when the filling level in the concrete mixing plant declines, the reaction of the cement with the admixture was brought out clearly with the help of dosage 2. Here, the aggregates were charged with the admixture and the water simultaneously and the cement was charged only after 30–40 s. Due to the charging of the water with the aggregates, the power consumption is briefly greater than in the case of dosage 1 but then again drops faster. After the charging of the cement, the power consumption increases again so that a delayed cement charge will result in an extension of the mixing time. Henan Daswell Machinery Co., Ltd,is a professional manufacturer and trader specializing in the research, development and production of construction machinery for nearly 30 years. Our main products are as follows:beton mixer, concrete batching plants,concrete mixer,blocking making machine,concrete pump,etc. The influence of the admixture can be explained in dosage 3. Here, the aggregates were charged with water and cement with admixture was dosed into the mixing chamber after about 30–40 s. The liquid was balanced out after the aggregates had been charged and this was indicated by a decline in the power output peak. An almost constant power consumption results after a mixing time of about 100 s by adding the cement and the admixture. The power consumption declines in proportion to the filling level in the mixer. This is caused by the fact that the admixture concrete batching plant, along with the reaction with the cement, must also be distributed in the entire mixture, so that the mixing time for theJZR500H Diesel-Engine Concrete Mixer is considerably extended. One can clearly see that the dosing sequences critically influence the power output development. The reproducibility of the individual variations of the dosing sequences of course becomes difficult as a result of manual dosing. Dosage 1, that is to say, the charging of the dry component with subsequent water or admixture charging, was considered most suitable for further investigations because the reproducibility of this variant proved to be very reliable even in case of manual charging.
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