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C20 Concrete Mix

C20 concrete mix is a versatile material, adaptable to a wide range of construction projects. It’s the perfect choice for building strong foundations for a variety of domestic structures. Ready Mix Concrete London, with a proven legacy of over 15 years of delivering excellence, is here to fortify your construction projects. We are fully equipped to deliver C20 concrete mix as per design, required parameters, and timeframe, ensuring a reliable and secure service.

Our main goal is to ensure the timely delivery of your concrete mix to avoid any disruptions to your workflow. We provide top-notch services to meet your project’s schedule and requirements. To achieve maximum efficiency and strength, our experts create customised mix designs using the highest-quality materials to achieve necessary parameters.

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Our Services

Catering to every concrete requirement of your construction projects, we cover a range of concrete solutions:

Concrete Supply

Constructing a Formwork

Our agile and on-schedule concrete delivery services ensure a smooth workflow and timely completion of your project.

Concrete Pump Hire

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From small domestic projects to commercial skyscrapers, our efficient and versatile concrete pumps can handle them all.

Waterproof Concrete

waterproof concrete

Designed to withstand extraordinary damping and humidity, we are offering waterproof concrete for versatile applications.

Onsite Mix Concrete

onsite mix

Based on your concrete requirement, our on-site mix concrete services are designed for long-distance deliveries.

Technicalities of C20 Concrete Mix Ratio

The C20 concrete (Gen 3) is a standard-strength concrete grade its minimum compressive strength after 28 days of curing. The compressive strength of the C20 concrete mix is 20MPa (N/mm2) in 28 days. The ratio is as follows:

  • 1 Part Cement
  • 2 Parts Sand (Fine Aggregate)
  • 4 Parts Gravel (Coarse Aggregate)

When we use premixed ballast, the concrete mix ratio of 6 parts is used for 1 part of the cement. The ideal water-to-cement ratio is 55% if all other materials are completely dry. However, in reality, the materials are often damp, especially the sand. In such cases, you may need to adjust the amount of water added.

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Applications of C20 Concrete Mix

Owing to its lightweight composition, the C20 / Gen 3 concrete mix contains a high cement content, making it suitable for a variety of applications, such as:

  • Extensions
  • Strip foundations
  • Slabbed foundations
  • Garage floors
  • paths and patios
  • Shed and garage bases
  • Wall foundations
  • Other Commercial or domestic use

Ready Mix Concrete London – Elevating Your Projects

Looking for a concrete supplier in London? Contact our experts to discuss your requirements and witness unmatched concrete delivery services.

Our Customisable Working Procedure

To ensure a hassle-free concrete delivery, we follow a 3-step procedure:

Contact Our Specialists: Contact our specialists by filling out our form or calling us, and we will be available to help.

Discuss Your Project: Our team will discuss your project requirements in detail and give you an estimated cost quote.

Get a Scheduled Delivery: Your personalised C20 concrete mix will be delivered promptly, exactly when you need it.

Reach Out to Us

If you are unsure whether C20/Gen 3 is suitable for your project’s requirements, please feel free to contact us. We provide the most reliable materials and services for both domestic and commercial construction projects.

Contact us via phone (020 7458 4747) or email ( regarding any query.

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Frequently Asked Questions

The C20/Gen 3 concrete mix requires 28 days for full curing. After one week, the concrete will have approximately 70% strength. It takes 24 to 48 hours for concrete to set.

Concrete mix design considers several important factors, including strength, durability, workability, the desired appearance of the concrete, and the specific raw materials.

The C20 concrete mix has a strength of 20 Newton per square millimetre in 28 days, making it suitable for lightweight structures like workshop bases, garages, domestic flooring, and foundations. The C25 concrete mix is stronger and is used for heavier structures or larger buildings.

To calculate the amount of concrete you need, it’s recommended to use the standard C20 concrete mix ratio, 1:2:4 (one part cement, two parts fine aggregate, and four parts coarse aggregate). This ratio provides the fundamental mixture for C20 concrete.