Rutting Analysis of 100 mm Diameter Polypropylene Modified Asphalt Specimens Using Gyratory and Marshall Compactors

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Tapkin S., Keskin M.

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, vol.16, no.2, pp.546-563, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 16 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1590/s1516-14392013005000016
  • Journal Name: MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.546-563
  • Keywords: Marshall design, Superpave gyratory compactor, polypropylene fibers, repeated creep testing, universal testing machine, 100 mm specimens, design gyration number, DENSE BITUMINOUS MIXTURES, PERMANENT DEFORMATION, ENVIRONMENTAL-DAMAGE, SUPERPAVE, PREDICTION, CREEP, TEMPERATURE, CONCRETE, RESISTANCE, BEHAVIOR
  • Anadolu University Affiliated: Yes

Abstract

Compaction technique used in Marshall design does not model the process of actual rolling procedures on site exactly. Carrying out laboratory compaction of dense bituminous mixtures with Superpave gyratory compactors is a more realistic way of simulating actual compaction. In this study, mechanical differences of reference and polypropylene modified asphalt mixtures were compared using Superpave gyratory and Marshall compaction methods by carrying out repeated creep tests utilising universal testing machine. In addition, there is no standard Superpave design procedure for 100 mm diameter samples till date. The other purpose of this study is to propose new standards for the compaction and testing procedures of these 100 mm specimens. Indeed, extensive studies have shown that the design gyration number should be 40 for reference and 33 for polypropylene modified specimens under medium traffic conditions for the similar and specific type of aggregate sources, bitumen, aggregate gradation, mix proportioning, modification technique and laboratory conditions. Moreover, it was shown that, the asphalt samples produced by Superpave gyratory compactor were much resistant to destructive rutting effects than the asphalt specimens prepared by Marshall design.