What are the advantages of using aerated concrete blocks in high rise buildings and hollow bricks in

Aerated concrete is made of siliceous materials and calcareous materials as the main raw materials, miserable gas agent, stirred with water, formed by chemical reaction pores, pouring molding, pre-nurture cutting, autoclaved curing and other processes to form porous Portland concrete, the following by Xinhai Machinery for you to tell the advantages of aerated concrete blocks for high-rise buildings.

1. Light weight.

The dry bulk density of aerated concrete is generally 400-700kg m3, relative to the 1 3 of clay bricks, 1 5 of ordinary concrete, and is also lower than the general light aggregate concrete and hollow blocks, hollow clay bricks and other products, therefore, the use of aerated concrete as wall material can greatly reduce the weight of the building, and then can reduce the size of the foundation and beam and column structure of the building, save building materials and engineering costs, and can also improve the seismic capacity of the building.

2. Good thermal insulation performance.

The aerated concrete has a large number of tiny pores inside, so it has good thermal insulation performance, and the thermal conductivity of aerated concrete is usually 1 4-1 5 of clay bricks, and 1 5-1 10 of ordinary concreteUsually the thermal insulation effect of 20cm thick aerated concrete wall, compared with 49cm thick ordinary clay brick wall, can not only save heating and cooling energy, but also greatly improve the plane utilization coefficient of the building.

3. It has machinability.

Aerated concrete does not use coarse aggregate, has good machinability, can be sawed, planed, drilled, nailed, and can be bonded with appropriate adhesive materials, which provides favorable conditions for building construction.

4. The raw materials are wide, the production efficiency is carried out, and the production energy consumption is low.

Aerated concrete can be produced with sand, slag, fly ash, tailings, gangue and quicklime, cement and other raw materials, according to the actual local conditions to determine the variety and production process, and can greatly use industrial waste slag, now only power plants in China discharge more than 70 million tons of fly ash every year. Aerated concrete is an excellent product for the indirect utilization of fly ash. The production efficiency of aerated concrete is relatively high, a medium-sized aerated concrete plant, the annual per capita physical labor rate can reach about 600m3, and a few enterprises with a higher degree of automation reach 900-1000m3, which is higher than clay bricks (180m3) and concrete blocks (500-800m3).

The energy consumption of aerated concrete production is low, and the production energy consumption per unit product is only 50% of the energy consumption of the same volume of clay bricks.

Macroscopically speaking, the weight of aerated blocks is slightly lighter than that of hollow bricks, which will reduce the weight of the house, and then reduce the horizontal force brought by **.

However, high-rise buildings are controlled by horizontal loads, and the higher the more obvious, so it is difficult to judge how much to reduce the number of reinforcements and the area of earthwork excavation, and must be calculated.

High-rise buildings generally have a relatively high concrete strength grade, and 325 is the minimum cement grade requirement, so the cement grade cannot be reduced.

The depth of the foundation is related to the height of the upper floors and the geological conditions, and does not decrease due to a slight weight reduction.

The essence of the difference between the two is to reduce the weight of the building. As for how much you mentioned this and that, it depends on the floor space, floor area, building function, foundation and other factors of your building.

For example, is there a difference between building a 10,000-square-meter building and building a 1,000-square-meter building?

Is the same 10,000 square meters of one floor different from 10 floors?

Similarly, is there a difference in the weight of a 10,000-square-meter house and a 10,000-square-meter factory building (which contains many heavy machinery and equipment)?

Is it different to build on a sandy foundation than to build on rock?

Such questions can only be analyzed qualitatively, and others cannot give you specific answers.

Aerated concrete is a lightweight insulation wall material, in areas that are not cold, aerated concrete masonry walls can meet the local building energy saving requirements for wall insulation indicators. In this case, there is no need to do the external insulation layer of the external wall, which belongs to the self-insulating wall.

Non-load-bearing walls can be built with aerated concrete blocks or plates, and the interior walls can of course also be used, and should be used, because although the interior walls do not have the requirements of thermal insulation, the bulk density of aerated concrete is small, which is conducive to reducing the self-weight of the building.

I don't quite understand why you guys use concrete hollow bricks (concrete hollow blocks) for masonry, it doesn't seem reasonable.

In order to prevent moisture In order to resist frost, aerated concrete blocks in cold areas are not frost-resistant after being damp. It is susceptible to freeze-thaw damage.

Concrete blocks have a certain degree of thermal insulation and thermal insulation, so the insulation effect of the exterior wall is better.

The differences between aerated concrete blocks and concrete blocks are as follows:

1. The aerated block is hollow inside, the bulk density is much smaller, and it is generally used as a filling wall, and the self-weight load is relatively small, which is conducive to the structure. Ordinary concrete blocks have a slightly larger bulk density and are generally used in load-bearing walls.

2. The process is also very different, the aerated concrete block is formed by the chemical reaction of raw materials crushing, ball milling, metering, pulping, mixing, pouring, resting, cutting, steaming, and raw materials through high temperature and high pressure. Concrete blocks can be understood as cement concrete blocks, and in popular terms, cement bricks, this kind of masonry is formed by vibration. The thermal insulation and thermal insulation effect of aerated concrete blocks are higher than those of concrete blocks.

Aerated concrete blocks are solid and do not have large holes in the middle.

Concrete hollow blocks can be formed with ordinary concrete, while aerated concrete blocks must be made with uniform particles of small concrete, and the process is complex.

That's the difference between the two.

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Concrete small hollow blocks--- made of crushed (pebble) stones as coarse aggregates, called ordinary concrete small hollow blocks; Or made of coarse aggregates such as pumice, volcanic slag, cinder, coal gangue, ceramsite, etc., which is called light aggregate concrete small hollow block. It is generally used as a bulk material for load-bearing and non-load-bearing walls.

Autoclaved) aerated concrete block--- a block or plate made of silicon and calcium as raw materials, aluminum powder (paste) as initiator, and cured by autoclaving. It can be used as load-bearing and non-load-bearing walls or thermal insulation.

1. The material of hollow brick should be concrete, and the aerated block is fly ash in this material. Relatively speaking, the water absorption rate of the two materials is not the same, and the aerated block has a large water absorption rate and dries slowly.

2. Hollow bricks are used more in exterior walls, hollow can be insulated, waterproof and moisture-proof, and aerated blocks are generally used in the interior walls of non-load-bearing structures.