Superpave : performance graded asphalt binder specification and testing / Asphalt Institute.

Ver: www.asphaltinstitute.org

CONTENIDO
Chapter 1: Background 1
Origins of Asphalt 1
Chemical COmposition of Asphalt 3
Asphalt Behavior 6
High Temperature Behavior 6
Low Temperature Behavior 9
Intermediate Temperature Behavior 10
Aging Behavior 11
Chapter 2: Asphalt Specifications 13
Asphalt Property Measurements 13
Superpave Asphalt Binder Specification 14
Chapter 3: Superpave Asphalt Binder Tests 17
Superpave Binder Aging Procedures 17
Rolling Thin Film Oven (RTFO) 18
Pressure Aging Vessel (PAV) 20
Superpave Binder Tests 21
Dynamic Shear Rheometer 22
Rotational Viscometer 29
Bending Beam Rheometer 33
Direct Tension Tester 38
Chapter 4: Pavement Performance in the Superpave Binder Specification 47
Safety 48
Pumping and Handling 48
Permanent Deformation 48
Excessive Aging 48
Fatigue Cracking 49
Low Temperature Cracking 49
Chapter 5: Binder Grade Selection 53
Air Temperature Selection 56
Pavement Temperature Selection 56
Binder Grade Selection Based on Pavement Temperatures 56
Adjusting Binder Grade Selection For Traffic Speed and Loading 58
Member Companies of the Asphalt Institute 61
LIST OF FIGURES
Annual Asphalt Usage 2
Component Analysis of Asphalt Cement 4
Types of Asphalt Molecules 5
Asphalt Cement Flow Behavior 6
Microscopic View of Liquid Flow Characteristics 7
Newtonian Fluid Behavior 8
Pseudoplastic (Shear Thinning) Behavior 8
Dilatant (Shear Thickening) Behavior 9
"Spring-Dashpot" Model of Viscoelastic Behavior 10
Variations of Three Viscosity-Graded Asphalts 14
Superpave Laboratory Tests - Relation to Performance 16
Rolling Thin Film Oven 18
RTFQ Bottle 19
Pressure Aging Vessel 20
Dynamic Shear Rheometer Operation 22
Viscoelastic Behavior 23
DSR Molds and Specimens, Plates and Spindles 24
Asphalt Sample Configuration in DSR 25
Dynamic Shear Rheometer 26
Stress-Strain Output for a Constant Stress Rheometer 27
Stress-Strain Response of a Viscoelastic Material 28
DSR Asphalt Specimen Calculations 28
Rotational Viscometer 30
Rotational Viscometer Operation 30
Rotational Viscometer 31
Rotational Viscometer Displays 32
Bending Beam Rheometer 33
Aluminum Mold Assembly 34
Bending Beam Test 36
BBR Deflection and m-value 38
Typical BBR Deflection and Load Output 39
Direct Tension Test Specimen 40
Determination of Failure Strain in the Direct Tension Test 41
Determination of Failure Stress in the Direct Tension Test 41
Direct Tension Specimens 42
Direct Tension Test Specimen Before and After Trimming 43
Direct Tension Test Loading System 44
Thermal Stress Curve for Determining Critical Cracking Temperature 45
Superpave Binder Specification Format 47
Superpave Specification Rutting Factor Requirement 49
Superpave Specification Fatigue Cracking Factor Requirements 50
Superpave Specification Low Temperature Requirements 50
Design Temperature Reliability 55
Example High and Low Air Temperature Variations 55
Example High and Low Pavement Temperature Variations 56
Superpave Binder Grade Selections for Cleveland 57
LIST OF TABLES
Elemental Analysis of Four Asphalt Cements 3
Superpave Binder Test Equipment 15
Superpave Binder Test Aging Condition 21
Example DSR Test Information 29
Example BBR Test Information 39
Example DTT Test Information 44