The Applied Technical Services Family of Companies (FoC) performs ASTM C1260 testing for aggregates used in concrete to analyze and address the risk of damaging expansion through alkali–silica reaction (ASR) testing.
How Do You Detect Alkali-Silica Reactivity in Aggregates?
The ASTM C1260 testing procedure measures length changes in mortar bars exposed to an aggressive alkaline environment. These measurements help determine whether an aggregate may contribute to damaging expansion in real-world conditions. Because ASR can lead to cracking, loss of strength, and long‑term durability issues, many organizations rely on this test to make informed material decisions.
What is the Expansion Threshold for ASR Failures?
When testing to ASTM C1260: Standard Test Method for Potential Alkali Reactivity of Aggregates, mortar bars are soaked in a solution for 14 days and measured at specified intervals. For this standard, expansion of less than 0.10% at the conclusion of the testing period indicates the aggregate is generally considered safe from deleterious ASR. Expansion greater than or equal to 0.10% shows potential for alkali-silica reactivity.
Why ASTM C1260 Testing Matters
ATS performs alkali-silica reaction testing to ASTM C1260 as this method of testing offers several advantages for clients who need timely and dependable data. The method produces results in a relatively short time, supporting efficient project planning. It also provides a clear indication of aggregate reactivity, helping stakeholders reduce the risk of premature deterioration of concrete. When used early in the design or material‑selection process, the test helps prevent costly repairs and structural concerns. ASR testing’s primary benefits include but are not limited to:
- Early detection of potentially reactive aggregates
- Support for long‑term durability planning
- Reduced risk of ASR‑related cracking
- Data‑driven material selection
ATS’ Building and Construction Clients
ATS and SGS are proud to serve a wide range of clients both domestically and internationally. These clients rely on our ASTM C1260 testing to protect their projects and assets. ATS performs aggregates testing for:
- Manufacturers verifying aggregate suitability before production
- State and municipal agencies responsible for long‑term public works performance
- Contractors working on infrastructure, commercial, or industrial projects
- Engineering firms seeking reliable data to guide material specifications
- Property owners and developers confirming the durability of their structures
These clients value clear, accurate, and timely results that support compliance with project requirements and industry standards. Some of our most popular aggregates testing offerings include:
- Rebound Hammer Testing
- Temperature Testing
- Splitting Tensile Testing
- Shrinkage Testing
- Failure Analysis
ASTM C1260 Testing with ATS and SGS
The ATS FoC, a member of SGS since 2026, delivers ASTM C1260 testing with a focus on precision, consistency, and short turnaround times. Our ISO 9001:2015-registered, ISO/IEC 17025:2017-accredited laboratories adhere to rigorous quality procedures to ensure that each step of the test is performed with care. As leaders in the aggregate-testing space, we prioritize detailed reporting, clear and consistent communication, and a steadfast commitment to repeatable, dependable results. By choosing ATS for your concrete, aggregate, and ASR testing needs, clients gain access to a team that understands the importance of dependable materials testing, project efficiency, and long‑term structural performance.
Contact Us
Complete an online request form or call +1 (888) 287-5227 to schedule ASTM C1260 testing or learn more about our aggregate testing services.
