Article(id=1320090050805748581, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, articleNumber=null, orderNo=null, doi=10.14062/j.issn.0454-5648.20240665, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1729353600000, receivedDateStr=2024-10-20, revisedDate=1732377600000, revisedDateStr=2024-11-24, acceptedDate=null, acceptedDateStr=null, onlineDate=1792663594198, onlineDateStr=2026-10-22, pubDate=1747670400000, pubDateStr=2025-05-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792663594198, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792663594198, creator=13701087609, updateTime=1792663594198, updator=13701087609, issue=Issue{id=1320090049606172775, tenantId=1146029695717560320, journalId=1263187385517883426, year='2025', volume='53', issue='5', pageStart='1031', pageEnd='1402', issueExtLink='null', onlineDate='null', pubDate='1747670400000', pubDateStr='2025-05-20', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792663593913, creator='13701087609', updateTime=1792663765419, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1320090769013190788, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1320090769013190789, tenantId=1146029695717560320, journalId=1263187385517883426, issueId=1320090049606172775, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1193, endPage=1204, ext={EN=ArticleExt(id=1320090051044823910, articleId=1320090050805748581, tenantId=1146029695717560320, journalId=1263187385517883426, language=EN, title=High-Strength Carbon Dioxide Foam Concrete: Design, Preparation and Characteristics, columnId=1319726165087077079, journalTitle=Journal of the Chinese Ceramic Society, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=
Introduction

Large amounts of CO2 emissions have caused escalating challenges of global warming risk. The construction industry significantly contributes to global CO2 emissions, prompting the need for sustainable building materials. Carbon capture, utilization, and storage (CCUS) technologies provide a promising solution by reducing emissions and integrating carbon storage capabilities into materials. To this end, foam concrete, a lightweight porous material (normally 500-1600 kg/m3), has gained increasing attention for its significant advantages in energy-efficient and low emission buildings. Traditional foam concrete is lightweight with good insulation properties but has low strength and limited environmental benefits. In contrast, CO2 foam concrete offers the potential of reducing emissions during production and CO2 sequestration, making it a more environmentally friendly alternative.

The objective of this research was to develop a high-strength CO2 foam concrete (HSCFC) that incorporates carbon capture and storage (CCS). By enhancing foam stability and optimizing the concrete mixture, this study firstly developed a new HSCFC product with assessing the CO2 sequestration efficiency and micro/macro performance of the devloped material, thereby verifying its potential as both a sustainable building material and a solution for carbon reduction.

Methods

The design concept of HSCFC was based on integration of a CO2 foam precursor into a high-strength cement-based paste, utilizing particle packing theory to optimize strength and density. The CO2 foam was produced using a amphiphilic nano-silica modified sodium dodecyl sulfate foaming agent, enhancing the stability of the foam and preventing collapse of foam concrete. The HSCFC was prepared by mixing the CO2 foam with a high-strength cement slurry, followed by curing and a series of micro and macro testing to evaluate HSCFC performance, including compressive strength, concrete density, pore structure and microstructures.

Results and discussion

1) The CO2 foam exhibited a well-distributed pore size of 50-100 μm, which grew over time due to natural drainage and coalescence processes. The stability of the foam was attributed to the surfactant and nanoparticle interactions, which prevent CO2 diffusion and enhance liquid film strength. The overal performance of CO2 foam met the requirments of the Chinese standard for the concrete foam, which thus could be used to fabricate the foam concrete products. 2) The rheological behavior of HSCFC followed the Bingham model, with an increase in yield stress as CO2 foam volume increases, up to 110% compared to the control group. However, excessive foam content led to a reduction in yield stress due to the weakening of the matrix from enlarged pores. The plastic viscosity was inversely proportional to foam content, enhancing workability by reducing internal friction. 3) The increase in CO2 foam content led to the decrease in compressive strength of HSCFC. The compressive strength of HSCFC was found to be significantly higher than conventional foamed concretes, which is more than double that of typical foam concretes of similar density. Microhardness tests revealed values above 90 HV, close to ultra-high-performance concrete, despite the presence of foam. 4) X-ray computed tomography (XCT) analyses indicated that the pore structure of HSCFC became more complex as foam content increased, with the peak value of the pore size enlarging from 162.8 μm to over 1100 μm. This indicated the importance of balancing the compressive strength and density for the HSCFC. Additionally, using CO2 foam improved the cement hydration degree and led to the in-situ growth of calcium carbonate (CaCO3) on pore walls, enhancing pore wall strength. However, excessive foam amounts resulted in non-uniform pore distribution, leading to reduced material strength. 5) The thermal conductivity of HSCFC was lower than conventional concretes due to its porous structures. This property made the material suitable for energy-efficient buildings, where insulation is critical for reducing energy consumption. Therefore, the use of CO2 foam could realize the synergy of active and passive carbon reductions by carbon mineralization and decreasing engergy uses respectively.

