We should reuse and recycle concrete
Products (aside from base course) are high quality aggregate, processed in steps with time and effort involved in crushing, pre-sizing, sorting, screening and contaminant elimination. The denominator is to start with clean; quality rubble in order to meet design criteria easily and ultimately yield a quality product that will go into end use.
Crushing and screening systems start with primary jaws, cones and/or large impactors taking rubble from 30 inches to 4 feet. A secondary cone or impactor may or may not need to be run, and then primary and secondary screens may or may not be used, depending upon the project, the equipment used and the final product desired. A scalping screen will remove dirt and foreign particles. A fine harp deck screen will remove fine material from coarse aggregate.
Further cleaning is necessary to ensure the recycled concrete product is free of dirt, clay, wood, plastic and organic materials. This is done by water floatation, hand picking, air separators, and electromagnetic separators.
And like concrete itself, old rebar is recycled into new. Incidentally, did you know that steel and concrete are among the most recycled materials in the world? The asphalt industry would have you believe asphalt is the most recycled material in the world, but the truth is that much of that recycling happens because asphalt pavements require complete demolition and reconstruction every 8-10 years. In sharp contrast, a comparable concrete pavement can easily last up to 40 years. As the professional manufacturer of complete sets of mining machinery, such as mobile crushing station, Henan Hongxing is always doing the best in products and service. vibrating screen:http://www.hxjq-crusher.com/40.html
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Concrete is made from granite aggregate, sand, cement, and water. While cement itself cannot be recycled, there has been increasing interest in recycling aggregate because of the environmental costs of mining the material and shrinking landfill space.
Concrete is an almost inert material. Because of its inert nature, but also because it cures to a solid form, it is ideal for using industrial by-products that otherwise would have been deposited in landfills. A stell mesh sunshade box of a building in the dusty industrial estate of Kranji Crescent has been hosting a steady stream of visitors from China, Mongolia, Israel and France over the past four months.
Concrete is made from granite aggregate, sand, cement, and water. While cement itself cannot be recycled, there has been increasing interest in recycling aggregate because of the environmental costs of mining the material and shrinking landfill space. Currently, recycled aggregate is mainly used to line the bottom of roads and cast into road kerbs, rather than used in building structures, due to concerns about its strength.
Recycling concrete is a smart and environmentally-conscious choice that saves resources. With in-place recycling, the recycling process has become even more cost-effective, too!
In-place concrete recycling reduces construction costs because a contractor doesn’t have to locate a recycling center or pay for trucking the materials away. This saves money for taxpayers and agencies.
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