Products > Pavers

RIBA Core Curriculum
- Design, construction and technology

Knowledge level
- General Awareness

This CPD looks at the benefits of clay paving and where and when it can be used. It will provide an overview of the different sizes and forms of clay pavers and considers how to choose the right construction method, including a brief look at rigid and flexible construction for clay pavers.

Laying patterns, the importance of edge restraint and British Standard BS EN 1344 are also featured in the course.

In this section
- Company Overview
- What is a clay paver?
- Why Choose Clay?
- What is BS EN 1344:2013 and why is it important?

            
                    
Navigate through each step of the CPD using the left and right arrows to review the content. At the end of each section are some questions, these are required if you wish to obtain a certificate upon completing the course.                     
                                     
            
    

WHO ARE WIENERBERGER?

Paver_CPD_Who are Wiener
  • The World’s Number One Brick Maker
  • Founded in Vienna in 1819
  • Global expansion 1986
  • Acquisition of several known brands
  • 234 producing plants worldwide
Paver_CPD_Family Tree
  • 27 producing countries Operating in the US, Canada and India
  • 11,848 employees €1.8 billion annual turnover
  • A wide range of clay building solutions
  • No. 3 brick manufacturer in the UK
  • No 1 paving manufacturer in Europe

WHAT IS A CLAY PAVER?

Paver_CPD_Porche Garage

Clay pavers are a sustainable product, naturally sourced from clay quarries in the UK and river beds in the Netherlands.

They are manufactured to British Standards, BS EN 1344.

 

 

Wienerberger has over 100 years experience manufacturing pavers and has factories in the UK and Europe that make pavers.

The UK factory is renowned for producing blue pavers, which is a property of the high quality local clay.

CREATING A LASTING LEGACY - WHY CHOOSE CLAY?

Paver_CPD_Dutch Plain
Sustainable

Sustainable
Rivers naturally deposit clay each year and in the Netherlands, Wienerberger dredges small amounts of this clay which is returned during flood seasons each year.

By removing the clay the water level is reduced, which in turn decreases the impact of flooding, enabling local villages to stay drier during the wet months. If the clay is not dredged then flooding can be considerably worse.

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Colour Fast

Colour Fast
Clay pavers are available in completely natural colours, they do not fade, keeping their colour for their entire lifespan.

As the colour is natural, it runs through the entire block rather than just being a pigment on the surface.

During firing the Kiln can reach up to 1100⁰ degrees and the firing conditions determine the colouring in the product.

Some of the larger paver Kilns in Europe are over 200m long.

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Durable

Durable

All pavers have to meet certain criteria and are tested used appropriate methods to ensure that they are suitable for their application. For example, a paver used on a patio would not need to withstand the same pressures of those that are used in a town centre.

To ensure that pavers can tolerate the changing seasons, from the heat of summer to the wet and freezing winter, products are extensively tested.

Clay pavers achieve a classification of FP100 meaning they are freeze / thaw resistant. To attain this rating, pavers are tested by being soaked in water, then cooled until all of the water that they absorb is frozen. They are then repeatedly thawed and frozen 100 times to ensure they maintain their integrity and strength.

HOW DUTCH PAVERS ARE MADE

CLAY PAVER PERFORMANCE

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Breaking Load – Measures the breaking point of the paver and helps determine the build and the construction method the pavers can be used in.

It is measured on a scale from T0 – T4 (T4 being the strongest) and two results are formed.
- Mean Transverse Breaking Load – This is the average of 10 pavers tested
- Minimum Individual Value – Minimum strength of any one paver in the test

Clay pavers can achieve a T4 rating (Greater than 80N/mm)

CLAY PAVER PERFORMANCE

Paver_Table2
Abrasive strength – The test in undertaken with a disc of abrasive material wearing away at the paver. The volume of the groove in the paver determines the abrasive resistance. This is used to measure general wear and tear, class A3 being the most resistant to abrasion.

Skid Resistance – This measures the surface of the paver for anti slip / skid resistance. A pendulum is used in the test to see how long it takes to wear down and creates an SRV (Slip or Skid Resistance Value), U3 being the highest skid / slip required for the British Standard. It’s worth bearing in mind when ground or glazed products are specified, that this will reduce the skid resistant value.

CLAY PAVER PERFORMANCE

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It is always worth bearing in mind that clay is a natural product and if required, there are simple guidelines to test tolerances required for the British Standard

- The test sample should comprise of at least 10 pavers (Selected at random from various packs)
- Each block should be measured with a caliper gauge (or similar precision)
- The length, width and depth of each paver should be measured to the nearest 0.5 mm (From the mid-point, if spacer nib in the middle, get as close to mid-point as possible)
- Take the Square Root of each dimension and multiply by 0.4 in accordance to BS EN1344 for individual block size tolerance

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CPD Q&A

You’ve reached the end of the CPD. To make sure you’ve taken on board the key learnings of this course, please fill out the quick multiple choice Q&A below. This will certify that you have completed the CPD and provide you with an email certificate, which, if the course is accredited, you can share with RIBA.

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What is the standard for Manufacturing and Testing Clay Paving?

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What is the name for the freeze/thaw resistance classification that clay pavers achieve?

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