Modelling the Structure of Highly Porous Materials

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Abstract

Highly porous materials are the basis for four product groups: heat insulation, sound insulation and sound absorption, as well as insulation filling. In all cases, the parameter determining the properties of these materials is porosity, which also determines the conditions for energy transfer in the material. Pore size and shape, pore size distribution and porosity, thickness, structure, and nature of inter-ring membranes are also important characteristics (determining, first and foremost, their strength. These features of the structure and their influence on the properties of materials can be considered in the implementation of structural and mathematical models. The article describes the method and results of construction of complex structural model of high porous products on the example of particularly light and heat insulating mesh concrete. Analytical expressions for compressive strength, medium density and thermal conductivity are obtained. A nomogram has been constructed, with the help of which prognostic tasks of assessment of properties of mineral products of honeycomb structure can be solved depending on their porosity and nature of the structure-forming component.

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About the authors

I. V. Bessonov

Scientific-Research Institute of Building Physics of RAACS

Author for correspondence.
Email: bessonoviv@mail.ru

Candidate of Sciences (Engineering)

Russian Federation, 21, Lokomotivniy Driveway, Moscow, 127238

A. D. Zhukov

Scientific-Research Institute of Building Physics of RAACS; National Research Moscow State University of Civil Engineering

Email: lj211@yandex.ru

Candidate of Sciences (Engineering)

Russian Federation, 21, Lokomotivniy Driveway, Moscow, 127238; 26, Yaroslavskoe Highway, Moscow, 129337

I. S. Govryakov

Scientific-Research Institute of Building Physics of RAACS; National Research Moscow State University of Civil Engineering

Email: govr190@mail.ru

Postgraduate Student

Russian Federation, 21, Lokomotivniy Driveway, Moscow, 127238; 26, Yaroslavskoe Highway, Moscow, 129337

E. A. Gorbunova

Scientific-Research Institute of Building Physics of RAACS; National Research Moscow State University of Civil Engineering

Email: eg15082000@mail.ru

Master Student

Russian Federation, 21, Lokomotivniy Driveway, Moscow, 127238; 26, Yaroslavskoe Highway, Moscow, 129337

References

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Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. Formalization of the cellular structure: a – the actual structure of aerated concrete; b – actual structure of foam concrete; c – model of cellular porosity; d – formalized structure of cellular porosity; 1 – pores (cells) in the material; 2 – interpore partitions; 3 – location of the axes of the frame (mineral matrix), corresponding to the greatest strength; 4 – location of the axes of convective flows

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3. Fig. 2. Stress state of a three-dimensional elementary element of a cellular structure. Force equilibrium diagram P; area of maximum strength O

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4. Fig. 3. Nomogram for determining the properties of cellular concrete using a universal model

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