Contents of this article
When is it necessary to add antifreeze to concrete applications?
At what temperature should antifreeze be added to concrete?
In which month should I start using antifreeze when pouring concrete in winter? Is there any basis for this?
At what temperature is antifreeze usually used on concrete?
When should antifreeze be added to cement mortar in winter?
When to add early strength antifreeze?
When is it necessary to add antifreeze to concrete applications?
Concrete antifreeze is designed and developed based on winter application temperature conditions, commercial concrete pumping, and inhibiting alkali aggregate reaction. It uses high-concentration high-efficiency water-reducing agent as the water-reducing component, and contains alkali. Low and high water reduction rate, it can accelerate the condensation and hardening of concrete under negative temperature conditions. The strength increases significantly and does not affect the development of later strength. Chloride-free salt avoids corrosion of steel bars and improves the durability of concrete.
At what temperature should antifreeze be added to concrete?
It is necessary to add antifreeze at minus 5 degrees Celsius. Antifreeze concrete is a substance that hardens at negative temperatures and achieves expected performance under prescribed 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. for anti-freezing effect. Used for various concrete projects and during construction in cold seasons. Allows concrete to hydrate normally in a negative temperature environment of 0°C to -15°C; lowers the freezing point and improves the early strength of concrete.
In which month should I start using antifreeze when pouring concrete in winter? Is there any basis for this?
Please note that there is no ‘winter construction’ in all specifications, but ‘winter construction’! Winter is a quarter of the year. December, January, and February are fixed in the Gregorian calendar. However, the temperature difference between the south and the north is too great to use this term. ‘Winter construction’ refers to ‘winter construction’ when the outdoor daily average temperature is stable below 5°C for 5 consecutive days. In addition to the use of antifreeze, there are many prescribed measures for 'winter construction', see Chapter 10, Section 10.2 of GB50666-2011 "Construction Specifications for Concrete Structure Engineering". This is the main normative basis.
At what temperature is antifreeze usually used on concrete?
When concrete antifreeze is constructed at 0~ -5℃, 4~6% can be added; when constructed at -5~ -10℃, 5~8% can be added; -10~ - For construction at 15℃, 8~10% can be added. The lower the service temperature of concrete, the better the antifreeze effect of the antifreeze. The concrete has more time (including negative temperature areas) to grow in strength, thereby greatly increasing the possibility of reaching critical anti-freeze strength. The usage standard is the dosage corresponding to the temperature. The temperature is above zero within 24 hours, and then below minus 2°. It has little effect on the concrete, but the concrete surface should be covered with insulation materials.
When should antifreeze be added to cement mortar in winter?
1.
Winter construction will begin when the average temperature is below 5 degrees for 10 consecutive days. Antifreeze will be added to concrete construction when the temperature is below 0 degrees
2.
Standardly speaking, when the daily average temperature of the concrete is below 5 degrees for 5 consecutive days, the concrete will enter winter construction and antifreeze must be added.
Different cement antifreezes can withstand different temperatures. Some can withstand minus 20 degrees Celsius, while others can withstand minus 30 degrees Celsius.
When Add early antifreeze?
The dosage of Gallux early-strength antifreeze is 3%~5% for cement. When the temperature is about -5 degrees, the optimal dosage is 4%; when the temperature is about -10 degrees When the temperature is -15 degrees, the optimal dosage is 5%; when the temperature is -15 degrees, it is appropriate to mix 4% to 6%. Can be added directly to the blender for use. The mixing time should be appropriately extended by 1 to 2 minutes.
This agent has a water-reducing effect. The actual amount of water added can be determined through trial mixing according to the required mortar consistency requirements.
The ambient temperature should be kept above -5 degrees when plastering</p
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