ReWorth Blocks
Transforming the Construction Industry - ReBlock by ReBlock
We aim to make the construction industry more circular by upcycling currently unused waste streams into established building products.
COLAB-Projekt aus dem
Projektprofil
Bau & Immobilien
#Concrete
#Recycling
#Construction
#Sustainability
Geplanter Tech Transfer:
Q4 2026
Gründung:
11.11.2025
Geschäftszweck: Entwicklung, Herstellung und Vermarktung nachhaltiger Baumaterialien auf wissenschaftlicher Grundlage, insbesondere in Kooperation mit Forschungseinrichtungen wie dem Fraunhofer-Institut. Ziel ist die Bereitstellung innovativer, ressourcenschonender Baustofflösungen für die Bauwirtschaft, unter Berücksichtigung ökologischer, technischer und regulatorischer Anforderungen.
Unternehmenssitz: München
Kontakt: info@reworthblocks.com
Gründer:
Esther Heyse
https://www.reworthblocks.de
Problem
5 million tonnes of fine fraction construction and demolition waste (CDW) go to landfill every year in Germany alone. At the same time, primary resources are becoming more and more scarce. This results in a dual pressure on the construction industry to reuse its waste.
Lösung
We use fine fraction CDW to replace 50% of the raw materials in aerated concrete blocks, an established and commonly used construction material, using a patented Fraunhofer technology. We get this CDW for free and are able to drop into existing processes, both on the manufacturing and on the construction side of things. Thereby we can offer a price competitive material which meets all industry norms and does not require any adjustment or risk-taking on the part of the (inherently conservative) construction industry. Almost as a side benefit, this price-competitive material is far more sustainable than regular aerated concrete due to the reuse of waste.
Produkt
Our material can be made into blocks or slabs of almost any size and shape, allowing for both traditional construction as well as prefabricated buildings.Alleinstellung
The patented process innovation allows for the first time the introduction of a variable and heterogeneous resource stream into the sensitive material composition of aerated concrete. In this way, the critical resource quartz sand can be substituted by more than 70% through a previously unused mineral waste stream, making aerated concrete a fully circular building material.Geschäftsmodell
Our business model centers on establishing ReBlocks as a new dedicated line within the aerated concrete market, covering the full value chain from sourcing to distribution.Highlights
- Reuse of construction waste
- Price competitive sustainable construction material
- Female Founder
- Patented technology
- Sustainable innovation
Kunde / Markt
Real estate developers, Architects, and major construction companies have already voiced their interest in our product and signed letters of intent with us.
Team
Esther, CEO: MSc in Sustainability Entrepreneurship and Innovation from ESCP, hands-on experience in the construction industry and a passion for sustainable innovationOskar, CTO: MSc in Materials Science and Engineering from ETH Zürich, experience in both lab research and consulting in the construction industry
Antonia, CPO: BSc in Architecture and Construction Management from KEA - Copenhagen School of Design and Technology, practical experience as construction site manager and from architectural firms.
Fraunhofer IBP Team: Experts in aerated concrete and responsible hands-on lab research
Let’s connect! If you're working in the construction sector, we want to hear from you.
If you work in the construction sector and share our passion for a sustainable transformation, reach out to us! We are always happy about insights and contacts or future partnerships.