, the self loading mixer is used to produce concrete, and the quality of concrete is closely related to the mix proportion. Now, due to the problem of environmental protection, China encourages centralized mixing of concrete, so the commercial concrete mixing plant has developed rapidly in recent years to produce concrete of different grades to meet the needs of various urban construction. The concrete mix proportion of different grades is naturally different. How to design the concrete mix proportion of the mixing plant and what design principles should be followed. How about the mix proportion of concrete with different grades? Is there a reference for the mix proportion of concrete with common grades? If there is a problem with the concrete, is there any method to adjust and remedy it on site?

,自上料搅拌车混凝土配合比的设计原则、配比参考及现场调整：搅拌站混凝土配合比设计方法时可遵循3个原则：水灰比，水灰比只要符合设计要求就行，在允许范围内都可以取值；用水量，用水量其实反映的是浆骨比参数。用水量越大，用灰量也越大，混凝土里面的浆体总量也越大。

, the design principle, proportioning reference and on-site adjustment of concrete mix proportion of self loading mixer truck: three principles can be followed in the concrete mix proportion design method of mixing plant: water cement ratio. As long as the water cement ratio meets the design requirements, it can be taken within the allowable range; Water consumption actually reflects the parameter of pulp bone ratio. The greater the water consumption, the greater the ash consumption, and the greater the total amount of slurry in the concrete.

在保证混凝土强度和工作性的前提下，尽量少用水、少用灰，多用骨料，这样才能减小混凝土的收缩开裂，保证混凝土的体积稳定性；砂率，即砂石比例。砂率越大，混凝土的弹性模量就越低。

On the premise of ensuring the strength and workability of concrete, use less water, ash and aggregate as much as possible, so as to reduce the shrinkage cracking of concrete and ensure the volume stability of concrete; Sand ratio, i.e. sand stone ratio. The greater the sand ratio, the lower the elastic modulus of concrete.

,自上料搅拌车混凝土配合比不对的现场调整方法：对于混凝土搅拌站而言，随时都会有机器故障、混凝土配合比不对的可能，所以在混凝土搅拌站运行时，我们需要在发现配合比不对时就及时做出调整。

, on-site adjustment method for incorrect concrete mix proportion of self loading mixer: for the concrete mixing plant, there will be the possibility of machine failure and incorrect concrete mix proportion at any time. Therefore, when the concrete mixing plant is running, we need to make adjustment in time when we find that the mix proportion is incorrect.

那么现场如何调整混凝土配合比呢？搅拌站混凝土配合比设计方法时可遵循3个原则：搅拌站常见标号的混凝土配合比参考；以下数据仅供搅拌站企业参考，以1立方为标准；C15：水泥强度配合比；32.5Mpa 卵石混凝土 水泥富余系数1.00 粗骨料大粒径20mm 塔罗度35~50mm每立方米用料量： 水：180 水泥：310 砂子：645 石子：1225 配合比为：0.58：1：2.081：3.952 砂率34.5% 水灰比：0.58；C20： 水泥强度配合比；水：175kg 水泥：343kg 砂：621kg 石子：1261kg 配合比为：0.51：1：1.81：3.68；C25：水泥强度配合比水：175kg 水泥：398kg 砂：566kg 石子：1261kg 配合比为：0.44：1：1.42：3.17C30：水泥强度配合比32.5Mpa 卵石混凝土 水泥富余系数1.00 粗骨料大粒径20mm 塔罗度35~50mm每立方米用料量：水：190 水泥：500 砂子：479 石子：1231 配合比为：0.38：1：0.958：2.462 砂率28% 水灰比：0.38搅拌站常见标号的混凝土配合比参考。

So how to adjust the concrete mix proportion on site? Three principles can be followed in the concrete mix proportion design method of mixing plant: the concrete mix proportion reference of common grades of mixing plant; The following data are only for the reference of mixing plant enterprises, with 1 cubic meter as the standard; C15: cement strength mix proportion; 32.5mpa pebble concrete cement surplus coefficient 1.00 coarse aggregate large particle size 20mm Tarot degree 35 ~ 50mm material consumption per cubic meter: water: 180 cement: 310 sand: 645 stone: 1225 mix proportion: 0.58:1:2.081:3.952 sand rate 34.5% water cement ratio: 0.58; C20: cement strength mix proportion; Water: 175KG cement: 343kg sand: 621kg gravel: 1261kg mix ratio: 0.51:1:1.81:3.68; C25: cement strength mix proportion water: 175KG cement: 398kg sand: 566kg stone: 1261kg mix proportion: 0.44:1:1.42:3.17c30: cement strength mix proportion 32.5mpa pebble concrete cement surplus coefficient 1.00 coarse aggregate large particle size 20mm Tarot degree 35 ~ 50mm per cubic meter material consumption: water: 190 water mud: 500 sand: 479 stone: 1231 mix proportion: 0.38:1:0.958:2.462 sand 28% water cement ratio: 0.38 concrete mix proportion of common grades of mixing plant.

现场坍落度超出配合比设计坍落度的限制时（±20mm）对砂石料含水率重新进行测定，对配合比进行校正，如果含水量实测、计算没有错误时，可以将减水剂掺量增加或减少0.05～0.1%进行调整。当新拌混凝土有泌水现象时，如果不是外加剂和胶凝材料的适应性的问题时，可以调整粗骨料的掺配比例，将级配调整到较佳，切不能套用固定掺配比例。当砂率偏大或偏小时。将砂率进行适当调整，调整比例为±1%。当用以上3项措施调整以后仍不能问题时，应立即进行停盘，由相关负责人共同分析原因及时采取措施，避免生产的混凝土质量不佳造成经济损失。

When the on-site slump exceeds the limit of the designed slump of the mix proportion (± 20mm), re measure the water content of the sand and gravel and correct the mix proportion. If there is no error in the actual measurement and calculation of the water content, increase or reduce the dosage of water reducing agent by 0.05 ~ 0.1%. If the mixing proportion of coarse aggregate and new aggregate is not good, the mixing proportion can be adjusted if the mixing proportion of coarse aggregate is not good. When the sand ratio is too large or too small. The sand ratio shall be properly adjusted to ± 1%. If the problem cannot be solved after adjustment with the above three measures, the plate shall be stopped immediately, and the relevant person in charge shall jointly analyze the causes and take measures in time to avoid economic losses caused by poor concrete quality.

,自上料搅拌车混凝土配合比不对的现场调整方法，混凝土配合比是每个搅拌站的技术核心，一些新建的混凝土搅拌站，可能对于这点并不是很了解，希望本网这篇文章，可以让您对混凝土配合比的设计原则有所了解，对常见的一些混凝土生产配合比有所参考依据，也能在您生产混凝土出现问题时，关于配合比的如何调整提供一些帮助。

, since the on-site adjustment method of the wrong concrete mix proportion of the loading mixer truck, the concrete mix proportion is the technical core of each mixing station. Some newly-built concrete mixing stations may not know this very well. I hope this article on this website can let you understand the design principles of concrete mix proportion and provide reference basis for some common concrete production mix proportion, It can also provide some help on how to adjust the mix proportion when you have problems in concrete production.