① Consider the growth of concrete strength in a negative temperature environment.
②The amount of antifreeze.
③The amount of other components in the composite antifreeze.
④The amount of antifreeze used should comply with the following regulations: when the daily minimum temperature is -5℃, the concrete should be made of one layer of plastic film and two layers of straw bags or other substitutes. When covering and maintaining supplies, early-strength agent or early-strength water-reducing agent can be used instead; when the daily minimum temperature is -10℃, -15℃, -20℃, when the above insulation measures are adopted, the specified temperature can be -5℃, -10 ℃and-15℃ antifreeze.
⑤ When preparing and using antifreeze, attention should be paid: before preparing compound antifreeze, the active ingredients, moisture and insolubility of each component of the antifreeze should be mastered The content of the substance should be calculated based on the effective solid content when preparing. When preparing the compound antifreeze solution, it should be stirred evenly. If there is freezing or precipitation, the solutions should be prepared separately and added to the mixer separately. There should be no precipitation, suspended matter, or flocculation. The above phenomenon indicates improper formulation. When certain components interact, the component must be found and replaced.
⑥When calcium chloride is used in combination with air-entraining agent or air-entraining water-reducing agent, the air-entraining agent or air-entraining water-reducing agent should be added first, and then stirred Finally, add calcium chloride solution.
⑦ When the product is supplied in the form of powder, the smallest component should be carefully processed during production so that it can be evenly dispersed in the largest component. Coarse-grained raw materials must be prepared first. Crush and then mix. Finally, all the materials should be able to pass through the sieve with aperture of 0.63mm.
⑧Containers storing liquid antifreeze should have insulation or heating equipment.
<img src="/upfile/202210/2022101830586343.jpg"/
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