Submission ID 115244
| Session Title | CO - Cost-Effective Construction Solutions for an Aging and Underfunded Network |
|---|---|
| Title | The stress resilient membrane (SRM bit) for concrete, paved and asphalt surfaces |
| Abstract | The functionality of infrastructure and roads has an impact on road safety, the economy and people's quality of life. The poor condition of roads in some places is due to a number of factors, including the high volume of traffic, ageing, lack of investment and extreme weather conditions in some places. However, particularly in the context of maintenance and/or repair, wrong decisions are often made in the chosen procedure. For example, due to economic considerations or political decisions, existing road structures are increasingly being rehabilitated or overbuilt with a new asphalt surface course in the course of replacing the top asphalt layer, regardless of the existing condition. However, new asphalt layers that are built over (old) cracked asphalt, concrete or paved surfaces often suffer from reflection cracks after a relatively short period of use, which are caused by the horizontal movements and thermal expansion of the underlying concrete or paved base. This effect is exacerbated by the existing traffic load. The resulting cracks in the asphalt then allow moisture/water to enter the structure and inevitably lead to an acceleration of crack propagation up to complete system failure. As a result, this process leads to traffic restrictions for road users and to premature and costly renewal measures. One possible solution is the complete elastic decoupling of two otherwise incompatible layers (e.g. asphalt on concrete/paving etc.). A special stress-relieving and stress-resistant membrane (SRM bit) based on a bituminous waterproofing mastic with a highly branched polymer matrix was developed for this purpose. This acts as a highly elastic, crack-bridging and water pressure-tight membrane over the entire service temperature range. The special properties of the SRM bit across the entire service temperature range were demonstrated in laboratory tests using physical and rheological analyses and dynamic and static tests on composite systems. The enormous elastic potential, the extreme adhesion and cohesion forces and self-healing effects were demonstrated. In addition, these results have already been validated in several construction projects. |
| Presentation Description (for App) | Sustainable construction methods that are both resource-saving and economical are required to maintain the infrastructure. A newly developed stress-resistant membrane for asphalt, concrete and paved roads can be used for this purpose, which guarantees very good performance properties at low and high temperatures. Laboratory and practical results will be shown. |
| Author and/or Presenter Information | Daniel Gogolin, Engineering Company PTM Dortmund mbH, Germany Alexander Buttgereit, Other |
