ASTM C942
Full Name
ASTM C942 – Standard Test Method for Compressive Strength of Grouts for Preplaced-Aggregate Concrete in the Laboratory
Scope
ASTM C942 outlines the procedure for determining the compressive strength of hydraulic cement grouts designed for use in preplaced-aggregate concrete. This test method is specifically tailored for evaluating grouts that expand and harden under partially or fully restrained conditions, simulating their behavior in real-world applications.
Key aspects covered by ASTM C942:
- Purpose: the primary goal is to assess the compressive strength of grouts used in preplaced-aggregate concrete, with a particular focus on the impact of grout fluidifiers on compressive strength.
- Specimen preparation: the standard provides detailed instructions for preparing 2-inch (or 50-mm) cube specimens using a three-gang mold. It emphasizes the importance of proper filling, puddling, and finishing techniques to ensure consistent and representative results.
- Test conditions: the specimens are cured under specific temperature and humidity conditions, typically for 7 and 28 days, to simulate the curing environment of preplaced-aggregate concrete.
- Compressive strength testing: the compressive strength of the hardened grout cubes is determined using a testing machine, following the procedures outlined in ASTM C109.
- Significance and use: this test method is crucial for evaluating the quality and performance of grouts used in preplaced-aggregate concrete. The results help ensure that the grout meets the required strength specifications and can withstand the stresses and loads imposed during construction and service life.
By adhering to the standardized procedures in ASTM C942, engineers and technicians can obtain reliable and accurate data on the compressive strength of grouts, facilitating the selection of appropriate grout materials and mix designs for preplaced-aggregate concrete applications.
ASTM C942 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C942 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
compressive strength; grout; preplaced-aggregate concrete; hydraulic cement; test specimen; cube mold; curing; testing machine