Monitoring of Freeze-Thaw Cycles in Concrete Using Embedded Sensors and Ultrasonic Imaging

Sensors

Javier Ranz³  Sof໚ Aparicio³  Hຜtor Romero²  Mar໚ Jesús Casati¹  Miguel Molero³ 

[1] Departamento de Vehículos Aeroespaciales, E.U.I.T. Aeronáutica, U.P.M. 28040, Madrid, Spain; E-Mail:;Departamento de Ingeniería Civil: Construcción, E.T.S.I.C.C.P., U.P.M. 28040, Madrid, Spain; E-Mail:;Instituto de Tecnologías Físicas y de la Información “Leonardo Torres Quevedo”, ITEFI (CSIC), 28006, Madrid, Spain; E-Mails:

关键词: freeze-thaw cycles;    monitoring;    concrete;    embedded sensors;    ultrasound;   

DOI  :  10.3390/s140202280

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.