Method and system for calculating and reporting slump in delivery vehicles

A system for calculating and reporting slump in a delivery vehicle having a mixing drum, comprising:

• a liquid component source;
• a flow valve coupled to the liquid component source and configured to control the amount of a liquid component added to the mixing drum;
• and
• a flow meter coupled to the flow valve and configured to sense the amount of liquid component added to the mixing drum;
• a processor electrically coupled to the flow valve and the flow meter, wherein the processor controls the amount of liquid component added to the mixing drum to reach a desired slump.

A method of calculating and reporting slump in a delivery vehicle having a mixing drum and a hydraulic drive for rotating the mixing drum, comprising:

• a processor sensing activity of the mixing drum including one or more of a rotational speed of the drum and a hydraulic pressure applied to turn the drum;
• using the sensed activity rotational speed of the mixing drum to evaluate delivery vehicle activity;
• and
• communicating vehicle activity information to a status system commonly used in the concrete industry.