Regional Balanced Mix Design Workshops

Overview

Balanced mix design (BMD) is an enhanced approach to designing asphalt paving mixtures to achieve a satisfactory balance between rutting resistance and cracking resistance. Unlike the Superpave design approach, BMD focuses on optimizing mixture performance using simple mixture performance tests. BMD is expected to open the door to utilizing innovative materials and technologies to design asphalt pavements while providing agencies with a more reliable way to accept mixtures.

The recently completed NCHRP Project 20-07/Task 406 developed a framework to address alternate approaches for implementation of BMD procedures that incorporate performance testing and criteria. Major outcomes of the project included state highway agencies and asphalt contractors detailing their expectations for BMD, a literature review of current practices for mix design and performance testing, knowledge gaps and research problem statements, as well as a preliminary draft AASHTO standard practice and specification for BMD. To advance toward implementation, follow up is needed to promote the BMD framework and provide agencies and contractors with information and guidance on how best to proceed.

Location and Dates

The locations and dates for the six regional workshops are:

Eligibility

These workshops are designed for state highway agency materials engineers who are typically decision makers on mix design and acceptance specifications, asphalt industry mangers responsible for asphalt mix designs and quality control testing, and other stakeholders interested in gaining an understanding of balanced mix design.

Registration

All courses are currently full. There is no fee to attend, but pre-registration is required. Each workshop has a limit of 50 participants. Registrations will be filled on a first-come, first-served basis.

Costs for housing, food and transportation are the responsibility of each participant.

Objective

These workshops are designed to share the research findings and recommendations from NCHRP Project 20-07/Task 406 and encourage state highway agencies and asphalt contractors to move forward with balanced mix design implementation.

Topics Covered

  • - Superpave mix design limitations and refinements
  • - Balanced mix design definition and approaches
  • - Current mix design practices and modifications to improve performance
  • - Asphalt mixture performance tests
  • - Draft AASHTO standard practice and specification for balanced mix design
  • - Knowledge gaps and research needs
  • - Implementation and partnerships between agencies and industry
  • - Case studies and ongoing research
  • - Quality control and acceptance testing using performance tests

Materials

Each participant will be provided a copy of the PowerPoint presentations.

Instructors

These workshops will be conducted by NCAT Director & Research Professor Dr. Randy West and NCAT Assistant Research Professor Dr. Fan Yin.

Continuing Education Credits

The course will provide 0.8 CEUs or 8 Professional Development Hours.