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Quantification of Localized Fracture Mechanism of Recycled Aggregate Concrete in Compression using Acoustic Emission Technique  

Kim, Sun-Woo (충남대학교 건축공학과)
Yun, Hyun-Do (충남대학교 건축공학과)
Kim, Yun-Su (충남대학교 건축공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.11, no.6, 2007 , pp. 87-94 More about this Journal
Abstract
Reuse of recycled aggregate from demolished concrete structure is beneficial and necessary from the viewpoint of environmental preservation and effective utilization of resources. The most important mechanical properties of recycled aggregate concrete (RAC) are the compressive strength, the tensile and the flexural strengths, the bond strength and the elastic modulus of such concrete. In particular, the stress-strain relation and fracture process of RAC in compression is especially important in theoretical and numerical analysis as well as engineering design of RAC structures. In this paper, to clarify the characteristics of fracture process in RAC, acoustic emission(AE) method is applied to detect micro-cracking in concrete under compression. From AE parameters, it is found that cracking and fracture behaviors in recycled aggregate concrete fairly differ from that of normal and recycled sand concrete.
Keywords
Recycled aggregate concrete; Compression; Fracture process; Acoustic emission;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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