FRACTIONAL COMPONENTS OF ASPHALTS-MODIFICATION OF THE ASPHALTENES FRACTION AND DISCUSSION

RESULTS OBTAINED BY ADDING HIGH MOLECULAR WEIGHT POLYMERS TO ASPHALT SURFACINGS AS A THIRD INGREDIENT OF A PAVING MIXTURE HAVE BEEN REPORTED IN THE LITERATURE IN CONNECTION WITH THE PROCESS KNOWN AS "RUBBERIZING ASPHALT". THE USE OF AN ELASTOMER AS A THIRD INGREDIENT OF A PAVEMENT IS, HOWEVER, ONLY REMOTELY RELATED TO THE CONCEPT EMPLOYED IN THE PRESENT STUDY, WHICH DEALS WITH INTERMINGLING HIGH MOLEUCLAR WEIGHT POLYMER MOLECULES WITH THE ASPHALTENES MOLECULES OF AN ASPHALT FOR THE PURPOSE OF MODIFYING THE ASPHALTENES FRACTION. IN THE ONE CASE, THE POLYMER ADDED EXISTS TO THE LARGEST EXTENT AND IS DISCERNIBLE AS DISCRETE INDIVIDUAL PARTICLES OR AS A SEPARATE NET STRUCTURE. IN THE APPROACH EXPLORED IN THE PRESENT STUDY, THE POLYMER BECOMES PART OF THE ASPHALTENES FRACTION, IS ANALYTICALLY DETERMINED AS ASPHALTENES, AND DOES NOT CONSTITUTE A SEPARATE PHASE IN THE PAVEMENT MIX. THE REALIZATION OF THE VARIOUS FORMS IN WHICH A POLYMER PREVAILS IN A PAVEMENT IS NOT ONLY OF THEORETICAL INTEREST, BUT HAS CONSIDERABLE PRACTICAL IMPLICATIONS. IN THE ONE CASE, HOT MIXING OF THE THREE COMPONENTS--ASPHALT, AGGREGATE AND POLYMER--IS ADVOCATED IN ORDER TO PRODUCE IMMEDIATELY AN ELASTIC COMPOSITION; IN ACCORD WITH THE NEW CONCEPT, THE INTERMINGLING OF THE ASPHALTENES MOLECULES WITH THE POLYMER MOLECULES IS TO BE A DELAYED ACTION PHENOMENON, AND THE ADVOCATED PROCEDURE IS A FINISHING OPERATION PERFORMED COLD ON THE COMPACTED PAVEMENT. /AUTHOR/

• Supplemental Notes:
  • Vol 39, pp 532-574, 14 FIG, 8 TAB, 10 REF
• Authors:
  • Rostler, F S
  • White, R M
• Conference:
  • Association of Asphalt Paving Technologists Proc
• Publication Date: 1970

Subject/Index Terms

• TRT Terms: Asphalt; Asphaltene; Bituminous materials; Bituminous mixtures; Chemical composition; Fractions; Polymers; Surface treating
• Old TRIS Terms: Bituminous surfacing; High-molecular compounds
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211666
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 25 1971 12:00AM