We often see bulldozers and graders on the construction site. We only know their names, but what are their specific uses and differences? Some people say that the bulldozer's block shovel is in front, and its main purpose is to carry and push materials in a short distance and spread them out. It has a wide range of applications. 

　　What is a grader? What are its functions?

　　The grader is a kind of mechanical equipment which uses the scraper blade installed between the front and rear axles and can lift, rotate and extend flexibly to carry out the ground leveling operation. Due to its special function, grader is widely used in agriculture, highway and construction engineering. It is often used to complete large area ground leveling, road construction, farmland improvement, slope scraping, earth pushing, snow removal and other work. The leveling accuracy is relatively high, but the strength is relatively small. For example, when making asphalt pavement, what kind of flatness gradient is required for the surface, the grader is more accurate. The bulldozer has high power and can push heavy earth and stone works and objects, such as stone filling embankment or earth and stone embankment to be preliminarily leveled by bulldozer. As a fast, efficient and multi-purpose construction machinery, graders play an important role in daily life.

　　What is a bulldozer? What are its functions?

　　Bulldozer is a kind of machine which is composed of tractor as the original machine and bulldozer with soil cutting blade; it is used to clear land, road structures or similar work. Bulldozer is a kind of engineering vehicle, which is equipped with a large-scale metal bulldozer in front. When using, put down the bulldozer, shovel and push mud, sand and stone forward. The position and angle of the bulldozer can be adjusted. Bulldozer can excavate, transport and unload soil independently, which has the characteristics of flexible operation, convenient rotation, small working face and fast driving speed. It is mainly applicable to the short-term transportation of the shallow excavation of class I to III soil, such as site clearing or leveling, foundation pit with small excavation depth and backfilling, and subgrade with small push height, etc.

　　For example, in the road construction, bulldozer can complete the treatment of subgrade base, add embankment with a height of no more than 1 m horizontally from the roadside borrow soil, excavate and transfer along the center line of the road, excavate and fill the subgrade for transporting soil, and build the subgrade with half embankment and half cutting according to the mountain borrow soil. In addition, bulldozers can also be used to level the site, pile up loose materials, remove obstacles in the operation area, etc.

　　It can be seen that the bulldozer is different from the grader not only in structure but also in use. The grader is mainly used for road surface or site leveling, and then used for compaction or other follow-up operations, and also for earthwork operations. However, due to the limitation of traction and blade capacity, the effect is far less than that of the bulldozer; Bulldozer is mainly used for earthwork operation, such as river excavation, earthwork short-distance moving. Leveling is also one of the functions of bulldozer, but its efficiency is not as high as that of grader.

　　To sum up, bulldozers are more widely used than graders.