ASTM C305
Full Name
ASTM C305 – Standard Practice for Mechanical Mixing of Hydraulic Cement Pastes and Mortars of Plastic Consistency
Scope
ASTM C305 outlines the procedure for mechanically mixing hydraulic cement pastes and mortars to achieve a plastic consistency. This consistency is crucial for various tests performed on hydraulic cements.
The scope of ASTM C305 includes:
- Mixer specifications: it details the requirements for the mixer, which should be an electrically driven mechanical mixer of the epicyclic type with two specific speeds.
- Mixing bowl and paddle: it outlines the dimensions and material requirements for the mixing bowl and paddle.
- Mixing procedure: it provides a step-by-step procedure for mixing the cement paste or mortar, including adding the water, cement, and any other materials, and the mixing time and speeds to be used.
- Temperature control: it recommends maintaining the materials and mixing bowl at a consistent temperature for accurate results.
- Cleaning: it provides instructions on how to clean the mixer, bowl, and paddle after each use.
It’s important to note that ASTM C305 is a standard practice, not a test method. It focuses on the mixing process itself and does not cover the specific tests that might be conducted on the prepared paste or mortar. It also does not address the properties of the materials used or the interpretation of the results of any tests.
ASTM C305 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C305 standard.
Contact us today to learn more about our testing capabilities and how we can support your business.
Resources
Keywords
mechanical mixing; hydraulic cement; paste; mortar; plastic consistency; mixer; mixing bowl; paddle