Density (Unit Weight), Yield and Air Content (Gravimetric) of Concrete AASHTO T-121-05 (Modified)
Density, called “unit weight”, covers the determination of the mass per cubic meter (or cubic foot) of freshly mixed concrete and gives formulas for calculating the yield, relative yield, and the air content of the concrete. Yield is defined as the volume of concrete produced from a mixture of known quantities of the component materials (1.1). Since cement is an ingredient it is related to yield.Modifications:
1. In New Mexico, only vibrate Class E and F concrete.
2. Do not calculate cement content.
3. Calculate relative yield.
4. Re-mix the material prior to performing the Unit Weight test.
5. Protective equipment such as rubber gloves and eye protection shall be used.