From the current situation of highway construction in my country, the contradiction between the supply and demand of sand for concrete is particularly prominent, and there is even no sand supply at the peak of sand use, which seriously affects the progress of engineering construction. Secondly, with the rapid development of highway concrete technology, modern highway bridge concrete has higher and higher technical requirements for sand. Especially high-strength and high-performance concrete has strict requirements for aggregates, which can meet its requirements. The amount of sand is getting less and less, or even there is no, so the position of artificial sand and gravel in construction projects is getting more and more important, becoming an important source of construction sand and gravel. Therefore, it is imperative to vigorously develop the application of artificial sand and gravel aggregates in construction projects. Then, what equipment is used to produce sand-gravel concrete aggregate for highway pavement construction?

Zhejiang Lizhi Machinery, as a professional manufacturer of sand making equipment, introduces the production of sand and gravel concrete aggregates that are suitable for high-speed (high-grade) highway pavement construction.

The construction of expressways (high-grade highways) puts forward high requirements on the shape and gradation of concrete sand and gravel aggregates, especially the needle-like content of basalt (diabase) gravel, the former simple cone crusher or The impact crushing processing technology can no longer meet the requirements. Our company has launched a new crushing and screening process for crushing and shaping by a new sand making machine that can well meet various technical requirements; the new sand making machine is to produce high-performance concrete aggregates and high-quality The necessary equipment for stone materials can fully meet the technical requirements for producing high-performance concrete aggregates for expressways.

Artificial sand and gravel aggregate process: the materials (limestone, marble, granite, etc.) enter the coarse crushing equipment through the feeder, and the coarsely crushed aggregate enters the fine crusher for secondary crushing and shaping, and then is conveyed to the screen by the belt conveyor The sub-device performs aggregate grading, and after meeting the required finished aggregates, the excess and unqualified aggregates are sent to the sand making equipment, and the aggregates crushed by the sand making machine are transported by the belt conveyor to the screening workshop again Classify. In this way, the medium crushing device, the sand making device and the screening device form a closed loop, and the future material is processed into the required finished sand aggregate. The production of artificial sand and gravel materials can be produced by dry or wet methods. In consideration of environmental protection and water saving, the classification of sand can be classified by a winnowing machine, which is conducive to environmental protection and adjustment and control of stone powder content at any time.

The new sand making machine is applied in the whole artificial sand aggregate process, and the technology is more mature. The re-adjusted internal structure makes the operation of the crusher safer and more stable, and improves the production efficiency and environmental protection to a new level. In order to continuously meet the ever-increasing economic development, the application of large-scale equipment appears to be more extensive. When automation and environmental protection conditions are met, more efficient and capable crushing machinery has become the main trend of customers when choosing. The new-type sand making machine of Liming Heavy Industry's sand and gravel aggregate production equipment can easily choose the full center and waterfall methods in the feeding system. In terms of the crushing principle, you can choose the two methods of "stone hitting stone" and "stone hitting iron". The actual conditions of materials can be adjusted conveniently, which greatly improves the production capacity.