the cross-sectional view of the bottom of described irregular body is
The arc surface of chord length 50cm, i.e. can make the bitumen mixture specimen of above-mentioned irregular body.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described control chamber 24 is on panel
It is provided with display screen 33 and input keyboard 34, is internally provided with the controller 25 that electronic circuit board connects.
The bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described electromagnetic valve 5, regulation valve 7,
Water pump B11 and water pump A16 all connects with controller 25.
When being simulated the bituminous paving PVvalue testing of rainfall, the work by water pump B11 of the water in water butt 10
Flow in water distributor 2 with along outlet pipe 6, and be dropped in bitumen mixture specimen surface, rain by shower nozzle 3 simulation formation raindrop
Water from surface of test piece landing to converge rain base plate 15 surface, and along converge rain base plate 15 flow into collection box 17, the water in collection box 17
Water butt 10, the water in supply water butt 10 is flowed into by water pump A16 and water inlet pipe 14；Threeway 9 and regulation valve 7, effusion meter 4 and
The synergism of electromagnetic valve 5 can regulate rainfall intensity；By whether arrange left side baffle plate 20 and right-hand apron in die trial both sides
21 can be with regulated flow coefficient.Under condition of raining, asphalt examination portable pendulum tester 12 being placed in die trial 19 and die trial 19
Part surface, can carry out the bituminous paving PVvalue testing of simulated rainfall.
The test method of the bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described test side
Method concretely comprises the following steps:
1) in die trial 19 both sides of forming test specimen, select to be suitable for left side baffle plate 20 He of height according to runoff coefficient
Right-hand apron 21, inserts left side baffle plate 20 in the left groove 22 of die trial 19, right-hand apron 21 inserts the right side of die trial 19
In groove 23；
2) in water butt 10, add the water of 2/3 volume, collection box 17 adds the water of 2/3 volume, opens effusion meter
4, regulation valve 7, electromagnetic valve 5, water pump A16, water pump B11, regulates rainfall intensity, is then shut off rainer；
3) test specimen is fixed on together with die trial 19 centre of two card articles 13, portable pendulum tester is placed on the measuring point of surface of test piece
On, and make the swaying direction of pendulum with during specimen molding to roll direction consistent；
4) rotate the leveling bolt on portable pendulum tester base, make air level placed in the middle, carry out instrument leveling；
5) loosen pinch grip, rotate lifting handle, make hoisting Gao Bingneng freely swing, then screw pinch grip, will
Pendulum is fixed on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member place parallel with fork, press release
Switch, makes to be flapped toward left drive balancing point and swings, when falling after pendulum reaches extreme higher position, caught by fork with hands, and now pointer should
Nulling, if not nulling, can slightly screw or unscrew the adjusting nut of pendulum；Repeatable operation, until pointer nulling, zeroing allowable error is
± 1, return to zero complete；
6) allow pendulum be in the state of naturally drooping, unclamp fixed handle, rotate lifting handle, make to accommodate fall；Meanwhile, carry
Playing lifting handle, to make to be flapped toward left side mobile, then puts down lifting handle and makes sheet rubber lower edge contact to earth gently, puts slip against sheet rubber
Length gage, makes gage left end be directed at sheet rubber lower edge；Mention lifting handle again to make to be flapped toward right side movement, then put down lifting handle and make
Sheet rubber lower edge contacts to earth gently, checks that sheet rubber lower edge should flush with the right-hand member of sliding length gage；If flushing, then rubber is described
The distance (sliding length) that sheet contacts to earth for twice meets the regulation of 126mm；When checking sliding length, just should connect with rubber length of a film limit
Tactile road surface is as the criterion, and can not borrow the strength forward slip of pendulum, not conform to the actual conditions with the sliding length of non-calibrating；If not flushing, raise
Or reduce pendulum or the height of instrument base；Adjust the height of instrument base with the leveling serew on rotary apparatus base during fine setting
Method is more convenient, but should be noted that holding air level is placed in the middle；Repetitive operation, until sliding length meets the regulation of 126mm；
7) pendulum is fixed on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member puts down with fork
At Hang；
8) open effusion meter 4, regulation valve 7, electromagnetic valve 5, water pump A16, water pump B11, regulate rainfall intensity, treat rainfall one section
After time, after the runoff coefficient of surface of test piece reaches preset value, press the release-push on the cantilever of right side, make pendulum sliding on road surface
Cross；When fork falls after rise, catch, reading but not record.Then fork and pointer is made to be replaced in horizontal release position.
