The Merits of Balance Mix Design

Many advancements in asphalt technology have occurred over the last 15-20 years including increased understanding of the materials used to produce Hot Mix Asphalt (HMA). However, there are still a number of challenges to the continuous improvement of asphalt mixture performance. The current methods used to perform volumetric mixture designs are only indirectly related to the quality of the material, and it's time to re-evaluate how we perform mix designs to more directly relate to expected performance. For a number of reasons, rutting is now not as troublesome as it used to be. However the focus has now shifted back to solving issues with the lack of durability and premature cracking in asphalt pavements. This paper presents the concept of balanced mix design and takes a close look at fundamental changes that should be considered to increase density, provide long-term durability, and improve cracking and rutting resistance. In order to impart these characteristics to the mixtures performance testing must be an integral part of the mix design process. The various tests being considered and the development of balanced mix design protocol by other agencies will be discussed in detail and recommendations will be provided.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 231-250
  • Monograph Title: Proceedings of the Sixty-third Annual Conference of the Canadian Technical Asphalt Association (CTAA)

Subject/Index Terms

Filing Info

  • Accession Number: 01893618
  • Record Type: Publication
  • Source Agency: Transportation Association of Canada (TAC)
  • ISBN: 9780986914171
  • Files: ITRD, TAC
  • Created Date: Sep 19 2023 2:27PM