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We are a leading supplier of ready mix concrete, concrete pumps and liquid screed across England and Wales.

Consider us your dedicated one-stop-shop for all things concrete – whether you require ready mix concrete of the highest quality, or you need an efficient concrete pump for delivering your concrete or screed, we can help.

Not only do we have our Innovative Mini Pump which is ideal to reach those restricted access areas, but we also have the UK’s tallest concrete pump too!

Ready to find out more? Contact our team today or click your location on the map to find out how our services are tailored to your area!

Serving the South West of England with distinction

 

As the UK’s leading one stop shop for concrete services, Wright Minimix has an unrivalled reputation within the concreting industry. We provide high quality ready mix concrete and liquid screed for both commercial and residential purposes. To understand more about what we do and how to choose the right option for your project, please read our complete guide to concrete pumping
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News
What is the difference between concrete and liquid screed?
04th January 2023

If you are new to the world of concrete, then you’d be forgiven for not knowing the difference between ready mix concrete and liquid screed; after all, both are made from a mixture of aggregate, water and cement. However, both concrete and liquid screed are very different in their texture and in what they are used for.

How is liquid screed different from ready mix concrete?


What is ready mix concrete made of?

Ready mix concrete is prepared at a plant to each clients individual specifications using a calculated mixture of aggregates, water and cement, combined with any desired additives to achieve the required result, such as enhanced strength or faster curing times.

The aggregates used in ready mix concrete, usually gravel and crushed stone, typically measure up to 20mm in diameter. These larger aggregates give strength that makes is more suitable for structural building jobs.

What is liquid screed made of?

Liquid screed also contains aggregates, water and cement, however, what makes liquid screed different from ready-mix concrete is the amount and size of the aggregates used. 

Using smaller and fewer aggregates (between 5-6mm) results in a smoother consistency and easier flowability, making the screed closer to a liquid than a solid.

What are ready mixed concrete and liquid screed used for?

Due to their different consistencies, concrete and liquid screed are used for different purposes in construction.

What is ready mix concrete used for?

Ready mix concrete is used for mostly external applications in structural foundations, pathways, shed basesdriveways, fences, paving, walls, footpaths and anywhere else where a strong and long-lasting result is of the utmost importance.

What is liquid screed used for?

Liquid screed on the other hand, is only used internally and is used to create a smooth finish. The flowability of liquid screed means you don’t have to worry about any lumps and bumps on your flooring and can be used to create a protective layer over an existing concrete floor.

Liquid screed can also be used to make the most of an underfloor heating system, as its composition means that it lays flush against pipework in a way that regular ready mix screed would not, eliminating air bubbles and maximising conductivity.


Are you looking for ready mix concrete or liquid screed for your DIY or commercial concreting  project? We can supply you with quality ready mix concrete and liquid screed tailored to suit your requirements. Don't hesitate to contact us to discuss your project with us 0117 958 2090.

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How to Test for Concrete Slump
16th November 2022

A concrete slump test is a method of measuring the consistency of fresh concrete. It’s a simple and easy way to check the workability of multiple batches before they set.

Wright Minimix are industry-leading concrete specialists, supplying ready-mix concrete and liquid screed across the South West. In this post, we explain what a slump test is, why it’s necessary, and how to carry one out.

What is a concrete slump test?

A concrete slump test is a routine procedure for seeing how easily a batch of concrete will flow. It’s low cost, easy to carry out, and produces immediate results.

Why perform a concrete slump test?

Before laying concrete, it’s important to check all batches have the same consistency. This ensures a constant quality and strength throughout. A slump test reveals the water-cement ratio, letting you know whether more or less cement needs to be added to the mix.

Too much water will weaken a mix. If you require a higher workability, you must raise the amount of cement within the mix.

What is the method for carrying out a concrete slump test?

To carry out a concrete slump test, you’ll need a slump cone, a measuring stick, a steel rod, and - of course - the concrete itself. Follow the steps below to find out the slump result of your concrete:

  1. Place the slump cone on a flat surface and stand on the footholds either side.
  2. Pour a layer of concrete into the cone, and use the steel rod in a circular fashion to smooth and compact it around 25 times. Make sure to penetrate the previous layer by about an inch. Repeat this with another layer of concrete on top.
  3. Pour in one final layer and rod it 25 times. The rod should penetrate the second layer, but not go through it fully. If the concrete is compacted beneath the top of the mould, stop rodding and add more concrete, then continue.
  4. After pouring the layers, clear away any overflow from the top and base of the cone. Double check the concrete reaches the top level of the cone.
  5. Slowly lift the cone up, shaking it gently until it is free of the concrete. Place the cone upside down next to the concrete, which will soon start to slump.
  6. Lay the steel rod across the top of the upturned cone so it hangs over the concrete.
  7. Measure the distance from the rod to the top of the slump. The level of slump is measured to the nearest 1/4 of an inch. The recorded results are the slump of the concrete.

