Holistic Innovative Solutions for an Efficient Recycling and Recovery of Valuable Raw Materials from Complex Construction and Demolition Waste (HISER)


higher recovery of raw materials from Construction and Demolition Waste
higher recovery of raw materials from Construction and Demolition Waste

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New building products

HISER project emphasises the following building products under pilot manufacturing processes and pilot execution conditions:

  • New green cements: A new generation of lower CO2 footprint and lower embodied energy cements (up to 10% when comparing to current patented products) by using alternative raw materials recovered from C&DW (recycled gypsum, recycled glass and fine recycled concrete and ceramic aggregates).

  • Concrete:
  1. Practical model of the phenomena and mechanisms resulting in high-quality concrete with higher incorporation levels (higher than 30%) of recycled aggregates (coarse and fine fractions);

  2. Wide validation of the model on different types and conditions of concrete waste and using different process parameters for the production of the recycled aggregates. This will allow the demonstration of the degree of robustness of the technology and product to the building sector;

  3. New green concrete recipes with slightly lower cement amounts in favour of fine recycled aggregates inducing hydraulic and pozzolanic reactivity;

  4. New reinforced concrete with C&DW recovered fibers.

  • Bricks: New bricks manufactured with recycled ceramic material

  • Gypsum: New families of gypsum based products containing not also recovered gypsum but also wood fibers, mineral wool fibers and other inorganic materials from C&DW (replacement levels of virgin raw materials by recycled ones ranging from 10% to 50%). Diverse optimized recipes and prototypes will be performed for the following type of products: VOC-absorbing plasterboards, fire resistant plasters and gypsum plasterboard composite panels. This approach will offer new possibilities to produce strong and lightweight structures based on the circular economy concept and also with excellent functionality and competitiveness.

  • Composites: Main targets related to composites are:

  1. The improvement of the performance of WPCs to a high level by minimizing the fiber degradation;

  2. Diminishing of the costs of WPC-manufacturing by >50% to allow WPCs being sold at about the price level of wood products and to become a volume business with "green image" by year 2020 in Europe. A major qualitative progress in the development of next generation "high performance, low cost" WPCs can be obtained by new composite co-extrusion process techniques and multilayer product structures from C&DW wood incorporating molecular orientation and cavitation. For both plasterboards and composites, the supply chain of C&DW wood based material does not exist. So it must be first created and made reliable and consistent to guarantee sufficient amounts of sorted grades of suitable fractions of recovered wood to build long term new business. Therefore the supply chain has to be feasible in industrial and commercial criteria. One target is to clarify the performance of different C&DW wood fractions for the production of fiber based products. Based on these results and needed processing steps, classification system for C&DW wood fractions will be created.

The project has received funding from the European Union's  Horizon 2020 research and innovation program under grant agreement No 642085.


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