Reclaiming structural steels from the end of service life composite structures for reuse - An assessment of the viability of different methods
Reclaiming structural steels from the end of service life composite structures for reuse - An assessment of the viability of different methods
复制标题
从使用寿命结束的复合结构中回收结构钢以供再利用 - 不同方法的可行性评估
DOI：
10.1016/j.dibe.2022.100077
复制
发表时间：
2022
影响因子：
8.2
通讯作者：
Chen H
中科院分区：
文献类型：
--
作者：
Chen H
在复合梁中将结构钢截面与混凝土板分离而不损坏的能力形成了复合结构回收和直接再利用而不是回收的关键技术挑战。本文解决了这一技术挑战。它提出了一个可行性研究的结果，使用各种潜在的技术，包括激光切割，带锯切割，线锯和墙锯切割，金刚石钻芯，切割焊接剪力连接件在传统的钢-混凝土组合梁与钢板垂直的钢截面。最可行的回收方法被认为是线锯和墙锯切割。回收后的钢截面，钢拉伸试样进行了测试，回收的钢截面和它们的力学性能进行了比较，在组合梁中使用的原始钢。试样试验结果表明，原始钢和再生钢的性能相同。还记录了不同回收方法的能源使用，以计算碳排放量，并发现其比制造原始钢或回收钢低几个数量级。
The ability to separate structural steel sections from concrete slabs in composite beams without damage forms a key technical challenge for reclaim and direct re-use of composite structures as opposed to recycling. This paper addresses this technical challenge. It presents the results of a feasibility study using a variety of potential techniques, including laser cutting, band-saw cutting, wire-saw and wall-saw cutting, and diamond core drilling, to cut welded shear connectors in conventional steel-concrete composite beams with the steel sheeting perpendicular to the steel section. The most feasible reclaiming method was found to be wire-saw and wall-saw cutting. After reclaiming steel sections, steel tensile coupon tests were carried out on the recovered steel sections and their mechanical properties were compared to those of the original steel used in the composite beams. The coupon test results showed identical behaviour of the original and reclaimed steels. The energy use of the different methods of reclaiming was also recorded to calculate carbon emission and was found to be several orders of magnitude lower than manufacturing virgin steel or recycling steel.