The bigger characteristic of concrete mixer is that it is temporary and serves for specific concrete engineering in a specific time. However, some projects are prone to quality problems in concrete engineering, which also has a great impact on project progress and economic benefits. Therefore, the quality control of concrete mixer is very necessary.

，混凝土配合比要保證混凝土有良好的工作性能，比如可泵性、大流動性、自密實性等。要滿足工程結構物強度、耐久性及其他特別設計要求?；炷猎谂浜媳仍O計中要積極合理應用高能減水劑等混凝土外加劑，以減少混凝土用水量，降低水膠比，提高混凝土強度。在混凝土中適量摻加優量粉煤灰、礦粉等外摻料，取代部分水泥和部分細骨料，在保證混凝土強度等級與工作性能要求下，可以顯著提高混凝土的密實性，增加對鋼筋的保護作用，同時降低混凝土經濟成本。

First of all, the concrete mix proportion should ensure that the concrete has good working performance, such as pumpability, large fluidity, self compactness, etc. It shall meet the strength, durability and other special design requirements of engineering structures. In the mix proportion design of concrete, concrete admixtures such as high-energy water reducing agent shall be actively and reasonably applied to reduce the water consumption of concrete, reduce the water binder ratio and improve the strength of concrete. With the addition of appropriate amount of fine aggregate and fly ash, the concrete can significantly improve the performance of concrete and reduce the cost of concrete.

其次，混凝土攪拌機原材料的管理要加強，砂、石料場要有良好的排水設施，以免底部積水。水泥、粉煤灰等粉料倉要有防潮、防雨措施。砂石料按品種、規格分隔堆放，避免混料。各種材料要標識清楚，特別是水泥、粉煤灰筒倉、外加劑貯存倉等進料口要加蓋標識，專人管理，以防止進錯料或受污染。

Secondly, the management of raw materials of concrete mixer shall be strengthened, and the sand and quarry shall have good drainage facilities to avoid ponding at the bottom. Moisture proof and rainproof measures shall be taken for cement and fly ash silos. Sand and stone materials shall be stacked separately according to varieties and specifications to avoid mixing. All materials shall be clearly marked, especially the feed inlets of cement, fly ash silo and admixture storage silo shall be marked and managed by a specially assigned person to prevent wrong feeding or pollution.

混凝土攪拌機能夠加快施工進度、減少環境污染、改善施工條件、提高工程質量和節約材料成本。但是，混凝土攪拌機的質量控制也是不可遺漏的要點。

Concrete mixer can speed up 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 that can not be omitted.