FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
- Description:
FAP1000/FAP1000-R Friction After Polishing Testing Device According To Wehner/Schulze
- Model:
FAP1000/FAP1000-R
- Manufacturer:
APS-WILLE Geotechnik
Product Information
  • Description
  • Standard
  • Feature
  • Specification
  • Configuration
  • Software
Description

FAP1000/FAP1000-R 全自动路面材料抗滑抗磨耗测试系统 Wehrwr/Schulze

This new developed fully automatic deviceis made as a laboratory testing device for skidresistance prediction and polishing resistanceof asphalt, concrete and aggregates by Wehner/Schulze method according to EN 12697-49:2014.


This method of the test has the ability to testlarge samples which can be obtained directlyfrom the actual road, or compacted samples frommixed materials or plate single aggregates whichthese both types are manufactured in laboratoryto simulate the polishing action of vehicles onroad surface.


In accordance to many years of research workin different Universities and material testinginstitutes a new FAP (Friction after polishing)device is developed, which includes theconclusions of experiences and testing results.


This new device stays loyal to the originaltechnical measuring concept, but our engineersmodernized and optimized the mechanical andelectronic parts of the components and alsomade easier handling of the system accordingto international technical requirements andindustrial standards. Also, we looked to a newsoftware solution as well.

路面抗滑性

Controlling / Electronic Station

High quality industrial controller with touchpanel and graphic display for simultaneousmonitoring of measured values and testprocedures is located in Electronic cabinet. Allelectronic parts and relays of device are mountedhere.


Operator is able to control of the entire devicevia touch panel Display (including the input ofthe basic parameters, Calibration data, languageand help settings). The Graphical and easy-tounderstand menu navigation is an advantage ofusing the deice. The Data exports via Ethernetinterface (ASCII Format) to the pc as an optionalevaluation software is also available.

The controller has 16-bit resolution for allmeasured and controlled variables and is 5 measurements can be saved internally (via thesoftware).In the lower part of the electronic station andin the same cabinet, there is an incorporatedcontainer and pump for quartz flour/watertreatment.


This quartz flour/water would be continuouslyadded during polishing process that is simulatingtraffic by using rubber rollers which polish theslab surface.

There is an emergency stop button, an indicatorand on/off switch on the door of cabinet for easyhandling of the system.


路面抗滑性

Accelerated Polishing Head

At the polishing workstation (on the left sideof main unit), a core specimen with 225 mmdiameter or rectangular sample of 320mm by260mm is held in a mould on a round base andattached firmly to the mounting table under thepolishing rollers in the machine so that the tableand specimen surfaces are  parallel. 


The polishing operation is fully automatic,and the operator has to set test parameterse.g.: Number and speed of revolutions and thepolishing quartz flour/water temperature.

Then the device starts to simulate the acceleratedvehicle impact on sample by three rubber conicalrollers. Rubber cones are lowered to contact thesurface of sample and rolling over the specimensurface during the polishing process per asrelevant standard.


The rotation frequency of rollers is 500 rotationsper minute (giving a linear speed 17 km/h) instandard version. The pressure between the rollerand the sample is 0.4 N/mm2 (tyres pressure forpassenger cars is about 0.25 N/mm2). 

A suspension fluid consisting of about 5% quartzpowder in 95% tap water is mixed at a controlledtemperature of 200C in a separate tank and issupplied through the center of the polishing headto the surface with a pumping rate of 5 l/min. topolish the sample surface during the test.


At the whole process of testing ,thepolishing parts and sample is surrounded by apolycarbonate shield.When the polishing process is completed, thesample is washed with tap water to remove

all traces of abrasive before starting of next stepwhich is the stage of measurement of the friction.

The mounting table automatically slidesbetween polishing station and the friction testingstation by a pneumatic actuator very smoothly.

FAP1000/FAP1000-R 全自动路面材料抗滑抗磨耗测试系统 Wehrwr/Schulze

Friction Meaxurement Head

The friction measurement head is equipped withthree small rubber slider pads attached to a rotatinghead and a system for measuring the momentumduring breaking. The mounted specimen ismoved and locked into position under the frictionmeasurement head and a polycarbonate shield islowered around the specimen.

