Clean Tech Block is a project from Gråsten Teglværk, the University of Aalborg and the University of Ljubljana. A few posts were already written about Aalborg and in fact, they collaborate with Ljubljana. I had the occasion to met very interesting people: Y. Yue and Martin B. Østergaard in Aalborg and Jakob König in Ljubljana.
This team did what I believed for a long time was impossible. They managed to foam directly waste glass (without melting) with closed cells, filled with CO2 with a minor content of H2. In my opinion, this is the best progress in cellular glass land in the last five years. In this way, cellular glass with 0.040 W/mK and 600 kPa compressive strength based on waste glass without remelting becomes possible at prices of about 150€/m³. They want to use this cellular glass between bricks to able to build houses like explained here under. It is a Google translation from Danish to English.
CleanTechBlock 2 – Energy-saving facade cladding
The project’s vision is to develop and document a wall solution that complies with the building regulations in 2020, which at the same time appears as an aesthetically attractive wall with a long service life. The idea of the project is to build houses with prefabricated wall blocks consisting of cellular glass sandwiched between two bricks. The house wall will be fireproof and total water and windproof.
We aim to develop a new energy efficient masonry solution that meets future building standards. The masonry will consist of smaller blocks, which in turn consist of cell glass assembled between two bricks. These wall blocks are called CleanTechBlock (CTB). The masonry is intended to be introduced in the market for parcel and villa houses.
The following activities have been launched to complete the overall goal:
1) The insulation value of cell glass must be upgraded and upgraded from laboratory to pilot scale production to assess whether it is technically and profitable with industrial production.
2) CTB requires brick in a particularly large format. Large bricks are challenging to produce and optimization of the shape is necessary.
3) The mechanical and thermal properties will be tested on model walls and a one-to-one house made by CTB. Construction technique and speed are evaluated during the construction process.
The house will be used to get feedback from contractors, architects and users. The results are gathered in a business model to show whether CTB has the business potential.