Used to test the consistency and setting time of cement, mortar, and concrete. Key features and functions include:
It consists of a frame with a graduated scale, a 300g rod, and interchangeable needles or plungers.
It measures the depth of penetration of the needle into the cement paste.
It determines the amount of water needed for standard consistency.
It assesses the initial and final setting times of cement.
It is used for quality control, research, and optimizing construction processes.
It meets ASTM and AASHTO standards.
The apparatus includes a mold, glass plate, and various needles and plungers.
Precautions include using standardized procedures and maintaining consistent conditions.