DOI: 10.5176/2301-394X_ACE14.63
Authors: Dipl.-Ing. (FH) Marco Wolf, M. Eng and Prof. Dr.-Ing. Konrad Hinrichsmeyer
Abstract:
Ultra-High Performance Concrete, abbreviated as UHPC is a concrete that is known for its outrageous compressive strength, durability and its highly frost and de- icing resistance. Being highly chemical resistant, due to its characterizing dense microstructure, leads to the idea of gas impermeable wall elements used for vacuum based heat insulation. Using a very low amount of water and a high amount of cement ensures very low water cement ratios from 0.25 down to 0.14. Combining that with superplastizisers and sub micrometer fines to extend the particles size range and allowing the hollow spaces in between the cement grains to get filled up, the concrete results into a high density packing structure, which makes the UHPC more worthy than just strong and durable. This paper shows some of the research results in using UHPC for the construction of multifunctional wall elements and its influence on new vacuum heat insulated systems and energy saving opportunities.
Keywords: ultra-high performance concrete, durability, permeability, dense microstructure, vacuum, insulation, multifunctional wall elements, energy savings
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