CONCRETE
General for autoclaved aerated concrete units
The specifications of the materials to be used shall be included in the production control documentation. If appropriate European Standards are available, they shall be used except that aggregates need not comply with grading requirements. If not available, the manufacturer shall specify the materials and have data on their suitability.
See BS EN 771-4 for autoclaved aerated concrete units
General manufactured stone units
AAC masonry units shall be manufactured using hydraulic binders such as cement and/or lime
combined with fine siliceous based material, cell-generating material and water and cured with high
pressure steam in autoclaves.
See BS EN 771-5 for manufactured stone units
General Concrete flue blocks
The specifications of the materials to be used shall be included in the production control
documentation. If appropriate European Standards are available, they shall be used except that
aggregate need not comply with the grading requirements. If not available, the manufacturer shall
specify the materials and have data on their suitability.
For Concrete flue blocks see BS EN 1858.