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Autoclaved Aerated Concrete - Green Building Material


Autoclaved Aerated Concrete - Green Building Material - Part 1 Autoclaved Aerated Concrete - Green Building Material - Part 2 Autoclaved Aerated Concrete - Green Building Material - Part 3 Autoclaved Aerated Concrete - Green Building Material - Part 4 Autoclaved Aerated Concrete - Green Building Material - Part 5

The superior solution in the world of building materials and construction systems today . Thousands of architects, engineers, builders, owners, developers and other professionals, around the world validate the better properties of AAC in their own work and own valuable property and investment because of its proven advantages for more than 80 years. AAC is a unique building concept, which offers innumerable building advantages. The technology of producing building blocks from the natural raw materials quartz sand and lime has been around since the end, of last century. Around 1900, the process was improved by adding steam curing. This was the starting point for a completely new material. Autoclaved Aerated Concrete (AAC) embodies so many positive properties, that they could only be equaled by using a combination of different materials. AAC ranks as an incombustible building material.

AUTOCLAVED AERATED CONCRETE (AAC)

AUTOCLAVED AERATED CONCRETE (AAC)Although AAC was already being produced at the turn of the century, improvements in the manufacturing process have led to the superior AAC as we know it today. AAC material provides a comfortable environment which satisfies other demands required for today’s building materials:–It is made from abundantly available natural resources.–The manufacturing process is efficient and nonpolluting. Its properties will continue to satisfy specifications and building codes. Working with AAC is easy and efficient. AAC is both versatile and economical. AAC meets the diverse demands better than any other material due to the numerous advantages of its physical and mechanical properties. This has given rise to a complete construction system with complementary products. I offer products and construction service for building an entire structure from basement to roof with Autoclaved Aerated Concrete.

MANUFACTURING PROCESS

MANUFACTURING PROCESSAutoclaved Aerated Concrete (AAC) is made from silica sand, lime, cement and water, to which an expanding agent is added. The AAC manufacturing process starts when the sand is ground to the required fineness in a ball mill. Raw materials are then automatically weighed and measured in the mixer along with water and an aluminum paste (the expanding agent). After mixing, the slurry is poured into metal molds in which the expanding agent reacts with the other elements. The mixing results in a chemical reaction that expands the mixture to form small, finely‐dispersed air spaces. The molds are sent to a pre‐curing room for several hours. Then the semi ‐solid material is transported to the cutting machine. The cutting machine cuts the molds, using steel wires, into the size required for the building elements. The products homogeneity combined with our high precision cutting technology, results in pieces with dimensional tolerances of 1/16”.The final phase in the production process is steam pressure curing in autoclaves for up to 12 hours. Block, panels and other AAC elements are removed from the autoclave, packaged and sent to the finished product storage. AAC reinforced elements, such as floor panels, wall panels, and lintels contain steel reinforcement mesh that is treated for corrosion with a water based acrylic, then placed in the mold before the slurry is added. The manufacturing process is then the same as described above for un reinforced elements.

Why is AAC considered a green and environmental building material?

  • because the main ingredients are quartz sand,cement,lime and water, all abundantly available.
  • because the material increases to five times its initial volume during production -because the primary energy needed to produce one cubic of material is only 340 KWH -because any production waste before its final setting will be reintroduced into the production cycle.
  • because there is no pollution of either water or air as the only emissions result from generating the energy in the production process.
  • because AAC left over from the building site can be recycled. Crushed and used for litter sand or foundation back fill or insulator.
  • because AAC neither contains nor emits toxic substances.

Email: info@mhe-international.com

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