Tensar TriAx geogrid was a huge leap forward for the geosynthetics industry when it was launched in the UK in 2007. Since then, it has become an accepted alternative to traditional subgrade stabilisation and flexible pavement solutions, benefiting thousands of projects around the world.
“From its first project, the A66 Scotch Corner to Carkins Moor improvement scheme – where it enabled a road junction to built over an old landfill, to the present day, TriAx has proved to be a popular choice for geotechnical engineers and pavement designers,” said Tensar VP for Global Applications Technology Tim Oliver. “So much so, that our customers, have installed more than 250M.m2 of TriAx globally in the last ten years.”
TriAx was introduced following five years of development by Tensar and performance testing by the UK Transport Research Laboratory and subsequent accelerated pavement testing (APT) by the US Corps of Engineers. This work, plus multiple other research studies, has demonstrated the effectiveness of TriAx to mechanically stabilise granular materials; reducing the thickness of road aggregate layers, mitigating differential settlement, and enabling infrastructure to be built over weak and unstable ground.
TriAx was awarded European Technical Approval certification for ‘the stabilisation of unbound layers by way of interlock with the aggregate’ in 2012. Since 2014, all of Tensar’s flexible road pavement designs have used TriAx, as part of the Tensar Spectra Pavement Optimisation system.
“Research, development and testing has continued, as we have sought to refine and improve TriAx and to provide further, independently-verified, evidence of its benefits,” Oliver said. “For example, results of the US Corp of Engineers’ latest full-scale APT testing, published earlier this year, demonstrated the effectiveness of TriAx to reduce pavement surface deformation and greatly increase traffic life.”
TriAx has won numerous industry accolades, including the New Civil Engineer Innovation Award in 2007 and two International Geosynthetics Society awards, in 2009 and 2010. Most recently, Spectra Pavement Optimisation was named Highways Industry Product of the Year at the 2017 Highways Awards.
“We would like to thank all the infrastructure owners, designers, contractors and specialists we have worked with over the past decade,” Oliver added. “They have played an invaluable role in expanding the use of TriAx on projects to save money, speed up construction and extend the operating life of infrastructure around the world.”