Development of muon scattering tomography for a detection of reinforcement in concrete
Development of muon scattering tomography for a detection of reinforcement in concrete
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DOI：
10.1088/2631-8695/ac21a8
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发表时间：
2021-03
影响因子：
1.7
通讯作者：
M. Dobrowolska;J. Velthuis;A. Kopp;C. De Sio;R. Milne;P. Pearson
中科院分区：
文献类型：
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作者：
M. Dobrowolska;J. Velthuis;A. Kopp;C. De Sio;R. Milne;P. Pearson
对老化的钢筋混凝土结构进行检测是一项全球性的挑战。现有的非破坏性评估技术在土木和结构工程中具有有限的穿透深度，并且不允许精确地确定大型混凝土对象内的钢筋的配置。关键基础设施（桥梁、水坝、干船坞、核生物防护罩等）面临的巨大挑战是了解混凝土和钢筋的内部情况，而不仅仅是钢筋的位置。在大多数新建筑中，位置应该是已知的，并记录在竣工图中，由于旧结构的记录不好，这些可能不存在。μ子散射层析成像技术是一种无损、非侵入性的技术，在高深度三维混凝土成像方面显示出巨大的应用前景。以前，我们已经证明，直径为33.7 ± 7.3毫米的个别酒吧可以使用μ子散射断层扫描定位。在这里，我们提出了一种改进的方法，利用杆结构的周期性。通过这种新方法，可以检测和成像厚度低至6 mm的钢筋。
Inspection of ageing, reinforced concrete structures is a world-wide challenge. Existing non-destructive evaluation techniques in civil and structural engineering have limited penetration depth and don’t allow to precisely ascertain the configuration of reinforcement within large concrete objects. The big challenge for critical infrastructure (bridges, dams, dry docks, nuclear bioshields etc.) is understanding the internal condition of the concrete and steel, not just the location of the reinforcement. In most new constructions the location should be known and recorded in the as-built drawings, where these might not exist due to poor record keeping for older structures. Muon scattering tomography is a non-destructive and non-invasive technique which shows great promise for high-depth 3D concrete imaging. Previously, we have demonstrated that individual bars with a diameter of 33.7 ± 7.3 mm can be located using muon scattering tomography. Here we present an improved method that exploits the periodicity of bar structures. With this new method, reinforcement with bars down to 6 mm thickness can be detected and imaged.