Why sodium silicate powder can be used to produce acid-resistant cement?
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Author : Lzh
Update time : 2023-02-16 15:52:13
What is sodium silicate powder? There are two kinds of sodium silicate,Chemical formula NA2SIO3, the formula is 122.00, which is sodium silicate. Chemical formula NA4SIO4, the recipe volume is 184.04, which is corrected sodium. Sodium silicate is a colorless solid with a density of 2.4g/cm3 and a melting point of 1321K (1088 ° C). It is soluble in water to form a sticky solution, which is usually called water glass and air puff alkali. This is an organic adhesive. Sodium silicate is usually called water glass in the south, and the north is called air bubble. Aquatic solution of sodium silicate is usually called water glass. Sodium sodium silicate is colorless and transparent solid. Sodium silicate sold on the market mainly contains some light blue impurities. Correct sodium is a colorless crystal, and its melting point is 1291K (1088 ° C), which is rare. The water glass solution is alkaline due to hydrolysis (slightly stronger than the Soviet gray). Because it is weak acid, it can precipitate silicic acid when there is a hydrochloric acid, sulfuric acid, nitric acid, and carbon dioxide. During the storage, carbon dioxide should be closely prevented, and rubber stop animals should be used to prevent ground glass from obstructing the adhesion. In industries, sodium carbonate and quartz are usually used to combine a total of NA2CO3+SIO2 → Na2SIO3+CO2 ↑. Due to Asian salt, these products usually have light blue colors. They are used as inorganic bonding agents (can be with talc powder, etc.), soap fillers and acid -resistant concrete mixes. After adding pigments, they can be used as the outer wall coatings and pour it into the basic soil of ancient buildings to prevent the soil firmly to prevent collapse.
Use of sodium silicate powder Repair the cracks in the brick wall, mix water glass, granulated blast furnace slag powder, sand, and sodium fluosilicate in proper proportion, and press them directly into the cracks of the brick wall, which can play the role of bonding and reinforcement. The sodium silicate aqueous solution can be used as the outer surface of the fire door. It can be used to manufacture acid-resistant cement, for the lining of furnaces and pits, and prepare silica gel.
Physical and chemical properties of sodium silicate powder The higher the modulus of sodium silicate, the more difficult the solid sodium silicate is to be dissolved in water. When n is 1, it can be dissolved in normal-temperature water. When n is greater than 3, it needs hot water to be dissolved. When n is greater than 3, it needs more than 4 atmospheres of steam to be dissolved. The higher the modulus of sodium silicate, the more the content of Si, the higher the viscosity of sodium silicate, the easier it is to decompose and harden, and the greater the adhesion. Moreover, the degree of polymerization of sodium silicate with different modulus is different; as a result, the silicic acid components in the hydrolysate that have an important impact on production and application also have significant differences, so sodium silicate with different modules has different uses.
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