Research On Concrete Multistep Mixing Technology

Compared with traditional mixing technology, concrete multistep mixing technology have improved the concrete intensity by a large margin under the same hardness terms, and saved cement consumption under the intensity condition of the equal concrete etc. It is not merely suitable for the mixing of the ordinary concrete, especially suitable for the mixing of high-performance concrete in the concrete structure of large span, such as the high-speed passenger traffic railway, superhighway etc.This paper analyze the principle of concrete multistep mixing technology, and establish the reconstructive blue print of prior concrete mixing equipment according to characteristic of multistep mixing technology. Reconstructive the mechanical part of the prior concrete mixing equipment in order to be suitable for multistep mixing technology and improving the mixing quality and efficiency. Confirm the structure form and parameters of the aggregate batching systems, power batching systems, liquid batching system according to the theory analysis and different material. Establish the shift concrete mixer 'structure, driving model and reference spare parts; adopt advanced batching instrument combine with worker's accusing of machine to realize supplies thick to mix and not precise to buy, the step by step, order of setting up different supplies feeding the automatic technological process of material, adopt the technology of frequency conversion to change speed to control the concrete mixer on the basis of carrying on analysis and research into the electric part of concrete mixing equipments, especially various in style, with high precision, measure and fast to weighing the supplies etc. Obtained the mixing rule of feeding by many steps to verify the exactness of the analytical method by carrying on research into the technology method with the model experiment, The on-the-spot experiments and model experiment all verify: The performance of the concrete has corresponding relation with its producing and mixing the method, have certain corresponding relation to enter the order of the mixer with concrete each component, the same material adopts the same match ratio, different mixing technologys, the quality of concrete mixing matter is different. Concrete multistep mixing technology is more suitable for the mixing of concrete.