Production of concrete pipes by carbonation curing in an inflatable enclosure

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

5 Scopus Citations
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Author(s)

Detail(s)

Original languageEnglish
Article number129861
Journal / PublicationConstruction and Building Materials
Volume363
Online published29 Nov 2022
Publication statusPublished - 11 Jan 2023
Externally publishedYes

Abstract

Production of concrete pipes using ambient pressure (AP) carbonation curing in an inflatable enclosure was studied. The process was developed to replace traditional steam curing in order to reduce energy consumption, improve concrete performance and sequester carbon dioxide in pipes. The ambient pressure carbonation was compared with high pressure (HP) carbonation at 5 bar and normal hydration references. A composite structure of calcium carbonate with C—S—H was found in concrete after AP carbonation. Multiple techniques including quantitative X-ray diffraction analysis (QXRD), thermogravimetry analysis (TGA), Raman spectroscopic analysis, and scanning electron microscopy (SEM) were applied to characterize the strength development and microstructural enhancement of such cementitious matrix. The results demonstrated that AP carbonated pipes had comparable CO2 uptake, three-edge-bearing test (TEBT) strength, absorption, and resistance to internal-hydraulic pressure with HP carbonated ones. In addition, AP carbonation provided nucleating sites for C—S—H gel growth, thus contributing to the improved performance of concrete pipes while sequestrating CO2 and reducing the overall carbon footprint. Lastly, the carbon sequestration cost is lower in AP than in HP carbonation, which confirms the economic benefits of using AP in early-age carbonation curing of cement-based products. © 2022 Elsevier Ltd.

Research Area(s)

  • Ambient pressure, Carbonation, Carbonation curing, CO2 sequestration, Concrete pipe

Citation Format(s)

Production of concrete pipes by carbonation curing in an inflatable enclosure. / Xian, Xiangping; Mahoutian, Mehrdad; Shao, Yixin.
In: Construction and Building Materials, Vol. 363, 129861, 11.01.2023.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review