ASTM C1240
Full Name
ASTM C1240 – Standard Specification for Silica Fume Used in Cementitious Mixtures
Scope
ASTM C1240 outlines the requirements for silica fume used in concrete and other cementitious systems. Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys, and it is highly beneficial in enhancing the properties of concrete.
The scope of ASTM C1240 encompasses the following key aspects:
- Material composition: the standard specifies the chemical composition of silica fume, primarily amorphous silica, with limits on impurities like loss on ignition, moisture content, and specific chemical elements.
- Physical properties: it outlines requirements for physical properties such as bulk density and specific surface area, which are important for the performance of silica fume in concrete.
- Performance requirements: the standard establishes minimum performance criteria for silica fume, including its reactivity with cement alkalies and its ability to reduce mortar expansion. These requirements ensure that the silica fume contributes to the desired properties of the concrete mixture.
- Test methods: it provides standardized test methods for evaluating the chemical and physical properties of silica fume, as well as its performance in concrete. These tests help ensure consistency and reliability in the quality of silica fume used in construction.
- Sampling and testing frequency: the standard provides guidelines on the frequency of sampling and testing to ensure that the silica fume consistently meets the specified requirements.
By adhering to ASTM C1240, manufacturers and users of silica fume can ensure that the material meets the necessary quality standards for use in concrete and other cementitious applications. This contributes to the production of high-performance concrete with enhanced durability, strength, and resistance to various environmental factors.
ASTM C1240 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C1240 standard.
Contact us today to learn more about our silica fume testing capabilities and how we can support your quality control and product development efforts.
Resources
Keywords
silica fume; cementitious mixtures; concrete; amorphous silica; chemical composition; physical properties; performance requirements; test methods; bulk density; specific surface area