Developing advanced techniques to reclaim existing end of service life (EoSL) bricks - An assessment of reuse technical viability
Developing advanced techniques to reclaim existing end of service life (EoSL) bricks - An assessment of reuse technical viability
复制标题
开发先进技术来回收现有的使用寿命结束 (EoSL) 砖 - 评估再利用技术可行性
DOI：
10.1016/j.dibe.2020.100006
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发表时间：
2020
影响因子：
8.2
通讯作者：
Zhou K
中科院分区：
文献类型：
--
作者：
Zhou K
结构砖是高度耐用的建筑产品。然而，砖墙大多在其技术使用寿命结束之前就被拆除了；大多数被压碎形成骨料或填埋。城市采矿和循环经济激发了人们对从使用寿命结束的建筑物中回收结构产品以直接再利用的潜力的兴趣。对于砌砖，将砖与水泥基砂浆（而不是石灰基砂浆）分开，而不损坏砖是一个主要的障碍。介绍了锯切法和冲孔法两种先进技术，论证了砖石回收的技术可行性。与新砖相比，再生砖具有相似的视觉外观，其抗压强度相差- 4.8%至+40%。现行规范中砌体抗压强度设计公式可适用于再生砖。与新砖相比，该回收工艺实现了95%以上的回收率，能耗和碳需求显著降低（<1%）。
Structural bricks are highly durable building products. However, brickwork is mostly demolished long before the end of its technical service life; the majority are crushed to form aggregate or else landfilled. Urban mining and circular economy are stimulating interest in the potential to recover structural products from end-of-service-life buildings for direct reuse. For brickwork, separating bricks from cement-based mortar, as opposed to lime-based mortar, without damage to bricks is a major barrier. This paper presents two advanced techniques based on saw-cutting and punching, to demonstrate the technical feasibility of brick reclamation. Compared to new bricks, reclaimed bricks have similar visual appearance and their compressive strength differs by −4.8% to +40%. Design formula for compressive strength of masonry in current codes can be applied to reclaimed bricks. The reclamation process achieves reclaim rate of over 95% and has significantly lower energy consumption, and carbon requirements (<1%) relative to new bricks.