Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Production and testing  > Characterising the pores of concrete with...

Tuesday, 17 September 2019
pdf
Raw materials & technologies, Production and testing

Characterising the pores of concrete with water vapor

Thursday, 24 July 2014

Drying techniques influence water sorption of cement-based materials

DVS-measurements support the characterisation of texture and soprtion properties of cement

Source: Schütz GmbH

DVS-measurements support the characterisation of texture and soprtion properties of cement

Source: Schütz GmbH

Dynamic water vapour sorption (DVS) may be used to characterise the pore structure of cementitious materials, but the technique is difficult to interpret.The removal of interlayer water or chemically bound water can cause a restructuration of the C-S-H.

Changes are minimised with vacuum-drying

In a paper, Belgian researchers performed DVS measurements to characterise the changes induced by different drying techniques in the textural and sorption properties of the material, while they used thermogravimetric analysis to elucidate carbonation. The ideal drying technique, which can preserve the microstructure and can remove only the non-bound water, does unfortunately not exist. All drying techniques separately affect the microstructure to some extent. However, these changes are minimised when using vacuum-drying and the solvent-exchange-method with isopropanol as drying techniques.

The study is published in: Cement and Concrete Research, Volume 64, October 2014, Pages 54-62.

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register