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Sand is a loose, fragmented, naturally-occurring material consisting of very small particles of decomposed rocks, corals, or shells. Sand is used to provide bulk, strength, and other properties to construction materials like asphalt and concrete.
A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust.. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more easily disposed of or recycled, or to reduce the size of a solid mix of raw materials (as in rock ore), so that pieces of different composition can be differentiated.
So getting right to it then, what type of foundation are we going to build for our flagstone patio: sand, cement, or gravel?. Short answer: well it depends. Quarry screenings (if available in your area) are generally best for under the flagstones.
Our Products. The building aggregates equipment of CBcrusher includes not only a series of single equipment of coarse crushing, intermediate and fine crushing, sand making and shaping, but also a batch of standardized design products of production line on the basis of many years of experience.