The development of sustainable cement pastes enhanced by the synergistic effects of glass powder and carbonation curing

Hanxiong Lyu, Lucen Hao, Long Li, Shipeng Zhang, Chi Sun Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

Due to the dilution-induced early-age strength reduction, the glass powder (GP) dosage used in concrete to replace ordinary Portland cement (OPC) is restricted. This study used carbonation curing on GP blended cement pastes to overcome this obstacle. The experimental investigations concluded that mutual improvements could be achieved, where, in comparison to the carbonated OPC batch, not only the compressive strength of 20% GP-incorporated batches was higher for both early-age (increment of 13.4%, 1-day strength of 55.4 MPa) and late-age (increment of 11.2%, 28 days strength of 62.4 MPa), but the carbon sequestration degree was also promoted. According to the characterizations of mineralogy, microstructure, and phase evolution of the blended cement paste subjecting to carbonation curing, the addition of 20% GP induced a higher carbonation degree, smaller calcite crystal size, refined pore structure, and reduced porosity than that of pure OPC control references. The sustainability assessments confirmed that carbonated GP blended cement is a cleaner alternative to OPC.

Original languageEnglish
Article number138237
JournalJournal of Cleaner Production
Volume418
DOIs
Publication statusPublished - 15 Sept 2023

Keywords

  • Carbonation curing
  • Compressive strength
  • Dilution effect
  • Glass powder

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Environmental Science
  • Strategy and Management
  • Industrial and Manufacturing Engineering

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