The greater characteristic of concrete mixer is that it is temporary and serves specific concrete engineering in a specific time. However, some concrete projects are prone to quality problems, which also have a great impact on the progress of the project and economic benefits. Therefore, the quality control of concrete mixer is very necessary.
First of all, the concrete mix proportion should ensure that the concrete has good working performance, such as pumpability, large fluidity, self compacting and so on. It should meet the strength, durability and other special design requirements of engineering structures. In the mix proportion design of concrete, water reducing agent and other concrete admixtures should be actively and reasonably used to reduce the water consumption of concrete, reduce the water binder ratio and improve the concrete strength. Adding high-quality fly ash, mineral powder and other admixtures in concrete to replace part of cement and part of fine aggregate can significantly improve the compactness of concrete, increase the protection of reinforcement and reduce the economic cost of concrete.
Secondly, the management of raw materials of concrete mixer should be strengthened. Sand and stone yards should have good drainage facilities to avoid water accumulation at the bottom. Moisture proof and rainproof measures shall be taken for cement, fly ash and other powder silos. Sand and stone materials shall be stacked separately according to varieties and specifications to avoid mixing. All kinds of materials should be clearly marked, especially the cement, fly ash silo, additive storage bin and other feeding outlets should be marked and managed by special personnel to prevent wrong feeding or contamination.
Concrete mixer can speed up the construction progress, reduce environmental pollution, improve construction conditions, improve project quality and save material cost. However, the quality control of concrete mixer is also an important point.
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