Types of Concrete Strengths & Gradings

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Types of Concrete Strengths & Gradings

Types of Concrete

We offer a selection of concrete types to suit varying applications. Our comprehensive range of concrete, allows us to help our customers with projects of any type and size, from minor domestic works to major commercial applications.

The three types of concrete we provide are On-site mixed concrete, Ready mixed concrete, and Volumetric concrete

Concrete Strengths

From flooring to foundations, patios to driveways, the concrete used in a project needs to be strong enough to cope with the loads it is expected to withstand. Concrete strength is measured by the weight in can withstand 28 days after it has been laid and cured.

Our concrete strengths range from grade C10 to C40. C10, with a strength of 8 newtons, is designed for kerb backing and bedding. C40, our strongest concrete with a strength of 40 newtons, is designed to withstand heavy duty loads.

Concrete Grading

We offer different grades of concrete to cater for different requirements and applications. Our gradings range from C8 – a wet mix concrete used for kerb backing and bedding – and C10 concrete for drainage works, to C40 concrete for structural usage and farming.

We also offer PAV 1 and 2 concrete grades, which include air-entrainment additives that help protect the surface from freeze-thaw problems.

Type: C8/Gen 0

Benefits:

Relatively weak wet/lean mix concrete, used in applications where a firm base is required but no structural strength.

Purpose/Ideal For:

  • Kerb backing
  • Bedding

8N

28 Day Strength

Type: C10/Gen 1

Benefits:

Versatile mix used throughout the industry for general purpose housing applications

Purpose/Ideal For:

  • Pad foundations
  • Oversite below suspended floors
  • Drainage works

10N

28 Day Strength

Type: C15/ Gen 2

Benefits:

Suitable for house and internal floors where a non-permanent finish is required (e.g floors to be covered by carpet/tile etc).

Purpose/Ideal For:

  • Floors with no embedded metal
  • Footings for small walls
  • Sheds, etc

15N

28 Day Strength

Type: C20/Gen 3/ST1

Benefits:

Commonly used to light duty applications.

Purpose/Ideal For:

  • Foundations (single storey)
  • Internal floor slabs
  • Oversites

20N

28 Day Strength

Type: C25/ST2

Benefits:

Extremely versatile mix, used for many domestic & commercial applications. Commonly used for foundations for houses & extensions.

Purpose/Ideal For:

  • Footings
  • Foundations & general groundwork
  • Mass concrete & trench fill

25N

28 Day Strength

Type: C30/ST3

Benefits:

Commonly used for pavements and external light use applications.

Purpose/Ideal For:

  • Driveways
  • Paths
  • Patios
  • Garage base
  • Pavements

30N

28 Day Strength

Type: C35/ST4

Benefits:

Mainly used for external slabs for heavy duty applications where the ground is subjected to heavy loading and scraping.

Purpose/Ideal For:

  • External slabs
  • Re-inforced walls and floors
  • Re-inforced bases for workshops

35N

28 Day Strength

Type: C40/ST5

Benefits:

Mainly used for structural and support beams, roadworks & agricultural use.

Purpose/Ideal For:

  • Structural & industrial applications
  • HGV parks
  • Farms

40N

28 Day Strength

Type: PAV 1

Benefits:

Contain an air-entrainment additive to create small sized bubbles in the concrete. This helps protect the surface from freeze-thaw. Mainly used for external slabs for light duty applications.

Purpose/Ideal For:

  • Driveways
  • External slabs (light duty)

30N

28 Day Strength

Type: PAV 2

Benefits:

Contain an air-entrainement additive to create small sized bubbles in the concrete. This helps protect the surface from freeze-thaw. Mainly used for external slabs for heavy duty applications where the ground is subjected to heavy loading and scraping.

Purpose/Ideal For:

  • External slabs
  • HGV yards
  • Car parks (heavy duty)

35N

28 Day Strength

Type: Screed 5:1

Benefits:

A sand & cement based mix, used for final finish on internal floors such as houses, extensions, etc. Available with or without fibres.

Purpose/Ideal For:

  • Internal Floors

Type: Screed 4:1

Benefits:

A medium strength sand & cement based mix, used for final finish on internal floors such as houses, extensions, etc. Available with or without fibres.

Purpose/Ideal For:

  • Internal Floors

Type: Pattern Imprint Concrete Mix

Benefits:

Many different patterns and colours for the finished effect available. Extremely durable and long lasting.

Purpose/Ideal For:

  • Driveways
  • Paths
  • Patios
Imix Concrete

iMix are proud to work with 3 main types of concrete:

On-site mixed concrete:

We mix this type of concrete at the site of your project – this allows us to alter the mix as we go, which means we can accommodate for changes in requirements, such as more concrete being needed or a different grade being required. The refinable nature of this concrete means the perfect amount will always be created – no more, no less.

Ready mixed concrete:

This is a batch of concrete created beforehand, at our batching plant. It’s designed according to the requirements of the customer.

Volumetric concrete:

Mixed in a volumetric mixing truck, this concrete’s popularity is down to the fact it can be mixed to the precise amount required – no shortages and no surplus of concrete.

We also offer screed, graded at 4:1 and 5:1 for internal flooring work, whether that’s a sub-layer to prepare the floor for a finish, or whether it’s the finish itself.

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