Why the sand can not replace the river sand to do building materials
Mountain sand because of the rough surface, so the cement attachment effect is good, but the mountain sand composition is complex, most contain soil and other organic impurities. Therefore, the general decoration works, are recommended to use the river sand. River sand surface roughness moderate, and more clean, with less impurities. Generally from the market to buy back the sand have to use the net to filter before use.
The nature of these two sand is different.
In the architectural decoration, the state is strictly prohibited to use sand. Although the sea sand clean, but the state is strictly prohibited without desalination of the sea sand as a building material. Because the sea sand salt high, easy to make the construction of chloride ion corrosion steel, resulting in security risks. To distinguish whether it is sand, mainly to see whether the sand contains the sea Ji twitch conviction murder bet ghosts astringent Han small shells.
