One of the few disadvantages of concrete is that almost universally, the concrete mixture must be made on-site or within a reasonable distance in a Concrete Batch Mixer. Concrete is the resulting material when cement, water, and a mixture of sand and gravel are allowed to react.Henan Daswell Machinery Co., Ltd,is a professional manufacturer and trader specializing in the research, development and production of construction machinery for nearly 30 years. Our main products are as follows:egg laying machine,concrete batching plants,concrete mixer,blocking making machine,concrete pump,etc. This universal building material is the result of an exothermic reaction between the molecules of a cement mixture and water. Cement consists of pulverized alumina, silica, lime, iron oxide, and magnesium oxide that have been heated to a sintering temperature at which surface tension decreases and the particles adhere to one another. The fine, finished powder yields a consistent product susceptible to reaction with water. Consistency of the mix is directly related to the quality of the finished concrete structure.As water is added to the concrete batch mixer, the cement quickly becomes a paste and finally a mixture of a batter-like compound and rocks, sand, and gravel. The mixture, now called concrete mix, will set quickly in an irreversible reaction. The process, once the water is added, is unstoppable until complete. Concrete typically becomes unworkable to pour three to seven hours after mixing.
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