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Investigations on the Suitability of Alternative and Supplementary Cementitious Materials to produce High Performance Aerogel Concrete.

Authors :
Welsch, Torsten
Schnellenbach‐Held, Martina
Source :
CE/Papers; Dec2023, Vol. 6 Issue 6, p1594-1603, 10p
Publication Year :
2023

Abstract

High Performance Aerogel Concretes (HPAC) are produced by embedding silica aerogels in high‐performance matrices, which were previously based on finely ground Portland cement CEM I 52.5 R and microsilica. On the one hand, this ensured a comparatively high compressive strength, but on the other hand it was associated with large shrinkage strains and a high global warming potential (GWP). In the following, approaches are presented on how these disadvantages can be counteracted by replacing Portland cement with alternative (ACM) or supplementary cementitious materials (SCM). In the experimental investigations, calcium aluminate cement, calcium sulfoaluminate cement, calcium sulfoaluminate belite cement and a CSH phase binder were used as ACMs; limestone powder, calcined clay, fly ash, glass powder, rice husk ash, brick dust and ground granulated blast‐furnace slag were used as SCMs. Based on extensive fresh and hardened concrete tests, it could be shown that with the (partial) replacement of Portland cement by ACMs or SCMs, High Performance Aerogel Concretes can be produced that have significantly reduced shrinkage deformations and a lower GWP with an unchanged good relationship between compressive strength and thermal conductivity. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
25097075
Volume :
6
Issue :
6
Database :
Complementary Index
Journal :
CE/Papers
Publication Type :
Academic Journal
Accession number :
174033285
Full Text :
https://doi.org/10.1002/cepa.2982