Autoclaved Aerated Concrete (AAC) Market – Snapshot
Autoclaved aerated concrete (AAC), also known as autoclaved cellular concrete (ACC) or autoclaved lightweight concrete (ALC), is an eco-friendly green building material. The raw material used for the production of AAC is fly ash, which is a leftover product of thermal power plants. AAC has various advantages over other building materials. The product offers a unique combination of low weight, rigidity of construction, durability, and cost-effectiveness. AAC facilitates speedy construction. The product offers thermal and acoustic insulation, providing better safety and lower energy cost of heating or cooling. Although AAC has been in existence since 1923, it is only now that the product has started gaining popularity as a sustainable green building material. The product has been extensively used in Europe and Asia.
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Accelerated urbanization, particularly in developing regions such as Asia Pacific, Latin America, and Africa, is creating the need for new building construction. AAC has been the preferred choice of building material for developers and contractors as it is a lightweight and energy efficient material. For instance, the percentage of urban population in Asia Pacific is likely to increase from 37% in 2000 to 62% by 2020, and this is likely to create need for new construction, thereby propelling the demand for AAC. The primary energy needed to produce a cubic foot of AAC (raw materials, manufacturing, and transport) is relatively low compared to that for alternative masonry building materials.
Energy consumed for the production of AAC is less as compared to that for other building materials. AAC consumes approximately 50% and 20% less energy as compared to concrete and CMUs, respectively. Tiny air pockets and thermal mass of AAC offer thermal insulation that reduces construction costs related to heating and air-conditioning. AAC reduces heating and cooling requirements by up to 30% due to its thermal insulation properties, resulting in continued financial benefits during the life of the construction. Hence, AAC is the most energy- and resource-efficient building material. This is expected to drive the AAC market during the forecast period.
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Cost Associated with AAC and Lack of Awareness about AAC
The selling price of AAC blocks is higher than that of traditional clay bricks. Clay bricks account for a significant market share in building materials and are widely used as a construction material as they are cheaper as compared to AAC blocks. Higher cost of AAC as compared to clay bricks can act as a restraint for the AAC market. AAC is superior compared to other building materials based on various parameters. However, several contractors are not even aware of it, and they continue using other building materials. More precision is required in the application of AAC. For instance, trained masons need to be adjusted to thin mortars as opposed to traditional cement-based mortars. Additionally, the number of AAC production facilities is limited, particularly in North America. This construction material is available in limited areas only.