The DOSAMATIC system patented by Bernardi is an innovative method to dose the components in continuous Asphalt Plants.
The DOSAMATIC is not a single machine or equipment but it is a concept which involves and changes all the machines of the CEM type asphalt plant and its electronic system of control.
To avoid the usual disadvantages of the traditional continuous plants, it has been necessary to eliminate the variables of the aggregates, still keeping the great advantages of the continuous plants.
To achieve this it was necessary to provide a continuous plant with the instruments generally used in batch plants. In other words, to introduce in the continuous process the favourable characteristics typical of batch plants.
The application and the realisation of the first idea, require to provide the continuous plant with:
A) a number of weighing tanks corresponding to the number of elements to be added to the aggregates complete with their charging and transferring system devices;
B) a suitable valve to interrupt the continuous flow of the hot mix from the mixer;
C) a hopper with loading cell system and discharging gate;
D) the automatism and the control software able to operate as follows:
- weighing for deduction, extracting from the corresponding hoppers, with pumps and screws the materials: bitumen, filler, other elements added to the aggregates,
- interrupting, at certain times the flow of the finished product in the hopper,
- recording the increase of weight of the product entering the hopper,
- recording continuously the weights of the quantities of materials added.
With the DOSAMATIC system, the bitumen has a weighing dosing system. Its dosing as well as the one of the other elements added, made with the same system, is much more sure and, above all, independent from the working temperature.