9) repeat step 7) and step 8) operation 5 times, and read to remember the pendulum value every time measured；In 5 values of single point assay
The difference of maxima and minima cannot be greater than 3；During such as difference more than 3, Producing reason should be checked, and again repeat aforementioned respectively
Item operation, to meeting regulation；Take meansigma methods pavement skid resistance value (i.e. pendulum value BPN as single-point of 5 mensuration1), round
Number；
10) in point position road table temperature under temperature measurement note condition of raining, accurately to 1 DEG C；
11) each measuring point is made up of 3 single-points, i.e. needs parallel assay 3 times at same observation station by the above process, with 3 times
The meansigma methods of measurement result is as the representative value (being accurate to 1) of this measuring point；3 single-points all should be positioned at same surface of test piece, single-point
Spacing is 20cm-30cm；The position of measuring point is with the positional representation of middle single-point；
Compared with prior art, the bituminous paving friction coefficient tester of simulated rainfall of the present invention and test method
Have the advantage that
1) the bituminous paving portable pendulum tester simple in construction of the simulated rainfall used, reasonable in design and installation and use operation letter
Just, input cost is relatively low, installs compact, takes up room less；
2) the bituminous paving portable pendulum tester parameter adjustment of the simulated rainfall used is easy, can to rainfall intensity, runoff coefficient,
The parameters such as rainfall duration are adjusted, and are provided with control chamber, control simple, can accurately control raininess degree, runoff coefficient, fall
Rain lasts so that the bituminous paving PVvalue testing process under condition of raining is easily controllable；
3) left groove that the die trial that used both sides parallel with direction of travel are arranged and right groove, can be according to need
Determine the need for fixing left side baffle plate and right-hand apron, and then may be used for controlling the runoff on bitumen mixture specimen surface
Coefficient, for simulating the runoff coefficient situation of actual road surface；
4) using effect is good and practical value high, good looking appearance, facilitates the bituminous paving of simulated rainfall largely
Dynamic rotary type PVvalue testing, and process of the test is easily controllable, has the advantages such as test operation is convenient, control is accurate,
The accuracy of the PVvalue testing result of simulated rainfall can be effectively ensured.
Accompanying drawing explanation
Fig. 1: tester schematic diagram of the present invention；Fig. 2: remittance rain base plate schematic diagram figure；Fig. 3: die trial structure chart；Fig. 4: left
Side shield figure；Fig. 5: right-hand apron figure.1-rain case, 2-water distributor, 3-shower nozzle, 4-effusion meter, 5-electromagnetic valve, 6-outlet pipe, 7-
Regulation valve, 8-return pipe, 9-threeway, 10-water butt, 11-water pump B, 12-portable pendulum tester, 13-card article, 14-water inlet pipe, 15-converge rain
On the left of base plate, 16-water pump A, 17-collection box, 19-die trial, 20-recessed on the right side of baffle plate, 21-right-hand apron, 22-left groove, 23-
On the left of groove, 24-control chamber, 25-controller, 26-front side form, 27-rear side form, 28-on the right side of side form, 29-at the bottom of side form, 30-
Plate, display screen-33, input keyboard-34.
Detailed description of the invention
Below in conjunction with specific embodiment to the bituminous paving friction coefficient tester of simulated rainfall of the present invention and
Test method is described further, but protection scope of the present invention is not limited to this.
