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Anonymous users2024-02-08No, the material is different.
The sand in the desert is not the same concept as the sand we use in construction.
The sand in the desert belongs to weathered sand, which is formed by weathering of rocks and the like, and is a weathering product
1) Pyroclastic materials include rock detritals and mineral detritals, the most common of which is chemically stable quartz detritals; Feldspar chips are also common in arid climates; In addition, muscovite, garnet, etc. can also be found in the detrital components. Detrital material is mainly a product of physical weathering of the rocks, and sometimes it can also be the product of incomplete decomposition of chemical weathering. Clastic material is the main component of clastic rocks that make up sedimentary rocks.
2) Dissolved substances are mainly products of chemical weathering and biochemical weathering. k+ in rocks
Plasmanions combine to form soluble salts such as carbonates, chlorides, hydroxides, and sulfates, which are lost with water migration in the form of true solutions. SiO2, Al2O3, Fe2O3, etc., which are decomposed from rocks, can also be lost as colloidal solutions under certain conditions. For example, SiO2 can migrate over long distances in alkaline solution (pH 7), Al2O3 in a strongly alkaline or strongly acidic solution (pH 11 or pH 4), and Fe2O3 in a strongly acidic solution (pH 2-3).
These substances are deposited under certain conditions, and they constitute the main components of chemical rocks in sedimentary rocks.
3) Insoluble substances The above-mentioned SiO2, Al2O3, Fe2O3, etc., except for a part of the migration and loss under specific conditions, most of them are relatively enriched to form insoluble secondary minerals such as kaolin, bauxite, hematite, limonite, etc., which are the main components of clay and other rocks in sedimentary rocks.
It can be seen that the composition of desert sand is complex, it contains a lot of clay, etc., and the clay and bauxite in building concrete cannot exceed the standard.
At present, construction sand is divided into artificial sand and natural sand, and sand is divided into natural sand and artificial sand according to its origin. Rock particles with a particle size of less than 5 mm formed by natural conditions become natural sand. Natural sand can be divided into river sand, lake sand, sea sand and mountain sand.
Artificial sand is further divided into machine-made sand and mixed sand. Machine-made sand is made by crushing and screening by machines, and the particle size is smaller than the rock particles, but does not include the particles of soft rock and weathered rock. Mixed sand is sand made from a mixture of manufactured sand and natural sand.
Hope it helps you thank you very much.
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Anonymous users2024-02-07Earth sciences are listed as science and engineering programs in universities. Geography is a part of earth science, so geography is also included in science and engineering.
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Anonymous users2024-02-06This is the earth science section, and earth science includes many disciplines, not only geography, but there are more geographical problems here, hehe.
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Anonymous users2024-02-05Hello, glad to ask you for your answers, I hope you can solve the problem after you see my reply:
There are several reasons for this:
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Because in the same transmission power.
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Because the glass material looks bright, it can make the overall bathroom look more spacious. And the glass is dirty and easy to clean, just rinse with water and wipe it with a cloth.