Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-10T08:39:42.936Z Has data issue: false hasContentIssue false
  • English
  • Français

Numerical Modelling of the Strength of Highly Porous Aerated Autoclaved Concrete

Published online by Cambridge University Press:  10 February 2011

Thomas Schneider ,
Georg Schober  and
Peter Greil
Thomas Schneider
Affiliation:
University of Erlangen-Nuernberg, Department of Materials Science, Glass and Ceramics, Martensstraße 5, D-91058 Erlangen, Germany
Georg Schober
Affiliation:
Hebel AG, Materialtechnische Entwicklung, Postfach 1353, D-83343 Fürstenfeldbruck, Germany
Peter Greil
Affiliation:
University of Erlangen-Nuernberg, Department of Materials Science, Glass and Ceramics, Martensstraße 5, D-91058 Erlangen, Germany
Get access

Abstract

Highly porous building materials like aerated autoclaved concrete are characterized by low thermal conductivity and high mechanical strength, which both strongly depend on porosity. The influence of porosity distribution on the compressive strength of aerated autoclaved concrete was investigated by using finite element analysis and multiaxial Weibull theory. Calculations of failure probability of microstructures with ordered as well as random pore configurations show a dependence of compressive strength on the Weibull modulus of the matrix material and the size and arrangement of pores. The results of the calculations are compared to experimental data of aerated autoclaved concrete.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 521: Symposium R – Porous & Cellular Materials for Structural Applications , 1998 , 21
Copyright
Copyright © Materials Research Society 1998

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Prim, P. and Wittmann, F.H.: Structure and Water Absorbtion of Aerated Concrete. In Autoclaved Aerated Concrete, Moisture and Properties, eds. Wittmann, F.H. Elsevier, Amsterdam, 1983, P. 55–69.Google Scholar
[2] Grundlach, H.: Dampfgehärtete Baustoffe, Bauverlag GmbH, Wiesbaden und Berlin, 1973.Google Scholar
[3] Aroni, S., Groot, G.J., Robinson, M.J., Svanholm, G. and Wittman, F.H.: Rilem Recommended Practice: Autoclaved Aerated Concrete, Properties, Testing and Design, Chapman & Hall, London, 1993.Google Scholar
[4] Batdorf, S.B. and Crose, J.G.: A Statistical Theory for the Fracture of Brittle Structures Subjected to Nonuniform Stress, Journal of Applied Mechanics 41 (1974) P. 459–461.Google Scholar
[5] Batdorf, S.B.: Fundamentals of the Statistical Theory of Fracture. In Proceedings of the International Symposium on Fracture Mechanics of Ceramics, eds. Bradt, R.C., Hasselman, D.P.H and Lange, F.F. Plemum Press New York, 1989, P. 1–30.Google Scholar
[6] Thiemeier, T., Brückner-Foit, A. and Kölker, H.: Influence of the Fracture Criterion on the Failure Prediction of Ceramics Loaded in Biaxial Flexure, Journal of the American Ceramic Society 74 (1991) P. 48–52.Google Scholar
[7] Heger, A.: Berwertung der Zuverlässigkeit mehrachsig belasteter keramischer Bauteile, Phd-thesis, University of Karlsruhe, 1993.Google Scholar
[8] Schober, G.: Effect of Size Distribution of Air Pores in AAC on Compressive Strength. In Proceedings of the 3rd Rilem International Symposium on Autoclaved Aerated Concrete, Zürich, Switzerland, eds. Wittmann, F.H. A.A. Balkema Publishers Rotterdam, 1992, P. 77–80.Google Scholar
[9] Rice, R. W. and Grace, W.R.: Evaluation and Extension of Physical Property-Porosity Models based on Minimum Solid Area, Journal of Material Science 31 (1996) P. 102–118.Google Scholar
[10] Brezny, R. and Green, D.: Mechanical Behaviour of Cellular Ceramics, In Materials Science and Technology, eds. R.W. CahnP.Haasen, E.J. Kramer, vol.11, Structure and Properties of Ceramics, volume editor: Swain, M.S., VCH Weinheim, 1994, P. 465–516.Google Scholar
[11] Balshin, Y.: Relation of Mechanical Properties of Powder Metals and their Porosity and the Ultimate Properties of Porous Metal-Ceramic Materials, Dokl. Akad. Nauk. SSSR 67 (1949) P. 831–834.Google Scholar
[12] Ryshkewitch, E.: Compression Strength of Porous Sintered Alumina and Zirconia, Journal of the American Ceramic Society 36, No.2 (1953) P. 65–68.Google Scholar
[13] Schiller, K.K.: Porosity and Strength of Brittle Solids (with Particular Reference to Gypsum). In Mechanical Properties of Non-Metalic Brittle Materials, eds. Walton, W.H. Buttenworth Sc. Publ., London, 1958, P. 35–49.Google Scholar
[14] Le Roy, G., Embury, J.D., Edwards, G. and Ashby, M.F.: A Model of Ductile Fracture Based on the Nucleation and Growth of Voids, Acta Metall. 29 (1981) P. 1509–1522.Google Scholar