废弃混凝土再生微粉的基本问题及应用

Translated title of the contribution: Fundamental Problems and Applications of Recycled Fine Powder Derived from Waste Concrete

Jianzhuang Xiao, Taohua Ye, Tongbo Sui, Chi Sun Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Resourcing of waste concrete and its application as recycled aggregates have made significant progress. However,research on recycled fine powder derived from waste concrete is still limited. Therefore,this paper focuses on the preparation,characterization,and modification of recycled fine powder,clarifies the mechanisms for its fundamental problems such as high component discreteness (i. e.,the number of mineral phase species)and low activity index,and proposes a novel solution,that is,the introduction of particle shaping and strong magnetic separation technologies into the preparation process of recycled fine powder,followed by carbonation modification. It is expected that the above-mentioned problems can be addressed by taking carbonated recycled fine powder with ultra-high paste content as the outlet. Furthermore,low-carbon application scenarios of recycled fine powder are discussed,including Portland-recycled fine powder cement,3D-printed recycled mortar,and fully recycled concrete. Further research and value-added use of recycled fine powder are known to be significant for the improvement in resourcing ratio of waste concrete as well as for the green and low-carbon development in building industry.

Translated title of the contributionFundamental Problems and Applications of Recycled Fine Powder Derived from Waste Concrete
Original languageChinese (Simplified)
Article number22120116
JournalCailiao Daobao/Materials Reports
Volume37
Issue number10
DOIs
Publication statusPublished - 25 May 2023

Keywords

  • component characterization
  • low-carbon application
  • modification
  • recycled fine powder
  • waste concrete

ASJC Scopus subject areas

  • General Materials Science

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