How to buy sand Sand buying tips?

What are the specifications of sand?

Sand can generally be divided into four types: extra-fine sand, fine sand, medium sand and coarse sand. The particle size of the sand is less than that is extra-fine sand, the particle size is fine sand, the particle size is medium sand, and the particle size is greater than that is called coarse sand.

Among them, Zhongsha is the most suitable for home decoration. Generally speaking, the coarser the sand, the higher the strength of the cement mortar, but if the strength is too high, it will also lead to some undesirable results, such as cracking of the ground leveled with it. The sand that is too fine does not have a strong adsorption capacity, and cannot produce large friction and stick to the tile.

Therefore, it is recommended to use medium sand in home decoration, and the particle thickness of medium sand is very suitable for use in cement mortar.

What are the classifications of sand?

According to **, sand can be divided into sea sand, river sand and mountain sand, as the name suggests, these three kinds of sand come from the sea, rivers and mountains.

1. Sea sand: Although the sea sand is clean, it has high salt content, which seriously corrodes the building and affects the quality. Sea sand often contains tiny shells of the ocean.

2. Mountain sand: due to the rough surface, the cement effect is good, but the composition of mountain sand is complex, and most of it contains soil and other organic impurities.

3. River sand: the surface roughness is moderate, and it is relatively clean, and contains less impurities. Generally, the sand purchased from the market has to be sifted before it can be used.

Among them, river sand is most suitable for home decoration. In architectural decoration, the state strictly prohibits the use of sea sand; However, mountain sand is not suitable for use due to more impurities; The only thing that is best used for home improvement is river sand.

How to buy sand for home decoration?

1. Look at the particle size: Generally speaking, the use of neutral sand for home decoration is better. Irregular coarse sand also requires labor-intensive screening, and too fine can also cause many problems.

2. Look at impurities: the less impurities should be guaranteed, the better. If there are impurities such as soil, dead leaves, etc., it will greatly increase the probability of hollowing and poor adhesion of the first tile.

3. Look at the specifications: it is best to use the same specification of sand for the same home improvement project, and there is no need for the owner to buy brand sand.

4. Check the sample: If there is a sample of the sand, you can grab a handful of sand with your hand and hold it tightly to make the sand a ball. Then put the sand in your hand back into the bag, and then shake off the remaining sand stuck on your hand, if there is still sand left in your hand, such sand can be used, if the residue is soil, so that the sand can not be used, the sand with too high soil content will affect the cohesiveness of the cement and weaken its hardness.

5. Look**: Whether it is natural sand or river sand, it must be screened after being bought before it can be used.

Of course, there are also sand that have been screened on the market, but ** is about 1 3 higher, and consumers should choose according to their own financial affordability.

6. Dosage calculation: According to the ratio required for construction, the capacity of the required sand can be obtained, so as to obtain the approximate weight of the sand. Take 10 square meters as an example:

The quantity of cement mortar 10 average thickness) = cubic meters. Then the amount of sand used = the weight of sand per cubic meter.

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Sand is made up of minerals and tiny rock fragments. Rock chips are rocks that have been eroded and weathered. The composition of the sand varies from place to place, depending on the local rocks** and conditions.

In inland (e.g., desert) and nontropical coastal (e.g., sandy) environments, the most common component of sand is silicon (silica SiO2). Typically, silicon exists in the form of quartzite. Feldspar sandstone is a type of sand or sandstone with a high content of feldspar (aluminum silicate) and is usually formed by weathering and erosion of nearby granite.

The fine white sand found in coral reefs is above-ground corals (limestone) that can pass through the digestive system of parrot fish. In some places, the sand contains magnetite, clay, chlorite, glauconite, or gypsum. Magnetite-rich sand has a deep black color.

Sand containing chlorite and glauconite is generally green in color. The gypsum dunes at the National Museum of White Sands in New Mexico are world-famous for their white color. In some areas, the sand layer contains garnet and other corrosion-resistant minerals, such as some gem ores.

The difference between sand and sand in this paragraph.

Sand, mostly artificially made, or artificially polished from some stones, the particles are relatively larger, the fullness is stronger, and you can clearly feel the presence of particles in your hand. The main purpose of making sand is to sharpen tools, make noises, or to use it as a timer. The sand is also ground by stone, but the grains of sand are polished by the forces of nature over thousands of years, and are so fine and soft that they fit into soft supplies.

The biggest difference is that the sand is different colors, and different types are produced in different places. If you hold a handful of sand in your hand, you can't feel the presence of particles, but if you bathe with sand, you can remove dead skin on the surface of the skin and polish it**. So, sand has many uses.

And the sand variety is single.

First, the appearance is rough, and no more useful strengths have been found except for polishing.

Sand, mostly artificially made, or artificially polished from some stones, the particles are relatively larger, the fullness is stronger, and you can clearly feel the presence of particles in your hand.

Difference with sand.

The sand is also ground by stone, but the grains of sand are polished by the forces of nature over thousands of years, and are so fine and soft that they fit into soft supplies. The biggest difference is that the sand is different colors, and different types are produced in different places. If you hold a handful of sand in your hand, you can't feel the presence of particles, but if you bathe with sand, you can remove dead skin on the surface of the skin and polish it**.

Sha, a broad name, refers to a species, such as sand, sand sea and other words; "Sand" generally refers to materials (building materials or process materials, etc.), such as gravel, sand and gravel, and "sand" as a material can also be divided into artificial sand and natural sand.

The composition is different, the composition of yellow sand is silica, and the composition of river sand is more complex and contains many impurities.

The effect is different, yellow sand has the effect of improving the heat flow of asphalt, and river sand can be used as an external wall insulation mortar.

What is the difference between sand and sand? Be very careful when buying materials and never buy the wrong one.