Contents of this article
What are the ingredients of concrete antifreeze?
What is the formula ratio of cement antifreeze?
What are the main components of concrete antifreeze?
What is the ratio of c20 concrete antifreeze?
What is the ratio of antifreeze powder and cement?
How to prepare compound liquid antifreeze?
What are the ingredients of concrete antifreeze?
The main ingredients of concrete antifreeze are: sodium sulfate, sodium chloride, sodium nitrite, calcium lignosulfonate and naphthalene series superplasticizer.
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 the normal construction of concrete under negative temperature and reduce the freezing point in the concrete mixture. 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.
Making concrete hydrate normally in a negative temperature environment of 0℃ to -15℃; lowering the freezing point and improving the early strength of concrete. The lower the concrete is used, the better the antifreeze effect of the antifreeze. The more time (including negative temperature zone) there is to increase the strength, the possibility of reaching the critical strength of frost resistance is greatly increased.
The antifreeze component can change the liquid phase concentration of concrete, lower the freezing point, and ensure that the liquid phase exists in the concrete at negative temperatures, so that the cement can continue to hydrate. The water-reducing component can reduce the water consumption for concrete mixing, thereby reducing the amount of ice in the concrete, making the ice crystals finer and evenly dispersed, and reducing the damage stress to the concrete. The air-entraining component introduces a certain amount of tiny closed bubbles to reduce frost heave stress.
What is the formula ratio of cement antifreeze?
Mixed with 3% to 5% of cement.
One bag is calculated as 100kg, which means adding about 3kg-5kg.
The antifreeze agent 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.
And 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, and the effect is significant. One ton of cement uses 30-50 kilograms of antifreeze.
What are the main components of concrete antifreeze?
Concrete antifreeze has different uses and different 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.
Antifreeze consists of antifreeze component, early strength component, water reducing component, air entraining component and activation component.
The ingredients of early-strength concrete antifreeze include sodium sulfate, sodium chloride, sodium nitrite, calcium lignosulfonate and naphthalene series high-efficiency water reducing agent.
C20 concrete antifreeze ratio?
C20 fine stone concrete floor refers to the concrete floor made of C20 concrete. C20 is the concrete strength grade. The first letter C in the English name of concrete is added to its compressive strength standard value to express the compressive strength standard value 20, which is 20MPa, which is N/mm^2. The design strength of concrete is C20. Because fine stones are added to the concrete, it is written as C20 fine stone concrete. C20 fine stone concrete mix ratio (mass) cement:sand:gravel:water:antifreeze=1:2.01:3.27:0.54::0.05
What is the ratio of antifreeze powder and cement?
Generally, 3% to 5% of cement is mixed.
One bag is calculated as 100kg, which means adding about 3kg-5kg.
The antifreeze agent 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.
And 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, and the effect is significant. One ton of cement uses 30-50 kilograms of antifreeze.
How to prepare compound liquid antifreeze?
Concrete antifreeze can be divided into strong electrolyte inorganic salts (chlorine salts, chlorine salt rust inhibitors, chlorine-free salts), water-soluble organic compounds, and compounds of organic compounds and inorganic salts according to their ingredients. Class and compound antifreeze.
—Chlorine salts: additives using chlorine salts (such as sodium chloride, calcium chloride, etc.) as antifreeze components;—Chlorine rust inhibitors: containing rust inhibitor components and using chlorine salts Admixtures that are antifreeze components: - Chlorine-free salts: admixtures that use inorganic salts such as nitrite and nitrate as antifreeze components; - organic compounds: some alcohols, urea and other organic compounds are used as antifreeze components - Compound antifreeze: an antifreeze component combined with early strength, air entrainment, water reduction and other additives. Concrete antifreeze is combined with winter temperature conditions, which can accelerate the condensation and hardening of concrete under negative temperature conditions. The strength increases significantly and does not affect the later strength development. Chloride-free salt avoids corrosion of steel bars and improves the durability of concrete. 1. Dosage: liquid temperature -5 ~ -20℃, accounting for 2.0-5.0% of the cementitious material; powder temperature -5 ~ -20℃, accounting for 2.0-5.0% of the cementitious material; 2. Function: mainly used for commercial concrete. Suitable for reinforced concrete, prestressed concrete and fly ash-mixed concrete. </p
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