Talk to the South’s concrete specialists

Wright Minimix have been delivering premium concrete solutions for over two decades. Whether you’re in need of ready-mix concrete, concrete blocks, or a heavy-duty concrete pump, we’ll be there to provide it on time and on budget.

Get a quote online or by calling our friendly team on 0117 958 2090.

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The Complete Guide to Concrete Footings
07th September 2022

Whether a house, deck, or bridge, every structure needs a strong footing to stand on. 

Concrete footing lies at the very lowest point of a foundation. Responsible for supporting the weight of an entire building, the footing must be strong, durable, and sturdy enough to last years under heavy strain. 

Poorly built concrete footing risks cracking or sinking into the ground. In extreme cases, it can even cause the building to collapse altogether! 

For these reasons, laying out concrete footing correctly is a crucial part of the construction process. 

Wright Minimix are specialists in all things concrete. We have extensive knowledge about using concrete for a variety of applications, and have years of experience working on projects across the south west. 

In our guide to concrete footings, we cover everything you need to know about correctly laying a footing, from determining the right concrete mix to proper site preparation. 

 

What are Concrete Footings? 

 

Footings are the solid concrete at the very bottom of a structure. They distribute the weight of a building across an area, preventing it from sinking into the ground. 

Footings are usually the first thing you build when starting a new construction project. Because they need to support a significant amount of weight, footings must be made of very strong concrete. It should be at least 3500 psi (pounds per square inch). 

There are several different types of concrete footings: footing under a single column, footing under multiple columns, and wall footings. 

Concrete has high compressive strength, meaning it can withstand heavy loads without fracturing, but low tensile strength. This means too much weight can cause it to elongate. For this reason, the concrete mix is usually reinforced with horizontal and vertical rebars. 

 

What is the Best Concrete Mix for Footings? 

 

The mix you use is one of the biggest factors in determining how strong your concrete footing will be. 

Much of this revolves around the aggregate (the stone and sand used in the mix), as the aggregate is what gives concrete its strength. It makes up the bulk of the concrete and adds to its overall compressive strength. More stone means a stronger mix. 

However, using overly coarse or oversized aggregates can cause “honeycombing.” Honeycombing refers to the gaps in the concrete caused by large pieces of aggregate sitting against the rebar, creating an effect that visually resembles a honeycomb. Honeycombing can be fixed by adding finer aggregates and more concrete to the mix, and by mixing the concrete more thoroughly. 

For concrete footings, the best mix to use is: 

  • 1 part cement 
  • 2 parts sand 
  • 4 parts stone (aggregate by volume) 

 

What aggregate size should you use for concrete footings?

The aggregate should be around 1/2 – 1 inch in size. After 28 days of curing, this mix will yield a 3500 psi. 

 

Ready Mix Concrete for Concrete Footings

Although you can mix the concrete yourself, the most time and cost-effective way is to buy a ready mix. With ready-mix concrete, you can skip the laborious process of measuring and mixing and get straight to pouring. 

At Wright Minimix, we create ready-mix concrete to your exact specifications. Because each mix is custom made, there is little or no wastage. There is also no need to have a labourer mix the cement on site, nor do you need to make space for storage. 

 

How Do You Lay Concrete Footings? 

 

The exact method will depend on the structure’s size, shape, and location. It’s also important to note that laying a footing is a complex process that requires significant expertise. Make sure you’re working with experienced professionals who can carry out the process correctly. 

With that in mind, here is an overview of the general process: 

 

1. Prepare the Site 

Before you do anything, it’s important to analyse the condition of the soil on site. The size and dimension of your footing depends on the soil’s load bearing capacity. Soft or troublesome soil requires special care, as there is a high risk of the concrete sinking into it. 

You should also clear out grass, roots, and debris from the idea, and identify the layout and corners of your foundation so it can be structured correctly. 

 

2. Dig the Trench 

Once you’ve determined how wide and deep the trench should be, you can begin digging. 

The hole for your footings needs to be bigger than the foundation, so you and your workers have room to lay down the footings. There should be at least 2 feet on all sides. 

The perimeter hole should be at least 2 feet wide by 2 to 3 feet deep. Make sure to clear out any remaining dirt and plantation afterwards. 

 

3. Set the Rebar 

Rebar support beams prevent the concrete from cracking or crumbling. You should set your rebar in place, then attach the grade pins on top. Each grade pin should be about 2 feet apart from one another, and a foot away from the corners. 

Make sure that the rebar is an equal distance from the sides as it is from the base of your opening. 

 

4. Mix and Pour the Concrete 

If you’re using a ready mix, you can skip straight the pouring. Depending on the size and location of your site, a concrete pump may be your best option for this. 

