Can bricks be laid under the concrete cushion, and why should the concrete be cushioned

Pad bricks are OK, but the strength of the bricks should meet the requirements. If the foundation is not good, it is recommended to replace the gravel, there is no need to lay bricks, it is expensive and difficult to pave.

There is an explanation in the building structure course, if there is no large active load on the ground of the building, the floor of the building can be paved with broken bricks, and then poured plain concrete with a mark above C10, if there is a large live load, reinforcement is required, but there is a certain amount of slurry to ensure that the force is uniform.

Yes, we call this a brick mold, and it is useful in construction. For example, during foundation construction, you can't directly put the concrete on the ground. Just lay a layer of bricks on the ground There is also a project budget

It's better not to use it, the strength of brick is not as high as that of concrete.

Yes, but not recommended, it is best to use gravel. If you want to fill it very thick, rubble concrete is also a good choice, but rubble concrete is not as good as gravel or gravel because it will cause local stiffness

Of course you can, it will be stronger.

Yes, this alone does not reduce the thickness of the underlayment.

No, concrete cushion is fine, no!

There are gaps between the bricks, which are fragile, increase the cost, and are not recommended.

If it is not for the reinforcement of the foundation, there is no can't, but there is no need.

Sure, the soil under the cushion is generally tamped, and the brick pad must be under it, but the soil under the brick should also be tamped.

Grasp a principle: the strength of the backfill material must be greater than the holding layer.

1. Concrete cushion.

The middle layer of reinforced concrete foundation and foundation soil, when the water stability of the soil foundation is poor, is used to improve the water stability of the soil foundation, improve the water stability and frost heave resistance of the pavement structure, and can diffuse the load to reduce the deformation of the soil foundation.

2. The concrete cushion plays the role of leveling, isolation and transition. It is convenient for the construction of the pay-off and the support of the foundation formwork, so as to ensure the effective position of the foundation bottom plate reinforcement and the good control of the protective layer. It is convenient for the bottom surface of the foundation to be used as an anti-corrosion layer.

Points to note in cushion concrete construction.

1. The cushion concrete C10 (basement part C15) is 100mm thick and the perimeter is 100mm. Cushion construction, according to the construction section of the sectional construction, the periphery with 100 100mm wood as a formwork.

Second, the cushion construction sequence.

The construction is also carried out in accordance with the flow section, but it should be in the same order as the earthwork construction, and the earthwork construction is completed, and the groove is inspected.

If qualified, immediately carry out the construction of the cushion town of the corresponding part.

3. In the pouring process, the uniformity and compactness of the concrete should be controlled. In the pouring process, if it is found that the uniformity and consistency of the concrete mixture have changed greatly, an appropriate amount of water reducing agent should be added.

or return the treatment method, it is strictly forbidden to add water when the consistency of the concrete is large. The cushion concrete is vibrated with a plate vibrator.

Fourth, when pouring concrete, attention should be paid to prevent the delamination and segregation of concrete. When pouring concrete and false soil, the condition of the formwork should be often observed, and when it is found that there is deformation and displacement, the pouring should be stopped immediately, and the concrete that has been poured should be trimmed intact before setting.

The underlay refers to the structural layer located below the base layer. Its main function is to improve the working conditions of the base and soil foundation by water insulation, drainage and anti-freezing, and its water stability requirements are good.

The cushion is located in the structural layer between the base layer and the soil foundation, and when the soil foundation water stability is poor, it is used to improve the water stability of the soil foundation, improve the water stability and frost heave resistance of the pavement structure, and can diffuse the load to reduce the deformation of the soil foundation. Therefore, it is usually set when the soil base is wet and the temperature condition is poor. The strength of the cushion material is not necessarily high, but its water stability must be good.

The underlayment is usually concrete.

