Concrete mixer? How much water is added? How can they tell? They say they can hear it.
Your question in some general I don't know what you ask is the concrete slump size can hear (that is, how much water per plate)? Or how much water is added to the mixer? Or how much water is contained in the aggregate, you can not calculate? (I can't hear it.).
Strictly speaking, the concrete construction of water according to the mixture ratio, but the actual construction defects, because sometimes the large quantity of cement and admixture is just the factory pulled over, especially in the summer high temperature so the construction ratio of water did not reach the required to add water mixing machine. Now are standardized management, automatic metering system, water consumption is displayed on the monitor, as a mixer operator, usually want to add more water, so the mixer outlet is not easy to block the mouth. What you said is out of the water to the water when you add the mixer load is small, the general operating platform are voltage meter, if the concrete dry voltage meter is high if the discharge outlet will be blocked, a small current that is segregation. In a listening, listening mixer, the sound of mixing is judged by adding more water. To put it plainly, the main thing is to look at the ammeter. As for the amount of water added, it was accumulated by an experienced operator at work. How to add water is mixing water consumption, such as the display on the 100kg, all materials are into the mixer hopper, the manual button to add water.
Not according to the hearing, but according to the time of the drainage, the regular mixer should have a flow meter.
