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Construction materials


Quarrying is at the heart and soul of our business. Extracting aggregates from the ground is the starting point in the lifecycle of our products and services. Without stone, society as we know it would be a very different place. There would be no buildings, no filtered water and no infrastructure.

We use quarried stone to make asphalt, ready-mixed concrete and a wide variety of precast concrete products – everything from stairs and beams to kerbs and decorative patio slabs. All these products are used as materials in building the world around us.

What we produce

  2012 2013 2014 2015

Aggregates - million tonnes 27.2 28.4

Ready-mixed concrete - cubic metres 22.12 2.1

Asphalt - million tonnes 4.5 4.7

Precast  - million tonnes 2.1 2.0

Secondary aggregates (processing)
- million tonnes
1.0 0.9

Sales of recycled material (million tonnes) 0.5 0.5

* Figures pre 2009 were registerd as quantity sold rather than quantity produced


Materials used in our value added products

  2012 2013

Bitumen - tonnes 204,039 215,252
229,803 242,745

Aggregates - million tonnes 9.54 10.06
10,59 11.68

Cement - tonnes 686,217 761,856
766,582 796,055

Pulverised Fly Ash (PFA) - tonnes 125,417 162,035
159,043 75,754

Ground Granulated Blast furnace Slag (GGBS) - tonnes 97,072 197,569
300,752 388,469

Recycled Asphalt - tonnes 326,800 455,893
545,152 609,700
Packaging - tonnes 11,896 13,771 12,822  15,783


One industry’s waste

Where possible, quarried stone is complemented with recycled and secondary alternatives to create more sustainable construction materials.

Waste from power stations can be used as a part replacement for cement in ready-mixed concrete. We use Pulverised Fuel Ash (PFA) and Ground Granulated Blast Furnace Slag (GGBS). The resulting product has lower embedded carbon, reduces the need for virgin cement and prevents the waste materials going to landfill.

In Devon we produce a unique construction material, which is a by-product of another company’s processes. The china clay industry removes and tips aggregates it has to remove to get to the clay deposits. Aggregate Industries processes this material to create a range of construction materials including single sized and graded aggregates and decorative stone. 

By-products of other industries can also be used in concrete mixes, these include china clay waste and crushed green bottle glass, both of which may be used to replace virgin materials in mix designs

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