Conclusion

This research demonstrated the successful design and development of a high-strength CO2 foam concrete system with superior mechanical properties, enhanced carbonation, and thermal insulation capabilities. The use of CO2 foam not only provided an effective CCUS solution but also significantly improved the performance. The synergistic effects of foam stability, internal carbonation, and matrix densification showed a promising pathway for the sustainable development of carbon-neutral building materials. Future research could focus on improving the overall performance of HSCFC and investigating its long-term service values. This material presents a novel approach for CO2 capture and utilization, alongside advancements in foam concrete technology. The developed materials can be further optimized to improve carbon sequestration efficiency, facilitating their use in innovative structures like energy-efficient and floating buildings.

, authors=Dingqiang FAN, Jianxin LU, Kangning LIU, Chisun POON, authorsList=Dingqiang FAN, Jianxin LU, Kangning LIU, Chisun POON, authorCompany=null, correspAuthors=Jianxin LU, authorNote=

FAN Dingqiang (1996-), male, Doctoral candidate. E-mail:

, correspAuthorsNote=
LU Jianxin (1988-), male, Ph.D., Assistant Professor. E-mail:
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CO2的大量排放给全球生态环境构成了严峻挑战。对此,提出了回收CO2废气制备高强CO2泡沫混凝土(HSCFC)的新策略,旨在实现混凝土领域的高效碳捕捉与碳利用。首先,提出了高强CO2泡沫混凝土的设计理念与方法,即将设计的CO2泡沫纳入基于颗粒紧密堆积理论设计的高强水泥浆体中。随后对制备的高强CO2泡沫混凝土材料进行了宏/微观性能评估。结果表明,设计的HSCFC具有低密度、高抗压强度(约为相似密度下普通泡沫混凝土强度的2倍)、高显微硬度(HV均值可达90)以及低导热系数。提高CO2泡沫用量可增加HSCFC的孔隙率,但使用过量CO2泡沫导致孔结构的粗化。此外,CO2泡沫的使用提高了水泥水化程度,并在水泥基体内产生了内碳化效应,于泡孔壁上原位生成大量碳酸钙,从而增强泡孔。研究成果为回收工业尾气制备固碳型泡沫混凝土提供了一条新途径,有利于水泥混凝土行业的低碳可持续发展。

, authors=范定强, 陆建鑫, 刘康宁, 潘智生, authorsList=范定强, 陆建鑫, 刘康宁, 潘智生, authorCompany=null, correspAuthors=陆建鑫, authorNote=

范定强(1996—),男,博士研究生。

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陆建鑫(1988—),男,博士,助理教授。
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高强二氧化碳泡沫混凝土的设计、制备与宏微观特性
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范定强 , 陆建鑫 , 刘康宁 , 潘智生
硅酸盐学报 | 研究论文 2025,53(5): 1193-1204
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硅酸盐学报 |研究论文 2025 , 53 (5) : 1193 -1204
高强二氧化碳泡沫混凝土的设计、制备与宏微观特性
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范定强 , 陆建鑫 , 刘康宁, 潘智生
作者信息
  • 香港理工大学土木及环境工程学系,香港理工大学碳中和资源工程研究中心,中国 香港 999077
通讯作者:
陆建鑫(1988—),男,博士,助理教授。
作者简介:

范定强(1996—),男,博士研究生。

High-Strength Carbon Dioxide Foam Concrete: Design, Preparation and Characteristics
Dingqiang FAN , Jianxin LU , Kangning LIU, Chisun POON
Affiliations
  • Department of Civil and Environmental Engineering & Research Centre for Resources Engineering Towards Carbon Neutrality (RCRE), The Hong Kong Polytechnic University, Kowloon, Hong Kong 999077, China
  • Corresponding Author:
    LU Jianxin (1988-), male, Ph.D., Assistant Professor. E-mail:

    FAN Dingqiang (1996-), male, Doctoral candidate. E-mail:

出版时间: 2025-05-20 doi: 10.14062/j.issn.0454-5648.20240665
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CO2的大量排放给全球生态环境构成了严峻挑战。对此,提出了回收CO2废气制备高强CO2泡沫混凝土(HSCFC)的新策略,旨在实现混凝土领域的高效碳捕捉与碳利用。首先,提出了高强CO2泡沫混凝土的设计理念与方法,即将设计的CO2泡沫纳入基于颗粒紧密堆积理论设计的高强水泥浆体中。随后对制备的高强CO2泡沫混凝土材料进行了宏/微观性能评估。结果表明,设计的HSCFC具有低密度、高抗压强度(约为相似密度下普通泡沫混凝土强度的2倍)、高显微硬度(HV均值可达90)以及低导热系数。提高CO2泡沫用量可增加HSCFC的孔隙率,但使用过量CO2泡沫导致孔结构的粗化。此外,CO2泡沫的使用提高了水泥水化程度,并在水泥基体内产生了内碳化效应,于泡孔壁上原位生成大量碳酸钙,从而增强泡孔。研究成果为回收工业尾气制备固碳型泡沫混凝土提供了一条新途径,有利于水泥混凝土行业的低碳可持续发展。

二氧化碳泡沫  /  泡沫混凝土  /  碳捕集  /  孔结构  /  内碳化
Introduction

Large amounts of CO2 emissions have caused escalating challenges of global warming risk. The construction industry significantly contributes to global CO2 emissions, prompting the need for sustainable building materials. Carbon capture, utilization, and storage (CCUS) technologies provide a promising solution by reducing emissions and integrating carbon storage capabilities into materials. To this end, foam concrete, a lightweight porous material (normally 500-1600 kg/m3), has gained increasing attention for its significant advantages in energy-efficient and low emission buildings. Traditional foam concrete is lightweight with good insulation properties but has low strength and limited environmental benefits. In contrast, CO2 foam concrete offers the potential of reducing emissions during production and CO2 sequestration, making it a more environmentally friendly alternative.

