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Keywords |
순환골재 콘크리트 ; 압축 ; 파괴진행 ; 음향방출 ; Recycled aggregate concrete ; Compression ; Fracture process ; Acoustic emission |
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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.
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