Anti-ballistic panels made from magnesia based cement and system comprising same

An anti-ballistic building panel made substantially from:

• one of, or a combination of:
• magnesium oxychloride hydrate cement, magnesium oxysulphate hydrate cement and magnesium phosphate cement;
• wherein said cement also incorporates one or more of:
• high elastic modulus fibres and/or stone chips, preferably granite chips;
• and low elastic modulus fibres;
• said fibres and/or chips being distributed through said cement;
• said panel having an increased ability to resist damage when subjected to ballistic impact, said anti-ballistic properties being the ability to ameliorate any one of the following failure modes:
• shattering, spalling, bulging or fragmentation according to AS/NZS 2343 or equivalent standard.

The use of granite chips in the manufacture of an anti-ballistic building panel made substantially from magnesium oxychloride hydrate cement;

• magnesium oxysulphate hydrate cement;
• a hybrid of both said materials;
• and/or magnesium phosphate cement, to fully or partially replace high modulus steel fibres to improve resistance to corrosion without substantially reducing anti-ballistic performance;
• wherein said panels have an increased ability to resist damage when subjected to ballistic impact, said anti-ballistic properties being the ability to ameliorate any one of the following failure modes:
• shattering, spalling, bulging or fragmentation according to AS/NZS 2343 or equivalent standard.

The use of one or more of high elastic modulus fibres and/or stone chips, preferably granite chips;

• and low elastic modulus fibres in the manufacture of an anti-ballistic building panel made substantially from magnesium oxychloride hydrate cement;
• magnesium oxysulphate hydrate cement;
• a hybrid of both said materials;
• and/or magnesium phosphate cement, to eliminate or reduce the occurrence of multicracks and/or spider-net-like failure mode under projectile impact;
• wherein said panels have an increased ability to resist damage when subjected to ballistic impact according to AS/NZS 2343 or equivalent standard.

The use of magnesium oxychloride hydrate cement, magnesium oxysulphate hydrate cement, magnesium phosphate cement;

• or a hybrid of one or more of said materials;
• as a substrate in the manufacture of an anti-ballistic building panel;
• wherein said panels have an increased ability to ameliorate any one of the following ballistic failure modes:
• shattering, spalling, bulging or fragmentation, according to AS/NZS 2343 or equivalent standard.