CN1328203C - Additive for saltresistance series concrete - Google Patents

Abstract

The present invention relates to an additive, in particular to an admixture for preparing salt corrosion resistant concrete. The anti-salt stain series concrete admixture of the present invention is made of the following raw materials in percentage by weight: β-naphthalene sulfonate sodium formaldehyde condensation polymer 75-92%; sodium sulfate 4-15%; rosin thermal polymer 0.5-3.5%; Magnesium powder 1-2%; alkylbenzene sulfonate 0.5-3.5%; sodium fluorosilicate 1-3.5%; triethanolamine 1-2%; silicone 0.5-3.5%; defoamer 0.9-1.1%; chlorine Calcium 0.9-1.1%; sodium nitrite + sodium sulfate 0.9-1.1%; hydroxycarboxylic acids 1.5-2.5%. Compared with the prior art, the present invention has the following beneficial effects: the product has good effects on improving the frost resistance, impermeability and corrosion resistance of concrete, and prolonging the service life of engineering structures. The product of the invention has sufficient raw materials and is easy to prepare, and can be widely used in the construction of all engineering structures in salt lake areas and saline soil areas.

Description

Anti-salt series concrete admixture

technical field

The present invention relates to an additive, in particular to an admixture for preparing salt corrosion resistant concrete.

Background technique

As we all know, the development and utilization of salt lake resources is one of the key points of western development in the 21st century. Concrete has been widely used in engineering structures such as bridges, tunnels, production plants and office buildings for railways and highways in salt lake areas and saline soil areas. The serious corrosion of concrete by various salts in the salt lake area has aroused great concern in the engineering field. How to use anti-corrosion admixtures and mineral admixtures to prepare concrete with high anti-corrosion performance is of great significance to the high durability, safety and service life of engineering structures. At present, there are many types and varieties of concrete admixtures in China, but there are no records of anti-corrosion admixtures specifically for concrete structure engineering in salt lake areas and saline soil areas.

Contents of the invention

The problem to be solved by the present invention is to provide a concrete admixture with water-reducing, anti-freeze and anti-spot corrosion properties in view of the deficiencies in the prior art.

The technical solution of the present invention is: the anti-salt stain series concrete admixture of the present invention is characterized in that: the admixture is made of the following raw materials in percentage by weight to prevent freezing, impermeability, and anti-salt corrosion type admixture: Sodium naphthalene sulfonate formaldehyde condensation polymer 80-90%; sodium sulfate 4-7%; rosin thermal polymer 0.5-3%; alkylbenzene sulfonate 0.5-3%; sodium fluorosilicate 0.5-3%; Ketone 1.5-2.5%; defoamer 0.9-1.1%; calcium chloride 0.9-1.1%; sodium nitrite+sodium sulfate 0.9-1.1%; the sum of the percentages of each component of the admixture should be equal to 100%.

Compared with the prior art, the present invention has the following beneficial effects: since the present invention is a corrosion-resistant high-performance concrete admixture specially developed for concrete in salt lake areas and saline soil areas, the product has a great effect on improving concrete Excellent frost resistance, corrosion resistance, and prolonging the service life of engineering structures have good effects. The salt-resistance series concrete admixture of the present invention can prepare raw materials according to different brines and soil properties in high-altitude and alpine salt lake areas, and obtain concrete admixtures with water reduction, small shrinkage, crack prevention, frost resistance and salt corrosion resistance. The product of the invention has sufficient raw materials and is easy to prepare, and can be widely used in the construction of all engineering structures in salt lake areas and saline soil areas.

Detailed ways

The present invention will be further described below in conjunction with embodiment. The anti-salt stain series concrete admixture of the present invention is made of the following raw materials in percentage by weight: β-naphthalene sulfonate sodium formaldehyde condensation polymer 75-92%; sodium sulfate 4-15%; rosin thermal polymer 0.5-3.5%; Magnesium powder 1-2%; alkylbenzene sulfonate 0.5-3.5%; sodium fluorosilicate 1-3.5%; triethanolamine 1-2%; silicone 0.5-3.5%; defoamer 0.9-1.1%; chlorine Calcium 0.9-1.1%; sodium nitrite + sodium sulfate 0.9-1.1%; hydroxycarboxylic acids 1.5-2.5%.

The admixture is made of the following raw materials in percentage by weight, anti-salt stain, early-strength anti-corrosion and water-reducing admixture: 75-85% of β-naphthalenesulfonate sodium formaldehyde condensation polymer; 11.5-14% of sodium sulfate; Rosin thermal polymer 0.5-3.5%; sodium fluorosilicate 1-2%; silicone 1.5-2.5%; defoamer 0.9-1.1%; sodium nitrite + sodium sulfate 0.9-1.1%.

The admixture is made of the following raw materials in percentage by weight: antifreeze, impermeability, and anti-salt corrosion type admixture: 80-90% of β-naphthalenesulfonate sodium formaldehyde condensation polymer; 4-7% of sodium sulfate; rosin Thermal polymer 0.5-3%; Alkylbenzene sulfonate 0.5-3%; Sodium fluorosilicate 0.5-3%; Silicone 1.5-2.5%; Defoamer 0.9-1.1%; Calcium chloride 0.9-1.1% ; Sodium nitrite + sodium sulfate 0.9 ~ 1.1%.

Example 1.

Anti-corrosion and water-reducing type I anti-salinization concrete admixture made of the following raw materials in percentage by weight: 80% β-naphthalene sulfonate sodium formaldehyde condensation polymer; 12.5% sodium sulfate; rosin Thermopolymer 2.0%; Sodium Fluorosilicate 1.5%; Silicone 2.0%; Defoamer 1.0%; Sodium Nitrite + Sodium Sulfate 1.0%.

Example 2.

The slow-setting, anti-corrosion and water-reducing type II salt-resistant concrete admixture is made from the following raw materials in percentage by weight: 87.5% of sodium formaldehyde condensation polymer of beta-naphthalene sulfonate; 1.5% of magnesium powder; 2.0% of alkylbenzene sulfonate Sodium Fluosilicate 2.5%; Triethanolamine 1.5%; Silicone 1.0%; Defoamer 1.0%; Sodium Nitrite + Sodium Sulfate 1.0%;

Example 3.

Antifreeze, anti-seepage, anti-salt corrosion type III anti-salt concrete admixture is made of the following raw materials in percentage by weight: 85% of β-naphthalene sulfonate sodium formaldehyde condensation polymer; 5.5% of sodium sulfate; 1.5% of rosin thermal polymer %; alkylbenzene sulfonate 1.5%; sodium fluorosilicate 1.5%; silicone 2.0%; defoamer 1.0%; calcium chloride 1.0%; sodium nitrite + sodium sulfate 1.0%.

Claims (1)

1, a kind of additive for saltresistance series concrete is characterized in that: described admixture is made antifreeze, impervious, anti-salt marsh corrosion type admixture: β base sodium naphthalene sulfonate formaldehyde condensation products 80～90% by the following weight percent raw material; Sodium sulfate 4～7%; Colophonium pyrolytic polymer 0.5～3%; Alkylbenzene sulfonate 0.5～3%; Sodium Silicofluoride 0.5～3%; Silicone 1.5～2.5%; Defoamer 0.9～1.1%; Calcium chloride 0.9～1.1%; Sodium Nitrite+sodium sulfate 0.9～1.1%; Each component percentage ratio sum of described admixture should equal 100%.