• The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: The Effects of Anisotropic Insulations with Different Spatial Distributions on Material Properties of Mortar Specimens

Author(s): Sang-Yeop Chung, Mohamed Abd Elrahman, and Dietmar Stephan

Publication: IJCSM

Volume: 11

Issue: 4

Appears on pages(s): 573–584

Keywords: insulating concrete, anisotropic insulation, X-ray CT, probability function, thermal conductivity, compressive strength.

DOI: 10.1007/s40069-017-0218-3

Date: 12/30/2017

Insulating concrete is a material designed to reduce heat conduction with pores/insulations, and these pores strongly affect the material characteristics. In general, the insulation effect is directly proportion to the pore volume, while the material strength decreases as the porosity increases. To overcome this contrary, anisotropic insulations with different spatial distributions are proposed and investigated in this study. A set of mortar specimens with different arrangements of coin-shaped insulations are produced to examine the anisotropic insulation effect on the material characteristics. In addition, different types of insulation materials and their effect on the materials are also investigated here. X-ray computed tomography images and probabilistic description methods are used to confirm the arrangement of the insulations. The thermal and mechanical responses for different directions are investigated using both experimental and numerical methods. From the results, it is demonstrated that the use of anisotropic insulations for a specific direction can enhance the insulation efficiently as well as minimizing the loss of compressive strength.