Sand is an essential material in cement mortar. If there is no sand in the cement mortar, the solidification strength will be almost zero.
ready
The type of yellow sand was known
(1) From the specifications, sand can be divided into fine sand, medium sand and coarse sand. Sand particle size of 0. 25 ~ 0. 35mm for fine sand, powder diameter 0. 35 ~ 0. 5mm for the sand, greater than 0. 5mm is called coarse sand. Sand is recommended for general home improvement.
(2) From the source, sand can be divided into sea sand, river sand and mountain sand. In the architectural decoration, the state strictly prohibits the use of sand. Although the sea sand is clean, the high salt content will have a great impact on the quality of the project. To distinguish whether it is sea sand or not, it is mainly to see if the sea contains tiny shells. Because of the rough surface of the sand, the cement has a good effect, but the components of the mountain sand are complex, and most of them contain mud and other organic impurities. Therefore, in the general decoration process, river sand is recommended. The surface roughness of river sand is moderate, and it is relatively clean and contains less impurities. The sand that is generally purchased from the market can only be used after being sieved.
Picking skills
Sand should be selected sand, the sand thickness of the particles is very suitable for use in cement mortar. Many customers think that the better the sand, the better the mortar is, in fact, a misunderstanding. Too fine sand adsorption capacity is not strong, can not produce a large friction and stick to the tile.
Examples
What is the ratio of cement yellow sand in cement mortar?
Cement mortar should generally be cement: sand ratio of 1:2 (volume ratio); the proportion of tiles should be no more than cement:sand=1:3 to stir.
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