How to extract the binder content without changing the chemical composition of this binder?
If you want to know the binder content of RAP, you can use the ignition method to burn the binder. The variation of mass will allow you to calculate the binder content.
If the idea is to recover the binder existing in the RAP, you need to use solvent and a centrifuge to separate the binder from the aggregate. In a second step, you can carry out a binder recovery process in a rotary evaporator to separate the solvent from the binder. I think this is the best procedure you can use. Nobody can ensure that the chemical composition of the binder won't change. When you just heat the binder, some loss of volatile fractions of the bitumen will occur. This also occurs in the construction practice.
Selected rejuvenator maybe a method to recycling of asphalt in hot asphalt mix.
i may help you with this .. but needs more details.. please inbox me
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