Paving Asphalts PA Viscosity Grades Performance Grades for

Paving Asphalts (PA) Viscosity Grades - Performance Grades for Hot Mix (HMA) - Penetration Grades for Emulsions Residues - Paving Grades are moved by high temperatures (300 F+) Liquid / Cutback Asphalts Blender plus Solvent Rapid Cure (RC) = PA + Gasoline or Naptha Emulsified Asphalts Colloid Mill plus water and Emulsifier (soap) Anionic Emulsions Cationic Emulsions (C) - negative charge + positive charge Medium Cure (MC) = PA + Kerosene Rapid Set (RS) Slow Cure (SC) = PA + #2 Diesel • HFRS (High Float RS) Medium Set (MS) Each of the above cutback are available Rapid Set (CRS) Medium Set (CMS) • HFMS (High Float MS) in 4 viscosity ranges: Slow Set (SS) Slow Set (CSS) 70, 250, 800, & 3, 000 centistokes Quick Set (QS) Quick Set (CQS) Label Codes: 1 = Lower Viscosity; 2 = Higher Viscosity; AC = Asphalt Cement; C = Cationic; E = Emulsion; H = Hard Base; HF = High Float; LT = Low Temperature; MS= Medium Set; P or PM = Polymer Modified; QS = Quick Set; R = Rubber; RS = Rapid Set; SS = Slow Set

Classification of Aggregates Content of Silica Si. O 2 % 0 10 20 30 40 50 60 70 80 90 100 Siliceous Limestone Porphyries Basalts Positive Limestone Mixed Negative Sandstone (content of Ca. O) Diorites Ophites Granites Approximate Effective Range of Cationic Emulsions (positive +) Approximate Effective Range of Anionic Emulsions (negative -) 100 90 80 70 60 50 40 30 20 Content of Alkaline or Alkaline Earth Oxide % 10 0