eprintid: 10145967 rev_number: 12 eprint_status: archive userid: 699 dir: disk0/10/14/59/67 datestamp: 2022-03-30 14:38:57 lastmod: 2023-04-13 10:49:47 status_changed: 2022-03-30 14:38:57 type: article metadata_visibility: show sword_depositor: 699 creators_name: Zeng, Qiang creators_name: Jike, Nidu creators_name: Xu, Chengji creators_name: Yang, Rijiao creators_name: Peng, Yu creators_name: Wang, Jiyang creators_name: Gong, Fuyuan creators_name: Zhang, Mingzhong creators_name: Zhao, Yuxi title: Total recycling of low-quality urban-fringe construction and demolition waste towards the development of sustainable cement-free pervious concrete: The proof of concept ispublished: pub divisions: C05 divisions: F44 divisions: B04 divisions: UCL keywords: Recycling, Pervious concrete, Strength, CO2 emissions, Microstructure note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher's terms and conditions. abstract: This work presents a proof-of-concept study of recycling low-quality urban-fringe construction and demolition waste for the development of sustainable cement-free pervious concrete. Waste was in-situ collected from a local construction site of urban-fringe in Hangzhou, China, and elaborately analyzed for quality assessment. Ground brick powder was activated by alkali activators at different (Al+Si)/Na ratios to find the optimal mix ratio. Macro waste solids and alkali-activated recycled brick powder were used as the aggregate and binding material, respectively, to achieve total recycling of the waste. The effects of binder-to-aggregate ratio on the engineering performances and multi-scale structures of the cement-free recycled waste pervious concrete were explored. Results showed that the optimized alkali-activated recycled brick powder paste had high compressive strength up to 50 MPa. The cement-free recycled waste previous concrete showed relatively low compressive strength but high water permeability. Microstructural mechanisms in the aspects of pores, skeletons, and matrix-aggregate interactions were discussed. The replacement of cement by alkali-activated brick powder showed substantial economic and environmental benefits. The findings of this work would provide a promising route towards solving the large-scale construction and demolition waste in China. date: 2022-06-10 date_type: published publisher: Elsevier BV official_url: https://doi.org/10.1016/j.jclepro.2022.131464 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 1946655 doi: 10.1016/j.jclepro.2022.131464 lyricists_name: Zhang, Mingzhong lyricists_id: MZHAA72 actors_name: Zhang, Mingzhong actors_id: MZHAA72 actors_role: owner full_text_status: public publication: Journal of Cleaner Production volume: 352 article_number: 131464 citation: Zeng, Qiang; Jike, Nidu; Xu, Chengji; Yang, Rijiao; Peng, Yu; Wang, Jiyang; Gong, Fuyuan; ... Zhao, Yuxi; + view all <#> Zeng, Qiang; Jike, Nidu; Xu, Chengji; Yang, Rijiao; Peng, Yu; Wang, Jiyang; Gong, Fuyuan; Zhang, Mingzhong; Zhao, Yuxi; - view fewer <#> (2022) Total recycling of low-quality urban-fringe construction and demolition waste towards the development of sustainable cement-free pervious concrete: The proof of concept. Journal of Cleaner Production , 352 , Article 131464. 10.1016/j.jclepro.2022.131464 <https://doi.org/10.1016/j.jclepro.2022.131464>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10145967/1/Manuscript.pdf