WIDE APPLICATIONS OF AAC PANELS

AAC Panels are reinforced, and are designed for floors and walls in multi-residential, commercial, residential (domestic) and industrial construction.

MULTI-RESIDENTIAL CONSTRUCTION

  • Non-loadbearing external wall panels, generally panels are fixed to a reinforced concrete structural frame.
  • Internal wall panels – party walls / risers / shaft walls.

COMMERCIAL CONSTRUCTION

AAC panel

  • Non-loadbearing external wall panels.

RESIDENTIAL (DOMESTIC) CONSTRUCTION

  • External cladding for loadbearing wall panels, limited to 2 storey construction;
  • Roof panels;
  • Floor panels

INDUSTRIAL CONSTRUCTION

AAC panel

  • Non-loadbearing wall panels, larger panels spanning vertically can be successfully incorporated

into industrial wall applications.

  • Mezzanine doors
  • Ceiling panels – fire exits.

AAC panel

Autoclaved Aerated Concrete Market- Regional Insight and Global Forecast to 2025

The global autoclaved aerated concrete (AAC) market size is projected to grow from USD 18.8 billion in 2020 to USD 25.2 billion by 2025, at a CAGR of 6.0%, during the forecast period. The increasing urbanization & industrialization, growth in the infrastructure sector, rising demand for lightweight construction materials, growing preferences for low-cost houses, and an ever-increasing focus on green & soundproof buildings are driving the AAC industry growth.

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Asia-Pacific was holding the largest market share of autoclaved aerated concrete market, in 2017 and is anticipated to dominate the market, throughout the forecast period. Further, Asia-Pacific’s autoclaved aerated concrete market is anticipated to grow at a significant rate and register the highest CAGR, during the forecast period. Increasing disposable incomes, increased affordability of innovative, green projects, and rising environment-related awareness are the factors contributing towards the growth of Asia-Pacific’s autoclaved aerated concrete market. Emerging economies such as China and India are consuming a high volume of AAC products, majorly attributed to the growing population and rapid rate of urbanization is leading to an increase in the number of building construction projects. Europe was the second largest market for autoclaved aerated concrete, in 2017 and is anticipated to maintain its position throughout the forecast period. The European autoclaved aerated concrete market is expected to witness moderate growth over the forecast period. The major factor driving the growth of AAC market in this region is the growing demand for light weight and green building construction.

AAC ProductionAAC Production

The AAC Building System

AAC prefab Wall Panels are a perfect solution to construct large scale commercial and industrial buildings. They also pioneer the building materials market when it comes to practical and durable construction. From giant distribution centers to new shopping malls, AAC walls protect valuable goods due to their outstanding strength and low heat absorption. Therefore, the panels are also a proven firewall solution, superior to any alternative building material.

Low-cost housing can only be achieved by the use of effective planning and projectmanagemetww cost materials,economical construction fechlction methoexactly what AAC
Building, System offers .The AAC System is complettandardized with Super Smooth blocks and panels to allow for the optimization of increaseeed,re- -duced complexity and optimized cost for a construc- tion project.


Blocks

Durable and resistant, AAC blocks provide excellent thermal and acoustic insulation, structure and fire protection in one lightweight product.

Lintels & U-Blocks

AAC lintels are special load- bearing reinforced products. They serve as beams to support the weight of the wall (live, dead and wind) over window or door openings.

Cladding Panels

AAC cladding panels are unique AAC products for farade applications. The product is extremely light and can be as thin as 35mm. They are suitable to be directly applied on exterior of any building.


Floor Panels

AAC floor/roof panels are load-bearing elements used in residential and commercial constructions.

Panels

Wall and partition panels are the main elements of aac Building System for fast and cost effective building requirements.

Application and Advantages of AAC

Autoclaved Aerated Concrete (AAC) is widely used in Australia, Japan and Europe in reinforced concrete/steel structures and constructing masonry buildings due to its advantages such as lightweight, good insulation and high quality. These advantages of the material can be combined with reinforcing elements to create an added value product of structural panel with load carrying capability. Current use of engineered reinforced AAC panels are limited to partition walls with little emphasis on using them as structural elements.

