Add materials attribute

hub/city_model_structure/life_cycle_assessment/access_nrcan_catalogue.py

@@ -21,10 +21,12 @@ class AccessNrcanCatalog:
           self, path,
           archetypes='nrcan_archetypes.json',
           constructions='nrcan_constructions_cap_3.json',
+          materials='nrcan_materials_dictionaries.json',
           transparent_surfaces='nrcan_transparent_surfaces_dictionaries.json'):
     self._path = Path(path)
     self.archetypes = archetypes
     self.constructions = constructions
+    self.materials = materials
     self.transparent_surfaces = transparent_surfaces
     self.hub_to_nrcan_dictionary = HubFunctionToNrcanConstructionFunction().dictionary
 
@@ -46,6 +48,15 @@ class AccessNrcanCatalog:
     constructions_path = (self._path / constructions).resolve()
     self._constructions = json.loads(constructions_path.read_text())
 
+  @property
+  def materials(self):
+    return self._materials
+
+  @materials.setter
+  def materials(self, materials):
+    materials_path = (self._path / materials).resolve()
+    self._materials = json.loads(materials_path.read_text())
+
   @property
   def transparent_surfaces(self):
     return self._transparent_surfaces