Contents of this article
How to prepare antifreeze?
What is the proportion of cement antifreeze added?
How much antifreeze is added to one ton of cement?
What is the proportion of c25 fine stone concrete antifreeze?
Anti-freezing formula of ethyl acetate?
How much antifreeze can be used for one square meter of cement roof?
How to prepare antifreeze?
The weight ratio of antifreeze formula, the percentage of each component is: deionized water 30-65.5%, ethylene glycol 30-60%, dioctyl azelate 1-10%, diethylene glycol Alcohol monomethyl ether 1-10%, sodium tripolyphosphate 0.2-0.3%, potassium polyphosphate 0.4-0.5%, acrylate 1.1-1.2%, ammonium dihydrogen phosphate 0.2-0.4%, potassium hypophosphite 0.2-0.4% , sodium phosphite 0.3-0.5%, this method has the characteristics of low freezing point, anti-corrosion, scale inhibition, high boiling point, flame retardant and so on. Formula raw materials: water (softened water or distilled water), ethylene glycol, disodium hydrogen phosphate.
Preparation method: Mix ethylene glycol and water together in a ratio of 1:1.5 (mass ratio), add an appropriate amount of disodium hydrogen phosphate, and add a little sky blue pigment.
There are many types of automobile antifreeze, such as inorganic calcium chloride (CaCl
2), organic methanol (CH3OH), ethanol (C2H5OH, commonly known as alcohol), Ethylene glycol (C2H4(OH)2, commonly known as sweet alcohol), glycerol (C3H5(OH)3, commonly known as glycerin), lubricating oil, and common sugar and honey in our daily life can all be used as the mother liquor of antifreeze. , after adding an appropriate amount of pure soft water (water containing no or a small amount of calcium and magnesium ions, such as distilled water, unpolluted rainwater, snow water, etc., the total hardness component concentration of the water quality is between 0-30ppm), you can Becomes antifreeze in a general sense.
What is the proportion of cement antifreeze added?
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.
How much antifreeze is added to one ton of cement?
One ton of cement plus about 35 kilograms of antifreeze. The amount of antifreeze added is usually 3.5% of the cement dosage, with a maximum of no more than 5%. Generally, the amount of antifreeze added is 5% of the concrete volume, which is closely related to the concrete strength and concrete volume.
Adding antifreeze to concrete can ensure normal use of concrete at low temperatures. Of course, if water-reducing agent and air-entraining agent are added at the same time, the antifreeze effect will be better.
What is the proportion of c25 fine stone concrete antifreeze?
Concrete is one of our most common building materials, so what is the proportion of antifreeze added to concrete?
1. What is the ratio of adding antifreeze to concrete?
Normally, the ratio is between 100:3 and 100:5. The specific value depends on the ambient temperature of the construction and the concrete. Category, when taking concrete anti-freeze measures, you can also add alkaline water agent or air-entraining agent, which can make the anti-freeze effect better and ensure that the concrete can reach the expected hardness.
2. What are the precautions for concrete construction?
1. To ensure safety when pouring concrete, you need to check whether the supported formwork is stable, especially the cantilever accessories. If it is stable If the performance is poor, construction cannot be started, and special attention must be paid to the condition of the formwork during pouring. If there is any abnormality, it must be stopped in time.
2. Holes need to be left on the edge of the construction transportation channel, so as to ensure that there will be no problems at the elevator entrance, the maintenance railings can operate normally, and the temporarily built lanes at high places can also be stable, and there are still surrounding areas. To match the railing maintenance.
3. When transporting vertically, the cart transporting concrete cannot exceed the outside of the hanging plate. If the wheels are blocked at the front and rear, ensure that the hanging plate is stable when unloading, and the surrounding construction People must stay out of the way to ensure their personal safety.
4. Before using the vibrator, make sure that there is no problem with the power cord. For example, there should be no connectors on the cable, and make sure that its length is sufficient. Construction workers should also take appropriate protection, such as Wear insulating shoes and gloves.
5. If you are working at night, you must also ensure that the lighting equipment is sufficient, and avoid accidents during construction.
Anti-freezing formula of ethyl acetate?
In order to increase the concentration of body fluids, we can choose urea, glucose, brassinoids/ethyl acetozolin. Since the temperature is low and the activity of brassinoids is low, it is best to use acetate. You can also use potassium dihydrogen phosphate, amino acids, and ammonium ester to make antifreeze to enhance the concentration of body fluids and achieve an antifreeze effect. For the specific ratio, it is recommended to use 15 kilograms of water + 50 grams of urea + 80 to 100 grams of glucose + 3 grams of brassinoids and 3-5 grams of ethylamine source powder, and just spray it on the leaves.
How much antifreeze can be used for one square meter of cement roof?
Generally, the amount of antifreeze added is 5% of the concrete volume, which is closely related to the concrete strength and concrete volume. Adding antifreeze to concrete can ensure normal use of concrete at low temperatures. Of course, if water-reducing agent and air-entraining agent are added at the same time, the antifreeze effect will be better.
Anti-freeze and water reduction of adulterated general commercial concreteThere is a certain early strength component in the agent, and the dosage in winter is about 3.0-3.5% of the total cementitious material. For example, if the total C30 glue material is 380KG, the antifreeze should be mixed at 3.5%, which is 380*3.5%. , as for the specific early strength component in the antifreeze, the admixture factory will adjust the proportion accordingly based on the test.
Concrete antifreeze is combined with winter application 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. The chloride-free salt avoids the corrosion of steel bars and improves the strength. Durability of concrete. </p
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