Industrial graphene oxide-fly ash hybrid for high-performance cemented waste rock backfill

Yuan Gao, Hao Sui, Zixuan Yu, Jiangyu Wu, Weiqiang Chen, Hongwen Jing, Minjie Ding, Yanming Liu

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

Cemented waste rock backfills (CWRB) play an essential role in mining safety engineering, waste reduction and harm resource recycling. However, the mechanical and permeability-related properties of the CWRB are limited by cement consumption and cost. This study adopted the industrial graphene oxide-fly ash (IGO-FA) hybrid to produce high-performance, cost-saving, and environment-friendly mine backfill materials. The IGO-FA hybrid exhibited the optimal reinforcing efficiency under a 0.5 water-to-cement ratio, where the CWRBs’ mechanical properties and impermeability were enhanced by 5.1%-16.9% and 32.7%-38.9%, respectively, with only 0.007 wt% IGO dosage. Compared with the traditional backfill materials, cement consumption can be reduced by up to 20 wt%. This work not only enhanced the understanding of GO in reinforcing cementitious composites but could also provide an affordable alternative to GO-related composites.

Original languageEnglish
Article number129484
Number of pages14
JournalConstruction and Building Materials
Volume359
DOIs
Publication statusPublished - 12 Dec 2022

Keywords

  • Affordable graphene oxide
  • Backfill materials
  • Industrial graphene oxide
  • Microstructure
  • Nano-modification

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