Experimental investigation of blending phenomena in intergranular zones of recycled asphalt mixtures using customized infrared imaging and stage extraction methodsS. Vassaux (a) , V. Gaudefroy (a) , L. Boulangé (b) , A. Pévère (c) , A. Michelet (d) , V. Barragan-Montero (e) , V. Mouillet (c)