Natural sand vs Artificial sand

Project Background

Comparison of natural sand and artificial sand:Compared with natural sand, artificial sand has the following differences and advantages: the material of artific

Comparison of natural sand and artificial sand:

Compared with natural sand, artificial sand has the following differences and advantages: the material of artificial sand washing is excellent and stable. Artificial sand washing is a artificially selected raw material. The material is uniform and stable. The mineral composition and chemical composition are consistent with the raw material. It is not as complicated as natural sand. The grit is clean, free of mud and other harmful impurities, and stable performance. Good particle size grading. A kind of artificial sand washing, a fineness modulus, corresponding to only one gradation. Its fineness modulus has a linear relationship with the sieve balance of a single screen. As long as the linear relationship is established through measurement and the sieving balance of a single sieve is measured, the fineness modulus can be accurately and quickly obtained. In general, natural sand, a fineness modulus, can have multiple gradations. The fineness modulus can be controlled artificially through the production process, and the production is organized according to user requirements, which is not possible with natural sand.

Prospects for artificial sand

How does artificial sand and natural sand affect the strength of concrete?

Natural sand has been used as a building material for thousands of years. Its quality and stability have also been recognized by everyone, and its impact on the strength of concrete need not be said. However, natural sand is often mixed with harmful substances such as chloride ions, sulfides and sulfates, mud blocks, mica and the like during the formation process over many years. Among them, chloride ions, sulfides and sulfates will corrode the steel bars in the building, which not only greatly shortens the service life of the building, but these components will also affect the durability and resistance to concrete of the concrete. Impurities such as mica can affect the setting power and compactness of concrete. Mud blocks not only affect the solidification and durability of concrete, but also have a destructive expansion force on concrete, which will directly affect the structure of concrete.

Whether artificial sand is added to concrete is widely debated. The machined sand contains stone powder. Stone powder has two effects on the working performance of concrete. On the one hand, because the stone powder absorbs certain water and admixtures, the increase of the stone powder content will lead to an increase in the water demand of the concrete; on the other hand, for The less-graded mechanical sand can easily cause the segregation and bleeding of concrete. Appropriate stone powder can increase the consistency of the concrete and improve the workability of the concrete. In addition, the mechanical sand has a polygonal structure and has a larger specific surface area. These properties are conducive to improving the strength and volume stability of concrete. Properly increasing the particles of 0.15-0.3mm and 0.3-0.6mm in the machined sand is more conducive to improving the workability of the machined sand concrete.

Finally, natural river sand as a non-renewable energy, if it is used endlessly, there will be a day of exhaustion. The selection of mechanical sand not only delays the process of resource exhaustion, but also protects the environment. The substitutes are the general trend of social development.

What are the characteristics of high quality machine sand?

There are two main characteristics that affect the quality of machined sand. First, the quality of the sand needs to meet the end use. To ensure this, we look at indicators such as the gradation curve and particle shape. The grading curve indicates how much material belongs to a certain granularity level. The shape measurement is carried out by studying the aspect ratio of the single particle and determining the percentage of the (material shape) oversized material. The flow cone device is also usually used to indirectly measure the mass of sand to obtain the fluidity and porosity of the sand.

We can then adjust the crusher and shaker to ensure that the grading requirements are met. When designing and selling the production scheme of mechanical sand, we also need to consider the end-user sand demand. For example, if sand is used to make concrete, the percentage of ultrafine powder must be carefully checked, that is, materials smaller than 74 microns. High-quality sand suitable for making concrete should have a non-flaky structure with rounded corners to ensure a low sand void ratio. In addition, the material cannot be active rock, otherwise it will cause cracking of the concrete, resulting in corrosion of the reinforcing steel and loss of strength performance of the concrete, thereby shortening the service life of the concrete structure. The second characteristic of high-quality machined sand is that the quality can be kept stable, otherwise the end user can neither guarantee the output of stable and high-quality concrete, nor can it optimize the concrete formula.

What advantages can the SBM solution bring to the machine sand producer?

In the production of machine-made sand, what is important is the process flow of the production line. This requires skilled combination of different equipment into an optimized production process. Cooperation with SBM starts with checking the customer's process and then determining the best equipment for the customer. Aggregate producers need certain products with a certain gradation, and we will propose a production system that will allow them to achieve the desired results.

To make this suggestion, we must understand the characteristics of the rock. Therefore we conduct a thorough rock test to determine the required equipment specifications to achieve the desired end result. These requirements are related to the material properties of the rock, including its hardness and abrasiveness, and the effect of moisture content on the material. SBM equipment, such as Barmac B-Series (VSI) vertical shaft impact crushers or SBM air classifiers, focus on continuously maintaining product quality to produce consistent finished sand.

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