A, gravel introduction:
Gravel refers to the granular rock material obtained by mechanical extrusion or artificial crushing of natural rock. It is a common building material and widely used in different engineering fields.
Second, the preparation method of gravel:
Mechanical rolling method is to use mechanical equipment such as crusher and ball mill to crush rocks and get the required crushed stone specifications. For larger rocks, they can be broken into appropriate sizes by blasting, and then selected and graded to obtain crushed stones. Use artificial forces, such as hammers and chisels, to break the rocks and get the needed gravel.
Three, the classification of gravel:
According to different purposes and specifications, crushed stones can be classified, and according to different particle sizes, crushed stones can be divided into fine aggregate, medium aggregate and coarse aggregate to meet different engineering needs. According to the composition and properties of rocks, crushed stones are divided into granite crushed stones, limestone crushed stones and basalt crushed stones, which are used for different engineering requirements.
Four, the application of gravel in building engineering:
Gravel can be used as road base and subbase materials to provide good bearing capacity and drainage performance, and ensure the stability and durability of roads. Gravel can be used as aggregate of concrete, which can increase the strength and compressive performance of concrete and make it suitable for various building structures. Gravel can be used as ballast material of railway track, which provides good support and load dispersion ability and ensures the smooth operation of railway line.
Verb (abbreviation of verb) Note:
According to the specific requirements of the project, choose the appropriate gravel specifications to ensure the construction quality. Gravel will produce certain dust in the process of extrusion or crushing, so corresponding measures need to be taken for protection and treatment. For the project using gravel, it is necessary to carry out corresponding quality inspection to ensure that the gravel meets the relevant standards and requirements.
Summary of intransitive verbs:
Gravel refers to granular rock material obtained by mechanical rolling or artificial crushing of rock. Widely used in construction engineering, road foundation, railway engineering and other fields. The preparation methods of crushed stone include mechanical rolling, blasting and artificial crushed stone. Gravel can be classified according to its particle size and composition.