IMPACT OF BINDER CONTENT ON SELECTED PROPERTIES OF STONE MASTIC ASPHALT

The behaviour of stone mastic asphalts SMA 11 and SMA 16 with different filler/binder combinations was investigated in order to find out whether Marshall and Gyratory methods provide the same optimum binder content. The investigations were complemented by determinations of rutting at relatively high temperatures of 60 degrees C using the LCPC (Laboratoire Central des Ponts et Chaussees) wheel tracking test. This report focuses on the results of SMA 11 because the final conclusions for SMA 16 were similar. It was found that none of the optimum soluble binder content values determined by the Marshall and the Gyratory compactor method were identical for any of the filler/binder combinations used. The optimum soluble binder contents determined using the Marshall compactor were distinctly higher than those using the Gyratory compactor. It is clear from the values of air void contents, voids of mineral aggregate (VMA) and volume of voids filled with binder (VFA) for all the mixes that stone mastic is more efficiently compacted with the Gyratory compactor than with the Marshall compactor. The kneading-type compaction of the bituminous composition achieved with the Gyratory compactor allows aggregate grains to move, as a result of which air voids are more readily filled than is the case with the impact compaction with the Marshall hammer. Hence, Marshall compaction does not appear to be suitable for stone mastic asphalt compositions. The investigations carried out on stone mastic asphalts SMA 11 and SMA 16 at 60 degrees C using the wheel tracking test revealed no excessive large permanent deformation for any of the filler/binder combinations under consideration. However, filler type does have a distinct influence upon permanent deformation at 60 degrees C. The polymer modified binder results in lower deformation values than in mixes containing the standard bitumen 50/70 (straight run). For the covering abstract see ITRD E121480.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9080288446
• Corporate Authors:

  FOUNDATION EURASPHALT

  PO BOX 255
  BREUKELEN,     3620 AG
• Authors:
  • NEUBAUER, O
  • Partl, Manfred N
• Publication Date: 2004

Language

• English

Media Info

• Features: References;
• Pagination: p. 1614-21
• Serial:
  • PROCEEDINGS OF THE 3RD EURASPHALT AND EUROBITUME CONGRESS HELD VIENNA, MAY 2004
  • Volume: 2
  • Publisher: FOUNDATION EURASPHALT

Subject/Index Terms

• TRT Terms: Binders; Compaction; Conferences; Evaluation and assessment; Mastic asphalt; Properties of materials; Rutting
• ITRD Terms: 4948: Binder; 3686: Compaction; 8525: Conference; 9020: Evaluation (assessment); 5925: Properties; 3081: Rutting (wheel)
• Subject Areas: Construction; Data and Information Technology; Materials; Planning and Forecasting;

Filing Info

• Accession Number: 00981009
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-802884-4-6
• Files: ITRD
• Created Date: Nov 3 2004 12:00AM