A construction material combining cement and air bubbles, aerated concrete has the potential to cut building costs by up to a factor of 10. It is also fireproof, water-resistant and insect-proof, and helps to insulate buildings. It can be moulded into various shapes, carved and painted and is said to be easy to work with. It can be poured into a mold to make bricks and blocks, but it can also be used to build walls, floors, foundations and roofs.
Aircrete has become a popular alternative to traditional building materials like stone and concrete due to its lighter weight and the fact that it is quicker to construct with. However, in order to utilize this material, it is vital to have a stable mix. Online resources for making aircrete are not robust and do not seem to consistently produce aircrete that maintains its target volume.
To resolve this issue, a number of experiments have been undertaken to find a successful mixture. The following article will discuss the results of these trials and the lessons learned from them.
For this trial, the foam was directly injected into the cement slurry from the foam wand, rather than measured into a bucket and added to the slurry, as had been done in previous trials. This allowed for much faster and more thorough mixing of the slurry and foam, as the bubbles were not spending time in a separate bucket where they could lose their integrity before being injected into the slurry. Unfortunately, this trial still failed and the aircrete collapsed during curing.