Moisture transport in concrete during fire as studied by NMR

L. Pel, G.H.A. Heijden, van der, K. Kopinga

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademic

Abstract

NMR imaging of moisture in concrete is a valuable tool for monitoring changes in the moisture content of concrete, e.g., during drying, dehydration, and heating. It can be a useful tool in assessing the consequences of certain environmental conditions non-destructively. We present combined moisture content and temperature profiles of one-sided heated concrete samples measured with our dedicated NMR setup. The concrete sample was equilibrated at a moisture content of 97 % RH. The moisture content can be measured quantitatively and nondestructively while heating up the sample one sided to 500°C. We present the first experimental proof for the built up of a moisture peak in concrete, and the formation of a saturated layer. The temperatures meausured at the boiling front indicate a vapour pressure in the order of 1.8 MPa. A simple vapour transport model was successfully used to describe the speed of the boiling front.
Original languageEnglish
Title of host publication2nd International Conference on Microstructural-Related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, The Netherlands
EditorsYe Guang, K. Breugel, van, Wei Sun, Changwen Miao
Pages235-242
Publication statusPublished - 2012
Eventconference; 2nd International Conference on Microstructural-related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, The Netherlands; 2012-04-11; 2012-04-13 -
Duration: 11 Apr 201213 Apr 2012

Publication series

NameRILEM Proceedings
VolumePro 83

Conference

Conferenceconference; 2nd International Conference on Microstructural-related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, The Netherlands; 2012-04-11; 2012-04-13
Period11/04/1213/04/12
Other2nd International Conference on Microstructural-related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, The Netherlands

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  • Cite this

    Pel, L., Heijden, van der, G. H. A., & Kopinga, K. (2012). Moisture transport in concrete during fire as studied by NMR. In Y. Guang, K. Breugel, van, W. Sun, & C. Miao (Eds.), 2nd International Conference on Microstructural-Related Durability of Cementitious Composites, 11-13 April 2012, Amsterdam, The Netherlands (pp. 235-242). (RILEM Proceedings; Vol. Pro 83).