What is the model of commercial concrete for high rise buildings?

High-rise buildings. The types of commercial concrete are: C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80.

The following principles need to be followed when selecting commercial concrete models for high-rise buildings:

1. When the seismic design, the first-class seismic grade.

Concrete strength grades of frame beams, columns, and their nodes.

It should not be lower than C30.

2. The concrete strength grade of the cylinder structure should not be lower than C30.

3. The concrete strength grade of the basement floor as the embedded part of the superstructure should not be lower than C30.

4. Conversion layer.

The concrete strength grade of floor slabs, conversion beams, conversion columns, box-type conversion structures and conversion slabs should not be lower than C30.

5. Prestressed concrete structure.

The concrete strength grade should not be lower than C40 and should not be lower than C30.

6. The concrete strength grade of steel reinforced concrete beams and columns should not be lower than C30.

7. The concrete strength grade of cast-in-place non-prestressed concrete floor structure should not be higher than C40.

8. During seismic design, the concrete strength grade of the frame column should not be higher than C60 when it is 9 degrees, and it should not be higher than C70 when it is 8 degrees; Shear walls.

The concrete strength grade should not be higher than C60.

Commercial concrete model for high-rise buildings: the model designed by the design unit shall prevail.

Different types of concrete have different strengths and have different uses, which cannot be generalized.

Cxx represents the strength, and C30 represents the standard value of concrete strength is 30MPa or 30N mm2.

Commercial concrete refers to concrete that is used for commercial purposes, such as concrete that can be purchased and purchased. At present, most of the construction uses commercial concrete.

A general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. The word concrete usually refers to the use of cement as cementitious material, sand and stone as aggregates; Cement concrete, also known as ordinary concrete, is widely used in civil engineering engineering by mixing, forming and curing cement concrete obtained by mixing with water (with or without admixtures and admixtures) in a certain proportion.

The most important mechanical properties of concrete after hardening refer to the ability of concrete to resist stresses such as compression, tension, bending, and shear. The water-cement ratio, cement variety and dosage, aggregate variety and dosage, as well as mixing, forming and curing all directly affect the strength of concrete. The strength grade of concrete according to the standard compressive strength (the cube with a side length of 150mm is used as the standard specimen, cured for 28 days under standard curing conditions, and the compressive strength of the cube with a 95% guarantee rate measured according to the standard test method) is called the label, which is divided into C10, C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80, C85, C90, C95, There are 19 grades in C100.

The tensile strength of concrete is only 1 10 1 20 of its compressive strength. Improving the ratio of tensile and compressive strength of concrete is an important aspect of concrete modification.

The concrete varieties and strength in the design drawings and structural design descriptions shall prevail.

Concrete Structure of High-rise Buildings" is the textbook of the "Eleventh Five-Year Plan" for general higher education. The book consists of 10 chapters, including the development and structural system of high-rise buildings, the basic regulations and layout principles of high-rise building structures, the load and role of high-rise building structures, high-rise building structure analysis, frame structure design, shear wall structure design, frame shear wall structure design, simplified structure design, high-rise building structure foundation design, building structure analysis methods and design software, etc., and each chapter is accompanied by thinking questions and exercises to consolidate the knowledge learned. "Concrete Structure of High-rise Building" organically combines conceptual design, calculation methods and related specifications, and is closely related to the needs of actual engineering, with clear concepts and excellent development.

Commercial concrete for high-rise buildings is a type of: C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80.

The following principles need to be followed when selecting commercial concrete models for high-rise buildings:

1. During seismic design, the concrete strength grade of frame beams, columns and their nodes should not be lower than C30.

2. The concrete strength grade of the cylinder structure should not be lower than C30.

3. The concrete strength grade of the basement floor as the embedded part of the superstructure should not be lower than C30.

4. The concrete pure rock strength grade of the conversion floor slab, conversion beam, conversion column, box-type conversion structure and conversion thick plate shall not be lower than C30.

5. The concrete strength grade of the prestressed concrete structure should not be lower than C40 and should not be lower than C30.

6. The concrete strength grade of steel reinforced concrete beams and columns should not be lower than C30.

7. The concrete strength grade of cast-in-place non-prestressed concrete floor structure should not be higher than C40.

8. During seismic design, the concrete strength grade of the frame column should not be higher than C60 when it is 9 degrees, and it should not be higher than C70 when it is 8 degrees; The concrete strength grade of the shear wall should not be higher than C60.

Summary. High-rise building concrete is generally used in 425 grade, if you use on the basis of the 425 grade of cement may be higher, but if you use these 425 grade cement in the family is not impossible, just feel a little waste, in the home decoration of the concrete used is nothing more than to make a small strong body, there is no need to use such a high grade.

High-rise building concrete is generally used in 425 marks of seepage, if you use on the basis of the 425 grade of cement may be higher, but if you use these 425 grade cement in the home cluster is not impossible, just feel a little waste, the concrete used in the home decoration is nothing more than to make a small strong body, there is no need to use such a high grade.

This is my answer, I hope it is helpful to you, thank you <>