1. What is sodium silicate?
Water glass, namely sodium silicate, is a soluble alkali metal silicate material, which is composed of alkali metal oxide and silicon dioxide, also known as sodium silicate. Its chemical formula is R2O nSiO2, where R2O is an alkali metal oxide, and n is the molar ratio of silicon dioxide to alkali metal oxide, which is called the modulus of water glass. Sodium silicate (Na2O NSIO 2) is usually used in buildings.
Density of sodium silicate: The density of sodium silicate commonly used in civil engineering is generally 1.36 ~ 1.50g/cm3.
Water glass modulus: Water glass modulus is an important parameter of water glass, generally between 1.5-3.5. The larger the modulus of water glass, the more difficult it is for solid water glass to dissolve in water. The more silica content, the higher the viscosity of water glass, the easier it is to decompose and harden, and the greater the cohesive force.
Second, the use of water glass
1. Brush the surface of the material to improve its weatherability. At a density of 1.35g/cm? Soaking or brushing porous materials such as clay brick, cement concrete, silicate concrete and stone with sodium silicate can improve the compactness, strength, impermeability, frost resistance and water resistance of materials.
2. Strengthen the soil. Sodium silicate and calcium chloride solution are alternately injected into the soil, and the generated silicic acid gel absorbs the water in the soil and consolidates the soil in a humid environment.
3. Prepare quick-setting waterproof agent.
4. Repair cracks in brick walls. Sodium silicate, granulated blast furnace slag powder, sand and sodium fluorosilicate are mixed in a proper proportion and directly pressed into the cracks of brick walls, which can play a role in bonding and strengthening.
5. Sodium silicate aqueous solution can be used as the external surface of fire doors.
6. It can be used to make acid-resistant mastic, and used for lining of furnaces and mines.
7. In the chemical system, it is used to manufacture silica gel, silica, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol and other silicate products.
8. In light industry, it is an indispensable raw material in detergents such as washing powder and soap, and it is also a water softener and settling aid.
9. Used for dyeing, bleaching and sizing in textile industry.
Third, the price of water glass
How much is a ton of sodium silicate? This is what many people want to know. The scientific name of water glass is industrial sodium silicate, which is used for the rapid solidification of coatings and cement. Anti-seepage grouting has a good effect. There are many specifications and models of sodium silicate. Generally, the pricing is mainly based on concentration and modulus. The average price is 500-900 yuan tons, and the better price is above 654.38+10,000 yuan. Freight is generally calculated separately.
Fourth, the difference between water glass and glass
The difference between water glass and glass lies in: intuitively, water glass is liquid, and glass is solid after cooling; The main component of glass is silicon dioxide, while water glass is the liquid produced by leaching solid obtained after high temperature such as quartz sand and sodium carbonate, and the main component is sodium silicate.
Before buying sodium silicate, you can know its characteristics and price, and then you need to know its use and construction standards. Apply for the decoration warranty of Tuba Rabbit. Professional decoration supervision can help us analyze the differences in the use of decoration materials and help us do the quality inspection of decoration construction for free!
Verb (abbreviation of verb) Classification of sodium silicate
There are two kinds of 1. sodium silicate, one is sodium metasilicate, with the chemical formula of Na2SiO3 and the molecular formula of 122.00. Sodium metasilicate alias "disodium trisilicate", CAS number:? 6834-92-0。
The other is sodium orthosilicate (sodium orthosilicate) with chemical formula of Na4SiO4 and relative molecular mass of 184.04.
2. Sodium orthosilicate is a colorless crystal with a melting point of1291k (1088℃), which is relatively rare. Sodium silicate solution is alkaline (slightly stronger than soda ash) due to hydrolysis. Because it is a weak acid salt, silicic acid can be precipitated from hydrochloric acid, sulfuric acid, nitric acid and carbon dioxide. During storage, carbon dioxide should be strictly prevented from entering, and rubber plugs should be used to prevent the ground glass plugs from sticking. Na2CO3+SiO2→Na2SiO3+CO2↑ It is usually produced by timely molten soda ash in industry. Because of the existence of ferrous salt, the product is usually light blue-green. Can be used as an inorganic adhesive preparation (mixed with talcum powder, etc.). ), acid-resistant concrete is prepared with soap filler, which can be used as exterior wall coating after adding pigment and poured into the foundation soil of ancient buildings to make the soil solid and prevent collapse. ?
3. Sodium silicate is a low molecular weight crystal prepared by ordinary sodium silicate and caustic soda through hydrothermal reaction. Commodities include anhydrous, pentahydrate and nonahydrate, among which nonahydrate only exists in China market. It is an emergency product with low technical content that was hastily developed in the 1980s. Because its melting point is only 42℃, it is easy to become liquid or paste when stored, and it is gradually being eliminated. However, due to the habits of some users and the indifference to crystal water in some fields, sodium metasilicate nonahydrate still exists.
The above is about what water glass is, its use, price and so on. , for reference only. Want to know more about decoration materials, please pay attention to Tubatu Decoration Network for more information.
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