What You Need To Know About Magnesite Floors

If you have a home built around the 1920s to the 1980s, there is a chance that the floors of your home are made from Magnesite. Magnesite is a form of cement, created through magnesium oxychloride. What makes it different from normal cement is that fillers and aggregates such as wood chips or sawdust have been added into it.

There are many benefits of having Magnesite Flooring. The added fillers actually make Magnesite much more durable than cement. It is also extremely durable, resistant to oils and grease, lightweight, and event noncombustible. The material also helps keep houses cool during the hot summer months.

During the 70s and 80s when carpet became more popular, many homes that originally had magnesite simply had carpet put on top of the floor. This may result in chipping and/or pitting, which is caused by the hammering of nails on top of the Magnesite in order to install linoleum, vinyl flooring or carpet.

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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