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Concrete waste that is rich in alkaline calcium compounds can be used to remove and recover various elements from an aqueous solution. Waste concrete has been used as a sorbent to remove phosphorus from wastewater after the removal of excess sludge in sewage treatment plants. [27] Concrete waste may also be used as an inexpensive gas treatment ...
A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together. Cement is seldom used on its own, but rather to bind sand and gravel together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most ...
Bags of portland cement wrapped and stacked on a pallet. Blue Circle Southern Cement works near Berrima, New South Wales, Australia.. Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.
a bench (weight training) is used for fitness exercises, such as the bench press which is named after its use of a bench; a communion bench is not used as a seat; a piano bench usually offers one person seating, but there are also two-person variants allowing for pair-playing; swing seats are independently movable, suspended benches, used for ...
Metalworkers need benches built to handle grinding, welding, light casting and forging, and layout. Most of these benches include a metalworker's vise mounted to the top. Gardening Gardener's benches must be resistant to moisture and dirt. They are used for potting, seeding, and grooming, and usually have built-in shelving and storage. Electronics
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