Published: January 2014 | Category: Activity management , Research programme , Research & reports | Audience: Road traffic engineers & consultants
Leutner shear tests to measure bond strength and flexural beam tests to measure flexibility were conducted on specialist surfacing resins used in New Zealand for coloured and high-friction surfacings.
The flexural beam tests found the specialist surfacing resins, except for one, to be very flexible at 5 and 20 degree test temperatures.
This flexibility showed that the specialist surfacing resins should be able to cope with high pavement deflections and rut depths up to 20mm and the underlying asphalt would crack before the specialist surfacing did.
Leutner shear tests showed one out of five resins tested on fresh asphalt cores achieved full bond strength (the same as the asphalt mix shear strength) and all resins achieved the full bond strength when the asphalt surface was water cut before applying the specialist surfacing resin.
Keywords: calcined bauxite, coloured surfacings, epoxy resin binder, flexural beam test, high-friction surfaces, Leutner shear and bond strength tester, pavement design, polyurethane binder, skid resistance, specialist surfacings
