1, the bulk density is light, which can reduce the weight and cost of the building and help improve the seismic capacity of the building.
Generally, the bulk density of aerated concrete is 500-850kg/m3, while the bulk density is above 450kg/m3, and its weight is only 1/4 of clay brick and 1/4 of ordinary concrete. It is an ideal lightweight material for high-rise buildings, super-high-rise buildings and large-space structures, which can reduce the self-weight of buildings 1000kg.
Lightweight of buildings can greatly improve the seismic performance of buildings, because earthquakes are the product of building quality and acceleration caused by earthquakes. Obviously, light buildings have low mass and low seismic force. 2. Aerated concrete with good thermal insulation performance and low thermal conductivity has a bulk density of 400-800 kg/m3, and its thermal conductivity is usually 0.
08-0。 Between 15 kcal/m * and * degrees, it is only 1/4- 1/5 of the thermal conductivity of clay brick and1/5 of ordinary cement concrete.
24 cm thick aerated concrete block wall is used in the north. Its thermal insulation effect is equivalent to a brick wall with a thickness of 49 cm.
3. Machinability It can be machined like wood, sawed, planed, drilled and nailed, which is beneficial to construction and can be used on site. 4. The aerated block has high compressive strength. The test shows that the compressive strength of the aerated block is more than 25 kg/cm2, which is equivalent to that of clay brick 125 and lime-sand brick.
2. What are the main standards of aerated brick?
Aerated brick mainly adopts standard 1.
GB/T 1 1968-2006 autoclaved aerated concrete block 2. GB？ 15762-2008 autoclaved aerated concrete slab 3.
JC/T 409-200 1 fly ash for silicate building products 4. JC/T 622- 1996 Sand 5 for silicate building products.
JC/T 62 1- 1996 Lime 6 for silicate building products. JC/T407-2000 Aluminum paste 7 for aerated concrete.
GB？ 175-2007 ordinary portland cement 8. GB/T 1 1969-2008 performance test method for autoclaved aerated concrete 9.
GB/T 176- 1996？ Chemical analysis method of cement 10. GB 1345- 199 1？ Test method for fineness of cement (80um sieve analysis method) 1 1.
JC/T 855- 1999？ Test method for rust resistance of autoclaved aerated concrete slab 12 steel coating. JC？ 890-200 1? Masonry mortar and plastering mortar for autoclaved aerated concrete, in which the standard number is GB 1 1968-2006. Standard name: current English name: autoclaved aerated concrete block replacement: GB/T1968-/kloc-0.
Self-made lightweight aerated bricks are often used in the decoration of hotels, hotels, offices, shopping malls, schools, karaoke bars and other places. It has the main performance characteristics of sound insulation, energy saving, heat preservation, light weight and economy. Of course, this is also a great advantage of aerated brick.
Aerated bricks are not only aerated bricks, but also foam bricks and lightweight bricks. Because fly ash and sandstone are used as raw materials, the shrinkage value of masonry is small, which ensures that the wall will not crack.
Moreover, aerated brick is porous structure, which has obvious influence on air permeability. Environmental protection, earthquake resistance, fire prevention, durability and easy processing.
3. What are the advantages of aerated block?
When the temperature of aerated concrete is lower than 600℃, its compressive strength increases slightly, and when the temperature is around 600℃, its compressive strength is close to room temperature, so the fire resistance of aerated concrete as a building material reaches the national first-class fire protection standard.
Aerated concrete with good thermal insulation performance and low thermal conductivity has a bulk density of 400-800 kg/m3, and the thermal conductivity is usually 0. 08-0。
Between 15 kcal/m * and * degrees, it is only 1/4- 1/5 of the thermal conductivity of clay brick and1/5 of ordinary cement concrete. 24 cm thick aerated concrete block wall is used in the north.
Its thermal insulation effect is equivalent to a brick wall with a thickness of 49 cm. Machinability It can be machined like wood, sawed, planed, drilled and nailed, which is beneficial to construction and can be used on site.
The aerated block has high compressive strength. Through experiments, the compressive strength of aerated block is more than 25 kg/cm2, which is equivalent to that of clay brick 125 and lime-sand brick. When the temperature of aerated concrete is lower than 600℃, its compressive strength increases slightly, and when the temperature is around 600℃, its compressive strength is close to room temperature, so the fire resistance of aerated concrete as a building material reaches the national first-class fire protection standard.
Light bulk density can reduce the weight and cost of buildings, which is beneficial to improve the seismic capacity of buildings. Generally, the bulk density of aerated concrete is 500-850kg/m3, while the bulk density is above 450kg/m3, and its weight is only 1/4 of clay brick and 1/4 of ordinary concrete. It is an ideal lightweight material for high-rise buildings, super-high-rise buildings and large-space structures, which can reduce the self-weight of buildings 1000kg.
What details should be paid attention to when using aerated block equipment?
Aerated block equipment products must comply with the following requirements when using, otherwise errors may occur.
