How is Concrete Crushed and Screened?

How is Concrete Crushed and Screened?

Zhengzhou, China (prHWY.com) May 9, 2012 - Concrete is a composite construction material composed primarily of aggregate, cementand water. There are many formulations that have varied properties. The aggregate is generally coarse gravel or crushed rocks such as limestone, or granite, along with a fine aggregate such as sand. The cement, commonly Portland cement, and other cementitious materials such as fly ash and slag cement, serve as a binder for the aggregate. Various chemical admixtures are also added to achieve varied properties. Water is then mixed with this dry composite which enables it to be shaped (typically poured) and then solidified and hardened into rock-hard strength through a chemical process known as hydration. The water reacts with the cement which bonds the other components together, eventually creating a robust stone-like material.

Concrete is one of the most important materials for civil construction. With the acceleration of urbanization, people have raised higher requirements for concrete quality. And since the demand of sand aggregate of our society is increasing rapidly, it is necessary to process waste concrete into new concrete aggregate to solve the problem of aggregate lack.

Concrete is firstly crushed into large concrete materials, and then transported by a truck to stock ground which is normally situated near the reconstruction project in order to save transport cost. The concrete materials are then crushed by jaw type crusher and cone crusher, and screened by vibrating screen.impact crusher:http://www.hxjqchina.com/product-list_12.html
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For cement concrete pavement recycle, at least 75% of the materials should be crushed into small grains. The surface of the pavement concrete should be reduced into grains less than 7.5cm in size, the interlayer of the pavement concrete into grains less than 22.5cm in size, and the basement materials into grains less than 37.5cm in size. In order to control crushed concrete granularity, you will need screening equipments to separate coarse particles from the product. grains of required size are moved to the following process, while the large one will be sent back to concrete crushers for further crushing.

In order to satisfy the market demand for used concrete screening equipment, crusher has developed its own series of vibrating screens for concrete recycle. Crusher has more than 30 years of experience in designing and constructing mining and construction equipments, and our concrete aggregate screening equipment of international level has occupied great market share as a result of its advantages like high efficiency, high reliability, low noise, and low consumption. The sieve pore size ranges from 3-50mm to 5-150mm, and its processing capacity from 7.5t/h to 700/h.

Apart from the stationary vibrating screen, we also provide you with portable crushing and screening plant of international level which is more flexible and combines crushing and screening process together by one single machine. It is favored by our customers for the integrality, flexibility, lower production cost and reliable performance.

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