Embodiment 1
The bituminous paving friction coefficient tester of a kind of simulated rainfall, described tester includes being divided into capital equipment district and auxiliary
Helping the rain case 1 of battery limits, capital equipment district is located at the left of rain case 1；Capital equipment district is converged rain base plate 15 and is divided into upper part
And lower part, bottom is divided into collection box 17, and upper part is divided into again left half and right half；Right half is provided with band shower nozzle 3 at top
Water distributor 2；Right half is provided with two card articles 13 in bottom, places die trial 19 in the middle of these two card articles 13；The upper table of die trial 19
Face is provided with portable pendulum tester 12；Left half is provided with water butt 10 in bottom, is connected to charge for remittance by water inlet pipe 14 bottom this water butt 10
Water pump A16 in case 17；Water butt 10 is provided with water pump B11, this water pump B11 and is connected to water distributor 2 by aqueduct at top；
Aqueduct is the most also disposed with threeway 9, effusion meter 4 and electromagnetic valve 5；An only surplus outlet of threeway 9 connects band and adjusts
The return pipe 8 of joint valve 7, this return pipe 8 is connected to water butt 10；Auxiliary equipment district is provided with control chamber 24.
Two card articles 13 and some " one " word vacancy section it is provided with on the right side of described remittance rain base plate 15；Described card article 13 is in rectangular
Body.Described die trial 19 includes being trapped among the left side side form 28 of base plate 30 4 side, right side side form 29, front side form 26, rear side form 27,
And left side baffle plate 20 and right-hand apron 21；The length direction of described left side side form 28 and right side side form 29 takes turns walking side with load
To parallel；Described front side form 26 is vertical with load wheel direction of travel with the length direction of rear side form 27；Described left side side form
Left groove 22 it is provided with at the top surface edge of 28；It is provided with right groove at the top surface edge of described right side side form 29
23；Described left side baffle plate 20 can be with socket joint in left groove 22；Described right-hand apron 21 can with socket joint in right groove 23,
For regulating the runoff coefficient of PVvalue testing surface of test piece；The lower surface of described base plate 30 is the plane of rectangle；The described end
The region of the upper surface correspondence shaping test piece of plate 30 is the arc surface along front side form 26 to rear side form 27.Described die trial 19
Space corresponding at base plate 30 is irregular body, the top of described irregular body be long 50cm, wide 50cm, high 5cm rectangular
Body, the plan view from above of the bottom of described irregular body is long 50cm, the square of wide 50cm, the bottom of described irregular body
Cross-sectional view is the arc surface of chord length 50cm, i.e. can make the bitumen mixture specimen of above-mentioned irregular body.Described control chamber
24 are provided with display screen 33 and input keyboard 34 on panel, are being internally provided with the controller 25 that electronic circuit board connects.Institute
State electromagnetic valve 5, regulation valve 7, water pump B11 and water pump A16 all connect with controller 25.It is provided with temperature in described auxiliary equipment district to pass
Sensor and heater；Described connecting shaft is provided with displacement transducer.
When being simulated the bituminous paving PVvalue testing of rainfall, the work by water pump B11 of the water in water butt 10
Flow in water distributor 2 with along outlet pipe 6, and be dropped in bitumen mixture specimen surface, rain by shower nozzle 3 simulation formation raindrop
Water from surface of test piece landing to converge rain base plate 15 surface, and along converge rain base plate 15 flow into collection box 17, the water in collection box 17
Water butt 10, the water in supply water butt 10 is flowed into by water pump A16 and water inlet pipe 14；Threeway 9 and regulation valve 7, effusion meter 4 and
The synergism of electromagnetic valve 5 can regulate rainfall intensity；By whether arrange left side baffle plate 20 and right-hand apron in die trial both sides
21 can be with regulated flow coefficient.Under condition of raining, asphalt examination portable pendulum tester 12 being placed in die trial 19 and die trial 19
Part surface, can carry out the bituminous paving PVvalue testing of simulated rainfall.
