Here are a selection of different Cement Mixes and suggestions as to what they should be used for... We recommend that you ring us at the Gawallt Ready Mixed Concrete LTD offices for advice pricing and delivery options. The typical ingredients found in concrete are cement, water, sand and rocks. The ratio of the ingredients determines the strength of the concrete. The concrete could look porous if too much paste (cement and water) is used. If there is too much paste, the resulting concrete will crack easier. Therefore, the proportion becomes one of the most important features in mixing concrete.
Lean Mix
Trench Fill, Volumes where no strength is needed.
C7.5 (Formally called ST1)
A mix used for stabilising underground pipe work or use as a dry backing when installing roadside kerbing, when erecting posts or for general use where no real strength is required.
C10 (Formally called Gen1)
Both of these mixes are used as a foundation or footing mix for non-load bearing walls, garden walls up to 900mm high and footing mixes for house construction.
C15 (Formally called 1.3.6 and ST3)
Footing Mix, some houses/ bungalows and caravan bases.
C20 (Formally called ST4, Gen3 and 1.2.4)
This strength is used as a footing mix in house construction where ground is found to be soft or unstable, used mainly as the slab foundation to the floor of houses and bungalows. Bases for caravans and pathways need this strength of concrete, the latter using a 10mm aggregate for a smoother finish.
C25 (Formally called Gen1)
Dependent on special requirements this mix may be needed for slab foundation to houses or bungalows, it is also used when replacing or the making good of existing floors. Farmers use it as a general yard mix, an area for gathering of livestock and the passage of light machinery such as tractors and land rovers.
C30 / C35
Structural concrete mixes for roadways, access to farms or anywhere where large and heavy vehicles require access on a daily basis. Durable mixes to withstand heavy wear and the ever changing climate. Strong enough to withstand continuous heavy rain, frosts, snow and prolonged dry periods.
C40
This mix is widely used in the farming environment, for the manufacture of both slurry and silage pits. Strength to contain tonnes of waste product produced and a strong mix (i.e. cement content) to withstand the acids and chemicals produced by and added to silage, which can remain in these pits for long lengths of time.
C45
For Parlor flooring etc
C50
Strength Applications
Fibre
Reinforced fibres incorporated in the mix as required to suit the job. Comes in 6k Packs.
Frequently asked questions and helpful tips and suggestions for preparing your site for concrete.