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Your guide to concrete strength 

Southwest Concrete Pumping

Your guide to concrete strength 

There’s no such thing as just one type of concrete. Depending on the type of project you’re embarking on, you’ll need to make sure that you get the right concrete for the job. 

One of the big ways that concrete is categorised is by its strength. So, to help you pinpoint the right concrete strength to suit your needs, this article will guide you through the grades of concrete strength available. 

How long does concrete take to strengthen? 

While concrete sets pretty quickly, it does not reach its full strength until around 28 days after it is first laid. During this time, it will increasingly harden to reach its full compressive strength. Care should be taken to avoid driving heavy vehicles over concrete until it has reached full strength. 

What are the types of concrete strength? 

When using this guide, the letter C that is placed before each number refers to the compressive strength of the concrete in newtons. Therefore, if a concrete type has a strength value of C30, then it has a compressive strength of 30 newtons. The higher the number, the stronger the concrete will be. 

C10

The lowest strength of concrete, this mix still finds use in simple domestic or commercial applications, for example in patios. Because it’s the weakest concrete type, it should never be used in structural works. It can be used for walls, but not any load-bearing walls. 

C15

Once again, this relatively weaker concrete type is best suited for patios, paths and slabs, but also kerbsides. 

C20 

Suitable for lightweight domestic and commercial projects, this grade is useful for structural bases where the structure being built will be lighter than the concrete. This makes it ideal for shed bases, garage bases, some home extensions, as well as patios and other surfacing. 

C25 

A very versatile grade of concrete, C25 can be used for footings, foundations, floors, kerbs, and even some types of roadworks. This makes it a useful material for domestic, commercial and even agricultural settings. 

C30

A sturdy option that resists weathering well, C30 can be used for roads and paths, thanks to its ability to withstand the weight of heavy vehicles, making it ideal for both commercial and agricultural applications. It is also commonly used in foundations, bases and paving. 

C35 

A strong, sturdy option that is found in high-traffic zones, in areas that require reinforcement, and in structural construction and agricultural applications. This can include heavy-duty foundations, walls, paving, garages, piling, industrial driveways, and bases. 

C40 

The highest strength of concrete available, this mix is used for structural and load-bearing applications, usually in construction, industrial or commercial projects. Its primary uses are in beams, roads, pilings, foundations, and other support structures. This type of concrete grade also has the ability to withstand harsh chemical weathering, making it ideal for use in agricultural settings or around septic tanks. 

If you’re searching for high-quality concrete of any grade, look no further than Southwest Concrete Pumping. We are reliable concrete suppliers for the South West and south coast, using a dedicated fleet of specialist vehicles to ensure you get the right concrete on time. We can also provide concrete pump hire to make site access easy. To find out more, simply get in touch with our team today.

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