00730234

Component

https://doi.org/10.3141/1535-09

http://scholar.google.com...rzal&publication_year=1996

The effects of polymer modification on microstructure, morphology, and failure modes of asphalt binders and their concretes were investigated using various test methodologies that have been newly developed or modified. Results from the good and bad samples (i.e., a new Marshall concrete specimen and an aged road core, flexible pavement that showed signs of stripping, respectively) confirmed the reliability and applicability of the test methods. Two different viscosity-graded asphalt binders, AC-5 and AC-10, with two types of network thermoplastics, styrene-butadiene-styrene and styrene-ethylene-butadiene-styrene block copolymers, were studied for void morphology, binder phase morphology, statistical void image analysis, and failure modes as a function of polymer concentration and test temperature. One of the most striking results is that a highly entangled fibrillar network structure has been observed from both straight and polymer-modified asphalt binders after an electron beam etching. It was also observed that the morphology of the network altered with prestraining or binder aging. Void morphology and statistical void analysis were well characterized with the methods developed, but no significant effect of polymer modification was observed. From the fracture studies, however, the polymer modification indicated strong influence on both microdeformation behavior and failute mode of the asphalt concretes.

This paper appears in Transportation Research Record No. 1535, Characteristics of Asphalt Binders.

English

p. 61-73

1996

Transportation Research Record

0309059100

Figures (9) ; Photos (2) ; References (14) ; Tables (1)

Aging (Materials); Bituminous binders; Failure; Microstructure; Morphology; Polymer asphalt; Reliability; Temperature; Test procedures

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB

Dec 13 1997 12:00AM

• ASPHALT-AGGREGATE INTERACTIONS CHARACTERIZED BY ZETA POTENTIAL AND RETAINED STRENGTH MEASUREMENTS FOR NATURAL AND ORGANOSILANE-TREATED AGGREGATES
• CHARACTERISTICS OF POLYMERS AND POLYMER-MODIFIED BINDERS
• CHARACTERIZATION OF FRACTURE IN ASPHALTIC MIXES BASED ON A MOLECULAR APPROACH
• DIFFERENTIAL SCANNING CALORIMETRY STUDY OF ASPHALT CRYSTALLINITY
• DYNAMIC MATERIAL FUNCTIONS AND THE STRUCTURE OF ASPHALTS
• EFFECT OF ASPHALT FILM THICKNESS ON SHORT- AND LONG-TERM AGING OF ASPHALT PAVING MIXTURES
• INFLUENCE OF AIR-BLOWING ON THE PERFORMANCE-RELATED PROPERTIES OF PAVING ASPHALT
• LABORATORY AGING AND ANNEALING OF ASPHALT BINDERS BY MICROWAVE RADIATION
• MODELING OF OXIDATIVE AGING BEHAVIOR OF ASPHALTS FROM SHORT-TERM, HIGH-TEMPERATURE DATA AS A STEP TOWARD PREDICTION OF PAVEMENT AGING
• PERMEABILITY OF ASPHALT SURFACE SEALS AND THEIR EFFECT ON AGING OF UNDERLYING ASPHALT CONCRETE
• POLYMER-MODIFIED ASPHALT CEMENTS USED IN THE ROAD CONSTRUCTION INDUSTRY: BASIC PRINCIPLES
• RELATIONSHIPS BETWEEN MOLECULAR WEIGHTS AND RHEOLOGICAL PROPERTIES OF ASPHALTS
• RHEOLOGY OF ASPHALTIC BINDERS AND THEIR EFFECTS ON ASPHALT CONCRETE
• USE OF LIME IN RECYCLING ASPHALT
• ZERO-SHEAR VISCOSITY OF BITUMINOUS BINDER AND ITS RELATION TO BITUMINOUS MIXTURE'S RUTTING RESISTANCE