ASTM C187
Full Name
ASTM C187 – Standard Test Method for Amount of Water Required for Normal Consistency of Hydraulic Cement Paste
Scope
ASTM C187 outlines the procedure for determining the amount of water needed to achieve a specific consistency in hydraulic cement paste. This consistency, known as “normal consistency,” is the condition where the paste has a certain degree of plasticity that makes it suitable for various tests.
The scope of ASTM C187 includes:
- Purpose: the main purpose is to determine the water content required to produce a hydraulic cement paste with a normal consistency.
- Principle: the method involves measuring the penetration of a plunger into a cement paste sample prepared with a specific water content. The normal consistency is achieved when the plunger penetrates a specified distance under its own weight.
- Apparatus: it describes the apparatus required for the test, including a Vicat apparatus, a mixing bowl, a spatula, a straightedge, and a balance.
- Procedure: it outlines the step-by-step procedure for conducting the test, including weighing the cement, adding water, mixing the paste, filling the Vicat mold, and measuring the penetration of the plunger.
- Calculations: it provides formulas for calculating the water content required for normal consistency based on the measured penetration.
- Precision and bias: it provides information on the precision and bias of the test method.
The standard applies to all types of hydraulic cement, including Portland cement, blended hydraulic cement, and masonry cement.
However, ASTM C187 does not cover:
- Other consistency measurements: the standard only focuses on normal consistency and does not address other consistency measurements, such as flow or slump.
- Factors affecting consistency: the consistency of cement paste is influenced by various factors, such as temperature, humidity, and the type of cement. These factors are not directly addressed in the standard but should be considered when interpreting the results.
Overall, ASTM C187 provides a standardized method for determining the water content required for normal consistency of hydraulic cement paste, which is essential for ensuring the consistency and comparability of results in various tests.
ASTM C187 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C187 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
normal consistency; hydraulic cement paste; water content; Vicat apparatus; penetration; mixing