Whether you are a homeowner working on a shed base in the garden, or a builder working on large scale construction projects, concrete is a fundamental material. But there are a couple of ways to get concrete to your site. This is where the discussion of ready-mix vs mix-on-site concrete (also known as volumetric concrete) comes into play.
Ready-mix concrete is produced at a batching plant ready for collection or delivery. Meanwhile, mix-on-site concrete is produced in a mini mobile batching plant vehicle on your site.
Both can be used for different projects of varying sizes. However, it is likely that one service will be better suited to your project than the other. This will depend on a range of factors such as project size, concrete volume needed, timing, budget and access to the site.
In this article, we’re going to explore ready-mixed concrete vs site mix concrete and what you need to consider when choosing.
What Is Ready-Mix Concrete?
As briefly mentioned above, ready-mix concrete is produced at a batching plant. Here, they have large quantities of cement, aggregate and water that is poured directly into the large tube-like mixer.
An operator has control of the plant and is able to produce different design mixes to exact specifications. This also enables quality control and consistency across batches.
Batching plants can also produce a wide range of concrete design mixes for different structural and non-structural applications.
The concrete is then poured out of a large spout directly into a vehicle. This will either be a drum mixer that will deliver the concrete to the project site, or a truck that can collect and transport liquid concrete.
Another way to think about ready mix concrete is that it is pre-prepared before arriving at your site. Typically, this can be a faster way to get concrete on-site for a project.
What Is Site Mixed Concrete?
Meanwhile, mix-on-site concrete is the opposite. A specialist truck, called a volumetric truck, carries all the ingredients needed to the site, and produces the material there and then, on your project site.
Site-mixed concrete, as you can imagine, is typically used for mixing exact quantities on demand, great for small to medium projects or where requirements might change.
As with any on-site mixing process, consistency depends heavily on accurate measuring and operator experience.
Ready-Mixed Concrete Vs Site Mix Concrete: Key Differences
The table below highlights the main differences between ready-mix concrete and site mixed concrete.
| Factor | Ready-Mix Concrete | Site Mixed Concrete |
|---|---|---|
| Quality Control | Produced in a controlled batching plant using precise measurements for consistent strength and performance. | Mixed on-site in a volumetric, meaning quality can vary depending on measurements and mixing accuracy. |
| Speed & Efficiency | Delivered ready to pour, making it much faster and more efficient for medium and large projects. | Slower process due to mixing on-site, especially when larger volumes of concrete are required. |
| Cost | Can reduce overall labour and project time costs, particularly for larger jobs and commercial work. | May appear cheaper for very small jobs or DIY tasks, but labour and wasted materials can increase costs. |
| Waste | Concrete is batched to the required quantity, helping reduce waste and keep sites cleaner. | Excess materials and inaccurate mixing can lead to more waste and additional clean-up. |
| Labour Requirements | Requires less manual labour on-site, allowing contractors to focus on installation and finishing. | More labour intensive, as materials must be measured, mixed, and managed on-site. |
| Reliability | Offers consistent results across every load, making it ideal for projects requiring dependable strength and finish quality. | Results can vary between batches, especially if mixing ratios are inconsistent. |
| Best For | Professional construction projects, driveways, foundations, slabs, patios, and commercial work. | DIY projects, minor repairs, and very small-scale jobs where only a small amount of concrete is needed. |
Advantages of Ready-Mix Concrete
Of course, before determining which is best for your project, you need to consider the advantages and disadvantages of ready-mixed concrete and volumetric concrete.
Advantages of choosing ready-mix concrete include:
- Consistent quality and strength
- Faster project completion
- Reduced labour on-site
- Less material waste
- Cleaner and safer worksite
- Ideal for larger projects
- Convenient delivery scheduling
- Concrete can also be collected directly if required
The flexibility to choose delivery or collection is often one of the biggest benefits of ready-mixed concrete. Why? Because it enables you to choose whichever option works best for your timeline. Either way, you know that when it turns up on site, it will be ready to pour. You don’t need to adjust your schedule to include batching time.
Contractors often prefer ready-mix concrete because it provides consistent quality and reliable performance across every load. Unlike site mixed concrete, which depends on measuring and mixing on-site, ready-mixed concrete is produced in a controlled batching plant to precise specifications. This helps ensure the correct strength, durability, and finish for the project, reducing the risk of errors or inconsistencies on-site. For larger pours and time-sensitive work, this level of reliability is especially important.
Ready-mix concrete delivery also helps keep construction projects on schedule. With concrete delivered directly to site at the required time, contractors can reduce labour time, minimise delays, and complete pours more efficiently. There is no need to spend time mixing materials on-site, which can slow progress and create unnecessary mess or waste. For many builders and homeowners, ready-mix concrete delivery offers a faster, more convenient solution that helps projects run smoothly from start to finish.
Advantages of Site Mixed Concrete
That is not to say site mixed concrete doesn’t have any advantages.
This concrete production and delivery method is often used for small projects for these very benefits:
- Can be mixed in very small quantities
- No dependency on delivery scheduling
- Potentially suitable for hard-to-access areas
However, it is always worth considering the drawbacks of volumetric concrete:
- More labour intensive
- Slower process
- Greater risk of inconsistent strength
- More waste/mess
Which Option Is Better for Your Project?
When comparing ready-mix concrete vs mix-on-site concrete, it is important to know that the better option will depend on several factors.
Type of projects
What is right for a domestic project, might not be right for a large commercial project.
For example, if you need a small quantity for a garden shed base, then volumetric is likely to work well for you.
However if you are running a large commercial construction project that needs a high volume of concrete in a very specific timeframe, ready-mixed concrete might be better.
Budget
As with everything, budget will need to be considered. One of the biggest benefits of mix-on-site is that you can pay for what you lay. As the operators are mixing on site, they can access the amount needed and mix the exact quantity. This often makes this option look cheaper.
However, costs can quickly add up when you include labour and potential waste charges.
Timeline
If you are working to a tight timeframe, ready-mix concrete can save you stress. It will turn up at a time agreed with you, ready to be poured, reducing delays.
Plus, you have flexibility on how you get concrete to your site. Do you want it delivered and poured from one of our drum mixers, or is it easier for someone to come and collect it in their van?
This can be especially useful on projects where multiple trades are working to tight schedules.
Which Should You Choose?
The answer to ready-mixed concrete vs mix-on-site concrete isn’t a straightforward one. Both have their places and the one you should choose will depend on your project. Ready-mix concrete is a popular choice across various projects.
This is typically because it is better for:
- Quality
- Speed
- Reduced labour
- Reliability
Whether you need ready-mix concrete delivery or prefer to collect directly, choosing the right concrete solution can help keep your project efficient and cost-effective.
At AMS (Avon Material Supplies) we produce BSI-accredited concrete at our batching plants in Weymouth and Wimborne for delivery and collection across Dorset and the surrounding areas.
We are able to produce a range of concrete design mixes, from C8/Gen0 through to PAV2 and RC35.
Contact our team by calling 01202 579579 to learn more about our ready-mixed concrete services or to book a collection or delivery.