Porous structure of lime-based mortars studied by mercury intrusion porosimetry and nuclear magnetic resonance

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00464440" target="_blank" >RIV/68378297:_____/16:00464440 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Porous structure of lime-based mortars studied by mercury intrusion porosimetry and nuclear magnetic resonance

Original language description

Moisture migration in porous materials is one of the main causes of building degradation. Therefore, the assessment of the properties connected with the movement of water is essential to evaluate the durability of materials. This study focuses on the characterization of the porous structure of lime-based mortars by mercury intrusion porosimetry (MIP) and nuclear magnetic resonance (NMR).MIP is one of the most used techniques in building materials research for determining the pore size distribution. However, the calculation of the pore size distribution from MIP data results in systematic deviations from reality, as it reflects the physics of how mercury intrudes into the material and is not controlled by the actual sizes of the pores present [1]. NMR is a nondestructive technique that can be used to determine accurately the pore water distribution by measuring the relaxation behavior of the NMR signal from a water saturated specimen [2]. In this analyze two lime-based mortars and correlate its pore size distribution obtained with MIP with the pore water distribution measured with a specially designed NMR apparatus [3]. Furthermore, we analyze the moisture migration directly by measuring the dynamic moisture transport during drying. The NMR technique enabled distinguishing different pore geometries with the same entrance size at a defined position in the specimen.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

AL - Art, architecture, cultural heritage

OECD FORD branch

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Project

<a href="/en/project/LO1219" target="_blank" >LO1219: Sustainable advanced development of CET</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů