Computer-assisted method and device for controlling a concrete mixing facility

Data processing device for controlling a concrete mixing plant for producing ready-mixed concrete (1) or mixed concrete, which a motor-driven mixer unit (3) produces from at least the components cement (6a;

• 6b) and aggregates (8a, 8b, 8c) with the addition of water (9), the components being stored in respective silos (5a, 5b) connected to the material flow of the mixer unit(3) and/or on at least one stockpile surface (7),
• characterized in that an electronic prognosis unit (10) for calculating the required mixing time (tM) of the mixer unit (3) is provided, which takes into account the current moisture (F) of at least the aggregates (8a;
• 8b;
• 8c) to be added, measured via at least one moisture sensor (11), and the component temperature (TK), the mixer unit temperature (TM) and/or the outside temperature (TA) measured or determined via at least one temperature sensor (12;
• 13;
• 14) or thermal imaging camera, in order to determine the required mixing time (tM) of the mixer unit (3) on the basis of a concrete formulation (18), taking into account the measured values determined by the sensor system.

Data format of a documentation data record (25) for a concrete mixing plant for the production of ready-mixed concrete (1) or mixed concrete, at least comprising the following data fields (I-VI) associated with an order identifier (26):

• used concrete formulation (18),
• temperature readings (T) during the mixing and/or transport process,
• moisture readings (F) of at least one component used in the concrete mix design (18),
• actual quantities (M) of all components used for to the concrete mix design (18),
• predicted mixing duration (tM) of the mixer unit (3), and
• transport time to with waiting time (t) on construction site.