The test method of the bituminous paving friction coefficient tester of a kind of simulated rainfall of the present invention, described test side
Method concretely comprises the following steps:
1) in die trial 19 both sides of forming test specimen, select to be suitable for left side baffle plate 20 He of height according to runoff coefficient
Right-hand apron 21, inserts left side baffle plate 20 in the left groove 22 of die trial 19, right-hand apron 21 inserts the right side of die trial 19
In groove 23；
2) in water butt 10, add the water of 2/3 volume, collection box 17 adds the water of 2/3 volume, opens effusion meter
4, regulation valve 7, electromagnetic valve 5, water pump A16, water pump B11, regulates rainfall intensity, is then shut off rainer；
3) test specimen is fixed on together with die trial 19 centre of two card articles 13, portable pendulum tester is placed on the measuring point of surface of test piece
On, and make the swaying direction of pendulum with during specimen molding to roll direction consistent；
4) rotate the leveling bolt on portable pendulum tester base, make air level placed in the middle, carry out instrument leveling；
5) loosen pinch grip, rotate lifting handle, make hoisting Gao Bingneng freely swing, then screw pinch grip, will
Pendulum is fixed on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member place parallel with fork, press release
Switch, makes to be flapped toward left drive balancing point and swings, when falling after pendulum reaches extreme higher position, caught by fork with hands, and now pointer should
Nulling, if not nulling, can slightly screw or unscrew the adjusting nut of pendulum；Repeatable operation, until pointer nulling, zeroing allowable error is
± 1, return to zero complete；
6) allow pendulum be in the state of naturally drooping, unclamp fixed handle, rotate lifting handle, make to accommodate fall；Meanwhile, carry
Playing lifting handle, to make to be flapped toward left side mobile, then puts down lifting handle and makes sheet rubber lower edge contact to earth gently, puts slip against sheet rubber
Length gage, makes gage left end be directed at sheet rubber lower edge；Mention lifting handle again to make to be flapped toward right side movement, then put down lifting handle and make
Sheet rubber lower edge contacts to earth gently, checks that sheet rubber lower edge should flush with the right-hand member of sliding length gage；If flushing, then rubber is described
The distance (sliding length) that sheet contacts to earth for twice meets the regulation of 126mm；When checking sliding length, just should connect with rubber length of a film limit
Tactile road surface is as the criterion, and can not borrow the strength forward slip of pendulum, not conform to the actual conditions with the sliding length of non-calibrating；If not flushing, raise
Or reduce pendulum or the height of instrument base；Adjust the height of instrument base with the leveling serew on rotary apparatus base during fine setting
Method is more convenient, but should be noted that holding air level is placed in the middle；Repetitive operation, until sliding length meets the regulation of 126mm；
7) pendulum is fixed on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member puts down with fork
At Hang；
8) open effusion meter 4, regulation valve 7, electromagnetic valve 5, water pump A16, water pump B11, regulate rainfall intensity, treat rainfall one section
After time, after the runoff coefficient of surface of test piece reaches preset value, press the release-push on the cantilever of right side, make pendulum sliding on road surface
Cross；When fork falls after rise, catch, reading but not record, then make fork and pointer be replaced in horizontal release position；
9) repeat step 7) and step 8) operation 5 times, and read to remember the pendulum value every time measured；In 5 values of single point assay
The difference of maxima and minima cannot be greater than 3；During such as difference more than 3, Producing reason should be checked, and again repeat aforementioned respectively
Item operation, to meeting regulation；Take meansigma methods pavement skid resistance value (i.e. pendulum value BPN as single-point of 5 mensuration1), round
Number；
10) in point position road table temperature under temperature measurement note condition of raining, accurately to 1 DEG C；
11) each measuring point is made up of 3 single-points, i.e. needs parallel assay 3 times at same observation station by the above process, with 3 times
The meansigma methods of measurement result is as the representative value (being accurate to 1 unit) of this measuring point；3 single-points all should be positioned at same test specimen table
Face, single-point spacing is 20cm-30cm；The position of measuring point is with the positional representation of middle single-point.
