At what oscillation speed must the Orbital Shaker operate?

The correct oscillation speed for the Orbital Shaker to operate is 270 ± 10 revolutions per minute (rpms). Operating at this speed ensures optimal mixing of the materials in the shaker, which is crucial for achieving a uniform sample for testing. This speed is specifically designated to balance effective mixing with the minimal risk of introducing air bubbles or damaging delicate samples that could occur at higher speeds.

The designated range around this speed allows for slight variations in machine performance while still maintaining the reliability of the results. Consistency in the speed is important in asphalt testing as it helps ensure that the properties of the asphalt are accurately represented, leading to reliable data for quality control.

Understanding the significance of oscillation speed is essential in asphalt testing because deviations from the specified speed could compromise the integrity of the mixing process, affecting subsequent tests and the interpretation of the asphalt's properties.