Cement hydration is an exothermic reaction and since it is better to do cement hydration at a temperature between 10 to 25 ° C for 28 days, on the other hand, the initial setting of concrete at 20 ° C takes about 12 hours. Thus, to prevent the concrete from freezing in cold weather, we must reduce the initial setting time from 12 hours to about 3 to 5 hours, and this can be done by concrete antifreeze and complies with ASTM C494 standard and in two types of powder and Liquid is produced and supplied.
To prevent water freezing in concretes that are exposed to extreme cold.
Accelerate the initial setting of concrete, the risk of damage due to rapid changes in ambient temperature.
Reducing the freezing point of concrete.
Carrying out repair works in cold and icy weather.
RW Antifreeze is a product that can be used for concreting at temperatures of +5 to -15 degrees.
By adding RW Antifreeze, the reaction of the silicates in the cement, which has been severely slowed down by the deposition of calcium hydroxide layers on it, is accelerated, and the resulting heat helps to accelerate the setting of the concrete, reducing the risks of a rapid drop in ambient temperature.
By adding RW Antifreeze to the concrete mix, the water consumption can be reduced by up to 10% without changing the concrete performance, thus increasing the compaction and density of fresh concrete and the stability of hardened concrete against water freezing and thawing cycles.
RW Antifreeze is free of chloride and nitrate, does not damage reinforcement and concrete, and is compatible with any type of cement.
To determine the amount of consumption, refer to the table below.
Consumption in terms of weight percent of cement:
In the temperature range (+5 to 0) with a grade of 300 (2%) with a grade of 350 (1.5%) and with a grade of 400 (1%)
In the temperature range (0-5) with 300 carat (2.5%) with 350 carat (2%) and with 400 carat (1.5%)
In the temperature range (5- to -10) with 300 (3%) grade, 350 grade (2.5%) and 400 (2%) grade (according to the regulations, it is better to stop concreting in this area).
Pour the used RW Antifreeze into the truck and after thorough mixing with the ready-mixed concrete, start concreting.
When pouring concrete in cold weather, pay attention to the following points:
Remove the surface of the molds and reinforcements from water, snow and ice.
If possible, heat them to a temperature of more than zero degrees Celsius.
Keep the concrete temperature constant around 4 to 6 degrees Celsius.
If possible, keep the concrete warm with a suitable cover.
If the antifreeze freezes at very low temperatures, place it in a warm environment to thaw it and avoid heating it.
If necessary, materials, especially water, can be heated and the temperature of freshly poured concrete can be prevented by using a suitable coating.
During concreting, the temperature of any part of the concrete should not be less than + 5 ° C, because otherwise the chemical activity of cement hydration for setting and resistance will stop completely.
yellow
Specific weight: gr / cm³ 25/1
PH: About 7
Conditions and duration of storage: In the initial packaging and closed away from cold and heat for 12 months.
Packing: in 20 and 25 gallons and 220 kg barrels.
Technical specifications of powder type:
White color
Specific weight: 95/1 gr / cm.
PH: 7
Conditions and duration of storage: Initial packaging and closed away from cold, heat and humidity for 12 months.
Packing: in 20 kg bags
In case of contact with skin, rinse immediately with soap and water. In case of contact with eyes or respiratory mucosa, rinse immediately with plenty of water and seek medical advice immediately.
Environmental Tips:
Do not spill excess water or soil.
All products produced and supplied by this company are in accordance with international quality standards.
