Balanced Mix Design

Our Approach

BMD is not simply a matter of running performance tests. It requires technical interpretation and informed decision-making.

What Balanced Mix Design Involves

Balanced Mix Design evaluates mixture performance using laboratory testing intended to better predict field behavior and guide mix optimization.

Depending on project goals and agency requirements, BMD evaluations may include:

• Hamburg Wheel-Track Testing (HWT) for rutting resistance and moisture susceptibility

• IDEAL-CT or other cracking performance evaluations

• Indirect tensile performance characterization

• Binder performance evaluation

• Aggregate characterization

• Aging protocols

• Density and volumetric analysis

• Production mix verification

• Comparative evaluation of additives, recycled materials, or alternative formulations

Test selection and performance thresholds vary by agency, specification framework, and project application.

When the Results Don’t Align

One of the most common BMD challenges occurs when performance results conflict.

Examples include:

• Volumetrics that satisfy specification requirements while cracking performance falls short

• Improved rutting resistance accompanied by reduced cracking performance

• Changes in RAP or binder content that shift durability outcomes

• Additives that improve one performance metric while creating tradeoffs elsewhere

• Production variability that changes laboratory expectations

At that point, the issue is no longer obtaining more data. The issue is understanding what the data indicates and identifying practical adjustment pathways. 

Here’s a recent blog post that provides two strategies to try if results don’t align.

Why Interpretation Matters

Performance testing identifies behavior. Interpretation identifies next steps.

BATT works with producers, agencies, consultants, and product developers to evaluate test outcomes within the broader context of mixture behavior, materials interaction, constructability, and performance expectations.

That experience helps clients answer critical questions such as:

• Is the issue aggregate structure, binder behavior, aging sensitivity, or another contributing factor?

• Would a binder grade adjustment improve cracking resistance without compromising rutting performance?

• Is RAP content influencing flexibility beyond acceptable limits?

• Could additive selection or dosage improve balance?

• Is the issue laboratory conditioning, specimen preparation, production variability, or true material performance?

The goal is not simply to report pass/fail outcomes. It’s to provide technically grounded direction.

BATT’s Balanced Mix Design Experience

BATT brings practical experience in asphalt mixture evaluation, performance testing, forensic investigation, materials troubleshooting, and product development support.

That broader perspective matters because Balanced Mix Design decisions are rarely isolated laboratory questions. They often involve production realities, specification constraints, material limitations, and long-term pavement performance considerations.

BATT supports clients by:

• Performing performance-focused mixture evaluation

• Interpreting conflicting or borderline test results

• Identifying likely performance drivers

• Advising on practical mix adjustment strategies

• Evaluating alternative materials and additive approaches

• Supporting specification-driven testing requirements

• Assisting with troubleshooting during mix refinement

Clients rely on BATT not only for accurate testing, but for experienced technical guidance that helps move projects forward.

Request Balanced Mix Design Support

Whether you are developing a new mix, refining an existing design, evaluating specification compliance, or troubleshooting conflicting performance results, BATT provides the technical testing and engineering interpretation needed to support informed decisions.

Need help getting a mix across the finish line? Contact BATT.