At present, with the rapid development of society and infrastructure, the application range of manufactured sand is becoming more and more extensive. Ordinary machine-made sand can be used as aggregate for concrete, used to make various building structures, and can also be used as cement products, filling materials for pavement construction and maintenance, glass raw materials, etc. But the development has also brought a lot of construction waste. With the advancement of science and technology, the development of sand making equipment has realized the reuse of construction waste, and it is reused in the construction industry after crushing. After bricks, stones, concrete and other wastes are crushed, they can be used for masonry mortar, plastering mortar, etc.; After crushing, the waste bricks are used as aggregates for building panels to make partition panels, which are not only light in weight, high in strength but also sound insulation; After the waste concrete block is crushed, it can be used as aggregate in concrete cast-in-place or prefabricated components.
The sand from construction waste is similar to ordinary machine-made sand in some ways, but there are some differences. Construction waste sand making refers to the use of construction waste materials for recycling, through crushing, screening, washing and other processes, the construction waste is processed into sand and gravel aggregates. In contrast, ordinary manufactured sand is a sand and gravel aggregate obtained by manually or mechanically crushing natural ores.
The differences are mainly reflected in the following aspects:
Raw materials**: The raw materials for construction waste sand making are construction waste, including concrete, bricks, tiles, etc., while the raw materials of ordinary machine-made sand are natural ores, such as river sand, mountain sand, etc.
Environmental performance: construction waste sand making is an environmentally friendly material, through the reuse of construction waste, it is conducive to reducing the exploitation of natural resources and reducing environmental pollution. The production of ordinary manufactured sand may have a certain impact on the natural environment.
Physical properties: The physical properties of construction waste sand making may be affected by raw materials, such as strength, particle size distribution, etc. may be different. The physical properties of ordinary machine-made sand are relatively more stable.
Advantages of construction waste sand making:
Resource reuse: construction waste sand making makes use of construction waste, realizes the reuse of resources, and is conducive to reducing the exploitation of natural resources.
Environmental protection and energy saving: The production process of construction waste sand making reduces the damage to the natural environment, which is in line with the concept of sustainable development and is conducive to environmental protection.
Cost savings: Compared with the use of natural sand and gravel aggregates, the production cost of sand making from construction waste may be lower, which is conducive to reducing construction costs.
What are the benefits of sand making building for construction waste sand making?
1.Environmental protection.
The sand making building practices the design concept of low-cost and pollution-free sand making, and the dry sand making method adopted does not require water, and there is no sewage and sludge generation at the sand making site.
2.Mechanization.
The mode of prefabricated building is adopted, and the factory is used for high-precision production in the early stage, and the product production is controlled by high-tech production equipment; The on-site construction is operated by mechanization, which reduces the error of manual operation, the quality is more guaranteed, the construction is safer, and the construction efficiency is increased by 4-5 times.
3.Intelligent.
The intelligent control system is adopted, and through the unique algorithm and control, it ensures that the gradation of the finished sand is continuously adjustable, the fineness modulus is adjustable, and the stone powder content is controllable. Highly intelligent production, fault alarm, one-key start and stop, and the production process can be automatically executed.
The dry sand making industry has been deeply cultivated for more than ten years, and has produced V8 dry sand making building and V9 dry sand making building, which are mainly used to produce high-quality machine-made sand.
1.The vertical shaft sand making machine adopts a five-hole impact rotor structure, based on the centrifugal crushing method of "stone on-stone", and crushes, shapes and grinds the raw materials entering the crusher through the rotor, which effectively improves the particle shape of the finished sand and improves the generation of fine aggregates.
2.The air screening technology can complete the effective classification of over-limit particle size, finished sand and stone powder, improve the screening efficiency, and realize the adjustable fineness modulus of the finished sand through intelligent control.
3.The off-line ash cleaning pulse dust collector technology controls the content of stone powder in the finished sand, so that the system runs in a closed negative pressure environment as a whole, and realizes the value concept of green, environmentally friendly and intelligent sand making.
In general, there are certain differences between construction waste sand making and ordinary machine-made sand in terms of raw materials, environmental protection performance and physical properties, and the advantages of sand making buildings for construction waste sand making are mainly reflected in resource reuse, environmental protection and energy saving and cost saving.