The binder content of bituminous mixtures is one of the major properties related to pavement performance. In particular, it affects the pavement's tendency to permanent deformation, fatigue life and susceptibility to moisture damage. Therefore, the measurement of this property is fundamentally important for quality control (QC),quality assurance (QA) and research purposes. In this context the ignition method can determine the binder content with high precision, offering a valid alternative to the solvent extraction methods.

Matest apparatus combines a sophisticated furnace and weighing system to continuously measure weight loss during combustion. It then automatically calculates binder content at the end of the test. Moreover, the method can be used for evaluation of mixture composition because the remaining aggregate can be used for determining aggregate gradation and density. 

The unit presents a 7" colour Touch screen controller with front panel user interface and easy to use step-thru operation. The user friendly software allows the operator to set up the test with the possibility of introducing data of the mix design for a greater accuracy of the results.

Considering the high temperatures involved (the furnace may reach a temperature of 750° C) the apparatus is equipped with suitable safety systems to ensure that the furnace door is kept closed during the test and that the heating elements are deactivated any time the door is opened. Analysis can be made on a sample weighing 5 kg and most tests are completed in 20 to 45 minutes. Average test times are from 20 mins (for 6 mm aggregates), to 45mins (for 40 mm aggregates).

An independently controlled afterburner with exhaust fan and vent reduces emissions so low that no aspiration hood is needed.