Guzhen Early Strength Antifreeze Water Reducer Manufacturer – Is concrete antifreeze effective? What temperature can concrete add antifreeze resist?

Contents of this article

• What is the role of concrete antifreeze?

• What temperature can concrete with antifreeze resist?

• At what temperature can concrete be used with antifreeze?

• Is it better to add antifreeze or salt to concrete in winter?

• What are the main components of concrete antifreeze?

• Antifreeze that is not easy to react with alkali?

• Will concrete poured at zero temperature freeze?

• Is it good to use antifreeze when building a house in winter?

What is the role of concrete antifreeze?

Incorporating a certain amount of antifreeze into the concrete mixing water will lower the freezing point of the aqueous solution. The degree of reduction in the freezing point is related to the type and dosage of the antifreeze or the concentration of the solution. The effectiveness of antifreeze depends largely on the concentration of the solution and the negative temperatures to which the concrete is subjected during hardening.

Extended information:

Early-strength antifreeze uses special antifreeze materials, which can effectively reduce the freezing point of concrete and mortar, and greatly improve the antifreeze performance of concrete and mortar at negative temperatures. It can increase the early strength of concrete and mortar by more than 80% without reducing the later strength, thereby ensuring that the strength is equally developed under positive and negative temperature conditions. The effect is remarkable.

Antifreeze classification

Antifreeze can be divided into strong electrolyte inorganic salts (chlorine salts, chlorine salt rust inhibitors, chlorine-free salts), water-soluble organic Compounds, compounds of organic compounds and inorganic salts, and compound antifreeze.

It is divided into two categories: freezing point lowering type and surfactant type. Those that lower the freezing point include low-carbon alcohols, glycols and amides. Surfactant types can form a hydrophobic absorption film on the surface of materials, such as acidic phosphate ester amine salts, alkyl amines, fatty acid amides, organic acid esters, alkyl succinimides, etc.

For example, if it is mixed into concrete for winter construction, the concrete can harden at negative temperatures and reach sufficient anti-freeze strength within the specified time.

Can be made into powder or liquid. It is used to prevent frost swelling damage caused by concrete construction under negative temperatures in winter.

Ensure the normal construction of concrete under negative temperatures. Its main ingredients are sodium nitrite, carbonate, calcium chloride, calcium nitrite, urea, ethylene glycol, etc. They lower the freezing point in concrete mixes. It can also be combined with water-reducing agent, air-entraining agent, etc. to provide better antifreeze effect.

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What temperature can concrete with antifreeze resist?

The temperature that concrete with antifreeze can resist is -15 ℃. Function of antifreeze: Make concrete hydrate normally in a negative temperature environment of 0℃ to -15℃; lower freezing point and improve early strength of concrete. Antifreeze concrete hardens at negative temperature and achieves expected performance under specified curing conditions As well as substances that prevent moisture in materials from freezing at low temperatures. It ensures normal construction of concrete at negative temperatures and reduces the freezing point in concrete mixtures. It can be combined with water-reducing agents, air-entraining agents, etc. to achieve better antifreeze effects. Used in various applications Concrete projects are used during construction in cold seasons.

How many degrees below zero can concrete be used with antifreeze?

Antifreeze must be added at minus 5 degrees Celsius .

Antifreeze concrete is a substance that hardens at negative temperatures and achieves expected performance under specified curing conditions and prevents moisture in materials from freezing at low temperatures. It ensures the normal construction of concrete at negative temperatures and reduces the cost of concrete. The freezing point in the mixture.

It can be combined with water-reducing agent, air-entraining agent, etc. to achieve better anti-freezing effect. It is used in various concrete projects and is used during construction in cold seasons. It can make the concrete freeze at 0℃ to Normal hydration in a negative temperature environment of -15℃; lowers the freezing point and improves the early strength of concrete.

