Sustainability aspects are becoming increasingly important in the
successful planning of road construction projects. Particularly in the case of
large projects, such as the system of public-private partnerships, concepts are
required for both reducing CO2 emissions and making the greatest
possible use of the road construction materials. The aim must be to create a
quality infrastructure that is based as far as possible on the use of secondary
raw materials and has the smallest possible CO2 footprint during
manufacture and installation.

One way to achieve these goals is to design the so-called "foundation
layers". These consist almost entirely of recycled building materials
(RC-materials), which, if possible, accrue in the same project, are produced
with as little primary energy as possible, and can be produced within the
construction site environment. Cold construction methods with mobile central
mixing plants are suitable for this purpose, which can produce paving mixtures
based on foamed bitumen that neither have a complete coating - as is the case
with asphalt mixtures – nor do they have a rigid superstructure with the risk
of reflection cracking due to extensive use of cement.

This project is about the technical conception of these foundation layers,
presents the current status of regulation creation in Germany, and makes a
recommendation on how these layers should be evaluated in the context of
sustainability. The determination of the CO2 footprint of the
secondary raw materials used plays a decisive role in the practical
applicability.

• Prof. Dr.-Ing. Borislav Hristov(Projektleitung)

• REDUCING RESOURCE CONSUMPTION AND CARBON DIOXIDE FOOTPRINT USING FOUNDATION LAYERS FOR ROAD PAVEMENTS
  
  Artikel › Journalartikel › 2024