Effect of porosity on the thermal expansion coefficient: A discussion on the paper ‘Effects of mineral admixtures on the thermal expansion properties of hardened cement paste' by Z.H. Shui, R. Zhang, W. Chen, D. Xuan, Constr. Build. Mater. 24(9) (2010) 1761–1767

Siavash Ghabezloo (1)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)

A discussion is presented on the effect of porosity change on the thermal expansion coefficient of porous materials. It is shown that both drained and undrained thermal expansion coefficients normally increase with porosity increase. Consequently the reduction of the thermal expansion coefficient with the porosity increase, as obtained in the experimental results of Shui et al. (Constr. Build. Mater. (2010), 24(9), 1761-1767), can not be considered as a general trend for the behaviour of porous materials.

Mots clés: Porosity; Thermal expansion coefficient; Porous material

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Siavash Ghabezloo. Effect of porosity on the thermal expansion coefficient: A discussion on the paper ‘Effects of mineral admixtures on the thermal expansion properties of hardened cement paste' by Z.H. Shui, R. Zhang, W. Chen, D. Xuan, Constr. Build. Mater. 24(9) (2010) 1761–1767. Construction and Building Materials, 2010, 24 (9), pp.1796-1798. ⟨10.1016/j.conbuildmat.2010.03.006⟩. ⟨hal-00495092⟩