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| Material |
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Ceramics - clay fired at 1100 °C. |
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Concrete - set concrete mix. |
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| Clay paver 45 mm thick = Concrete paver 80 mm thick |
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45 mm. Clay pavers 45 mm thick have parameters which are not only comparable but even exceed concrete cubes 80 mm thick. |
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80 mm. Concrete pavers are made of a concrete mix with a resistance up to 50 MPa (with a thickness of 80 mm). |
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| Compressive strength |
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200 MPa (45 mm thick), 4 times resistant because moulded clay forms ceramals during firing which guarantee the high resistance of the material. |
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50 MPa (80 mm thick). It is a common concrete poured to moulds which hardens for 28 days. |
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| Colour |
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Durable and resistant to fading with uniform colour across the paver. We obtain a wide selection of colours by using various clays which burn naturally into several colours without any artificial additives or dyes. Life-long colour guarantee. |
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Non-durable and non-resistant to fading. Only the grey colour is natural; the other colours are obtained by adding artificial dyes or by applying a coloured wearing layer on the surface. |
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| Applications |
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A simple and timeless form opens up great possibilities for different designs. The same pavers can be used to make edges, stairs, low walls and other small architecture details. |
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Although they come in several forms, they do not allow as many possibilities for different designs because they have only one face. For edges, you need additional products: kerbs or concrete palisades. |
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| Number of surfaces |
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5 possible surfaces of a single paving brick (2 flat surfaces + 2 end faces + 1 side face). |
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1 (only one flat surface). |
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| Skid resistance |
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The highest skid resistance (U3 class) under all conditions (dry and damp surfaces) because their surfaces do not become polished with wear. |
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It is satisfactory unless the aggregate material which is easily polished becomes uncovered during normal use. With time, concrete pavers become polished; hence, their skid resistance lowers. |
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| Abrasion resistance |
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The highest A3 class. The average amount of the material abraded during tests according to PN EN 1344 should not exceed 450 mm3 (a clinker brick with dimensions of 200 x 100 mm can be abraded in the test by 0.025 mm only). Up to 40 times lower abrasibility. |
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Class 1: an average amount of a material abraded in the test according to PN EN 1338 should not exceed 18,000 mm3 or 5,000 mm2 (a concrete cube of 200 x 100 mm can be abraded even by 0.9 mm), that is, almost 40 times more than a clay paver. |
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| Resistance to weak acids |
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Durability. Resistance to weak acids e.g. lemon juice or vinegar, is a feature of ceramics because the clays used to produce pavers changes its structure into a non-reactive form after firing. Therefore, it becomes resistant to acids, detergents and other caustic agents. |
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Low durability. The activity of acids and their solutions leads to corrosion of concrete. For example, the effect of sulphuric acid solution (acid rain) on concrete causes cement to transform into hydrated calcium sulphate (gypsum) that can be very easily washed out by water and the product becomes less resistant. |
