What fire rating did Autoclaved Aerated Concrete (AAC) achieve in ASTM E-119 tests?

Autoclaved Aerated Concrete (AAC) has demonstrated excellent fire resistance properties, achieving a 4-hour fire rating in ASTM E-119 tests. This specific rating indicates that AAC can withstand significant heat and structural stress for an extended period, providing ample time for occupants to evacuate and for firefighters to respond during a fire incident.

The fire resistance is attributed to AAC’s lightweight and porous nature, which helps to limit the transfer of heat. Its ability to maintain structural integrity for up to four hours in severe fire conditions makes it a valuable material in fire safety design and construction. This impressive performance under testing standards reinforces AAC's reputation as a reliable building material in terms of fire protection.