Wright Minimix has a fleet of concrete pumps available, big and small. This includes our compact Minipump, ideal for hard-to-access sites, as well as the largest concrete pump in the UK

If you’re preparing the concrete yourself, make sure the ratio of cement, aggregate, and water is correctly measured out before mixing. 

Once the concrete is prepared, pour it into the trench. This must be done within thirty minutes of mixing. 

The final step is to protect your footing from moisture and damage with an industrial-quality, acrylic-based sealer. 

 

Trust Wright Minimix for Your Concreting Needs

Need a reputable concrete supplier for your project? No matter what kind of structure you’re working on, we have the exact type of ready-mix concrete you need. Get in touch to arrange concrete for your footing today!

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Bonded vs Unbonded Screed
01st September 2022

When it comes to any building, flooring is an essential part of its structure. This means it’s vital to ensure that your floors are sufficiently strong, durable, smooth and level. This can be achieved through screed flooring, but with all the different types available on the market today, you may be unsure as to what one best suits your building’s needs.

There are two main floor screed designs – bonded screed and unbonded screed. To give clarity, specialist concrete contractors Wright Minimix have developed this guide to explain what exactly screed is, the differences between bonded and unbonded screed along with the benefits and uses of each.

Read on to find out more, or contact us today to discuss a screed flooring quote.

What exactly is screed?

Screed is essentially a thin layer that is laid over concrete to create a smooth, sturdy and hardwearing subfloor. Created by mixing cement with graded aggregates and water, screed can be between 25mm and 100mm in thickness, and can be left as a standalone finish or covered with additional decoration (such as carpet or floorboards).

What is bonded screed? 

Bonded screed is laid onto a mechanically prepared substrate (or underlying layer) using a bonding agent or slurry.  The aim is to maximise the potential bond to the concrete substrate. The optimum thickness of bonded screed is between 25-40mm.

What is unbonded screed?

Unbonded screed, on the other hand is intentionally separated from the substrate by the use of a damp-proof membrane or polyethylene sheet. With unbonded screed, it’s crucial that the drying process isn’t rushed as if it dries too fast, the edges of the screed can warp. It’s recommended that unbonded screed thickness exceeds 50mm.

Will screed stick to concrete?

Technically no as screed is not directly applied to concrete. Screed is applied over a mechanically prepared substrate (if using bonded screed) or a membrane (if using unbonded screed) which is placed over the top of the concrete.

What is the difference between bonded and unbonded screed?

We explain the differences between bonded and unbonded screed and when you would use them below. 

When would you use bonded screed?

Typically, bonded screed is ideal for areas that will regularly endure heavy loads such as driveways and car parks.

What are the benefits of using bonded screed?

The advantages of using bonded screed include how:

Bonded screed is simpler to apply as it’s thinner than any other form of screed

As bonded screeds can be much thinner than any other form of screed, this makes the application much simpler as all that’s required is a slurry of cement and water or a bonding agent.

Reduces shrinkage

By applying bonded screed correctly, shrinkage will be reduced in the future due to additives contained in the bonding agent.

When would you use unbonded screed?

As it uses a damp proof membrane to protect against moisture, unbonded screed is best used in buildings where damp presents a serious problem (e.g. for underfloor heating).

What are the benefits of using unbonded screed?

Reasons for choosing unbonded screed include how:

Unbonded screed prevents settlement

Settlement is the term given to when a floor sinks due to large amounts of pressure. Settlement is a common problem with concrete floors, but as the damp-proof membrane separates the screed from the concrete, the risk of settlement is mitigated.

Unbonded screed reduces shrinkage cracking

Shrinkage cracking accounts for about 80% of screed cracking. By separating the screed from the concrete substrate, the risk of shrinkage is greatly reduced during the drying process.

Unbonded screed guards against damp

As already touched upon, thanks to the damp-proof membrane separating the screed from the concrete, a barrier is created to prevent damp rising from the substrate.

Which is better – bonded or unbonded screed?

We don’t believe one screed design is better than the other – it all depends on your project and how you intend to apply the screed; for projects that need to withstand heavy loads on a regular basis, we recommend opting for bonded screeds.

For projects that take place in areas that are prone to moisture and damp, we suggest choosing unbonded screed.

Whether you require bonded or unbonded screed, trust Wright Minimix to provide the right floor solution for your commercial or domestic needs.

Wright Minimix is a specialist concrete and floor screeding company

Wright Minimix specialise in supplying high quality liquid screed flooring, concrete blocks and ready mixed concrete to customers across the South West of England and South Wales. Our team of vastly experienced and skilled concrete contractors pride themselves on giving expert advice across our commercial and residential clients.

To find out how we can provide screed flooring for your property, or to learn more about our wide array of concrete services, don’t hesitate to call our friendly team today on 01179 582090 or alternatively feel free to leave a message on our contact webpage.

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