Efficient separation of coarse aggregates and cement mortar in the recycled concrete by water jet demolition

被引：4
|
作者：
Wang, Zefeng [1 ,2 ]
Pan, Chao [1 ]
Jiang, Yutao [1 ]
Zhong, Jinwen [1 ]
Zhu, Jiaying [1 ]
机构：
[1] Wuhan Univ Sci & Technol, Sch Urban Construct, Wuhan 430065, Peoples R China
[2] Wuhan Univ Sci & Technol, Inst High Performance Engn Struct, Wuhan 430065, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 333卷
基金：
国家重点研发计划;
关键词：
Interfaces; Deformation and fracture; Separation; Coarse aggregates; The recycled concrete; CONSTRUCTION; WASTE; DESIGN;
D O I：
10.1016/j.matlet.2022.133623
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The disposal of construction wastes have become the current focus worldwide towards the sustainable devel-opment. The adhesion of the cement mortar onto the aggregates significantly impedes the properties of the recycled aggregate concrete. Towards improving the recyclability of construction wastes, this work presents a novel demolition technology using high-pressure abrasive water jet (HAWJ). The results showed that the micro -cracks on the fracture surfaces of the recycled concrete after HAWJ demolition mainly developed along the interfaces between the aggregates and the cement, thus resulting in the efficient separation of the coarse ag-gregates. The residual compressive strength of the recycled concrete could retain 71% after HAWJ demolition, demonstrating that the effect of HAWJ demolition was negligible. Therefore, it is reasonable to conclude that HAWJ demolition is a promising strategy to recycle the old buildings.
引用
收藏
页数：5
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