ASTM C157
Full Name
ASTM C157 – Standard Test Method for Length Change of Hardened Hydraulic-Cement Mortar and Concrete
Scope
ASTM C157 covers the determination of length changes in hardened hydraulic-cement mortar and concrete specimens. These changes are caused by factors other than externally applied forces and temperature fluctuations.
The standard focuses on:
- Laboratory testing: specimens are prepared in the laboratory and exposed to controlled temperature and moisture conditions.
- Length change measurement: the test method measures the changes in length of the specimens over time.
- Causes of length change: the standard helps to identify the causes of length change, such as drying shrinkage, autogenous shrinkage, and expansion due to internal reactions.
- Comparative evaluation: it allows for comparative evaluation of the potential for length change in different hydraulic-cement mortar or concrete mixtures.
This test method is valuable for:
- Assessing potential for volumetric changes: it helps assess the potential for volumetric expansion or contraction of mortar or concrete due to various factors.
- Comparative evaluation of mixtures: it aids in comparing the performance of different mortar or concrete mixtures in terms of their dimensional stability.
- Experimental purposes: it can be used for experimental investigations or for testing products under non-standard conditions.
Overall, ASTM C157 provides a standardized approach for evaluating the dimensional stability of hydraulic-cement mortar and concrete, helping to ensure their long-term performance and durability.
ASTM C157 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C157 standard.
Contact us today to discuss your specific testing needs and how our services can help you make informed decisions.
Resources
Keywords
length change; hydraulic cement; mortar; concrete; shrinkage; expansion; drying; autogenous; curing; comparator; specimen