What is the minimum degree of concrete antifreeze? What are the strength levels of concrete? Anhui concrete antifreeze manufacturer

Many people around us know the existence of concrete, but people will also encounter many problems when using concrete. Concrete antifreeze is known to many people, and The use of concrete is very common in life. When using concrete, people must know specific common sense. What is the minimum degree of concrete antifreeze? What are the strength levels of concrete?

Many people around us know the existence of concrete, but people will also encounter many problems when using concrete. Concrete antifreeze is a problem that many people We all know it, and the use of concrete is very common in life. When using concrete, people must know specific common sense, so that they can use concrete better. Today let’s take a look at how much antifreeze is used in concrete? What are the strength levels of concrete?

What is the concentration of concrete antifreeze? What are the strength levels of concrete?

How much is the antifreeze for concrete?

Generally, antifreeze is needed when the temperature is 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.

What is the concentration of concrete antifreeze? What are the strength levels of concrete?

What are the strength grades of concrete

1. Concrete strength grade

According to the national standard GB50010-2002 "Code for Design of Concrete Structures", the concrete strength grade should be determined according to the standard value of cube compressive strength. The standard value of cube compressive strength refers to the compressive strength of a cube specimen with a side length of 150mm that is produced and maintained according to standard methods and measured with standard test methods at 28 days of age with a 95% guarantee rate, expressed in fcu,k .

Ordinary concrete is divided into fourteen strength grades: C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70 , C75 and C80. Concrete strength grade is an important basis for concrete structure design, construction quality control and project acceptance. Different construction projects and building parts require concrete with different strength levels, and generally there is a certain range of selection.

2. Concrete strength grade selection range

Different construction projects, different parts often Concrete of different strength levels is used. Under the current level of concrete engineering in my country, the general selection range is as follows: ① C10 ~ C15 - used for cushions, foundations, floors and structures with little stress. ②C20～C25——Used for ordinary reinforced concrete structures such as beams, slabs, columns, stairs, roof trusses; ③C25～C30——Used for large-span structures, structures requiring high durability, prefabricated components, etc.; ④C40～C45——Used Used in prestressed reinforced concrete components, crane beams and special structures, etc., used for 25 to 30 floors; ⑤C50～C60 - used for high-rise buildings with 30 to 60 floors or above; ⑥C60～C80 - used for high-rise buildings, using high performance Concrete; ⑦C80～C120——Ultra-high-strength concrete is used in high-rise buildings. In the future, the use of concrete up to C130 and above may be promoted. Concrete is divided into several strength grades according to strength. The strength grade of concrete is divided according to the standard value of cube compressive strength fcu,k. The standard value of cubic compressive strength is a value in the overall distribution of cubic compressive strength. The percentage of strength lower than this value does not exceed 5%, that is, there is a 95% guarantee rate.

What is the concentration of concrete antifreeze? What are the strength levels of concrete? After the specific description above, everyone has found the answer. When using concrete, professional technology must be used to obtain the best effect. Therefore, every small detail around us needs to be paid attention to so that the concrete can be delivered. to achieve the desired effect.