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First section of new geogrid laid

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BALFOUR BEATTY engineers last week laid the first section of a revolutionary new geogrid on a small section of the A66 at Scotch Corner in Yorkshire. The Tensar TriAx geogrid is honeycomb-shaped and uses triangles joined to form hexagons as the basic structure instead of the conventional rectangular shapes of the biaxial product. Its inventor Tensar promises significant increases in load bearing capacity and says its use can offer savings of 98p per m 2 in construction costs over conventional geogrid solutions. Independent trials at Nottingham University's Pavement Research Centre, BRE and TRL have shown the new grid to have superior performance in multi-directional stiffness and aggregate con. nement, enabling a reduction in granular layer thickness.

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