AAC panel

Panels & Blocks is one of the most popular choice for low-rise building systems worldwide. Clay bricks, AAC blocks and pumice blocks are the commonly used engineered construction material for masonry. AAC has some unique material properties such as being light weight, good insulation, airtightness and fire resistance. In Europe, approximately 60% of the new building constructions uses different types of AAC elements. Among these materials, AAC, when produced with reinforcement as panel elements, can offer a comprehensive precast construction alternative for low-rise buildings. Reinforced AAC panels, produced with a length of 60 cm up to 6 m height and desired thickness are usually used in the housing industry as partition walls.

AAC panel

On the other hand, they can be used to construct load bearing walls by placing desired number of them side by side. Additional longitudinal reinforcing bars are placed at the ends of each panel and the gaps around the reinforcement are filled with grout. Hence, AAC panel construction can increase the speed of erection compared to classical brick masonry while allowing to design the reinforcement for a target failure mode. In addition, reinforced AAC vertical panel building systems have additional advantages in seismic zones such as less building weight resulting in smaller lateral (inertial) forces, better ductility due to the presence of reinforcement.

AAC panel

Autoclaved Aerated Concrete- Environmental Benefits

Autoclaved aerated concrete, also known as autoclaved cellular concrete (ACC) and autoclaved lightweight concrete (ALC), is a precast building material which is thermally insulating, easily shaped, highly workable, fire resistant, acoustically insulating, water and mold resistant, and can be used in both  and non-structural applications. It is an ultra-light concrete masonry product offering superior workability, durability, and flexibility. AAC consists of basic materials such as sand, cement, fly ash, lime, aluminum powder paste, gypsum, and water. The chemical reaction between aluminum paste and alkaline elements in the cement provides AAC with lightness, distinct porous structure, and insulation properties which are completely different from other lightweight concrete materials.

AAC panel

AAC panel

AAC has manufacturing, embodied energy and greenhouse gas emission impacts similar to those of concrete based on weight, though it is one-quarter to one-fifth that of concrete based on volume. AAC products or building solutions have lower embodied energy per square meter than a concrete alternative. Additionally, AACs much higher insulation value reduces energy consumption required for heating and cooling. AAC possess significant environmental advantages over conventional building materials, such as insulation, longevity, and structural demands in one material. Total energy consumption for producing ACC is less than half of what it takes to produce other building material. AAC helps to reduce at least 30% of environmental waste than traditional concrete. Moreover, a decrease of 50% of greenhouse gas emissions can be achieved. Autoclaved aerated concrete is a better choice for the environment, and meeting the requirement for the construction of green buildings.

Comparison of Properties between Autoclaved Aerated Concrete Panel and Blocks (Part 3)

6.The construction speed is different

(1) Installation

Because the AAC panel is a production plan based on the secondary design of the drawings, it is the finished product that can be directly assembled and spliced on-site that arrives at the construction site, and because each piece has an area of 3.6 square meters and is very light, workers install and construct The speed is very fast; because the aerated block is a standard general-purpose material, it is necessary to prepare masonry mortar, so compared with AAC panel, the installation speed is obviously much slower;

(2) Auxiliary structure

ALC slabs do not require structural columns, ring beams, and reinforcement belts, so the construction period is shortened; aerated blocks require structural housing and ring beams to assist in installation, so the construction speed is restricted;

AAC panel

(3) Different decoration

AAC panel does not require double-sided plastering and is dry construction, so the construction speed is greatly improved; aerated blocks need double-sided plastering and wet construction, so the construction speed is greatly affected.

Comprehensive evaluation: According to the comparison of actual projects, it is known that the use of AAC panel can shorten the construction period by one third compared with the use of aerated blocks.

