James Durrans Group
MarconiteMarconiteMarconite

Know-How seit 1863

James Durrans Group


Know-how since 1863

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Marconite

Marconite is a synthetic material manufactured specifically for use in earthing applications. Its distinctive properties result from a unique manufacturing process, utilising specific raw material feedstocks, carefully selected and mixed in tightly controlled ratio before undergoing a range manufacturing process and thermal treatments.

Product description

Marconite is a dark grey, granular material that replaces traditional sand and aggregate materials used within concretes mixes. Marconite is designed, developed and manufactured specifically for use in electrical earthing. This results in a number of unique benefits:

    • Low resistivity: 0.001 ohm.m is extremely low when compared to Bentonite’s 3 ohm.m
    • Versatile: suitable for most ground conditions and becomes a permanent, solid structure that it is not prone to shrinking, drying out or being washed away
    • Cost effective: it is a permanent solution; there is no need to remove and replace or ‘maintain’ it with additional water / salts every few years in order to achieve the desired earth values
    • Chemically inert: is non-corrosive to steel or copper, does not attack cement structures and has a pH within the neutral range
    • High strength: can be used as part of the building structure itself and can achieve strengths higher than Grade 25 concrete
    • Easy to use: forms a concrete like material that from first pour, achieves a low resistance earth, no need to wait or return to test.

      Mixing & use

      Marconite® is a dark grey, granular material that replaces traditional sand and aggregate materials used within concretes mixes. It should be mixed in the ratio of 3 parts of Marconite® to 1 part cement by weight with the addition of 1 litre of water per 4 Kg of total mix, i.e.: 

       

      • 3 x 25 Kg bags of Marconite
      • 1 x 25 Kg bag of Cement
      • 25 litres (25 Kg) of water

      When mixed as described above, it forms a relatively dry material with an ‘as poured’ density of around 1300 Kg / m³. The water content may be adjusted as the application requires, but this will affect the concretes final compressive strength and the drying times accordingly. Typically Marconite® concretes are touch dry within hours but can be several days before being fully cured.

      Marconite® is chemically inert with very low soluble sulphate content. It can be used with all conventional types of cement, as well as most proprietary resin-based cements, adhesives and gypsum plasters. 

      Marconite Premix

      Marconite is normally mixed with cement and water. However, it is also available in the form of a ‘premix’. This is a standard 25 kg poly sack which contains pre-weighed amounts of Marconite® and cement powder in the correct ratio to form the preferred concrete.

      With the addition of 5 litres of water, each bag can then be mixed independently and used without the need to carry additional cement powder. Utilising Marconite Premix reduces the possibility of incorrect mixing as work crews only carry one type of bag thus preventing on site confusion.

      Marconite Premix contains Portland cement powder which is hygroscopic resulting in limited shelf life. As a result this product is only available for sale within the UK and must be used within 6 weeks of purchase.