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.

　　，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(dòng)性、自密實(shí)性等。要滿足工程結(jié)構(gòu)物強(qiáng)度、耐久性及其他特別設(shè)計(jì)要求。混凝土在配合比設(shè)計(jì)中要積極合理應(yīng)用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(qiáng)度。在混凝土中適量摻加粉煤灰、礦粉等外摻料，取代部分水泥和部分細(xì)骨料，在保證混凝土強(qiáng)度等級(jí)與工作性能要求下，可以顯著提高混凝土的密實(shí)性，增加對(duì)鋼筋的保護(hù)作用，同時(shí)降低混凝土經(jīng)濟(jì)成本。

　　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.
      

　　其次，混凝土攪拌機(jī)原材料的管理要加強(qiáng)，砂、石料場(chǎng)要有良好的排水設(shè)施，以免底部積水。水泥、粉煤灰等粉料倉(cāng)要有防潮、防雨措施。砂石料按品種、規(guī)格分隔堆放，避免混料。各種材料要標(biāo)識(shí)清楚，特別是水泥、粉煤灰筒倉(cāng)、外加劑貯存?zhèn)}等進(jìn)料口要加蓋標(biāo)識(shí)，專人管理，以防止進(jìn)錯(cuò)料或受污染。

　　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.

　　混凝土攪拌機(jī)能夠加快施工進(jìn)度、減少環(huán)境污染、改善施工條件、提高工程質(zhì)量和節(jié)約材料成本。但是，混凝土攪拌機(jī)的質(zhì)量控制也是不可遺漏的要點(diǎn)。

　　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.