How to calculate the MU of bricks in the test specimen

This has to calculate the area according to the size of the specimen, and calculate the tonnage of the testing machine to use according to the strength of the area and the material. The sintered brick should be 20mpa(Contact stress surface size 240*115mm)*20MPa = maximum test force, that is, how large tonnage of the testing machine.

Swing to square, calculate the volume, and divide by the volume of the individual pieces. This will only be possible with a single-digit discrepancy.

The general specifications of cement bricks are 390 190 190m MU30, MU25, MU20, MU15 and MU10. With the increase in the use of cement bricks in modern buildings, the strength and quality of cement bricks are highly valued by the relevant departments of the state, and each cement brick factory is required to be equipped with cement brick compressive strength testing equipment in the laboratory to strictly test the quality, so as to adjust the process in time and strictly control the quality.

Cement brick press, also referred to as cement brick pressure testing machine, this equipment can test the compressive strength of cement bricks, and can also detect high-strength bricks and standard bricks. Or such as: hollow blocks, solid standard bricks, aerated concrete blocks and other building materials, fully meet the needs of modern brick factories, to save investment for customers to the greatest extent.

The bulk density of plain concrete has little to do with its strength grade, which is about. (2350~2380kg/m³)。The state does not have "concrete standard bricks".

If it is a standard brick, different raw materials, different proportions, the weight is different, ranging from kilograms to 3 kilograms.

Cement: powdered hydraulic inorganic cementitious material. After adding water and stirring into a slurry, it can be hardened in air or better hardened in water, and can firmly cement sand, stone and other materials together.

The word cement is derived from the Latin word caementum, which means crushed stone and flake. The mixture of early lime and pozzolana was similar to that of modern lime pozzolana cement, and the concrete made from cemented crushed stone was not only strong when hardened, but also resistant to the erosion of fresh or salt water. For a long time, as an important cementitious material, it has been widely used in civil construction, water conservancy, national defense and other projects.

The ratio depends on the specific type of raw materials used and its **, and the testing standards are mostly based on JC239-2001, but the standards in some regions are more demanding, mainly depending on the actual standards in various places.

The testing standards are mostly based on JC239-2001, and the ratio depends on the specific types of raw materials used and their standards, while the standards in some regions are higher, mainly depending on the actual standards in various places.

1. In-situ axial compression method.

Purpose: To test the compressive strength of ordinary bricks and perforated brick masonry.

2. Flat top method.

Purpose: To test the compressive strength of ordinary bricks and perforated brick masonry.

3. Cutting compressive specimen method.

Purpose: To test the compressive strength of ordinary bricks and perforated brick masonry.

4. In-situ single shear method.

Uses: To test the shear strength of various brick masonry.

5. In-situ single-brick double-shear method.

Uses: To test the shear strength of sintered ordinary bricks and sintered perforated bricks, and other walls should be tested to determine the relevant conversion coefficients.

6. Launch method.

Uses: To test the mortar strength of sintered ordinary bricks, sintered perforated bricks and autoclaved lime sand brick walls.

7. Cylinder pressure method.

Purpose: To detect the mortar strength in sintered ordinary bricks and sintered perforated brick walls.

8. Mortar sheet shearing method.

Purpose: To detect the strength of mortar in sintered ordinary brick walls.

9. Mortar rebound method.

Uses: 1) Mainly used for mortar strength homogeneity survey;

2) Detect the mortar strength in the walls of sintered ordinary bricks and sintered porous bricks.

10. Point charge method.

Purpose: To detect the mortar strength in sintered ordinary bricks and sintered perforated brick walls.

11. Mortar sheet local pressure method.

Purpose: To detect the mortar strength in sintered ordinary bricks and sintered perforated brick walls.

12. Sintered brick rebound method.

Purpose: To detect the strength of bricks in sintered ordinary bricks and sintered porous brick walls.

13. Penetration method.

Uses: The compressive strength of masonry mortar is not suitable for the detection of surface damage such as high temperature, frost damage, chemical erosion, fire, etc., as well as the detection of mortar constructed by freezing method in the stage of strength recovery.

"Standard for Test Methods for Basic Performance of Building Mortar" (JGJ T70-2009).

MU20 indicates that the compressive strength of this block is 20MPa(MU20 is the average compressive strength.)

mu: mu is an abbreviation for masonry unit in construction, which means block. Use (mu + number) to represent the strength grade of the brick, compressive strength. For example, MU10 means that the compressive strength of the brick is 10MPa.

The strength grade of the block and mortar shall be adopted in accordance with the following provisions:

1. Strength grades of sintered ordinary bricks, sintered perforated bricks, etc.: MU30, MU25, MU20, MU15 and MU10;

2. Strength grades of autoclaved lime sand bricks and autoclaved fly ash bricks: MU25, MU20, MU15 and MU10;

3. Strength grades of blocks: MU20, MU15, MU10, and MU5;

4. Stone strength grades: MU100, MU80, MU60, MU50, MU40, MU30 and MU20;

5 Strength grade of mortar: M15, M10, and.

Stone MU20 indicates that the compressive strength of this stone is 20MPa

mu: mu is an abbreviation for masonry unit in construction, which means block. Use (mu + number) to represent the strength grade of the brick, compressive strength. For example, MU10 means that the compressive strength of the brick is 10MPa.

So the MU20 is 20MPa

I have been engaged in crusher sales for many years, and I have an understanding of the properties of various properties of stone, if you think you can contact me!

Hope it helps.

Well, mu is the strength marker, as for why I use mu, I don't know.

MU75 was the old marker, and it is now.

Mortar is represented by m, which also indicates the strength mark.

Explanation of the Code for the Design of Masonry Structures (GB50003-2001): MU - Strength Rating of Blocks. Abbreviation for "masonry unit" in English.

The strength code of the brick. It can also be the strength code of the stone.

mu is the code name for the strength grade of the brick.