Concrete
Grange Quality Assured Concrete Kitemark Licence KM 562490
Here you can find information on many of the concrete mixes Grange supply and their common applications. We hold third party accreditation via the BSI Kitemark Scheme which gives us permission to supply any mix that complies with BS8500:2 and EN206.
These standards cover Design Concrete, Designated Concrete, Standardised Prescribed Concrete and Proprietary Concrete. Using the table below you can match your application to a suitable mix.
Please note that these are typical applications so if you are in any doubt please contact us and our expert team will be very happy to assist.
Typical Concrete Mixes by Application
Applications
Designated concrete
Designed concrete
Recommended consistence class
Unreinforced foundations and associated works requiring DC-1 concrete (normal soil conditions)
Blinding and mass concrete fill
GEN1
C8/10
S3
Strip footings
GEN1
C8/10
S3
Mass concrete foundations
GEN3
C16/20
S3
Trench fill foundations
GEN1
C8/10
S4
Drainage works to give immediate support
GEN3
C16/20
S3
Subfloors
GEN0
C6/8
S2
General applications
Kerb bedding and backing
GEN0
C6/8
S1
House floors with no embedded metal
Permanent finish to be added e.g. screed or floating floor
GEN1
C8/10
S2
No permanent finish to be added e.g. carpeted
GEN2
C12/15
S2
House and garage ground floor slabs
Fully nominally reinforced, either ground bearing, suspended or over sub-floor voids
RC28/35
C28/35
S2
Garage floors not designed as suspended and not reinforced
GEN3
C16/20
S2
Wearing surface: light foot and trolley traffic
RC25/30
C25/30
S2
Wearing surface: general industrial
RC32/40
C32/40
S2
Wearing surface: heavy industrial
RC40/50
C40/50
S2
Paving and roadbase
House drives and domestic parking
PAV1
C28/35 AE
S2
Heavy-duty external paving with rubber tyre vehicles
RC40/50XF
N/A
S3
Heavy-duty external paving with rubber tyre vehicles (alternative)
PAV2
C32/40 AE
S3
Agricultural
Livestock Floors
RC28/35
C28/35
S3
Crop Store Floors
RC28/35
C28/35
S3
Workshop Floors
RC32/40
C32/40
S3
Stable Floors
RC35/45
C35/45
S3
Silage Pits
RC32/40
C32/40
S3
Slurry Pits
RC30/37
C30/37
S3
Dairy Parlours
RC35/45
C35/45
S4
External Yards and Roads
RC40/50 XF
N/A
S3
External Yards and Roads (alternative)
PAV 2
C32/40 AE
S3
Special Applications
Grange Proprietary Mix
Fibre reinforced concrete
Macrofibre Concrete or Steel Fibre Concrete
Crack control and increased durability
Microfibre Concrete
Pouring concrete into running water
Antiwashout Concrete
Watertight concrete
Watertight Concrete
Rapid early-strength concrete
Microsilica Concrete
No fines concrete for drainage
8:1 No Fines or 10:1 No Fines
This table is intended as guidance only - Always follow plans as set out by specifiers - consult with a suitably qualified engineer if unsure.
Fibre Concrete
Various types of fibre may be added to the concrete to improve its properties. The main fibres used are steel, polypropylene and macro synthetic
Steel fibre concrete is used extensively for industrial ground-supported floors. The fibres provide some degree of control over the formation of early thermal and shrinkage cracks. They give the hardened concrete some post-cracking residual strength.
Various types of short polypropylene fibre may be added to concrete. The fibres are used to reduce the risk of crack formation in young concrete (plastic cracking). They do not significantly affect the properties of the hardened concrete and can be used to provide freeze thaw and impact resistance
Larger diameter synthetic fibres known as macro synthetic fibres can give similar post-cracking strength to steel fibres. They are used in similar applications, particularly when there are concerns about durability.
A recent innovation has been the use of steel or macro synthetic fibres to replace the nominal reinforcement in composite slabs on metal decking (Structural elements/Suspended floors/Steel concrete composite suspended floors).
Grange has extensive experience of the use of all fibre types in concrete, if you have any queries on the use of fibres please feel free to ask us and we will be able to help.
