Study on Permeability and Blocking Resistance of Composite Specimen with Double-Layer Permeable Asphalt Mixture

Table 1

Technical indexes of coarse aggregates.

Indexes	Unit	Actual measurement
Crushing value	%	13.5
Apparent relative density	—	—
Water absorption	%	1.2
Strength	%	9.4
Needle and plate particle content	%	8
Content of <0.075 mm material	%	0.43
Adhesion with SBS modified asphalt	Level	5