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AAC
Autoclaved Aerated Concrete
Construction material’s best invention is 1920’s Swedish developed Autoclaved Aerated Concrete (AAC). Architect, and inventor, Dr. Johan Axel Eriksson, added aluminum powder to concrete, learning that this reaction created hydrogen bubbles within concrete mixtures. It was like adding yeast to bread dough. Dr. Eriksson witnessed his creation form a stronger, lighter, better, concrete. A century later, AAC continues to provide its versatility, benefits, and strength, to buildings all around the globe.
AAC is produced by combining fine aggregates, cement, water, aluminum powder, and fly ash. Once these components are mixed, they are casted, and autoclaved. During the high temperature curing process, tiny hydrogen bubbles are produced. These bubbles cause the cement to rise before hardening. In rising, the hydrogen escapes, and air fills the micro pockets. This process endows AAC with a wide range of properties which make it ideal for construction.
Attributes and Benefits of Autoclaved Aerated Concrete:
▫️Fire Resistant
AAC is noncombustible material, and is able to endure 6 hours of active flames without a structure being compromised. Other finishes that adhere to AAC can resist fire as well, creating a mainframe that offers fire protection.
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▫️Fungi Resistant
Building with this material reduces micro spaces which can encourage the seeping in of moisture. Simultaneously, this vapor permeable material, allows interior excess water to diffuse to the exterior. As a result, AAC homes prevent condensation, and are highly resistant to mold, mildew, and rot.
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▫️Pest Resistant
AAC does not attract rodents and pests, and cannot be damaged by them. AAC’s makeup makes it incredibly difficult for colonizing, nesting, and burrowing. This is an easy way to increase the health of your yard and home, while saving on costs in relation to rodent and pest management.
▫️Sound Absorbing
Providing an average 30 decibels in sound dampening, both exterior, and interior, noise is reduced.
▫️Thermally Efficient
The makeup of AAC provides excellent insulation, up to R-1.5 per inch. For this reason, AAC homes are suitable even in the most extreme temperature, and weather, conditions. Monetary savings are found in the energy efficiency of these homes, as heating, and cooling, costs are decreased.
▫️Durable
During the autoclaving process, heat and pressure are extremely high, causing a reaction that results in great strength. Simultaneously, the product is still lighter weight. This means homes are stronger, and built faster, while saving on transportation, and labor, costs. AAC is not just strong, but resilient, withstanding destructive weather events, and harsh climates. AAC’s strength and lighter weight have proven AAC can even endure lateral movements, significantly reducing risk of damage during earthquakes.
▫️Ecofriendly
AAC uses recycled materials, like fly ash, and is recyclable itself. This products supply efficiency reduces its environmental impact from first processing through final disposal. AAC produces, on average, %50 less of the green-house emissions emitted from traditional masonry production. This building material is non-toxic, using no toxic substances. The curing process, and workability, of AAC decreases overall material usage per project, and reduces its solid waste by approximately %30. AAC replaces traditional lumber based building methods, allowing for fewer trees to be cut down. Lumber related waste is absent as AAC is casted to exact dimensions.
▫️Improved Construction Methods
AAC is a workable, and versatile, product. It is pre-cast as blocks, panels, or cladding, and can be made to fit other sizes and forms. AAC increases accuracy, and minimizes waste, as casts are made to exact sizes, and there is less need for both on-site cutting, and other materials like lumber, and mortar. Due to its lighter weight nature, these casts are manipulatable, allowing for faster installation. AAC does not demand special equipment, positively affecting build time, and cost. Regular tools can be used for sanding, cutting, and routing for plumbing, and electrical, lines.