7.Different construction

(1) Slotting

Because there is a steel mesh in the slab, it is easy to slot both horizontally and vertically. In order to slot and open the holes, the plate can be hollowed out. The stability of the steel mesh is supported without affecting its stability; blocks with a thickness of 150 or more are simple Some, such as thin slotted walls/blocks are prone to penetration cracking, and the wall stability is poor; it is dangerous if the transverse slot is too long;

AAC panel

(2) Hanging heavy objects

Install heavy objects on the wall with a static load of 110-140KG and a dynamic load of 60-80KG; there is no problem with installing heavy objects such as air conditioners, water heaters, marbles, and tiles on the 75-120 thick slab wall; due to the poor stability of the blocks, the hanging Hanging heavy objects is very dangerous; especially the stability of 100-120 thick blocks is worse, and heavy objects cannot be hung;

8.Different quality

The use of AAC panel for internal and external wall panels, there are fewer hollows and cracks on the wall; the use of aerated blocks as the surface of the wallboard will definitely have hollows and cracks, which are well-known common problems of materials.

What are the Advantages AAC Masonry over the Conventional Brick Masonry Work? 

AAC blocks have more strength than normal clay bricks.


1. Higher Strength
AAC blocks are a very strong building material. AAC blocks have the strength of more than 4N/mm2(MPa). They are more strong, robust and safe than both bricks and concrete blocks. Due to this property, they can be used conveniently in all different kinds of wall construction.
2. Very Lightweight
AAC blocks are comparatively lightweight that other types building blocks. They weigh one-third of what clay bricks weigh. They contribute to up to 20% structural savings by decreasing the dead load of the buildings. Due to this property, they are capable of reducing the damage caused to your construction during an earthquake.


3. Easy Procurement
Procuring AAC blocks is never tough. No matter what the season is, the availability of AAC blocks is high. Unlike traditional clay bricks which are not easy to get during monsoons as they are made in traditional kilns, AAC has no such seasonal restrictions. They are produced in autoclaves in factories which are unrelated and unaffected by the seasons.
4. No Special Masonry Practices Required
Working with AAC blocks is relatively very easy. Regular masons with very basic training can work with AAC blocks perfectly. The only condition is, the tools used while installing AAC blocks are specific. Using the right tools helps in offering high quality and productivity of the blocks. AAC blocks require less plaster and mortar than clay bricks while installation.


5. Very Cost Effective
The use of AAC blocks reduces the construction cost by almost 30%. It also decreases the life-cycle cost which is not possible in the case of clay bricks or conventional CLC(Cellular Lightweight Concrete) blocks. Along with being a cost-efficient material, it also helps to decrease the load on reinforced concrete blocks by 10%-15%.
6. Easy to Cut and Shape
AAC blocks have a cellular structure and are lightweight. Due to this, they can be cut in any shape as per your wish. The blocks can be easily hammered with nails or screws and are suitable to be drilled for installing electrical and plumbing lines. Using an electronic chaser machine can give better results for cutting the blocks for any purpose.
7. No Water Seepage Issues
AAC blocks contain discontinuous air pores which do not allow water to pass through. AAC blocks do not absorb water like red bricks or clay brick, which absorb a lot of water due to their high capillary action. Since there is no seepage or moisture present in the AAC blocks, they do not allow the nesting and growing of termites, mold, and mildew.

THE BENEFITS OF BUILDING WITH AAC

Autoclaved aerated concrete is manufactured as blocks or panels. Shown here are panels being placed for residential walls.


Unlike concrete masonry units, AAC blocks are solid, with no molded core holes. Standard blocks are 8 inches high, 24 inches long, and 4 to 12 inches thick. An 8x8x24-inch block weighs only 35 pounds, so it’s easier to handle than a conventional concrete block. AAC can easily be tooled also, and even cut, drilled, and shaped with woodworking tools. Napier says that there is no other material commercially available that can match AAC for fire resistance. Four inches of AAC has a 4-hour fire rating, making it ideal in commercial buildings for encasing steel columns, surrounding elevator shafts, and for other fire-stopping requirements.

