High quality pavement raw material products are composed of many base materials, and there are many kinds of pavement raw materials. Different pavement raw material products are suitable for different application scenarios. Today, let's introduce several types and characteristics of high-quality pavement raw material products.

1. Sand and gravel materials of quality pavement raw material products

Sand and gravel materials refer to the artificially mined rock or rolled granular gravel, as well as the loose granular material of the surface rock of the earth's crust after natural weathering.

This kind of high-quality pavement raw material product is the most used material in road and bridge engineering structures. The block stone with large size can be directly used for building road, bridge engineering structures and auxiliary structures after processing; Rolling crushed stone with stable performance can be made into asphalt mixture or cement concrete.

2. Industrial waste residue of quality pavement raw material products

Industrial waste slag is the general name of iron slag, steel slag and furnace slag used as road building materials. It mainly includes the waste slag and fly ash discharged from thermal power plants, the by-product metallurgical slag formed by the combination of fusible silicate in ore, fuel and cosolvent in the metallurgical production process, and the residual waste slag and coal gangue after coal cleaning in the coal industry. After processing, fly ash and metallurgical slag can be used not only as cement raw materials, but also directly as pavement raw material products, but also as admixtures in cement concrete and asphalt mixture.

3. Inorganic binder of quality pavement raw material products

Lime and cement are the most commonly used inorganic binders in road and bridge engineering. Cement is the main raw material of cement concrete, prestressed concrete structure and cement concrete pavement in bridge construction. Inorganic binder stabilized materials (including stabilized gravel, gravel, soil, etc.) are widely used in road pavement base structure. Cement (or cement, lime) mortar is an important binder for the masonry of various bridge masonry structures.

4. Organic binder of quality pavement raw material products

Organic binder mainly refers to asphalt materials, such as petroleum asphalt, coal asphalt, etc. This kind of material and gravel, stone chips and sand with different particle sizes (sizes) form asphalt mixture, which can be used to build various types of pavement raw materials. Asphalt mixture is a very important pavement raw material product in modern pavement construction.

5. Earth pavement of quality pavement raw material products

Soil is the material on the surface of the earth's crust. It is all loose materials with different particle sizes and without cementation formed in the process of long-term weathering, transportation, abrasion and sedimentation. Soil can be used not only as subgrade material, but also as the main material of inorganic binder stabilized base course.

6. High polymer pavement raw materials of quality pavement raw material products

High molecular polymer refers to high molecular organic matter polymerized by one or several low molecular compounds (monomers). High molecular polymers commonly used in road and bridge engineering include plastic, rubber and fiber. With the development of China's chemical industry and high-grade highway, more and more high molecular polymers are used in road and bridge engineering. Engineering polymer is mainly used to improve the performance of asphalt mixture or cement concrete, the structural performance of subgrade or pavement in road and bridge engineering.

7. Steel and wood of quality pavement raw material products

Steel is an important material for bridge steel structure and reinforced concrete or prestressed reinforced concrete structure. This course focuses on the technical properties and applications of linear steel. Due to the shortage of wood resources, in addition to rush repair works and temporary works in forest areas, wood is less used for building bridges and culverts, mainly used as formwork and support for cement concrete works