, 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?

,自上料攪拌車混凝土配合比的設計原則、配比參考及現(xiàn)場調整：攪拌站混凝土配合比設計方法時可遵循3個原則：水灰比，水灰比只要符合設計要求就行，在允許范圍內都可以取值；用水量，用水量其實反映的是漿骨比參數(shù)。用水量越大，用灰量也越大，混凝土里面的漿體總量也越大。

, 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.

在保證混凝土強度和工作性的前提下，盡量少用水、少用灰，多用骨料，這樣才能減小混凝土的收縮開裂，保證混凝土的體積穩(wěn)定性；砂率，即砂石比例。砂率越大，混凝土的彈性模量就越低。

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.

,自上料攪拌車混凝土配合比不對的現(xiàn)場調整方法：對于混凝土攪拌站而言，隨時都會有機器故障、混凝土配合比不對的可能，所以在混凝土攪拌站運行時，我們需要在發(fā)現(xiàn)配合比不對時就及時做出調整。

, 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.

那么現(xiàn)場如何調整混凝土配合比呢？攪拌站混凝土配合比設計方法時可遵循3個原則：攪拌站常見標號的混凝土配合比參考；以下數(shù)據(jù)僅供攪拌站企業(yè)參考，以1立方為標準；C15：水泥強度配合比；32.5Mpa 卵石混凝土 水泥富余系數(shù)1.00 粗骨料大粒徑20mm 塔羅度35~50mm每立方米用料量： 水：180 水泥：310 砂子：645 石子：1225 配合比為：0.58：1：2.081：3.952 砂率34.5% 水灰比：0.58；C20： 水泥強度配合比；水：175kg 水泥：343kg 砂：621kg 石子：1261kg 配合比為：0.51：1：1.81：3.68；C25：水泥強度配合比水：175kg 水泥：398kg 砂：566kg 石子：1261kg 配合比為：0.44：1：1.42：3.17C30：水泥強度配合比32.5Mpa 卵石混凝土 水泥富余系數(shù)1.00 粗骨料大粒徑20mm 塔羅度35~50mm每立方米用料量：水：190 水泥：500 砂子：479 石子：1231 配合比為：0.38：1：0.958：2.462 砂率28% 水灰比：0.38攪拌站常見標號的混凝土配合比參考。

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.

現(xiàn)場坍落度超出配合比設計坍落度的限制時（±20mm）對砂石料含水率重新進行測定，對配合比進行校正，如果含水量實測、計算沒有錯誤時，可以將減水劑摻量增加或減少0.05～0.1%進行調整。當新拌混凝土有泌水現(xiàn)象時，如果不是外加劑和膠凝材料的適應性的問題時，可以調整粗骨料的摻配比例，將級配調整到較佳，切不能套用固定摻配比例。當砂率偏大或偏小時。將砂率進行適當調整，調整比例為±1%。當用以上3項措施調整以后仍不能問題時，應立即進行停盤，由相關負責人共同分析原因及時采取措施，避免生產(chǎn)的混凝土質量不佳造成經(jīng)濟損失。

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.

,自上料攪拌車混凝土配合比不對的現(xiàn)場調整方法，混凝土配合比是每個攪拌站的技術核心，一些新建的混凝土攪拌站，可能對于這點并不是很了解，希望本網(wǎng)這篇文章，可以讓您對混凝土配合比的設計原則有所了解，對常見的一些混凝土生產(chǎn)配合比有所參考依據(jù)，也能在您生產(chǎn)混凝土出現(xiàn)問題時，關于配合比的如何調整提供一些幫助。

, 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.