Journal article
Measuring Freeze and Thaw Damage in Mortars Containing Deicing Salt Using a Low-Temperature Longitudinal Guarded Comparative Calorimeter and Acoustic Emission
Advances in civil engineering materials, v 3(1), pp 316-337
31 Dec 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Deicing salts are often applied to the surface of pavements and bridge decks in the winter to melt ice, thereby improving safety for the traveling public. In this paper, the influence of NaCl deicing salt on freezing and thawing temperatures of pore solution and corresponding damage of mortar specimens were investigated. A low-temperature longitudinal guarded comparative calorimeter (LGCC) was developed to cool down a mortar sample at a rate of 2 degrees C/h and to re-heat the mortar at a rate of 4 degrees C/h. Heat flux during freezing and thawing cycles was monitored, and the temperatures at which freezing and thawing events occurred were detected. During cooling and heating, acoustic emission (AE) activity was measured to quantify the damage (cracking) caused by aggregate/paste thermal mismatch and/or phase changes. The results show that NaCl solution in a mortar sample freezes at a lower temperature than the value expected from its bulk phase diagram because of under-cooling. Conversely, the frozen solution in mortar melts at the same melting temperature as the bulk frozen NaCl solution. As the salt concentration increases, the freezing temperature is lowered. For samples
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Details
- Title
- Measuring Freeze and Thaw Damage in Mortars Containing Deicing Salt Using a Low-Temperature Longitudinal Guarded Comparative Calorimeter and Acoustic Emission
- Creators
- Yaghoob Farnam - Purdue University West LafayetteDale Bentz - National Institute of Standards and TechnologyAaron Sakulich - Worcester Polytechnic InstituteDaniel Flynn - National Institute of Standards and TechnologyJason Weiss - Purdue University West Lafayette
- Publication Details
- Advances in civil engineering materials, v 3(1), pp 316-337
- Publisher
- Amer Soc Testing Materials
- Number of pages
- 22
- Grant note
- Joint Transportation Research Program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000408805800020
- Scopus ID
- 2-s2.0-84925448380
- Other Identifier
- 991020836355904721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary