Anti-Freeze Admixture BC36

BC36 is used for preventing the concrete from freezing at low temperature, reducing the setting time, intensifying heat generating and creating good condition for concrete or mortar performance in cold weather. Furthermore, pay attention to the requirements of ACI 306R code for cold weather concreting.

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Description

Field of Application

Performing concrete and mortar in cold weather for temperatures ranging from -8 to +5° C,
When freezing or quick temperature drop is forecasted.

Properties and Effects

Increasing initial setting and concrete and mortar hardening,
Increasing the speed of hydration,
Intensifying heat generating and attaining higher resistance to freezing at early ages,
lowering freezing point of water content in concrete and mortar,
Decreasing water-cement ratio under constant workability condition,
Increasing integrity and durability of concrete and mortar in freezing condition,
Preventing the concrete from freezing.

Dosage

According to the ambient temperature and the cement percentage, the dosage rate varies. Paying attention to the requirements of cold weather concreting, table 1 can be used as a reference.

Instruction for use

BC36 should be added by mixing water or after, then continue mixing.

Technical Data

Color: Yellow
Physicalstate: Liquid
Density: 1.28 g/cm3
PH: Approx. 7
Solubility: In water
Chloride: Nill

Storage

Storage: In capped container protected against air,
Shelf life: 1 year in original package,
Packaging: 25 and 250 Kg drums.

Technical observation and application

The cold weather is referring to condition where the average ambient temperature for more than three continuous days is less than +5°C. If the ambient temperature in more than half of a 24 hours period is above +10°C, it isn’t verifying to cold weather concreting anymore,
Obeying the requirements of ACI 306R code for concreting in cold weather condition is necessary,
Anti-freeze additive does not lower the freezing point of concrete, because the hydration reaction will stop at the temperature below +5°C. As mentioned before, the anti-freeze additive will prevent concrete from freezing by accelerating the reaction between water and cement and intensifying heat generating. Furthermore, performing the quality control experiments on anti-freeze additive requires adding it to the concrete and measuring the process of compressive strength gaining and concrete temperature comparing to the original sample. Note: for experimenting the anti-freeze additive don’t put it into the freezer,
Table 1 is a good reference for concreting in cold weather,
It is recommended to use anti-freeze additive with BC8 to increase the required strength.
Using more than 5% of anti-freeze additive in concrete results in reducing concrete strength,
By half of anti-freeze content reduce the water content in concrete,
The more the cement percentage, the less the dosage rate,
When simultaneous use of several admixtures in concrete mix is required, consult Research Center of Beton
Chimie.

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