The motorway of tomorrow is built with aggregates from the waste incineration of today

Durable and economical

Roads must be constructed in a way that restricts the negative long-term effects of exposure to traffic and climate. Alongside detailed planning processes, the selection of construction materials and execution of works comprise the most important influencing factors that will ultimately ensure the durability and economic viability of roads. At the same time, ecological aspects, such as the protection of the earth’s resources and environment must be taken into account.

Re-thinking: Using secondary materials where possible

As a rule, current regulations pertaining to road construction and earth works will mostly require that only natural aggregates be used. And alternatives are unlikely to be explored. However, in those countries where regulations pertaining to the use of secondary aggregates exist, their use in construction has proven to be as safe as, and more economic than, conventional construction with primary aggregates.

Main applications in road construction

The chemical and technical properties of granova® comply with requirements pertaining to road applications for:

  • Embankments and Fill
  • Sub-grade
  • Capping
  • Unbound Mixtures for Sub-base and Base
  • Hydraulically bound mixtures for Sub-base and Base
typical pavement

Typical pavement

Earthworks

Apart from earthworks needed for roads, there are other constructions requiring significant amounts of mineral material. Traffic, for example, has significant adverse effects on humans and the environment – e.g. in the form of exhaust emissions, fine dust and noise. Accordingly, protection is needed and embankments along roads can be alternatives to other kinds of noise barriers such as walls. Similarly, significant amounts of material are often needed for landscaping or backfilling.

The financial capacity of local authorities often restricts the carrying out of such projects.
It is especially here that secondary aggregates form a feasible alternative.

Although regulations vary by country, the safe use of granova® is subject to the following conditions:

  • In construction sites outside of water protection areas, flood areas and outside of hydro-geological sensitive areas
  • At a minimum distance of 1 metre to the highest ground water level
  • At a minimum distance of 0.5 metre to corrosion prone buildings
  • In applications existing under a watertight surface like concrete or asphalt

Based on national regulations and site detail, the rules can become less strict, allowing for a wider field of application, for example, some countries permit a smaller distance to the ground water level dependent on geological and hydrogeological site conditions and type of construction.