Does Magnesite Contain Asbestos In Australia

Does Magnesite Contain Asbestos In Australia

Magnesite is a magnesium carbonate mineral with a chemical composition of (MgCO3). Magnesite is an important industrial mineral, pure Magnesite is theoretically 47.8% magnesia (MgO) and 52.2% carbon dioxide (CO2).  It is the source of two-thirds of the world’s magnesia (MgO); 25% is extracted from sea water, with the balance coming largely from brines.

World production of Magnesite is estimated to be 5.96 Mt with China being the major producer. Australia produced about 90,000 tonnes in 2013 with South Australia contributing 3,632 tonnes.

It is named after the presence of magnesium in its composition. Magnesite usually forms during the alteration of magnesium-rich rocks or carbonate rocks by metamorphism or chemical weathering. Magnesite is a specialised cementitious product that is based on Magnesium Oxychloride (or Magnesium Oxysulphate) cements.

The most common form involves the reaction between a Magnesium Chloride solution and Magnesium Hydroxide powder to form the cement binder. The finished product also contains a filling material which is commonly sawdust, wood fibres, cork or can also contain ASBESTOS.

Magnesite Flooring Removal is moisture sensitive and will gradually breakdown if it remains wet for an extended period. Magnesite will swell up and the filler can also rot and produce unpleasant odours. The product is mixed and then poured onto the surface to be topped. Magnesite Flooring is normally at least 10mm – 25mm thick. But can get up to 50mm thick if two coats have been poured. Magnesite was applied to the top of concrete ground floors in unit blocks.

Magnesite, which was commonly used as a floor topping or levelling product, Magnesite contains a very strong glue. When Magnesite absorbs water, the glue can leach into concrete floors and corrode steel reinforcement bars. There are thousands of buildings built in between the 1920s and 1980s with Magnesite Floor toppings that are now facing large Concrete Cancer repair bills due to home owners and strata’s not removing Magnesite from properties early enough and repairing the damage early on.

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