What are the testing items of concrete solid bricks

1. Compressive strength.

Concrete strength.

The assessment should be carried out in batches of the same acceptance batch of concrete application strength grade, the same mix ratio and production process of the same mixed concrete composition, cast-in-place concrete according to the sub-project.

Divide the acceptance batch, and divide the precast concrete components into batches on a monthly basis.

2. Flexural strength.

If there is a flexural strength requirement, the indwelling requirements of the bending strength should be the same as that of the front concrete and compressive strength specimens.

3. Frost resistance.

The frost resistance of concrete refers to the ability of concrete to maintain its strength and appearance integrity during multiple freeze-thaw cycles in the use environment.

4. Impermeability.

Impermeability refers to the ability of concrete to resist the penetration of pressurized water (or oil).

5. Erosion resistance.

The erosion of concrete by environmental medium is mainly the erosion of cement stone, usually soft water erosion, acid, alkali and salt erosion.

The test items of concrete solid bricks are generally the detection strength, appearance size, and bulk density.

Concrete: Concrete, abbreviated as "concrete (tóng)": refers to the collective term for engineering composite materials that cement aggregates into a whole.

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 when it is mixed with water (which can contain admixtures and admixtures) in a certain proportion and is mixed to obtain cement concrete. Concrete refers to a mixture made of cementing materials (organic, inorganic or organic-inorganic composites), granular aggregates, water, chemical admixtures and mineral admixtures that need to be added in appropriate proportions, or composite materials with a stacking structure after hardening (usually cementitious materials, water, fine aggregates, coarse aggregates, admixtures and mineral admixtures when necessary, and matched in appropriate proportions).

Generally, it is the detection strength, appearance size, and bulk density.

The batch of concrete solid bricks submitted for inspection is 390*90*190 small hollow blocks with specifications of 1 group per 10,000 pieces for sampling, and the number of small blocks for multi-storey building foundations and bottom floors is not less than 2 groups and 3 pieces per group.

Generally, gravel and pebbles should comply with the provisions of GB T 14685, and their maximum particle size should not be greater than 15mm. According to the density of the concrete itself, it is divided into three density grades: grade A (2100kg), grade B (1681kgm 2099kgm) and grade C (1680kgm).

Performance Notes. 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 is divided 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 guarantee rate of 95% is measured according to the standard test method).

According to the "Concrete Solid Brick" GB T21144-2007 page 6 10 regulations:

The small hollow blocks with specifications of 390*90*190 are sent for inspection and 1 group for every 10,000 pieces of sampling, and the number of small blocks for sampling inspection of the foundation and bottom layer of multi-storey buildings is not less than 2 groups, and 3 blocks per group.

Take a group of 150,000 pieces, and each group of 10 pieces. This is from Shanghai.

A batch of 100,000 pieces, less than 100,000 will be sent for inspection according to 100,000.

For details, please refer to "Concrete Solid Brick" GB T21144-2007

Specifications are 240mm 115mm 53mm, compressive strength grade is MU25, density grade is grade B, qualified concrete bricks: SCB240 115 53MU25BGB T21144-2007;

Knowledge Expansion: Density Levels.

According to the density of the concrete self-emptying shed, it is divided into three density grades: A-level bucket (2100kg), B-level (1681kg, 2099kg) and C-grade (1680kgm).

Intensity rating. The compressive strength of bricks is divided into six grades: MU40, MU35, MU30, MU25, MU20, and MU15.

Mark. Products are marked in the following order: code, size, strength grade, density grade, and standard number.

Concrete solid brick appearance quality evaluation standard pro! Hello, I am glad to answer for you<> the appearance quality evaluation standard specifications of pro-concrete solid bricks are 240mm 115mm 53mm, the compressive strength grade is MU25, the density grade is grade B, and the qualified concrete bricks: SCB240 115 53MU25BGB T21144-2007; , Knowledge Expansion:

Density grade, according to the density of the concrete itself is divided into grade A (2100kg m), grade B (1681kg m 2099kg m) and grade C (1680kg m) three density grades, strength grade, brick compressive strength is divided into MU40, MU35, MU30, MU25, MU20, MU15 six grades, marked, products are marked in the following order: code, specification scale roll core size, strength grade, density grade and standard number. MU15 solid bricks are concrete bricks with a compressive strength of 15MPa.

Compressive strength (compressive strength) is codenamed BC, which mainly refers to the external force is a limit of the strength under pressure. The main lead of concrete bricks is cement and aggregate, as well as some admixtures, admixtures, etc., which are added as needed, and then mixed with water, formed and cured to support the concrete solid bricks. Hope mine can help you <>

Do you have any other questions?

Summary. Dear, I am glad to answer for you: What is the batch size of concrete solid bricks?

A: A batch of 100,000 yuan, less than 100,000 yuan will be sent for inspection according to 100,000 yuan. For details, see "Concrete Solid Brick" GB T21144-2007 concrete solid brick (hereinafter referred to as brick) supported by cement, aggregate, admixture, admixture, etc. added as needed. It is mainly used for masonry walls.

In recent years, it has become more and more widely used.

Dear, I'm glad to answer for you: Is the batch of concrete solid bricks sent for inspection more excited and less? Answer: A batch of 100,000 yuan, less than 100,000 yuan will be sent for inspection according to 100,000 car cavities.

For details, see "Concrete Solid Brick" GB T21144-2007 Concrete closed shirt solid brick (hereinafter referred to as brick) supported by cement, aggregate, and admixtures and admixtures added as needed. It is mainly used for masonry walls. In recent years, it has become more and more widely used.

The inspection is a few bricks.

A batch of 100,000 pieces, less than 100,000 will be sent for inspection according to 100,000.

The samples sent for testing are a few bricks.

30 pieces will be drawn for each batch.

40 pieces were routinely tested, representing a number of 150,000. Standard NY T671-2003 GBT2542-2004 has above.

Specifications are 240mm 115mm 53mm, compressive strength grade is MU25, density grade is grade B, qualified concrete bricks: SCB240 115 53MU25BGB T21144-2007;

Knowledge Expansion: Density Levels.

According to the density of the concrete itself, it is divided into three density grades: grade A (2100kg), grade B (1681kgm 2099kgm) and grade C (1680kgm).

Intensity rating. The compressive strength of bricks is divided into six grades: MU40, MU35, MU30, MU25, MU20, and MU15.

Marked products are marked in the following order: code, size, strength grade, density grade, and standard number.