Recently, the relevant industry associations in Shanghai released the "2021 Shanghai Construction Sand Market Report". The total use of construction sand in Shanghai in 2021 reached 52.752 million tons, an increase of 32.7% compared to 2020. Among them, the use of natural sand decreased by 40.7% year-on-year, and the use of machine-made sand increased by 1329.2% year-on-year.
Machine-made sand has become the mainstream application of concrete fine aggregate. In 2021, the average price of sand in natural sand will increase by 40% month-on-month, and the average price of sand in machine-made sand will increase by 21% month-on-month. Compared with the average price of natural sand in 2019, the average price of sand in natural sand increased by 39%, and the average price of sand in mechanism increased by 34%.
Machine-made sand production
Machine-made sand has been recognized by the construction industry in Shanghai. Shanghai can be said to be an area with extremely strict management and use standards for construction sand. Guangzhou, which is also a first-tier city, saw a significant year-on-year increase in the use of machine-made sand last year. The achievements and breakthroughs in the application of artificial sand will play an extremely important demonstration role in the promotion of the application of artificial sand in the country.
Machine-made sand has gradually replaced natural sand and has become the mainstream of concrete fine aggregate, but it does not mean that machine-made sand can be used to mix concrete. The market prospect of machine-made sand is very broad, which is for high-quality machine-made sand.
To produce high-quality machine-made sand, we must first ensure that the physical and chemical indicators of the parent rock meet the standards. For example, weathered rock is generally avoided, and the parent rock is qualified. Generally, the hardness of the produced machine-made sand will meet the standard used. In addition to the requirements of the parent rock, there are higher requirements for the particle shape and gradation of the machine-made sand.
Grain size advantage
First of all, the grain shape, as the name suggests, is the particle shape of the machine-made sand. The high-quality machine-made sand is generally similar to a cube. The machine-made sand of the cube has more bonding surfaces, which can improve the locking force between particles and enhance the performance of concrete. .
Grading advantage
Besides gradation, gradation is the ratio of coarse and fine sand. According to the fineness modulus, machine-made sand can be divided into coarse sand, medium sand, and fine sand. Generally, the proportion of medium sand is the highest, and the proportion of coarse and fine sand is relatively small. Reasonable gradation, low porosity and high density of sand, and good strength and durability of concrete.
To make the grain shape excellent and the gradation reasonable, the key lies in the production and processing equipment of machine-made sand. In the production of artificial sand, the key is the Sand Making Machine.
Bellian Mining Machinery Manufacturer VSI Impact Sand Making Machine
HVI sand making machine, multi-purpose, can make sand and shape. In the production process, stone hits stone, stone hits iron, multi-directional impact friction, greatly reduces the content of needle-like sand, and the grain shape is more three-dimensional and full.
VSI sand making machine has a variety of grading adjustment processes, the fineness modulus can be controlled, and the proportion of coarse, medium and fine sand is reasonably distributed, making the grading more excellent.
Bellian Mining Machinery Manufacturer VSI Impact Sand Making Machine
VSI sand making machine is easy to maintain, low energy consumption, the maximum throughput can reach 500 tons per hour, and the sand quality is high, which can be used in the trillion-dollar infrastructure market.
