Newly constructed low-noise asphalt surface fails

Questions are being asked over the construction of a new section of the A1 autobahn in Germany. The highway stretch is being scrutinised due to surface failures and lies close to the city of Bremen but has been open for less than three months.
May 15, 2012 Read time: 1 min
Questions are being asked over the construction of a new section of the A1 autobahn in Germany.

The highway stretch is being scrutinised due to surface failures and lies close to the city of Bremen but has been open for less than three months.

The road carries around 70,000 vehicles/day and its construction was intended to reduce congestion between the port cities of Hamburg and Bremen. Numerous potholes are reported to have appeared in the surface of the highway. Given the recent severe weather, failures of older road surfaces are expected but these problems should not occur on links that have been so recently completed.

The investigations will focus on how water penetration into joints could have already caused the freeze-thaw process to break up the running surface or whether other problems such as material segregation or incorrect mix design could have been factors. The low-noise asphalt surface is crumbling at various points along the 73km section recently opened.

Asphalt milling, paving & compaction Highway & Network Management

Related Content

  • A rejuvenator derived from pine trees and natural asphalt
    November 20, 2015
    This month we look at two additives from natural sources: a rejuvenator derived from pine trees and naturally occurring asphalt - Kristina Smith writes One of the problems experienced with pavements containing RAP is that, although they exhibit good rutting resistance, they often fail early due to fatigue cracking. Biorefiner Arizona Chemical has just unveiled independent test results for its SYLVAROAD RP1000 Performance Additive that it says demonstrate that the rejuvenator can help create mixes that ar
    Read More
  • New tests for modified bitumens and mixes with RAP
    December 19, 2014
    This month we learn about a new test which is helping to predict the performance of asphalt mixtures containing recycled materials and modifiers, and we showcase some of the new testing equipment recently launched - writes Kristina Smith Researchers in the US have come up with a new test to help owners and contractors better predict the performance of their roads. “The problem is that the current tests cannot determine the performance of new materials,” said Dr Haleh Azari, manager of the AASHTO Advanced P
    Read More
  • Improving barrier safety for motorcyclists
    February 23, 2012
    Mike Woof reports on delays to better barrier safety for Europe’s powered two wheeler riders. Safety for vulnerable road users continues to be a matter of some debate in Europe. Although powered two wheelers account for a comparatively small number of Europe’s vehicles as well as total distance travelled, they account for a disproportionately large number of accidents. Statistical data shows that by far the greatest risk to users of powered two wheelers as well as other vulnerable road users comes from driv
    Read More
  • Replace bridge for Vancouver’s Massey Tunnel could aid congestion
    December 21, 2015
    Opponents of a proposed 10-lane bridge near Vancouver, Canada, said the structure will encourage urban sprawl in a region that is already struggling with a booming population. The British Columbia provincial government recently opened the final round of public consultation for the planned 3.3km toll bridge likely to cost around US$2.54 billion.
    Read More

Highlighted Content