Upcycling of construction and demolition waste: Recovery and reuse of binder and fine aggregate in cement applications to achieve circular economy

被引：0
作者：
Malladi, Ravi Chandra [1 ]
Ajayan, S. Aswathy [1 ]
Chandran, Gayathri [1 ]
Selvaraj, Thirumalini [2 ,3 ]
机构：
[1] Vellore Inst Technol, Sch Civil Engn, Vellore 632014, India
[2] Vellore Inst Technol, CO2 Res & Green Technol Ctr, Vellore 632014, India
[3] Lublin Univ Technol, Ulam NAWA, PL-20618 Lublin, Poland
来源：
CLEANER ENGINEERING AND TECHNOLOGY | 2025年 / 24卷
关键词：
Construction and demolition waste; Dehydroxylation; Acid dissolution; Cement chemistry; Circular economy; CONCRETE;
D O I：
10.1016/j.clet.2024.100864
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The effective recycling and utilization of construction and demolition (C&D) waste to its maximum capacity to achieve a circular economy model is challenging in the current scenario. This current research emphasizes upcycling C&D waste using an acid dissolution method to separate the binder and aggregate fractions, and their performance was evaluated in cement mortar mixtures. The results showed that replacing 20% of cement with the recovered binder improved compressive strength by 8.07%, enhanced hydration product formation, and decreased water absorption and porosity by 11.48% and 5.21%, respectively. Replacing natural sand with recycled aggregates also resulted in comparable strength gains compared to reference mortars. The complete utilization of the secondary products from the upcycled C&D waste in construction activities helps to achieve sustainable development goals by reducing the carbon footprint and contributing to a circular economy model.
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页数：12
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