Reflective crack relief layer that is permeable

A method of selecting a bituminous mixture for making a layer for a roadway, comprising:

• providing aggregate wherein no more than 5% by weight of the aggregate passing through a 75 μm screen and at least 70% by weight of the aggregate passing through a 2.36 mm screen;
• providing at least one bituminous mixture comprised of a bituminous binder and said aggregate, said binder being at least 7% of the mixture and said mixture having a dust to asphalt ratio of less than 0.9% ;
• performing at least one of a fatigue test and a permeability test on said at least one bituminous mixture;
• and
• selecting a bituminous mixture for said layer after performing the at least one of said fatigue and permeability tests based on at least one or fatigue and permeability performance of said at least one bituminous mixture, wherein aggregate in said selected bituminous mixture is sufficiently large so as to create at least 3% air voids in said bituminous mixture and allow for substantial permeability in said mixture.

A fatigue-resistant and vapor-permeable layer of roadway, comprising a mixture of:

• aggregate, wherein no more than about 5% by mass of said aggregate is able to pass through a 75 μm sieve and more than about 70% is able to pass through a 2.36 mm sieve;
• and
• a bituminous binder, said binder being at least 7% of said layer and said layer having a dust to asphalt ratio of less than 0.9% ;
• and
• wherein said layer as an Air Permeability value of at least 8 cm2 and has a Flexural beam Fatigue of at least 5000 cycles at 2000 microstrains, 10 Hz, and at 20° C in the first 24 hours after being placed.