What is the difference between the concrete after the concrete pouring and the mixing of concrete
The loading sequence of mechanical mixing concrete has a method of feeding and secondary feeding A feeding method refers to join the stones in the hopper, first add - fell for the type of cement and sand mixer, need to first add some water in the cylinder, and then gradually add water; In the case of a strong mixer, because the lower part of the material is lower, the water should not be added, and the water should be distributed slowly and evenly.
The uniformity, mixing degree and solubility of mixing are not equal to the stirring of mixer. In the same case, the firmness and hardness are smaller than the machine stirring. And the person's individual factors (such as mixing, longer or harder some stirring strength in front of the foot, etc.) also make the mixing of concrete quality difference is bigger, at the same time, the problem of casting after more, likely a pillar of several kinds of compactness and hardness.
A feeding method refers to join the stones in the hopper, first add - fell for the type of cement and sand mixer, need to first add some water in the cylinder, and then gradually add water; In the case of a strong mixer, because the lower part of the material is lower, the water should not be added, and the water should be distributed slowly and evenly. Secondary feeding method divides ready-mixed cement mortar method, net ready-mixed cement slurry and cement coated sand method, feeding sequence respectively 1 method: sand + + water into cement mixing, add the stones. Method: cement and water pour in stir to add sand and stone. 3 method: all stones, sand and 70% water will be mixed for 10 to 20 seconds, then add all cement and stir for 30 seconds, then add the remaining 30% water for 60 seconds. Artificial mixing is not recommended to use first put the sand cement mixture, add stones and finally dig the dump into the trough, and add half water, then add the other half of water.
