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Development of a New Multifunctional Structural Material: High Performance Aerogel Concrete

Welsch, Torsten and Schnellenbach-Held, Martina and Milow, Barbara (2018) Development of a New Multifunctional Structural Material: High Performance Aerogel Concrete. In: Proceedings - 1st International Conference on New Horizons in Green Civil Engineering (NHICE-01). 1st International Conference on New Horizons in Green Civil Engineering (NHICE-01), 25.-27.April 2018, Victoria, Canada.

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Abstract

The Institute for Structural Concrete (ISC) at the University of Duisburg-Essen developed in cooperation with the Institute of Materials Research at the German Aerospace Center (DLR) a new multifunctional structural material: High Performance Aerogel Concrete (HPAC). Chief ingredient of HPAC is silica aerogel granule which is embedded in a high strength cement matrix. Aerogel Concretes described so far in the literature exhibit very low thermal conductivities of 0.06    0.10 W/(mK) and very low corresponding compressive strength of fcm  2.5 MPa. Thus far the applicability of Aerogel Concrete as a building material for load bearing walls had to be discussed. Previous attempts to achieve the compression strength of normal strength concretes (fcm  20 MPa) involved a significant rise of the thermal conductivity up to   0.55 W/(mK), which counteracts the benefits of Aerogel Concrete in thermal insulation. The mixtures optimized by the ISC achieved thermal conductivities of   0.25 W/(mK) at a compressive strength comparable to Normal Strength Concrete (NSC). Compared to previous investigations, the thermal conductivities were considerable less over the full spectrum of investigated compressive strength in the range 2 MPa  fcm  25 MPa. Beyond this improved correlation between compression strength and thermal conductivity, HPAC shows some remarkable properties that make it a real multifunctional structural material: By means of pull-out tests the general suitability of HPAC for reinforced construction elements was proved. Shear tests and adhesive tensile tests showed that it is possible to fabricate graded construction members made of HPAC. The building physical properties are also very promising: The measured sound absorption is higher compared to normal strength concrete. HPAC is water-repellent, open to diffusion and fireproof (melting point approx. 2000°C).

Item URL in elib:https://elib.dlr.de/119888/
Document Type:Conference or Workshop Item (Speech)
Title:Development of a New Multifunctional Structural Material: High Performance Aerogel Concrete
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Welsch, Torstentorsten.welsch (at) uni-due.deUNSPECIFIED
Schnellenbach-Held, Martinam.schnellenbach-held (at) uni-due.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:April 2018
Journal or Publication Title:Proceedings - 1st International Conference on New Horizons in Green Civil Engineering (NHICE-01)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aerogel Concrete, Lightweight Aggregate Concrete, (Ultra) High Performance Concrete ((U)HPC), GFRP Reinforcement, Heat Insulation
Event Title:1st International Conference on New Horizons in Green Civil Engineering (NHICE-01)
Event Location:Victoria, Canada
Event Type:international Conference
Event Dates:25.-27.April 2018
Organizer:University of Victoria
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogele
Deposited By: Milow, Dr. Barbara
Deposited On:13 Nov 2018 08:42
Last Modified:31 Jul 2019 20:17

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