June 30, 2016
AAC classification in use for aerated concrete loads!
As the aerated concrete blocks of different manufacturers vary in density and compressive strength, presenting the permitted loads of fixings using just bulk density (kg/m3) is not the clearest method.
Sormat now states, in connection with the permitted loads of concrete blocks, the compressive strength of the blocks based on the AAC classification principle also used in ETA approvals.
The number after “AAC” identifies the compressive strength of the block in N/mm2, e.g. AAC 1.5.
Aerated concrete block manufacturers usually report the compressive strength/pressure resistance of a product in the range 1.7–7.0 N/mm2. This describes the durability of a product in terms of fixings much more clearly than bulk density, the values of which are often shown in the more complicated form 315 kg/m3, 575 kg/m3 and so on.
It is now easier than ever for users and engineers to apply the permitted loads for Sormat’s aerated concrete fixings, regardless of the concrete blocks’ make.