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Mixing MethodsThe mixing methods play a very important role in the concrete mixing and producing process. In general in the mixing methods the concrete mixer hardware is only one of several mechanisms involved in it. The typical concrete mixing process also includes the loading method, the discharge method, the mixing time, and the mixing energy. Lets learn more about different mixing methods with the help of important aspects involved in the process. Of the different methods is the loading method, which includes the order of loading, the components into the mixer along with the duration of the loading period. Duration of this period depends on how long the components are mixed dry before the addition of water and how fast the components are loaded. The loading period is extended from the time when the first component is introduced in the mixer drum to the time when all the constituents are in the mixer. The loading period is divided into two parts, which are dry mixing and wet mixing. Dry mixing is the method that takes place during loading but before water is introduced. Wet mixing is the mixing after or while water is being introduced, but still during loading. In this method loading period is important because some of the concrete properties will depend on the order in which the components are introduced in the mixer. It is a fact that the delayed addition of high range water reducer admixture (HRWRA) leads to a better dispersion of the cement. Thus the same workability can be achieved with a lower measured quantity of HRWRA. The discharge from the mixer should be prearranged so that it increases productivity, and it does not alter the homogeneity of the concrete mix.
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