The measuring head is accelerated until to reacha speed of 2700 rpm (90 km/h) and at this momentwater at 10C degree is sprayed on to the specimento give a theoretical water film thickness of 0.5mm. 


When the measuring head reaches a rotationof 3000rpm, which is equivalent to speed of100km/h, the motor turns off and the head isdropped and pressed to the specimen surface.The contact pressure being 0.2 N/mm2 equivalentto 2bar (29psi) in tyre pressure. The rotation of themeasuring head decreases by the friction betweensliding blocks and the specimen surface up tocomplete stop.

Pure water is injecting to surface of sampleduring this breaking phase and rotation speed isrecorded by a proximity sensor and reaction forceis continuously measured by a torque transducer.

• In both polishing and friction measurement apolycarbonate shield is surrounding the sampleand testing parts.

• The sample is sliding from polishing station toFriction measuring workstation by the use ofpneumatic sliding system which does not need.


The machine comes with a cooling station whichhas a high-power capacity to reduce the waitingtime of temperature controlling of water for eachtest. The whole parts of the cooling system isCorrosion-less to make a long-term working lifetime for it.

Evaporator at back of the machine would dothe heat transfer to water to reach the requiredtemperature.

Standard

• EN 12697-49 2014

Feature

• Better function of pump and mixing system forabrasive-water-mixture

• Skid resistance measuring station (originaltechnical concept) with new developed highaccuracy torque measuring system

• Combined fully automatic test procedure forpolishing and skid resistance measuring

• Stainless steel construction for long lifetimeand corrosion protection

• New corrosion resistant temperature controlsystem

• Programmable test cycles for polishing,cleaning and measuring procedures

• High quality industrial controller with touchpanel and graphic display for simultaneousmonitoring of measured values and testprocedures

• Different control modes and functions withgraphic output are available, including rotatingspeed definition of test head

• Control-, data acquisition, monitoring and testreport with software solution forwindows 10

• Ethernet connection to PC for data analysis

• Different moulds for mounting the samples inthe Wehner/Schulze test device are available 

Specification
DescriptionTechnical Specification
Dimensions2500 x 2600 x 1200mm (HxWxD)
Weight1800kg (Machine 1500 kg, Control box300kg)
Power supply400 VAC (3Phase) / 16 A
Operational Environmental condition 5℃~ 40℃, 40% rel. humidity


Configuration

MAIN COMPONENTSThe device composed of different parts which arecontrolling/Electronic station, two workstationsfor polishing and for measuring friction, abrasivemixture station for quartz water treatment andtwo rotary heads, one for polishing and one formeasuring the friction on the testing specimensurface and a mounting table.


The test specimens  be prepared accuratelyflat before mounting in the mould otherwise thepolishing and friction measuring operations willbe affected from this unbalanced surface.A core specimen with 225 mm diameter orrectangular sample of 320mm by 260mm is heldin a mould and attached firmly to the mountingtable in the machine so that the table andspecimen surfaces are parallel. Themounting table automatically slides betweenpolishing station and the friction testing station.

路面抗滑性

① Polishing (left) and friction measuring (right)work stations

② Friction measurement head

③ Polycarbonate shield

④ Accelerated Polishing head

⑤ Sliding table

⑥ Temperature control unit and water pumpstation

⑦ Controlling / Electronic station

⑧ Abrasive mixture station

Accessories/Spare Parts

Accessories

• Clamping grips for round specimens, Ø 225 +/- 3mm, for heights from 30 - 50mm.

• Calibration plate for circular specimen Ø 225 +/-3 mm

• Clamping grips for rectangular specimens, 320 x260 mm, for heights from 30 - 50mm.

• Calibration plate for rectangular specimen


Spares Parts

• Set of rubber inserts (1 set = 3 pieces)

• Set of polishing rolls (1 set = 3 pieces)

• 3 bag of 10 kg quartz flour

• Bag of 25 kg blasting abrasive (corundum),without free silicates, grain size 0,5 – 1,5 mm