Dynamic carbonation curing of fresh lightweight concrete

Hilal El-Hassan, Yixin Shao

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


The reaction of fresh lightweight concrete with carbon dioxide during early-age carbonation curing is hindered by surface saturation due to vibration consolidation. To promote a high degree of carbonation of fresh lightweight concretes, a dynamic carbonation system was developed to remove surface free water and inject carbon dioxide simultaneously. Based on cement mass, the resulting carbon uptake reached 13% in 4 h carbonation and 20% in 18 h carbonation. The early strength by fresh carbonation is comparable to that of steam curing, while the late strength is higher in a much reduced process time. The dynamic system can effectively control the relative humidity of the chamber to prevent water accumulation and create a route of capillaries for carbon dioxide diffusion and precipitation of carbonates. Dynamic carbonation creates a carbonate-bond matrix. The process provides an excellent means to recycle carbon dioxide, with economic and environmental benefits.

Original languageEnglish
Pages (from-to)708-718
Number of pages11
JournalMagazine of Concrete Research
Issue number14
Publication statusPublished - 2014
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


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