Other reasons people like living in AAC homes include:

  • They are quieter because AAC walls have good sound-insulation properties
  • AAC homes are wind- and water-resistant, and rodents or termites can’t make homes or tunnels in the walls (the soft walls can even stop bullets and shrapnel).
  • The cost and length of time to build AAC shells can be significantly less than for wood-frame construction.

Application fields of autoclaved aerated concrete products

Aerated concrete is based on siliceous materials (sand, fly ash, and silica-containing tailings, etc.) and calcareous materials (lime, cement) as the main raw materials, mixed with aerating agent (aluminum powder), and through batching, mixing and pouring , Pre-curing, cutting, autoclave, curing and other processes made of light porous silicate products.

Non-load-bearing blocks are the most widely produced and used. The bulk density is generally 500 kg/m3 and 600 kg/m3. They are mainly used in infill walls and partitions in the structure without bearing the load; the bulk density of load-bearing blocks is 700 kg /m3 and 800 kg/m3, bear the load after special structure treatment in the building; the bulk density of the thermal insulation block is generally 300 kg/m3 and 400 kg/m3, mainly used for building thermal insulation; roof panels and wall panels They are all reinforced aerated concrete slabs, and their reinforcement is different according to different uses. What are the main applications of aerated concrete products?

1、High-rise frame building

Years of practice proved. The application of aerated concrete in high-rise frame buildings is economical and reasonable, especially the use of blocks to build internal and external walls, which has generally been recognized by the society.

2、Buildings in earthquake-resistant areas

Due to the light weight of the aerated concrete, the seismic force of the building is small, which is advantageous for earthquake resistance. Compared with the brick-concrete building, the same building, under the same earthquake conditions, the degree of earthquake damage is different by the earthquake design fortification level, such as the brick-concrete building When the fortification reaches 7 degrees, it will be destroyed, while the aerated concrete building will not be destroyed when the fortification reaches 6 degrees. During the Haicheng earthquake in 1975, more than 30 porous concrete buildings exhibited minor damage, while the adjacent brick-concrete buildings suffered severe damage. When the Tangshan earthquake in 1976, a five-story aerated concrete load-bearing building in Baijiazhuang, Beijing, The self-weight was only 700kg/m2. At that time, when the earthquake intensity was 6 degrees, no new cracks appeared after the earthquake. However, the lower part of the four-story mixed structure residence at 50m had large oblique cracks.

3、Buildings in severe cold areas

Aerated concrete has good thermal insulation performance. The thermal insulation effect of a 200mm thick wall is equivalent to that of a 490mm thick brick wall, because it has outstanding architectural economic effects in cold regions and is competitive.

4、Soft foundation construction

Under the same foundation conditions, the number of layers of aerated concrete buildings can be increased, which is economically advantageous. The main disadvantages of aerated concrete are large shrinkage, low modulus of elasticity, and fear of freezing damage. Therefore, aerated concrete is not suitable for the following occasions, the temperature is greater than 80 ℃, the environment with acid and alkali hazards; the long-term humid environment, especially in the cold Particular attention should be paid to the region.

Autoclaved Aerated Concrete-Environmental Benefits

AAC has manufacturing, embodied energy and greenhouse gas emission impacts similar to those of concrete based on weight, though it is one-quarter to one-fifth that of concrete based on volume. AAC products or building solutions have lower embodied energy per square meter than a concrete alternative. Additionally, AACs much higher insulation value reduces energy consumption required for heating and cooling. AAC possess significant environmental advantages over conventional building materials, such as insulation, longevity, and structural demands in one material. Total energy consumption for producing ACC is less than half of what it takes to produce other building material. AAC helps to reduce at least 30% of environmental waste than traditional concrete. Moreover, a decrease of 50% of greenhouse gas emissions can be achieved. Autoclaved aerated concrete is a better choice for the environment, and meeting the requirement for the construction of green buildings.