Claims (7)
1. the bituminous paving friction coefficient tester of a simulated rainfall, it is characterised in that described tester includes being divided into mainly
The rain case (1) in battery limits and auxiliary equipment district, capital equipment district is located at the left of rain case (1)；Converged rain base plate in capital equipment district
(15) being divided into upper and bottom section, bottom is divided into collection box (17), and upper part is divided into again left half and right half；Right half
The water distributor (2) of band shower nozzle (3) it is provided with at top；Right half is provided with two card articles (13) in bottom, in these two card articles (13)
Between place die trial (19)；The upper surface of die trial (19) is provided with portable pendulum tester (12)；Left half is provided with water butt (10), this storage in bottom
The water pump A (16) that bucket (10) bottom is connected in collection box (17) by water inlet pipe (14)；Water butt (10) is provided with at top
Water pump B (11), this water pump B (11) is connected to water distributor (2) by aqueduct；Aqueduct is the most also disposed with threeway
(9), effusion meter (4) and electromagnetic valve (5)；An only surplus outlet of threeway (9) connects the return pipe (8) of band regulation valve (7), should
Return pipe (8) is connected to water butt (10)；Auxiliary equipment district is provided with control chamber (24).
The bituminous paving friction coefficient tester of simulated rainfall the most according to claim 1, it is characterised in that described remittance rain
Base plate (15) right side is provided with two card articles (13) and some " one " word vacancy section；Described card article (13) is in cuboid.
The bituminous paving friction coefficient tester of simulated rainfall the most according to claim 1, it is characterised in that described die trial
(19) include being trapped among the left side side form (28) of base plate (30) four side, right side side form (29), front side form (26), rear side form
, and left side baffle plate (20) and right-hand apron (21) (27)；Described left side side form (28) and the length direction of right side side form (29)
Parallel with load wheel direction of travel；The length direction of described front side form (26) and rear side form (27) takes turns direction of travel with load
Vertically；Left groove (22) it is provided with at the top surface edge in described left side side form (28)；The upper table on described right side side form (29)
Face edge is provided with right groove (23)；Described left side baffle plate (20) can be with socket joint in left groove (22)；Described right side
Baffle plate (21) can be with socket joint in right groove (23), for regulating the runoff coefficient of PVvalue testing surface of test piece；Described
The lower surface of base plate (30) is the plane of rectangle；The region of the upper surface correspondence shaping test piece of described base plate (30) is along front
Side form (26) is to the arc surface of rear side form (27).
The bituminous paving friction coefficient tester of simulated rainfall the most according to claim 3, it is characterised in that described die trial
(19) space corresponding at base plate (30) place is irregular body, and the top of described irregular body is long 50cm, wide 50cm, high 5cm
Cuboid, the plan view from above of the bottom of described irregular body is long 50cm, the square of wide 50cm, described irregular body
The cross-sectional view of bottom is the arc surface of chord length 50cm, i.e. can make the bitumen mixture specimen of above-mentioned irregular body.
The bituminous paving friction coefficient tester of simulated rainfall the most according to claim 3, it is characterised in that described control
Case processed (24) is provided with display screen (33) and input keyboard (34) on panel, is being internally provided with the control that electronic circuit board connects
Device processed (25).
The bituminous paving friction coefficient tester of simulated rainfall the most according to claim 3, it is characterised in that described electromagnetism
Valve (5), regulation valve (7), water pump B (11) and water pump A (16) all connect with controller (25).
