CadnaA library asphalt types can be found directly in the "Asphalt Type" field of the edition menu of each section of the road:
When you click on the icon
further details of this library are accessed and new typologies with their respective parameters can be included:

CNS_01...CNS_15 correspond to the types of flooring defined in the following application guide to the CNOSSOS method (Table 9 of paragraph 3.5.4):