Special Section on Structural Health Monitoring: Use of Guided Waves and/or Nonlinear Acoustic Techniques

Effect of carbonation on the linear and nonlinear dynamic properties of cement-based materials

[+] Author Affiliations
Jesus N. Eiras, José Monzó, María V. Borrachero, Jordi Payá

Universitat Politècnica de València, Instituto de Ciencia y Tecnología del Hormigón, Camino Vera s/n, València 46022, Spain

Tribikram Kundu

University of Arizona, Department of Civil Engineering and Engineering Mechanics, Tucson, Arizona 85719, United States

John S. Popovics

The University of Illinois, Civil and Environmental Engineering, 205 North Mathews Street, Urbana, Illinois 61801, United States

Opt. Eng. 55(1), 011004 (Aug 19, 2015). doi:10.1117/1.OE.55.1.011004
History: Received June 1, 2015; Accepted July 21, 2015
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Abstract.  Carbonation causes a physicochemical alteration of cement-based materials, leading to a decrease of porosity and an increase of material hardness and strength. However, carbonation will decrease the pH of the internal pore water solution, which may depassivate the internal reinforcing steel, giving rise to structural durability concerns. Therefore, the proper selection of materials informed by parameters sensitive to the carbonation process is crucial to ensure the durability of concrete structures. The authors investigate the feasibility of using linear and nonlinear dynamic vibration response data to monitor the progression of the carbonation process in cement-based materials. Mortar samples with dimensions of 40×40×160mm were subjected to an accelerated carbonation process through a carbonation chamber with 55% relative humidity and >95% of CO2 atmosphere. The progress of carbonation in the material was monitored using data obtained with the test setup of the standard resonant frequency test (ASTM C215-14), from a pristine state until an almost fully carbonated state. Linear dynamic modulus, quality factor, and a material nonlinear response, evaluated through the upward resonant frequency shift during the signal ring-down, were investigated. The compressive strength and the depth of carbonation were also measured. Carbonation resulted in a modest increase in the dynamic modulus, but a substantive increase in the quality factor (inverse attenuation) and a decrease in the material nonlinearity parameter. The combined measurement of the vibration quality factor and nonlinear parameter shows potential as a sensitive measure of material changes brought about by carbonation.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jesus N. Eiras ; Tribikram Kundu ; John S. Popovics ; José Monzó ; María V. Borrachero, et al.
"Effect of carbonation on the linear and nonlinear dynamic properties of cement-based materials", Opt. Eng. 55(1), 011004 (Aug 19, 2015). ; http://dx.doi.org/10.1117/1.OE.55.1.011004


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