Description
Automated laboratory equipment, designed to carry out the strength test to fatigue on 2 or 4 trapezoidal specimens of bituminous materials (NF EN 12697-24 Appendix A).
This material also allows for the use of a specific enclosure, to measure the complex modulus (an isotherm) on 4 trapezoidal specimens of bituminous materials (2PB-TR) according to standard NF EN 12697-26 Appendix A.
Fatigue strenght test :
The trapezoidal specimens are subject to displacement imposed by bending in 2 points for a given frequency of sinusoidal displacement. The test is repeated for 3 deformations at controlled temperature.
The result is the fatigue slope calculated from three deformations and the allowable deformation ɛ6 to obtain a life expectancy of 106 cycles.
Complex test module :
Test specimens are subject to constant sinusoidal loads on the head at set frequencies and temperatures. The result is the module averages of 4 specimens tested. The value of module retained in the standards produced is the module at 15 °C and 10 Hz. The test is practiced on trapezoidal specimens collected from roads or sawn on plates manufactured in the laboratory using the BBPAC plate compactor. The test temperature is regulated and controlled.
