Characteristics:

Sodium silicate, commonly known as Sodium Silicate,is a water-soluble silicate whose aqueous solution is water glass.Its chemical formula is R,O-n SiO,where RO is an alkali metal oxide,and n is the ratio of the number of moles of silicato the alkali metal oxide,which is called the modulus of water glass.The commonly used water glass in architecture is anaqueous solution of sodium silicate (Na,O-n SiO).which is a colorless orthogonal biconical crystal or a white to off-whiteblock or powder,which can be weathered and loses 6 molecules of crystal water at 100C.Easily soluble in water,soluble indilute sodium hydroxide solution,insoluble in ethanol and acid,melting point 40~48'C Low toxicity,strong adhesion,highstrength,good acid resistance,heat resistance,poor alkali resistance and water resistance.

Mainly used as analytical reagents, fire retardants, adhesives, etc., such as:

. Paint the surface of the material to improve its resistance to weathering. Immerse or paint porous materials such as clay bricks, cement concrete, silicate concrete, stone, etc. with water glass with a density of 1.35g/cm3 to increase the density and strength of the material, Impermeability, frost resistance and water resistance, etc.

. Reinforce the soil. The water glass and calcium chloride solution are alternately injected into the soil by pressure, and the generated silicic acid gel is in a swelling state due to the absorption of water in the soil in a humid environment, and the soil is consolidated.

. Prepare quick-setting waterproofing agent.

Repair cracks in the brick wall.After mixing water glass,granulated blast furnace slag powder,sand and sodium fluorosilicate in an appropriate proportion, they are directly pressed into the cracks of the brick wall, which can play the role of bonding and reinforcement.

The use of water glass is very extensive, almost in all sectors of the national economy. In the chemical system, it is used to produce various silicate products such as silica gel, white carbon black, zeolite molecular sieve, sodium metasilicate pentahydrate, silica sol, layered silicon and instant powdered sodium silicate, potassium sodium silicate, etc. The basic raw matenal of silicon compounds. In economically developed countries, more than 50 types of deep-processing products using sodium silicate as raw materials have been developed, some of which have been used in high, precise, and cutting-edge technology fields; in light industry, they are indispensable raw materials for detergents such as washing powder and soap. It is also a water softener and sedimentation aid; used in the textile industry for dyeing, bleaching and sizing; widely used in casting, grinding wheel manufacturing and metal preservatives in the machinery industry, used in the construction industry to manufacture quick-drying Cement, acid-resistant cement, waterproof oil, soil curing agent, refractory materials, etc, in agriculture, it can be used to make silicon fertilizer; in addition, it can be used as a silica-aluminum catalyst for petroleum catalytic cracking, soap filler, corrugated paper adhesive, laboratory crucible and other high-temperature materials Metal preservatives, water softeners, detergent additives, refractory materials and ceramic raw materials, textile bleaching, dyeing and sizing, mine beneficiation, waterproofing leak-stopping, wood fire prevention, food preservation and adhesives, etc. The breakdown is as follows

. Improve resistance to weathering

After the water glass solution is painted or impregnated with the material it can penetrate into the gaps and pores, and the cured silcone gel can block the capillary channels, increase the density and strength of the material, and improve the weathering resistance of the material. But water glass shall not be used to paint or impregnate piaster product. Because water glass reacts with gypsum to generate sodium sulfate (Na25O4), it crystallizes and expands in the pores of the product ausing the ypsu product to crack and damage.

. Reinforce the soilThe water glass and calcium chloride solution are alternately injected into the soil. The two solutions react quickly to formsilica gel and calcium silicate gel, which play the role of cementing and filling the pores, so that the strength and bearingcapacity of the soil are improved. It is commonly used for foundation reinforcement of silt, sand and fill, called double-liquidgrouting

. Formulated quick-setting waterproofing agentWater glass can be formulated with a variety of alum to make a quick-setting waterproofing agent, which is used for localemergency repairs such as leaking plugging and caulking. The coagulation speed of this kind of multi-alum waterproofingagent is very fast, usually several minutes, of which the four-alum waterproofing agent does not exceed 1 minute, so it mustbe ready to use when used on the construction site.Including common bile alum (copper sulfate),red alum(potassium dichromate, K2Cr207), alum (also known as alum, potassium aluminum sulfate), purple alum, etc.

. Formulated acid-resistant gelAcid-resistant gelling is made of water glass and acid-resistant powder (usually quartz powder). Like acid-resistant mortar and concrete, it is mainly used for projects that require acid resistance. Such as sulfuric acid pool and so on.

.Prepare heat-resistant mortarWater glass cementing is mainly used for masonry and repair of refractory materials. Water glass heat-resistant mortar and concrete are mainly used for blast fumace foundations and other structural parts that require heat resistance.

. Anti-corrosion engineering applicationModified water glass acid-resistant mud is an important material for acid corrosion resistance. Its main characteristics are acid resistance, temperature resistance, compactness and impermeability, low price and convenient use. It can be mixed into aod-resistant mortar acid-resistant mortar and acid-resistant concrete. It is suitable for the anti-corrosion projects of varous structures in the chemical industry, metallurgy, electric power, coal, textile and other sectors. Ideal materal for building

.AdhesiveIn the 1950s, the water glass blowing carbon dioxide process was widely used. The water glass was added in a high amount and poor collapubility The old sand could not be reused, wasted silica sand resources, discharged a large amount of soid waste, destroyed the ecological environment, and produced poor quality castings Facing being eliminated. New ester-hardened water glass self-hardening sand came out in 1999. The added amount of water glass is 1.8-3.0%. It has high strength and good collapubility The old sand can be recycled and reused. The reuse rate is 80-90%. The use hime is adjustable. It is used in mechanzed molding production line, and can also be used for single piece small batch production. It can produce vanous castings of several klograms to several hundred toms, and it has been popularized and applied in dozens of enterprises in rallway vehicles, metallurgical machinery, heavy machinery, mining machinery, and general machinery tactornes. The new type of waten glass is known as a green and environmentally fnendly casting binder that is in line with sustainable development.

Technical data