What is the difference between "sand" and "grit"? You should know some scientific knowledge!

1. What is the difference between "sand" and "grit"?

1. "Sand" is used to describe sand with relatively fine particle size, and is mostly used in writing and literature. "Sand" refers to sand with a larger particle size, and is mostly used in more rigorous scientific research. For example: "beach", "desert", "hourglass", "flying sand and running stones", etc.; "Sand" is used for concrete mixing in civil engineering (regardless of the particle size). Reference: "Modern Chinese Dictionary"

2. Sand and sand are similar in meaning, both refer to granular stones and other materials with similar shapes. However, sand and sand have different meanings. Generally, sand refers to naturally formed stone particles, such as river sand and beach sand. Sand refers to stone particles formed by crushing ore.

The differences are as follows:

1) From the Chinese perspective: "Sand" means "loose stone particles in water". Generally, fine granular loose stones obtained from water or related to water are all represented by "Sand", such as "mud and sand", "beach", "sand spring", etc., but "desert" is different. "Sand" means "finely broken stones", and generally refers to materials that are finely broken like sand.

2) Literally speaking, the two are different, one is related to water and the other is related to stone.

3) Sand can be processed by artificial machinery, but sand cannot.

3. In English, both are written as sand, with no difference.

"Sand" often appears in our daily life, such as desert, beach, sandstorm, etc., while the word "sand" appears relatively less frequently. Sometimes we see "river sand" written in an article, document, or circle of friends. Is it a typo? Or is there another way? So what is the difference between the two? Let's learn about it together.

"Sand": usually refers to very fine stone particles, related to nature, weather, and meteorology. For example: sandstorm, sandstorm, desert, beach, etc. "Sand" can be blown up by the wind because it is very fine. If it is related to sound or the sound is not loud, use "sand", hoarse, hoarse throat, rustling sound, rustling sound, etc.

"Sand": usually refers to finely crushed stone, usually a building material. In construction, it is called fine aggregate, and can be divided into coarse sand, medium sand, and fine sand according to different diameters. "Sand" is used when it is related to engineering, minerals, and manufacturing. For example: cement mortar, corundum, cinnabar, sandpaper, grinding wheel, river sand, mountain sand, and sea sand. It generally refers to materials that are finely crushed like sand, such as sugar, casserole, etc.

Sometimes in daily usage, the two words are used interchangeably, for example: river sand (河沙), sand dredging ship (砂挖山), sand grains (沙粒), etc.; but in some cases the two words cannot be used interchangeably, for example: cement mortar, cannot be written as “水泥沙沫”; sandstorm, cannot be written as “沙尘暴”.

"Sand" can be divided into natural sand and artificial sand. Natural sand: rock particles with a particle size of less than 5mm formed by natural conditions (mainly rock weathering) are called natural sand. Artificial sand: (artificial sand) is formed by crushing stones. Natural sand is washed by water and river, so it feels fine. Everyone knows natural sand, but what is artificial sand?

2. What is machine-made sand?

Artificial sand refers to the finished product that has been processed through multiple steps by a sand making machine or other special sand making equipment. Its characteristics are good particle shape of the finished product, and during the operation process, different equipment can be selected according to different material requirements to generate various specifications of artificial sand.

Characteristics of machine-made sand

1. Solidity and durability test: The solidity of machine-made sand is slightly worse than that of river sand, but it still meets the standard indicators of superior products and can be used in ordinary concrete without any problems. However, when it is used in concrete components that are often subjected to friction and impact, in addition to the addition of admixtures, the lime-sand ratio of the concrete, the crushing index of the sand, and the stone powder content should also be controlled.

2. The influence of artificial sand and stone powder content on the performance of cement mixture: Through cement tests, mortar tests, and concrete tests, there is no big difference between using artificial sand to prepare concrete and using natural sand. Generally speaking, under the premise of the same slump, the water consumption of artificial sand is slightly larger, but it should be considered according to construction conditions, structures, transportation and other factors.

However, the strength of the concrete remains basically unchanged. When using machine-made sand to prepare special concrete such as pumping concrete, be careful not to make the sand ratio too high to avoid reducing the engineering quality such as concrete strength and durability.

In the process of engineering construction, sand and gravel, as an important component of concrete structural materials, have a significant impact on the quality and durability of the entire project.

On the premise of meeting the sand performance indicators, an economically feasible solution should be selected to meet the construction quality requirements and effectively control the production costs. In this way, in areas where natural sand resources are scarce, the use of high-efficiency impact crushers or impact crushers combined with professional screening equipment can produce high-quality machine-made sand. Concrete construction operations are not only feasible, but also can bring significant economic benefits.