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Aggregate may be the needed material in highway, railway and roal building. Aggregate could be a broad quantity of coarse particulate materials in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Sources to produce aggregate may be arranged into three primary areas: mining of mineral aggregate deposits, including sand, gravel, and stone using waste slag within the development of iron and steel and recycling of concrete, that’s itself chiefly produced from mineral aggregates. In addition, you will find some (minor) materials which are used as niche lightweight aggregates: clay, pumice, perlite, and vermiculite.

In the wake of the development of social infrastructure construction, a great many industrial departments put higher demands for the grinding granularity of solid mineral aggregate or even up to several microns. Such fine and ultrafine granularity raises higher requests for grinding machine. At the same time, milling technology is also experiencing huge challenges, and research work about technological process and equipment improvement is working away.

When the demands for product granularity become increasingly higher, the particle characteristics have essential changes. For small particle, its macroscopic and microcosmic crack is larger than the large particle. For fine particle, high contract pressure contributes to non-elastic deformation; the smaller the particle is, the higher the intensity.

Because the traditional grinder always grind material in gravitational field, impact force is not enough to meet the demands for further crushing of fine particle; therefore, there are problems to finish the task of fine crushing and ultrafine crushing. Due to the existing of the gravitation field replaced by many times of the gravity acceleration and high-speed impact grinding, we has successfully develop centrifugal mill, planet type grinding machine, vibrating mill, stirred mill, jet milling and high-speed mechanical impact type mill. To a service-oriented brand integrity,As the professional manufacturer of complete sets of mining machinery, like classifiers, Henan Hongxing is always doing the best in products and service.cement making plant:http://www.china-hxjq.com/p75.html

Aggregates themselves may be recycled as aggregates. Unlike deposits of sand and gravel or stone suitable for crushing into aggregate, which can be anywhere and could require clog removal and/or raging, “deposits” of recyclable aggregate are frequently concentrated near urban centers, and production from their site cannot be elevated or decreased to satisfy fascination with aggregates. Way of getting recycled aggregate depends on physical decay of structures additionally for their demolition. The recycling plant may be fixed or mobile the higher compact capacity mobile plant utilizes asphalt-aggregate recycling. The fabric being recycled is generally highly variable in quality and qualities.

An important property of aggregates is the internal pore characteristics. What make up this characteristic are the absorption, porosity and permeability of the aggregate. The size, number and continuity of the pores has an effect on its strength, its resistance to abrasion, texture of the surface, gravity, bonding capabilities as well as its resistance tofreezing and thawing. The ratio of the volume of the pores to the total volume of the particle is what makes up the porosity. Absorption is the particle’s ability to absorb water. Permeability is the particle’s ability to let water pass through it.