Awards 2019

Tunnel testing by Polyglass – how waterproof is your project?

IA19_Pict_Polyglass_CrossrailGetting the right materials for a waterproof PVC tunnel membrane can save a lot of money and grief in the future, especially when it’s to last at least a century.  While waterproofing a system can cost 2-3% of the total cost, water causes about 60% of insurance claims. Why not test those materials first?

That’s why Polyglass worked with the Department of Environment in Turin to devise an accelerating test, simulating real conditions of a membrane in a tunnel over time, using four layers to extrapolate long-term results.  They include concrete, polypropylene geotextile, PVC waterproofing membrane and another slab of concrete to simulate the final lining.

A constant flow of water passes through the geotextile in order to simulate the drained water at three different temperatures,” says Alessandra Greta-Graticola, head of marketing at Polyglass.  “We measure any changes in dimensions, weight, tensile strength and foldability at low temperatures, comparing the new with the simulated aged versions.

True to its name, Polyacademy also offers courses – including webinars – on waterproofing. To help you get it right the first time.