Evaluation of cracking damage in freeze-thawed concrete using acoustic emission and X-ray CT image. (1st April 2017)

• Record Type: Journal Article
• Authors: Suzuki, Tetsuya; Shiotani, Tomoki; Ohtsu, Masayasu
• Is Part Of: Construction & building materials. Volume 136(2017)
• Page Start: 619
• Page End: 626
• Publication Date: 2017-04-01
• Subjects: Acoustic emission -- X-ray computed tomography -- Concrete damage -- P-wave velocity; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2016.09.013
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: To assess the damage of concrete structure subjected to freeze-thawed effects. A method to monitor AE activity of core samples under uniaxial compressive loading was investigated. The degree of damage was visualized using X-ray CT images. Quantification of concrete damage was analyzed relation between AE parameter and spatial statistics of cracks. Abstract: The durability of concrete structures decreases easily due to such environmental effects. For effective maintenance of concrete structures, it is necessary to evaluate not only the values of mechanical properties but also the degree of damage. In this study, damage estimation of concrete is proposed to be performed, applying AE and X-ray CT. Testing concrete core samples were taken from reinforced concrete columns of an existing canal, which is strongly affected by freeze and thawed process. Thus, a relation between AE and X-ray CT parameters is correlated, and the damage of concrete is quantitatively estimated using AE and X-ray CT.