6506-2 - CUTBACK ASPHALT A liquid asphalt made by...

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1 CUTBACK ASPHALT - A liquid asphalt made by dissolving an asphalt in a petroleum solvent. TYPES OF CUTBACK ASPHALTS 1. RAPID CURING (RC) Relatively hard asphalt (600 - 2400 P at 60 C or 80-120 Pen) dissolved in gasoline. 2. MEDIUM CURING (MC) Asphalt of intermediate hardness (300 - 1200 P at 60 C or 120-250 Pen) dissolved in kerosene (or kerosine). 3. SLOW CURING (SC) Soft asphalt dissolved in diesel oil (Kinematic viscosity of asphalt residue from SC - 70 = 4 - 70 St at 60 °C) TESTS ON CUTBACK ASPHALTS (1) Kinematic Viscosity Test Used for grading of cutbacks Examples: RC-70 - Rapid Curing Cutback with a kinematic viscosity of 70 - 140 cSt at 60 °C MC-250 - Medium Curing Cutback with a kinematic viscosity of 250-500 cSt at 60 °C
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2 (2) Flash Point Test Tag Open Cup used for RC and MC cutbacks. Cleveland Open Cup used for SC cutbacks (3) Distillation Test Measures distillates at various temperatures. Used to control curing rate and composition (amount of asphalt residue) Distillation Test for Cutback Asphalts (4) Tests on Residues from Distillation (A) Viscosity ( or Penetration) (B) Ductility (C) Solubility in trichloroethylene (5) Water Content Test Water content has to be low to prevent foaming of asphalt when heated
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EMULSIFIED ASPHALTS (or Asphalt Emulsions) Definition: A colloidal mixture of asphalt cement, water and emulsifying agent. Two kinds of asphalt emulsion:
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This note was uploaded on 05/26/2011 for the course CGN 6505 taught by Professor Mang during the Spring '11 term at University of Florida.

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6506-2 - CUTBACK ASPHALT A liquid asphalt made by...

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