What is the sequence of feeding of concrete
The loading sequence of concrete is pea-cement - sand - water. Of raw materials mixing barrel in order, should be comprehensive consideration can ensure the quality of concrete for turn, improve the strength of concrete, reduce mechanical wear and tear, reduce the cement dust, improve productivity and other factors. The method can be divided into a second method of feeding method.
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 method of the second feeding method, the pre-mixing mortar and cement mortar method, the cement mortar method and the cement wrapping method, the loading sequence is respectively one Method: cement + sand + water to stir and add pebbles. 2 Method: cement and water pour in stir to add sand and stone. 3 Method: all stones, sand and 70% water will be poured for 10 to 20 seconds In 30 seconds, add the remaining 30% water for 60 seconds.
General quality of concrete is the most favorable way of feeding is first sand and gravel aggregate, powder, cement, mineral powder and fly ash), and at last the water and admixture, but generally on the program set at the same time after application will add water and admixture.
