The figure also represents the second peak of the power curve. Complementary analysis based on three concrete mixer sensors confirms that the second power peak corresponds to the maximum cohesion point.
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The data acquisition being of only one measurement per second concrete pump, fluidity points are harder to detect by a power fluctuation analysis. However portable concrete mixer, the example corresponding to the batch with 169 l/m3 of total water shows that the method is still discriminate.
Once theconcrete mixer completely charged, the power consumption has a first peak. Constituents‘ loading is followed by a second power peak for batches with lower water dosage. The power then decreases and a relative stabilization occurs.
For the twelve batches, the experimental mixer power consumption evolution with respect to time. The indicated operation time includes the loading of the concrete mixer. The loading sequence generates an increase in power consumption.