Why is ASTM C128 Testing Required for Concrete Mix Design?
The Applied Technical Services Family of Companies (ATS FoC) provides ASTM C128 testing to determine the relative density, absorption, and absolute volume of fine aggregates, helping guide mixture proportions and moisture adjustments.
Measuring an aggregate’s relative density is essential for accurate mix design, material selection, and construction quality. ASTM C128 focuses on fine aggregates, such as small stone particles or sand, and evaluates their water absorption.
How Does Fine Aggregate Testing Facilitate Construction Reliability?
Aggregates influence the physical properties of construction projects, including buildings, critical infrastructure, and roadways. Understanding aggregate properties helps engineers predict how materials will behave in specific applications and make informed mix design decisions.
Absorption data indicates how much water the aggregate will absorb, enabling producers to adjust water additions and maintain the intended water-cement ratio. This process supports precise concrete mix proportions and consistent batch quality. Proper aggregate characterization contributes to durable concrete strength and reduces potential defects, rework, and long-term performance issues, supporting reliable construction outcomes.
Our Full Range of Aggregate Testing Services
In addition to ASTM C128 testing, the ATS FoC can also assess other aggregate characteristics, including but not limited to:
- Gradation Reports/Sieve Analysis: particle size distribution
- Clay Lumps and Friable Particles: material suitability and conformity
- Specific Gravity and Absorption: density and porosity
- Material Characterization: structure, properties, and composition
- Soundness Testing: durability under weathering
- Flat and Elongated Particles: aggregate shape characteristics
- Moisture Content Analysis: mix design and compaction
- Performance Analysis: aggregate behavior under specific conditions
- LA Abrasion: wear resistance and degradation
Our network of concrete testing labs leverages expertise and advanced technology to manage high-volume testing requirements.
ATS FoC: Construction Testing Services You Can Trust
As a leader in testing, inspection, calibration, and consulting (TICC), ATS FoC is dedicated to delivering quality services that help reduce costs and eliminate waste. We maintain several ISO 17025:2017 accreditations and ISO 9001:2015 registrations, demonstrating our ability to meet rigorous testing standards.
In addition to fine aggregate testing, the ATS FoC offers a range of services for the construction industry, including:
- Chemical Analysis
- Environmental Testing
- Mechanical Testing
- ICC Inspections
- Nondestructive Testing (NDT)
- Roof Analysis
- Rope Access Inspections
- Consulting
Our facilities support comprehensive quality control and assurance programs to maintain project integrity throughout every stage.
Contact Us
To evaluate the relative density of your aggregates, contact the ATS FoC by submitting our web form or calling +1 (888) 287-5227.

