Heavy weight concrete

Both fine and coarse aggregates in concrete can be replaced by a suitable MagnaDense grade to produce concrete with a density of up to 4.0 tonnes per cubic meter.

In many civil engineering situations, for example when there is a need for stabilisation, ballasting or balancing weight heavy weight concrete with a high density is the best solution. Producing and using heavyweight concrete with MagnaDense is possible using standard equipment.

Heavy concrete with MagnaDense flows in the same way as standard concrete and can be placed using standard equipment.

Workability of heavy weight concrete with MagnaDense

MagnaDense is a natural aggregate manufactured from the iron oxide Magnetite. With its high specific gravity MagnaDense is used as a coarse material to produce heavyweight concrete. As a result you will get a concrete that has more weight and your project will require less volume.

Using only MagnaDense as an aggregate means concrete densities up to 4.0 t/m3 are achievable. By mixing MagnaDense into concrete with other aggregates produces even higher concrete densities (up to 5.0 t/m3 are possible).

With the correct mix design high-density concrete can still achieve a good workability. LKAB Minerals offers a blend to be used to produce high density self-compacting concrete.

MagnaDense acts as a “heat sink” by absorbing heat from its surroundings, storing it and releasing it slowly over a period of time. With MagnaDense used as an aggregate in concrete this effect will mean that the heat of hydration produced during curing will be absorbed and the maximum temperature attained within the concrete will be lower than with normal aggregates. The risk of thermal cracking, which is often associated with thick sections, is therefore reduced by incorporating MagnaDense.

Applications using high density concrete

There are many applications that can benefit from heavy-weight concrete containing MagnaDense. We see the use of heavy weight concrete in different industries:


Civl Engineering & Construction

Heavy concrete is used in gravity base foundations, in off-shore constructions such as oil and gas platform.

Mixing the right density for heavy weight concrete

Depending on the application and your required density, you can use one of the several MagnaDense grades LKAB Minerals has available. With over 50 years of experience in heavy concrete applications, we can advise you which grades would best fit your particular concrete mix.

Samples are available upon request and our technical team are ready to help with trials when requested.

Get in touch with our Sales Managers to help you with the right selection. You can find their contact details when clicking in the expert box on the top right corner of this page.

Application expert

Bo Öhman
Sales Manager Magnetite

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