The specific details are as follows: 1. When building aerated block equipment, please remember to follow the relevant national standards and strictly follow the relevant national regulations. In addition, remember to arrange the construction period of aerated block equipment reasonably, and never rush to work blindly in pursuit of progress. If possible, you should try to avoid the rainy season. Second, when laying mortar, we must remember to choose a special mortar with good viscosity, and the strength of the special mortar must not be lower than M5. At the same time, we must ensure that this special mortar product has good water retention performance. Of course, if possible, you can choose dry powder mortar.
Third, in order to ensure that there will be no cracks between the wall and the main structure due to temperature changes, remember to bury steel bars at the joint between the wall and the block. Fourth, if the height or span of the wall is too large, beams and columns should be set in the middle of the wall.
Fifth, we should also pay attention to the junction between the window and the windowsill, because this junction is the most concentrated part of the stress, which is prone to cracks. So I suggest you build some concrete on the windowsill to prevent deformation. Sixth, the aerated block equipment of aerated concrete can not be built together because of the different density and strength grades.
In addition, attention should also be paid to mastering the water content when laying. Seventh, after the wall is built, everyone must remember to do a good job of rain and sun protection.
5. What is the profit of aerated block?
What is the annual profit of the aerated block production line with an annual output of 300 thousand cubic meters? Calculation table of raw material cost per unit product of aerated concrete block: A. Fly ash: See the following table for material serial number, unit consumption per cubic meter, unit price of raw materials (yuan/ton), itemized cost (yuan/cubic meter)/1 fly ash T0.3643301.5922 lime T0./kl. 97 230 27.53l 3 cement t 0.057450 16 (yuan/kg) 7.2 6 H2O t 0.4 2 0.8 7 0.300 kg waste engine oil.
6. Does the aerated block equipment need natural maintenance?
Autoclaved curing is not required for aerated block equipment, so how long will it take for natural curing? Aerated block equipment technician will introduce the production technology of non-steaming aerated block equipment for you.
Mixed raw materials of aerated block equipment: cement and fly ash (fine sand or stone powder, etc. ) according to a certain proportion by automatic dosing machine or manual method. The prepared raw materials are sent to the main engine through an automatic feeder (conveyor or small loader), additives and foaming agents are added to the main engine according to a certain proportion, fully stirred and processed, and then injected into the silo. Then, the semi-finished products in the silo are poured into each mold box by an automatic pouring machine. After pouring, it usually takes 24 hours for initial molding. Aerated block equipment processing professional production, mass production of high-quality aerated blocks. In fact, you can find the answers to many related questions in Baidu Deyi Heavy Industry Association. I hope my answer can help you, and I hope it will be adopted.
7. What is the production process of aerated block?
Aerated block equipment can be produced by different processes according to the types and quality of raw materials and the technological characteristics of main equipment.
But generally, fly ash or silica sand is ground into slurry by adding water, lime powder, proper amount of cement, gypsum and foaming agent, and then it is injected into the mold base after stirring, and after static curing, it is cut into blocks or plates of various specifications, which are sent to an autoclave by a steam curing vehicle, and then a porous lightweight aerated concrete product is formed under high-temperature saturated steam curing. The production line of aerated block equipment with an annual output of 50,000 cubic meters is mainly composed of raw material processing equipment, batching and pouring equipment and cutting and steaming equipment.
The equipment configuration is simple and convenient, and the investment is small. The equipment adopts air turnover cutting technology and distributed cutting unit. The cutting process (turning, slitting and die cutting) is completed in different jobs, and cutting and walking are controlled in the same device, which simplifies the work and is convenient for operation and maintenance.
Aerated blocks are divided into fly ash aerated concrete blocks and sand aerated concrete blocks. Among them, fly ash autoclaved aerated concrete blocks are prone to wall cracking, hollowing and falling off after being used in construction projects because of their large water absorption and large drying shrinkage.
8. What matters should be paid attention to in aerated block molding and cutting?
First, open the mold box manually or automatically.
When the aerated concrete is completely hardened in the mold box, it is transported to the cutting line. Four wall panels are turned over by hydraulic arms.
The crane lifts the aerated concrete block and places it on the product bottom forming machine. The bottom molding machine cuts the bottom surface of the aerated block as required.
The cut waste is put into the container. The crane places the aerated block on the processing position of the cross-cutting machine.
When the crosscutting frame rises, the cutting rope moves alternately in the horizontal plane to realize high-precision cross bidirectional cutting. The cross-cut aerated block enters the arrangement process through the action of push plate and baffle.
Thereby obtaining excellent product compactness. When the baffle is lifted by hydraulic pressure, start the cutting machine.
The cutting machine is driven by a motor through racks on both sides. Frame structure with vertical and horizontal cutting units and two sides.
The longitudinal cutting unit consists of two arc-shaped supporting shafts with joints, which are driven by motors to swing, and can cut aerated blocks over 50 mm The cutting rope is tensioned by hydraulic pressure and moves up and down at high frequency.
After all cutting and surface forming, the product is accurately placed on the buffer frame before steaming. When the buffer frame of the product comes out of the cutting machine, it will be sent to the flatbed car and then sent to the suction crane through it.