Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Applications  > Assessing the interaction between mechanic...

Thursday, 17 October 2019
pdf
Raw materials & technologies, Applications

Assessing the interaction between mechanical and thermal properties in concrete

Thursday, 22 December 2016

Highly thermal insulated building envelopes are the base of energy efficient buildings worldwide, however, concrete show poor thermal insulation properties.

Assessing the interaction between mechanical and thermal properties in concrete for developing a structural and insulating material. Source: Uwe-Jens Kahl/pixelio.de
Assessing the interaction between mechanical and thermal properties in concrete for developing a structural and insulating material. Source: Uwe-Je...

Developing a structural and thermal insulating concrete is challenging because improving thermal properties undermines mechanical properties.

Microstructure changes reduce thermal conductivity

This study aims to understand the interactions between thermal and mechanical properties of concrete (conductivity-to-strength efficiency), when modifying the matrix and aggregate phases by adding fly ash (FA) and coarse and fine lightweight aggregates (LWAs). Based on the ratio fc/λ, the highest efficiency was given by the addition of LWAs (0.017 [W/mK]/MPa) in comparison with the addition of FA (0.008 [W/mK]/MPa). Nevertheless, those efficiencies are highly dependent on the interaction between the aggregate and matrix phases. The optimisation of one phase only is not enough to obtain a structural insulating concrete because the thermal conductivity-to-strength efficiency is governed by both, the aggregate and the matrix.

The study is published in: Construction and Building Materials, Volume 132, 1 February 2017, Pages 353–364

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register