Accelerated curing of cement mortar: In-situ carbonation utilising CO2-impregnated faujasite

Wenjie Luo, Bo Li, Mengxia Xu, Chengheng Pang, Edward Lester, Kien Woh Kow

Research output: Journal PublicationArticlepeer-review

4 Citations (Scopus)


This study explores the use of in-situ carbonation using CO2-impregnated faujasite (FAU) for accelerating the curing of cement mortar. Results indicate that adding 3–12 wt% CO2-impregnated FAU reduces the setting time of the mortars by 2–11% and significantly enhances the compressive strength of the mortars at 1, 7, and 28 days, compared to plain FAU. Microstructural analyses reveal that the in-situ carbonation promotes the hydration of cement by providing additional calcium carbonate nucleation sites for the C-S-H precipitation. This increases the formation of hydration products, which leads to the refinement of the pore structure. Additionally, the in-situ carbonation results in the formation of calcium carbonate crystals with a particle size of 150–200 nm at 28 days, with the calcium carbonate content increased by 1.9 wt% at an addition level of 12 wt% CO2-impregnated FAU. Overall, the in-situ carbonation technique shows great promise as an alternative method for accelerating the curing of cement-based materials, particularly for cast-in-place concrete.

Original languageEnglish
Article number131639
JournalConstruction and Building Materials
Publication statusPublished - 24 Jul 2023


  • Accelerated curing
  • Cement mortar
  • Faujasite
  • In-situ carbonation
  • Synthetic zeolite

ASJC Scopus subject areas

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


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