Influence of the heterogeneity of reinforced concrete on its grinding process by impregnated diamond cutter-猫眼课题宝

DOI：

10.1016/j.wear.2021.204117

发表时间：

2021-12

期刊：

Wear

影响因子：

通讯作者：

中科院分区：

工程技术1区

文献类型：

作者：

Hengchao Shi;Songcheng Tan;L. Duan;Jianan Zhang;Xiaohong Fang

金刚石工具在钢筋混凝土结构的施工和拆除中得到了广泛的应用，但金刚石工具与钢筋混凝土构件之间的相互作用研究较少。为研究非均匀性对金刚石刀具磨削钢筋混凝土的影响，分别以花岗岩、钢筋和橡胶为增强材料，制备了钢筋混凝土试件，并采用孕镶金刚石刀具进行了磨削试验。采用激光扫描共聚焦显微镜对RC试样的磨削性能进行了测试，采用扫描电子显微镜对磨屑和磨损表面进行了观察。试验结果表明，水泥和水泥基材料的物理力学性质不同，其粉磨深度和磨屑也不同，水泥基材料的非均匀性会导致IDC的跳动或前倾，从而改变粉磨过程的恒定状态。四种材料的磨削深度从大到小依次为钢筋、花岗岩、水泥和橡胶。另外，磨屑对IDC基体的磨损也起着重要作用，IDC基体的磨损机制主要是磨粒磨损，即硬磨屑引起的微切削和软磨屑引起的磨削。

Diamond tools have been wildly used in the construction and demolition of reinforced concrete (RC) structures, though the interaction between diamond tools and RC components is seldom studied. To find out the influence of heterogeneity on the grinding of RC by diamond cutter, RC samples with granite, rebar and rubber as reinforced material (RM) respectively and impregnated diamond cutters (IDCs) were prepared to carry out grinding tests. The grinding characteristics of RC samples were measured by a laser scanning confocal microscopy, while the morphologies of grinding debris and wear surfaces of IDCs were observed by SEM. Test results indicate that the grinding depths and grinding debris of cement and RMs are different from each other due to their distinct physical and mechanical properties, and the heterogeneity of RC samples will cause IDC to bounce or lean forward, changing the grinding process from a constant status. Ranked in descending order, the grinding depths of the four materials are rebar, granite, cement and rubber. Additionally, grinding debris plays an important role on the wear of IDC, and the main wear mechanism of IDC matrix is abrasive wear, namely, micro-cutting and grinding caused by hard debris, re-ground brittle debris and soft debris respectively.

Influence of the heterogeneity of reinforced concrete on its grinding process by impregnated diamond cutter

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