Concrete cushion is the intermediate layer of reinforced concrete foundation and foundation soil, the function is to make its surface smooth and convenient to bind steel bars on it, and also play the role of protecting the foundation, all are plain concrete, no need to add reinforcement. If there is a reinforcement, it cannot be called a cushion and should be regarded as a foundation slab. Protective layer of stressed reinforcement of reinforced concrete foundation:

40mm when there is a cushion; 70mm without underlayment.

Concrete cushion construction is the simplest construction part of engineering construction, because it is plain concrete, so it is mainly on the geometric size, position, elevation can be effectively controlled, the specific process is as follows:

Measurement and pay-off - slotting - cleaning and leveling the bottom of the trough - drainage at the bottom of the trough (if any) - vertical side mold - installation of chute or branch pump truck - pouring concrete - smoothing and closing - covering and sprinkling curing.

The reason for the concrete cushion layer, 1. The intermediate layer of the concrete cushion reinforced concrete foundation and the foundation soil is used to improve the water stability of the soil foundation of the excavation shed when the soil foundation is in poor condition, improve the water stability and frost heave resistance of the pavement structure, and can diffuse the load to reduce the deformation of the soil foundation; 2. The concrete cushion plays the role of leveling, isolation, and judgment transition, which is convenient for the construction of the pay-off and support of the foundation template, ensuring the effective position of the foundation bottom plate reinforcement, and the protective layer is well controlled.

1) According to the design strength grade of concrete, the concrete test is matched to determine the concrete mix ratio.

2) insert steel rods at the four corners and copy out the cushion ash elevation, and pull the white line from this elevation to adjust and reinforce, and the original soil surface will be evenly sprinkled and moistened 1-2 hours in advance before the cushion is poured, so as to prevent cracks on the surface of the cushion caused by premature loss of water in the concrete.

3) Selection of raw materials.

The cement is ordinary Portland or slag cement with low heat of hydration. The stone is made of continuous graded gravel, with a mud content of less than that, and it is strictly forbidden to contain sundries. The sand is medium sand, with a mud content of less than 2% and no sundries.

The slump is controlled between 120 and 160mm. In the case of meeting the use conditions, try to reduce the slump of the concrete and avoid cracks on the concrete surface.

4) Pouring and curing of concrete.

1) When pouring concrete, ensure that the concrete vibrates fully and does not segregate.

2) The concrete worker should carefully implement the vibrating procedure; No leakage or over-vibration.

3) Ensure that there is no delamination on the surface of the concrete.

4) within 12 hours after the concrete is poured, the concrete is covered and cured; The number of watering and curing should be able to keep the concrete in a moist state, and the curing time should not be less than 7 days.

5) Quality standards for concrete.

1) The surface is smooth, clean and consistent in color;

2) Square edges and corners, straight lines, accurate size;

3) There are no obvious bubbles on the surface, no abrasive belt and black spots;

4) There is no honeycomb, hemp surface and crack phenomenon on the surface.

The above is collected and sorted out by Zhongda Consulting Mausoleum.

Summary. Dear, concrete blocks should be covered with pads.

Dear, concrete blocks should be covered with pads.

The centralized stacking site shouts that Cong Sakura must be "covered and mated", that is: Zheng Cong adopts the method of building a shed above, and the outer eaves of the shed exceed the outer edge of the Zheng Bi block by at least 1m, which is effective against rain; The lower part is paved with square wood + formwork, and the platform is at least 10cm higher than the perimeter, and can effectively drain water.

Sand aerated concrete block: the strength grade is the cube compressive strength mountain answer, and the bulk density grade is B05 (dry bulk density is 500kg m3); Use Henghui M5 cement mortar or MA5 special binder for masonry.

The concrete blocks on the market generally include small hollow blocks of Pujilingtong concrete, small hollow blocks of light aggregate concrete, autoclaved aerated concrete blocks, and foam concrete blocks. Concrete blocks have the advantages of high strength, light weight, convenient masonry coarse lead section, good wall flatness, and high construction efficiency.

Okay, thank you, thank you

You are welcome. than the heart].