Assessment of mechanical properties of concrete incorporating carbonated recycled concrete aggregates
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Small RCA tend to have a high mass percentage of old mortars containing high calcium composition available for carbonation, and small RCA have a larger specific surface area in contact with CO2 compared to large particles.
“This is attributed to (i) small RCA tend to have a high mass percentage of old mortars containing high calcium composition available for carbonation [54,79,86] and (ii) small RCA have a larger specific surface area (in contact with CO 2 ) compared to RCA with large particles [91].”
From An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry (2022) · cites this paper as [86]
Most previous studies suggested an optimal relative humidity between 50% and 70% for gas-solid carbonation of RCA at ambient temperature.
“Because carbonation reactions hardly take place at low moisture content, most previous studies suggested an optimal RH ranging between 50% and 70% for gas-solid carbonation at ambient temperature [19,86,93,94].”
From An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry (2022) · cites this paper as [86]
The strength enhancement induced by carbonated RCA is mainly due to reinforced interfacial transition zones between mortar and carbonated RCA.
“and (ii) reinforced interfacial transition zones between mortar and carbonated RCA [86,88,165,167,170].”
From An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry (2022) · cites this paper as [86]
The strength enhancement induced by carbonated RCA is mainly due to improved physical properties of RCA after carbonation (reduced porosity and increased strength).
“Mechanisms behind the strength enhancement induced by carbonated RCA are due mainly to (i) improved physical properties of RCA after carbonation (reduced porosity and increased strength)”
From An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry (2022) · cites this paper as [86]
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Self-citation
- Authors
- Xuan, D., Zhan, B., & Poon, C. S.
- Affiliations
- Hong Kong Polytechnic University (HK)
- Corresponding author
- Poon, Chi Sun
- Venue
- Cement and Concrete Composites
- Publisher
- Elsevier BV
- Published
- 2016-01
- Volume
- 65
- Pages
- 67-74
- ISSN
- 0958-9465 (ISSN-L)
- OpenAlex
- W1772241051
- Cited by
- 620
- References
- 0
- Citations by year
- 2026: 91 · 2025: 87 · 2024: 92 · 2023: 72 · 2022: 79 · 2021: 69 · 2020: 50 · 2019: 30 · 2018: 23 · 2017: 18 · 2016: 8 · 2014: 1
- FWCI
- 22.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Cement and Concrete Composites (publishedVersion)
- PolyU Institutional Research Archive (Hong Kong Polytechnic University) (submittedVersion)
- Funders
- Innovation and Technology Support Programme Guangdong-Hong Kong Technology Cooperation Funding Scheme (GHP/014/12SZ)
- Topics
- Physical Sciences › Engineering › Building and Construction › Recycled Aggregate Concrete Performance
- Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
- Physical Sciences › Engineering › Mechanical Engineering › Materials Engineering and Processing
- Keywords
- recycled concrete aggregate, carbonation treatment, mechanical properties of concrete, accelerated carbonation, CO2 pressure, aggregate replacement, demolition waste, compressive strength, recycled aggregate concrete
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