FIELD: chemistry.
SUBSTANCE: invention relates to an asphalt-concrete mix for use as road surface. The invention relates to an asphalt-concrete mix for preparing a road surface layer, which is a mixture of the following components: aggregate material and bitumen binding material, wherein said asphalt-concrete mix contains air bubbles in amount of more than 5% and is vapour-permeable, wherein the vapour permeability is measured by testing for air permeability which is equal to at least approximately 8 cm2, wherein the said asphalt-concrete mix has fatigue strength which is such that when testing for flexural fatigue at load alternating frequency of 10 Hz, temperature 20°C, deformation of the asphalt-concrete mix reaches 2000 mcm/m after at least approximately 5000 cycles. The invention also relates to a method of preparing the asphalt-concrete mix, a method of selecting the asphalt-concrete mix and fatigue-resistant and vapour-permeable road surface layer.
EFFECT: obtaining an asphalt-concrete mix capable of slowing down reflexive crack formation and having high vapour-permeability for preventing swelling of the road surface due to accumulated latent vapour.
34 cl, 2 tbl
