Dyna-Track, wheel tracking apparatus

Product Code: 77-B3502

Introduction

The susceptibility of bituminous materials to deform is assessed by the rut formed by repeated passes of a loaded wheel at constant temperature. The test can be performed in the laboratory by the Dyna-Track, wheel tracking apparatus, conforming to the EN 12697-22 standards

General description

The Dyna-Track apparatus consists essentially of a loaded wheel, which bears on a sample held on a moving table. The table reciprocates with simple harmonic motion. The wheel is fitted with a solid rubber tyre of outside diameter of 200 mm. The sample table is fitted with a locking clamp for 200 mm dia. core sample and for rectangular slabs 300x400 mm using the sample confinement frames (see accessories).The machine is also provided by an auxiliary electric motor to lower and to lift the wheel assembly on and off the specimen at the beginning and at the end of the test. Furthermore two temperature sensors are provided: one to be placed inside the specimen and the other in the controlled temperature cabinet, which is part of the apparatus. The test is automatically controlled by a Data acquisition and processing system with large graphic display to monitor in real time number of cycles, rut depth and temperature.

Automatic test control by Data acquisition and processing system
Large permanent memory to store test data and results
RS 232 ports for connection to PC and printer
Large graphic display 240x128 pixel
Real time display of number of cycles, rut depth and temperatures
Tracks for specified number of passes or to specified rut depth
Adjustable load cycle frequency
Double temperature measurement: inside the specimen and in the cabinet
Auxiliary motor to lower and lift the wheel assembly to and from the specimen
Testing software included for procedures EN, A and B, and custom defined

Travel of the table: 230 ± 5 mm
Load cycle frequency: adjustable 20 to 40 cycles per minute
Wheel load: 700± 10N
Transducer for rut depth measurement: travel 25 mm
Rut depth measurement accuracy: better than 0.01 mm
Temperature controlled cabinet: adjustable from 30 to 65°C, ± 1.0°C
Moulds/sample dimensions: 300x400 mm (see accessories)

Power rating:

table 550W
auxiliary vertical displacement wheel motor 50W

Temperature monitoring: two sensors one for the specimen and one for the cabinet

Control system: Data acquisition and processing system featuring

SD 128 Mb permanent memory to store test data and results
No. 2 RS 232 port for connection to PC and printer
Large graphic display 240x 128 pixel
Real time display of number of cycles, rut depth and temperatures.

Overall dimensions: 1731x659x1705 mm (lxdxh)

Weight: 400 kg approx.

77-B3502/L25 Sample confinement frame, size 400x300mm, 25mm high. Suitable for use with machine adaptor.
77-B3502/L60 Sample confinement frame, size 400x300mm, 60mm high. Suitable for use with machine adaptor.
77-B3502/L100 Sample confinement frame, size 400x300mm, 100mm high. Suitable for use with machine adaptor.

Spare parts

77-B3502/11 Replacement rubber tyred rim for wheel tracker

Testing software

The multilingual testing software supplied with the machine (5 most spoken languages plus one that can be introduced by the user), provides data acquisition and processing, display in numerical and graphical mode of test data, data storing, data conversion in XIS format, batching of test data, print of test certificates and retrieve test data.
In particular, the software satisfies the two test procedure of the EN 12697-22 Standard, plus a "Custom” procedure user defined:

Procedure A (6 tests)

Determination of the Wheel-tracking rate for each one of the 6 test specimens: increase of the track depth, TR, in microns per load cycle
Determination of the Mean Wheel-tracking rate in microns per cycle
Determination of the Mean rut depth to ± 0.1 mm

Procedure B (2 tests)

Determination of Wheel-tracking slope in mm per 1000 load cycles
Determination of the Mean Wheel-tracking slope of the two specimens
Determination of the Mean proportional rut depth to ± 0.1
Determination of the Mean rut depth to ± 0.1 mm

Procedure “Custom”

Different tests can be programmed conforming user defined procedures

Generation of final test report conforming to the requirement of the EN Standard.

Dyna-Track, wheel tracking apparatus

Dyna-Track, wheel tracking apparatus

FEATURES