In building with AAC, most blocks are solid and uniform, but some are typically ordered with round cores approximately 3.5 inches in diameter. By aligning these cores at the corners of a building and at window and door openings, continuous vertical channels are created into which steel re-bar is placed and concrete grout is poured. At the top of a wall, specialized U-shaped blocks are used that create a continuous channel or trough into which re-bar is placed and concrete is poured—creating a structural bond beam.
Building with AAC blocks is quite different from building with standard hollow-core concrete blocks. Starting with a level footing, a thin-set mortar is laid down using a specialized toothed trowel that holds a scoop of mortar. The end of the adjoining block is also buttered with the mortar. The block is then set down and tapped into place with a rubber mallet. It is so different from concrete block installation. It’s much easier to work with AAC 。In addition to standard-dimension blocks, AAC is available in a wide range of precast panels that are produced with steel reinforcement to meet specific needs.