The Applied Technical Services Family of Companies conducts alkali reactivity aggregate testing in accordance with ASTM C1293, the Standard Test Method for Determination of Length Change of Concrete Due to Alkali-Silica Reaction. This test determines whether an aggregate, alone or with pozzolan or slag, may cause harmful expansion from alkali-silica reaction (ASR). By monitoring changes in concrete prism length, the method provides essential data for engineers to assess aggregate reactivity and develop ASR mitigation strategies.
How Does ASTM C1293 Testing Evaluate Alkali-Silica Reactivity?
ASTM C1293 evaluates ASR potential by measuring the expansion of concrete prisms containing the test aggregate. Reactive siliceous materials interact with the alkaline environment, producing expansive products that cause cracking and deterioration. Our laboratory tracks prism length changes and compares results to established criteria. ASTM C1293 results indicate whether an aggregate or combination poses a risk of harmful expansion. The standard also allows supplemental testing, such as petrographic examination, to confirm ASR and identify reactive constituents.
About Our ASTM C1293 Testing Services
Our AASHTO R18 and ISO/IEC 17025 accredited laboratory offers specialized aggregate and concrete testing, supported by experienced technical staff and advanced resources. Our ASTM C1293 services assess the potential for alkali-silica reaction (ASR) by monitoring length changes in concrete specimens containing the aggregate under evaluation. Testing covers aggregates used alone or with pozzolans, slag, or other supplementary cementitious materials. We prepare and condition specimens according to prescribed laboratory procedures and document expansion measurements at specified intervals. Our quality-focused approach ensures reliable results for aggregate qualification, ASR mitigation studies, concrete mixture evaluation, and research programs. When appropriate, we incorporate complementary ASTM methods to provide a comprehensive assessment of aggregate reactivity and concrete performance.
How Can ASTM C1293 Testing Help Qualify Aggregate Sources?
ASTM C1293 testing provides valuable long-term performance data for evaluating aggregates in concrete applications. It supports comparison of aggregate sources, identification of potentially reactive materials, assessment of aggregate combinations, and ASR mitigation decisions. Results inform concrete mixture development and guide project teams on the need for additional precautions or supplementary cementitious materials. ASTM C1293 results should be considered as part of a broader assessment, as actual concrete performance depends on factors such as alkali content, moisture, temperature, and exposure conditions.
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