Why isn t desert sand used, and why can t the sand in the desert be used?

There are mainly the following reasons:

1. The sand in the desert is also called desert sand, because the desert sand is too fine, soily, too sticky, and has poor plasticity compared with river sand, which is not suitable for use in buildings and concrete.

2. The cross-section of the sand particles used in construction must be circular, because only the cross-section is approximately circular and the sand particles are stressed in all directions. In practice, river sand is generally used, because the river sand is better screened for the size of the sand particles through the transportation of the river, and the collision of the sand particles brought by the flowing water can make the particles smooth and round, so the sand in the middle reaches of the river is more suitable for construction sand.

3. The yellow sand in the desert does not have the viscosity of loess, nor does it have the buildability of sand, because it is too fine. For example, sand can be piled up to make shapes, and yellow sand to pile up shapes can be said to be labor-intensive, the most important thing is that it has been weathered and become very fine.

4. The standard of construction sand is divided into sand for concrete structure and sand for general building plastering, and the sand for structure is higher, and it is necessary to do sand retest and use sand to design the concrete mix ratio, and the sand with poor grading (referring to the uniformity of particle size) consumes a large amount of cement, so the cost of concrete is also higher.

5. The sand contains some soil, which is oily, and cannot be directly mixed with cement, and needs to be washed with water.

6. The problem of freight, although there is a lot of sand in the desert, the freight is also very large, and it is better to use local materials in the river.

It can be used to build houses, make glass, make sandbags, make electronic products, etc. But recently, a number of scientific institutions have released news that there is not enough sand, but isn't the Sahara Desert there, how can there be not enough sand? In this issue, I will be a match for you.

It can be used, but it is too expensive to use. The desert environment is harsh, and the cost of sand dredging workers is high. And the sand in the desert is very fine, too sticky, and has a high alkali content, which is not suitable for use in building materials.

The sand in the desert is not suitable for building materials, and excessive chloride ions in the sea sand will corrode the steel bars in the building, so that the house will collapse. Coarse sand or medium sand for construction sand, while the sand particles in the desert are too fine to meet the national requirements for the fineness of construction sand.

Because the sand in the desert is corrosive and has a short lifespan, the sand in the desert cannot be used.

Because the sand in the desert is relatively large and coarse, and most of the sand we use to build houses is relatively small, the sand in the desert cannot be used for construction sites.

First of all, because the construction sand is usually coarse sand or medium sand, and the sand particles in the desert are too fine, which does not meet the national requirements for the fineness of construction sand. The second is the problem of freight, although there is a lot of sand in the desert, but the freight is also very large, it is better to use local materials in the river.

The diameter of the sand particles in the desert is relatively large, and if you want to use the sand in the desert, you need to transport it to the city first, so the transportation cost is too high, and its value is too low, and the quality of the sand is not very good, and the gains outweigh the losses.

It can't be used, because the plasticity of the sand is very poor, its form is too thin and sticky, not only can it not build a house, but it also can't be reclaimed badly, and its cost is also very high.

The sand in the desert cannot be used, because the sand in the desert is particularly dry, and the sand in the desert has many harmful substances, which is very unsafe to use and is particularly prone to collapse.

It can't and can't be used for construction, because the alkali content of these sands is really high, and it can affect the quality of some sand and gravel mixtures. So I can't take advantage of it.

No, because the sand is very dry, has a very high alkali content, is very unstable, and has a very strong fluidity.

Because the desert sand is very fine, it is not suitable for building materials.

The sand used in the construction of houses is relatively coarse, because between the coarser sediment and cement, the void will be larger, so that the role of cement will be greater, and the viscosity will be better between the sediment, but the sand in the desert is basically produced by weathering, and it is very delicate in roughness, resulting in a small gap between the sediment, and when the cement is mixed in, it is difficult for the cement to fuse with them, resulting in weak adhesion, which is used for construction. Then it is easy to form what we call tofu slag engineering, which can easily produce collapse, in order to prevent such a phenomenon from happening, people never use the sand in the desert when building houses.

And the sand in the desert, in addition to being more delicate, the quality is also very light, the wind will fly, if the sand is used to build houses, then many houses will not be able to withstand the destruction of strong winds and waves, it is easy to cause a large area of collapse, will cause a lot of damage, so it is impossible to be used to build houses.

And in terms of operating costs, people have to transport back sand from the desert, in terms of time, it takes a long time, in terms of operating costs, the cost is also relatively high, consuming a lot of oil money and other expenses, so the sand in the desert, in the process of transporting back, the time is relatively long, the cost is relatively high, and more importantly, if you use the sand of the desert to build a house, no one can afford the harm they bring, so, no matter from which aspect, None of the sand in the desert can be used for construction.

The sand in the desert is very fine, and most of the sand used in the project is above and mixed according to the gradation requirements of different particle sizes, not that the finer the sand, the better.

Because the sands in the desert are formed by wind erosion, these sands rub against each other for a long time, so that the surface is very smooth and the particles are very small and cannot be aggregated together. As a result, the quality of the buildings built is poor and does not meet national standards, so the sand in the desert is rarely used in the construction industry, and even Dubai, located in the desert, has to import roads from other countries when building roads. <

Because the sand in the desert is formed by wind erosion, the sand rubs against each other for a long time, so that the surface is very smooth and the particles are very small and cannot be aggregated together. As a result, the quality of the buildings built is poor, and the mountain code method meets the national standard, so the sand in the desert is rarely used in the construction industry, and even Dubai, which is located in the desert, can only import roads from other countries when building roads.

The value is low, the transportation cost is expensive, and the income cannot make ends meet.

Sand can be divided into three types: coarse, medium, and fine. These divisions are important because they affect the engineering properties of the pavement, such as plasticity, strength, etc. The sand in the desert has a relatively open structure, and there is no interlocking between the sand grains.

If the sand is dry, the load-bearing capacity is still good; If the sand gets wet, the load-bearing capacity will deteriorate accordingly. Sand in the desert is expensive to mine, and relatively little is mined in the desert.

There is so much sand in the desert, why can't it be used? After reading the knowledge.

The value is too low, and the shipping cost is too high. Sand can be found at the seaside and other places, and the value is not high, and the cost of transporting it in the desert is much higher than that of sand, so it cannot be used.

Because the desert sand is very loose and not sticky, it cannot be used at all. Nor can it be used to construct buildings.

High alkali content of sand: The sand in the desert is formed by long-term weathering in a dry environment exposed to wind and sun, and the alkali content is too high, which will have a chemical reaction with some substances in building materials during use, affecting the quality of sand and gravel mixture.

1. The sand in the desert is indeed valuable and can be used, but the value is very low, so low that it is lower than the freight.

2. The world has long had the idea of transforming and using deserts, but it has not been very successful. Later, after discovering that the content of silicon in the sand was relatively high, some places opened glass factories and silicon factories that used sand as raw materials, but because of cost reasons, they could not win factories that used other raw materials.

3. The more successful desert cities are all because there are water sources nearby, or water is introduced from other places, such as Las Vegas in the United States, and some rich cities that directly extract fresh water from nearby seawater, and then survive and develop. The success of these desert cities is the success of water use, not the success of sand use.