Jiangsu early-strength antifreeze manufacturer, how long does it take for antifreeze to be added to concrete to prevent it from freezing after pouring?

Contents of this article

• How long does it take to effectively prevent freezing after antifreeze is added to concrete?

• How long does it take to prevent freezing after pouring concrete with antifreeze?

• How long does it take for concrete with antifreeze to solidify?

• What is the validity period of concrete antifreeze?

• What are the working hours of antifreeze and anticondensation?

• How long is the validity period of concrete antifreeze?

• Does the antifreeze admixture come with early strength?

How long is the effective antifreeze time after antifreeze is added to concrete?

The effective anti-freeze time is before the concrete reaches the critical strength to resist frost. After concrete reaches critical strength, it is no longer afraid of freezing, and the antifreeze effect of antifreeze will no longer work. But the premise is that the antifreeze is a qualified product. As for the specific time, it is related to factors such as air temperature, molding temperature, coverage, and maintenance methods, and cannot be generalized.

Antifreeze generally has an antifreeze and early-strength effect. It can lower the freezing point of concrete in winter, does not freeze at low temperatures, and has an early-strength effect, which means it speeds up the setting speed of concrete. If you are talking about a delay in the setting time of adding antifreeze, it should be because the concrete sets slowly due to low temperatures. If it is not mixed, it will easily freeze.

Antifreeze concrete is a substance that hardens at negative temperatures, achieves expected performance under specified 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. to achieve better antifreeze effect. Used for various concrete projects and during construction in cold seasons. Allow the concrete to hydrate normally in a negative temperature environment of 0°C to -15°C; lower the freezing point and improve the early strength of the concrete.

How long does it take to prevent freezing after pouring concrete with antifreeze?

The effective anti-freeze time is before the concrete reaches the critical strength to resist frost. After concrete reaches critical strength, it is no longer afraid of freezing, and the antifreeze effect of antifreeze will no longer work. But the premise is that the antifreeze is a qualified product.

As for the specific time, it is related to factors such as air temperature, molding temperature, coverage, and maintenance methods, and cannot be generalized.

How long will it take for concrete with antifreeze to freeze? solidification?

Generally the initial setting time is 4-10 hours. The dosage of the admixture and the retarding time of the admixture are generally 8 to 12 hours. The admixtures used in the test are not suitable for cement. The main manifestation is that there is less water-reducing component and more retarding component. In this case, in order to achieve good slump and slump loss with time of the concrete mix.

There are many factors that influence the abnormal condensation of cement concrete. Concrete admixtures, cement, admixtures, ambient temperature and wind speed may ultimately lead to the occurrence of abnormal condensation of cement concrete. Judging from the quality of concrete projects at this stage, the type of retarder, improper retarder dosage, incompatibility between admixtures and cement, and ambient temperature are the main reasons for abnormal condensation of cement concrete and even accidents in concrete projects.

What is the validity period of concrete antifreeze?

According to the building materials industry standard JC 475-2004 (replacing JC/T475-1992) antifreeze is defined as: it can harden concrete at negative temperatures and achieve expected performance and sufficient antifreeze strength under specified curing conditions. of admixtures. It is a substance that can prevent moisture in materials from freezing at low temperatures.

Antifreeze has a shelf life, the ordinary one is 2 years, and the long-term one is 3 years.

What are the working hours of antifreeze and anticondensation?

The effective anti-freeze time is before the concrete reaches the critical strength to resist frost. After concrete reaches critical strength, it is no longer afraid of freezing, and the antifreeze effect of antifreeze will no longer work. But the premise is that the antifreeze is a qualified product. As for the specific time, it is related to factors such as air temperature, molding temperature, coverage, and maintenance methods, and cannot be generalized.

Antifreeze generally has an antifreeze and early-strength effect. It can lower the freezing point of concrete in winter, does not freeze at low temperatures, and has an early-strength effect, which means it speeds up the setting speed of concrete. If you are talking about a delay in the setting time of adding antifreeze, it should be because the concrete sets slowly due to low temperatures. If it is not mixed, it will easily freeze.

How long is the validity period of concrete antifreeze?

The effective anti-freeze time is before the concrete reaches the critical strength to resist frost. After concrete reaches critical strength, it is no longer afraid of freezing, and the antifreeze effect of antifreeze will no longer work. But the premise is that the antifreeze is a qualified product. As for the specific time, it is related to factors such as air temperature, molding temperature, coverage, and maintenance methods, and cannot be generalized.

Does the antifreeze admixture come with early strength?

No!

Admixtures that accelerate the early strength development of concrete become early strength agents. Admixtures that can harden concrete at negative temperatures and achieve sufficient antifreeze strength within a specified time are called antifreeze. Early strength agent is an admixture that improves the early strength of concrete. Antifreeze is an admixture that lowers the freezing point of water so that concrete can solidify and harden at negative temperatures.

Each has its own role. Nowadays, in general projects, composite antifreeze is used, that is, early-strength antifreeze. </p