According to the building materials industry standard JC 475-2004 (replacing JC/T475-1992) antifreeze is defined as: An admixture that hardens concrete at negative temperatures and achieves expected performance and sufficient anti-freeze strength under specified curing conditions. It is a substance that can prevent moisture in materials from freezing at low temperatures.

Is it better to add antifreeze or salt to concrete in winter?

No

When adding water to cement concrete, salt cannot be added, that is, salt water or sea water cannot be used. Salt will destroy the concrete. Its microstructure affects its strength.

Antifreezing Agent, according to the Building Materials Industry Standard of the People's Republic of China JC

475-2004 (replacing JC/T475-1992 ), antifreeze is defined as: an admixture that can harden concrete at negative temperatures and achieve expected performance under specified curing conditions. It is a concrete that can harden at low temperatures.

Concrete What are the main components of antifreeze?

Concrete antifreeze has different uses and ingredients. Antifreeze is divided into chlorine-containing salt type, chlorine salt rust-inhibiting type, chlorine-free high-alkali type and chlorine-free low-alkali type. Type.

Antifreeze components include antifreeze components, early strength components, water reducing components, air entraining components and activation components.

Early strength concrete antifreeze components There are sodium sulfate, sodium chloride, sodium nitrite, calcium lignosulfonate and naphthalene series superplasticizer.

Antifreeze that is not easy to reverse alkali?

Calcium chloride, sodium acetate, magnesium chloride, etc. Dimethyl sulfoxide can be used as an antifreeze for latex, and urea and thiourea also have antifreeze effects on latex. If it is not an inorganic salt, it will not react with alkali.

Antifreeze concrete is a substance that hardens at negative temperatures, achieves expected performance under specified curing conditions, and prevents moisture in the material from freezing at low temperatures. Ensure normal construction of concrete under negative temperature and reduceFreezing point in concrete mixes. It can be combined with water-reducing agent, air-entraining agent, etc. to achieve better antifreeze effect. Used for various concrete projects and during construction in cold seasons.

Makes concrete hydrate normally in a negative temperature environment of 0℃ to -15℃; lowers the freezing point and improves the early strength of concrete.

Will concrete poured at zero temperature freeze?

Concrete will be frozen at zero degrees, and it will be frozen at about minus five degrees. If the temperature is too low, the solidification time of concrete will be prolonged, and the internal water crystallization will cause cracks in the concrete, ultimately affecting the strength of the concrete. Concrete construction is not suitable when the local temperature is too low.

Precautions for winter construction are as follows:

1. During winter construction, pay attention to the local temperature conditions. If the local temperature is too low, for example, the temperature is below 5 degrees, it is usually not recommended to continue construction, otherwise the construction quality will be affected. For example, when applying latex paint, if the construction temperature is lower than 5 degrees, the problem of incomplete paint film formation will occur.

2. During winter construction, it is easy to stop work due to sudden temperature drop. Therefore, when ordering building materials, it is necessary to calculate the amount of building materials to avoid excess building materials. Building materials should be stored in a dry place. When storing building materials, they can be covered with cotton felt to prevent the building materials from freezing.

3. If the construction is in winter, relevant anti-freeze measures must be taken. For example, before concrete construction, do not wash the construction surface with water to avoid moisture crystallization. During concrete construction, you can add antifreeze to enhance the antifreeze function of the product. After the concrete is poured, the curing time should be appropriately extended. During the maintenance period, its surface can be covered with straw curtains to enhance the thermal insulation effect, etc.

Is it good to use antifreeze when building a house in winter?

It is best to use antifreeze when building a house in winter.

In winter construction specifications, the temperature is below minus 5 degrees. Corresponding antifreeze measures must be taken to prevent ice crystals formed due to low temperatures after concrete pouring from affecting the quality of the concrete.

Admixing antifreeze is one of many measures, and it is also the most commonly used method at present. However, the mixing of antifreeze must be strictly based on a certain proportion. The general mixing proportion of commonly used antifreeze is 5% of the cement dosage. Excessive mixing will affect the quality of concrete to a certain extent.

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