ASTM C1556
Full Name
ASTM C1556 – Standard Test Method for Determining the Apparent Chloride Diffusion Coefficient of Cementitious Mixtures by Bulk Diffusion
Scope
ASTM C1556 outlines a laboratory procedure for determining the apparent chloride diffusion coefficient of hardened cementitious mixtures. This coefficient is a crucial parameter for evaluating the resistance of concrete to chloride ion penetration, which is a key factor in the corrosion of steel reinforcement and the deterioration of concrete structures.
The scope of ASTM C1556 encompasses:
- Test method: the standard provides a detailed procedure for conducting the bulk diffusion test, which involves exposing saturated concrete specimens to chloride solutions and measuring the chloride penetration profile over time. The apparent chloride diffusion coefficient is then calculated from this profile.
- Materials: the test method is applicable to various cementitious mixtures, including concrete, mortar, and paste.
- Specimen preparation: it outlines the preparation of concrete specimens for the test, including casting, curing, and surface preparation.
- Test conditions: it specifies the test conditions, such as the chloride solution concentration, exposure duration, and temperature, to ensure consistent and comparable results.
- Data analysis: it provides guidance on analyzing the chloride penetration profile and calculating the apparent chloride diffusion coefficient using regression analysis.
- Significance and use: the standard explains the significance of the apparent chloride diffusion coefficient in assessing the durability of concrete structures and predicting their service life in chloride-laden environments.
In essence, ASTM C1556 provides a standardized and reliable method for evaluating the chloride ion penetration resistance of cementitious materials. This information is essential for selecting appropriate materials and designing durable concrete structures that can withstand the aggressive effects of chloride-induced corrosion.
ASTM C1556 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C1556 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
chloride diffusion coefficient; cementitious mixtures; concrete; chloride penetration; bulk diffusion; specimen preparation; test conditions; data analysis; corrosion; durability