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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fracture behavior of recycled aggregate concrete under three-point bending
Abstract The fracture behavior of pre-cracked three-point bending specimens with different recycled coarse aggregate (RCA) replacement ratios was studied. The deformation characteristics of specimens during the fracture process were analyzed by the digital image correlation (DIC) technique, and then the cracking morphology was observed and discussed. In case of similar strength, the fracture toughness of recycled aggregate concrete (RAC) is similar to conventional concrete, but the fracture energy is lower. With the increase of RCA replacement ratios, the fracture energy decreases. The replacement ratio of RCA results in more discrete in the shape of the softening curve, and the concave features are more pronounced. By DIC analysis, deformation characteristics of the specimen are bifurcated into three stages during the fracture process. With the reduction of load to 80%, the specimen showed a rotation around a center point. At a low RCA replacement ratio, there is spalling at the pre-crack tip, and the crack is less smooth relative to the higher RCA replacement ratio.
Fracture behavior of recycled aggregate concrete under three-point bending
Abstract The fracture behavior of pre-cracked three-point bending specimens with different recycled coarse aggregate (RCA) replacement ratios was studied. The deformation characteristics of specimens during the fracture process were analyzed by the digital image correlation (DIC) technique, and then the cracking morphology was observed and discussed. In case of similar strength, the fracture toughness of recycled aggregate concrete (RAC) is similar to conventional concrete, but the fracture energy is lower. With the increase of RCA replacement ratios, the fracture energy decreases. The replacement ratio of RCA results in more discrete in the shape of the softening curve, and the concave features are more pronounced. By DIC analysis, deformation characteristics of the specimen are bifurcated into three stages during the fracture process. With the reduction of load to 80%, the specimen showed a rotation around a center point. At a low RCA replacement ratio, there is spalling at the pre-crack tip, and the crack is less smooth relative to the higher RCA replacement ratio.
Fracture behavior of recycled aggregate concrete under three-point bending
Li, Tan (Autor:in) / Xiao, Jianzhuang (Autor:in) / Zhang, Yamei (Autor:in) / Chen, Baochun (Autor:in)
20.06.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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