Monitoring of Freeze-Thaw Cycles in Concrete Using Embedded Sensors and Ultrasonic Imaging
| Autor: | M. Molero, Héctor Romero, Sofía Aparicio, Javier Ranz, Margarita González, M.J. Casati |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Engineering
Acoustics Ultrasonic transmission lcsh:Chemical technology freeze-thaw cycles monitoring concrete embedded sensors ultrasound Biochemistry Article Analytical Chemistry Ultrasonic velocity lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation business.industry Attenuation Ultrasound Continuous monitoring Electrical engineering Porosimetry Atomic and Molecular Physics and Optics Ultrasonic imaging Types of concrete business |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 14, Iss 2, Pp 2280-2304 (2014) Sensors; Volume 14; Issue 2; Pages: 2280-2304 |
| ISSN: | 1424-8220 |
| Popis: | This paper deals with the study of damage produced during freeze-thaw (F-T) cycles using two non-destructive measurement approaches—the first approach devoted to continuous monitoring using embedded sensors during the cycles, and the second one, performing ultrasonic imaging before and after the cycles. Both methodologies have been tested in two different types of concrete specimens, with and without air-entraining agents. Using the first measurement approach, the size and distribution of pores were estimated using a thermoporometrical model and continuous measurements of temperature and ultrasonic velocity along cycles. These estimates have been compared with the results obtained using mercury porosimetry testing. In the second approach, the damage due to F-T cycles has been evaluated by automated ultrasonic transmission and pulse-echo inspections made before and after the cycles. With these inspections the variations in the dimensions, velocity and attenuation caused by the accelerated F-T cycles were determined. |
| Databáze: | OpenAIRE |
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