HMA Bulk Specific Gravity: Modeling and First Validation for DGFCS

This paper describes how a proper measurement of the bulk specific gravity (GMB) for compacted Hot Mix Asphalt (HMA) samples is critical and essential from many points of view: (1) the introduction of Superpave and volumetrics; (2) the quality assurance and acceptance criteria; (3) the influence of air void content on surface characteristics (wet friction, splash and spray, raveling, stripping, etc.) and; (4) the mechanistic properties (resistance and moduli dependence on water action). Moreover, the bulk specific gravity is the basis for volumetric calculations used in HMA mix design, field control, and construction acceptance. Despite this, there are many ways to measure HMA density and different results can be obtained. In the light of above the main objectives and scope of this paper were confined to the field of the modeling of the bulk specific gravity as a function of the interaction fluid vs. specimen geometry. Experiments were designed and performed on Dense Graded Friction Courses (DGFCs). The laboratory evaluation studies indicate that specific gravities obtained according to different standards tend to be similar as far as higher values are considered. Practical applications and future research are also outlined in the paper.

• Corporate Authors:

  Politecnico di Torino

  Turin,   Italy 
• Authors:
  • Pratico, F G
  • Moro, A
  • Ammendola, R
• Conference:
  • Sixth International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV6)
  • Location: Turin , Italy
  • Date: 2009-7-8 to 2009-7-10
• Publication Date: 2009

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; Photos; References; Tables;
• Pagination: 10p
• Monograph Title: International Conference on Maintenance and Rehabilitation of Pavements and Technological Control (MAIREPAV6), Sixth Proceedings

Subject/Index Terms

• TRT Terms: Dense graded aggregates; Friction course; Hot mix asphalt; Laboratory tests; Mix design; Pavement performance; Quality assurance; Specific gravity; Stripping (Pavements); Texture
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01139020
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 31 2009 9:24AM