The test method of the bituminous paving friction coefficient tester of simulated rainfall the most according to claim 6, its feature exists
In, described test method concretely comprises the following steps:
1) in die trial (19) both sides of forming test specimen, according to runoff coefficient select be suitable for height left side baffle plate (20) and
Right-hand apron (21), inserts left side baffle plate (20) in the left groove (22) of die trial (19), right-hand apron (21) is inserted examination
In the right groove (23) of mould (19)；
2) in water butt (10), add the water of 2/3 volume, collection box (17) also adds the water of 2/3 volume, opens flow
Meter (4), regulation valve (7), electromagnetic valve (5), water pump A (16), water pump B (11), regulate rainfall intensity, be then shut off rainer；
3) test specimen is fixed on together with die trial (19) centre of two card articles (13), portable pendulum tester (12) is placed on surface of test piece
On measuring point, and make the swaying direction of pendulum with during specimen molding to roll direction consistent；
4) rotate the leveling bolt on portable pendulum tester base, make air level placed in the middle, by portable pendulum tester (12) leveling；
5) loosen pinch grip, rotate lifting handle, make hoisting Gao Bingneng freely swing, then screw pinch grip, pendulum is solid
It is scheduled on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member place parallel with fork, press and discharge
Closing, make to be flapped toward left drive balancing point and swing, when falling after pendulum reaches extreme higher position, caught by fork with hands, now pointer should refer to
Zero, if not nulling, can slightly screw or unscrew the adjusting nut of pendulum；Repeatable operation, until pointer nulling, zeroing allowable error is ±
1, portable pendulum tester (12) returns to zero complete；
6) allow pendulum be in the state of naturally drooping, unclamp fixed handle, rotate lifting handle, make to accommodate fall；Meanwhile, act is mentioned
It is mobile that liter handle makes to be flapped toward left side, then puts down lifting handle and makes sheet rubber lower edge contact to earth gently, puts sliding length against sheet rubber
Gage, makes gage left end be directed at sheet rubber lower edge；Mention lifting handle again to make to be flapped toward right side movement, then put down lifting handle and make rubber
Sheet lower edge contacts to earth gently, checks that sheet rubber lower edge should flush with the right-hand member of sliding length gage；If flushing, then explanation sheet rubber two
The secondary distance contacted to earth meets the regulation of 126mm；When checking sliding length, should just contact road surface with rubber length of a film limit and be as the criterion, no
The strength forward slip of pendulum can be borrowed, do not conform to the actual conditions with the sliding length of non-calibrating；If not flushing, pendulum or pendulum-type are raised and lowered
The height of instrument zeroing base；The method of the height adjusting instrument base with the leveling serew on rotary apparatus base during fine setting compares
Convenient, but should be noted that holding air level is placed in the middle；Repetitive operation, until sliding length meets the regulation of 126mm；
7) pendulum is fixed on the cantilever of right side, makes pendulum be in horizontal release position, and pointer is allocated to right-hand member place parallel with fork；
8) open effusion meter (4), regulation valve (7), electromagnetic valve (5), water pump A (16), water pump B (11), regulate rainfall intensity, wait to drop
After rain a period of time, after the runoff coefficient of surface of test piece reaches preset value, press the release-push on the cantilever of right side, Shi Bai road
Face slips over；When fork falls after rise, catch, reading but not record, then make fork and pointer be replaced in level release position
Put；
9) repeat step 7) and step 8) operation 5 times, and read to remember the pendulum value every time measured；Maximum in 5 values of single point assay
Value cannot be greater than 3 with the difference of minima；During such as difference more than 3, Producing reason should be checked, and again repeat aforementioned every behaviour
Make, to meeting regulation；Take the meansigma methods pavement skid resistance value as single-point of 5 mensuration, round numbers；
10) in point position road table temperature under temperature measurement note condition of raining, accurately to 1 DEG C；
11) each measuring point is made up of 3 single-points, i.e. needs parallel assay 3 times at same observation station by the above process, measures with 3 times
The meansigma methods of result is as the representative value of this measuring point, and precision is 1 unit；3 single-points all should be positioned at same surface of test piece, single-point
Spacing is 20cm-30cm；The position of measuring point is with the positional representation of middle single-point.
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| CN110044813A (en) * | 2019-04-11 | 2019-07-23 | 东南大学 | A kind of detection method of frost region bituminous pavement wide temperature field coefficient of friction |
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| CN110044813B (en) * | 2019-04-11 | 2020-08-11 | 东南大学 | Method for detecting wide-temperature-range friction coefficient of bituminous pavement in frozen region |
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| CN106290145B (en) | 2019-03-01 |
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