Soil Conditioning Agent


Marconite is a granulated conductive medium designed to replace the conventional aggregate in concrete and thereby provide a medium with good electrical conductivity and high strength.

It can provide a permanent solution to problems in electrical/constructional situations.

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 5 Kg of total mix, ie

3 x 25kg bags of Marconite
1 x 25kg bag of Cement
20 x litres (25kg) of water

When mixed as described above, it forms a relatively dry material with an ‘as poured’ density of around 1300kg/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: Granulated Conductive Medium

Marconite® is the world’s premium electrically conductive aggregate material. Used as a backfill to enhance the effects of earth electrodes, Marconite® enables electrical engineers to achieve permanent, stable and low resistance earthing solutions, even in difficult ground conditions.

Specifically developed and manufactured for the needs of the earthing industry, for over 40 years Marconite® has allowed electrical engineers to tackle the toughest conditions and achieve the satisfactory earthing of installations throughout the world.


Marconite® conducts electricity much in the same way as metals, through the movement of electrons.Traditional earthing materials such as Bentonite conduct electricity through the movement of charged ions. These ions require the presence of an effective electrolyte, such as water and the presence of salts. Unlike Marconite®, ionic based systems are subject to drying out and without water they do not conduct electricity. Marconite® does not need water to conduct electricity and so does not suffer any effects from drying out.


Marconite® has a long and proven track record and has been used within critical earthing solutions to a variety of industries, including:

  • Lightning conductor earthing
  • Power generation and distribution
  • Oil and gas production and distribution facilities
  • Rail, underground and transport networks
  • Telecommunications, High Speed Broadband and Media
  • Utilities and Water treatment
  • Defence facilities and equipment
  • Anti-static environments


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.

Marconite® is a synthetic material manufactured specifically for use in earthing applications and, unlike Bentonite, it is not a naturally occurring mineral or ore.

Its distinctive properties result from a unique manufacturing process, utilising specific raw material feedstocks, carefully selected and mixed in tightly controlled ratio’s before undergoing a range manufacturing process and thermal treatments.The resulting product is a precisely measured, granular material, dark grey in colour, that is virtually dust free and with exceptional electrical properties. This is then packaged in high strength, UV resistant valve topped sacks and palletised.

Marconite® is the best at what it does because it is manufactured to be that way.


Bentonite is used as a backfill to reduce soil resistivity. When mixed with water, it swells to several times its dry volume. The moisture content can be retained for a considerable time. Further moisture can be absorbed during rainfall etc. It can be supplied in either powder or granular form.

Dependent on soil conditions, 18 No. 25kg bags creates a volume of 1m³.

Earthing Compound

Granular: Granular is the preferred option for filling trenches where the conductor is covered with Bentonite and then water poured over and mixed in the trench.

Powder: Powder is the preferred method for pouring into bore holes to en-sure the mixture is of a thin enough consistency to reach the bottom of the bore hole. If diamond drilling is required for deep holes, possible 40m depths and deeper and the Bentonite is to be pumped through the core in to the hole, then powder would be the preferred option.

Material: Sodium carbonate activated calcium Montmorillonite clay. The product is a naturally occurring substance with no known ecological hazards and can be disposed of as non hazardous waste.

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