ASTM C1567
Full Name
ASTM C1567 – Standard Test Method for Determining the Potential Alkali-Silica Reactivity of Combinations of Cementitious Materials and Aggregate (Accelerated Mortar-Bar Method)
Scope
ASTM C1567 outlines a test method for evaluating the potential alkali-silica reactivity (ASR) of combinations of cementitious materials and aggregate in mortar bars. ASR is a chemical reaction that can cause deleterious expansion and cracking in concrete structures.
The scope of ASTM C1567 includes:
- Accelerated testing: the test method employs an accelerated mortar-bar method to quickly assess the potential for ASR within 16 days. This accelerated approach saves time compared to long-term field tests.
- Cementitious material combinations: the test is applicable to various combinations of hydraulic cement, pozzolans (like fly ash or silica fume), and ground granulated blast-furnace slag (GGBFS). These supplementary cementitious materials are often used to mitigate ASR.
- Aggregate reactivity: it evaluates the potential reactivity of aggregates with alkalis present in the cementitious materials, which can lead to ASR if not properly controlled.
- Mortar bar preparation and testing: the standard specifies the preparation of mortar bars with the tested materials, followed by an accelerated aging process in a highly alkaline solution at an elevated temperature. The length change of the mortar bars is monitored over time to assess expansion.
- Evaluation criteria: criteria are provided for evaluating the potential alkali-silica reactivity of the combination based on the measured expansion. It helps determine whether the combination is potentially innocuous, potentially reactive, or requires further testing.
ASTM C1567 serves as a valuable tool for assessing the compatibility of cementitious materials and aggregates in terms of their potential for alkali-silica reaction, aiding in the selection of suitable materials for durable concrete construction.
ASTM C1567 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C1567 standard.
Contact us for more information.
Resources
Keywords
alkali-silica reactivity; mortar bars; cementitious materials; aggregates; expansion; accelerated testing; sodium hydroxide solution; length change; potential reactivity