The objective of this research was to develop a high-strength CO2 foam concrete (HSCFC) that incorporates carbon capture and storage (CCS). By enhancing foam stability and optimizing the concrete mixture, this study firstly developed a new HSCFC product with assessing the CO2 sequestration efficiency and micro/macro performance of the devloped material, thereby verifying its potential as both a sustainable building material and a solution for carbon reduction.

Methods

The design concept of HSCFC was based on integration of a CO2 foam precursor into a high-strength cement-based paste, utilizing particle packing theory to optimize strength and density. The CO2 foam was produced using a amphiphilic nano-silica modified sodium dodecyl sulfate foaming agent, enhancing the stability of the foam and preventing collapse of foam concrete. The HSCFC was prepared by mixing the CO2 foam with a high-strength cement slurry, followed by curing and a series of micro and macro testing to evaluate HSCFC performance, including compressive strength, concrete density, pore structure and microstructures.

Results and discussion

1) The CO2 foam exhibited a well-distributed pore size of 50-100 μm, which grew over time due to natural drainage and coalescence processes. The stability of the foam was attributed to the surfactant and nanoparticle interactions, which prevent CO2 diffusion and enhance liquid film strength. The overal performance of CO2 foam met the requirments of the Chinese standard for the concrete foam, which thus could be used to fabricate the foam concrete products. 2) The rheological behavior of HSCFC followed the Bingham model, with an increase in yield stress as CO2 foam volume increases, up to 110% compared to the control group. However, excessive foam content led to a reduction in yield stress due to the weakening of the matrix from enlarged pores. The plastic viscosity was inversely proportional to foam content, enhancing workability by reducing internal friction. 3) The increase in CO2 foam content led to the decrease in compressive strength of HSCFC. The compressive strength of HSCFC was found to be significantly higher than conventional foamed concretes, which is more than double that of typical foam concretes of similar density. Microhardness tests revealed values above 90 HV, close to ultra-high-performance concrete, despite the presence of foam. 4) X-ray computed tomography (XCT) analyses indicated that the pore structure of HSCFC became more complex as foam content increased, with the peak value of the pore size enlarging from 162.8 μm to over 1100 μm. This indicated the importance of balancing the compressive strength and density for the HSCFC. Additionally, using CO2 foam improved the cement hydration degree and led to the in-situ growth of calcium carbonate (CaCO3) on pore walls, enhancing pore wall strength. However, excessive foam amounts resulted in non-uniform pore distribution, leading to reduced material strength. 5) The thermal conductivity of HSCFC was lower than conventional concretes due to its porous structures. This property made the material suitable for energy-efficient buildings, where insulation is critical for reducing energy consumption. Therefore, the use of CO2 foam could realize the synergy of active and passive carbon reductions by carbon mineralization and decreasing engergy uses respectively.

Conclusion

This research demonstrated the successful design and development of a high-strength CO2 foam concrete system with superior mechanical properties, enhanced carbonation, and thermal insulation capabilities. The use of CO2 foam not only provided an effective CCUS solution but also significantly improved the performance. The synergistic effects of foam stability, internal carbonation, and matrix densification showed a promising pathway for the sustainable development of carbon-neutral building materials. Future research could focus on improving the overall performance of HSCFC and investigating its long-term service values. This material presents a novel approach for CO2 capture and utilization, alongside advancements in foam concrete technology. The developed materials can be further optimized to improve carbon sequestration efficiency, facilitating their use in innovative structures like energy-efficient and floating buildings.

carbon dioxide foam  /  foam concrete  /  carbon capture  /  pore structure  /  internal carbonation
范定强, 陆建鑫, 刘康宁, 潘智生. 高强二氧化碳泡沫混凝土的设计、制备与宏微观特性. 硅酸盐学报, 2025 , 53 (5) : 1193 -1204 . DOI: 10.14062/j.issn.0454-5648.20240665
Dingqiang FAN, Jianxin LU, Kangning LIU, Chisun POON. High-Strength Carbon Dioxide Foam Concrete: Design, Preparation and Characteristics[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (5) : 1193 -1204 . DOI: 10.14062/j.issn.0454-5648.20240665
  • 国家自然科学基金(52308275)
  • 广东省基础与应用基础研究海上风电联合基金(2024A1515240013)
  • 香港创新及科技基金(ZS1H; ZM3H)
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doi: 10.14062/j.issn.0454-5648.20240665
  • 接收时间:2024-10-20
  • 首发时间:2026-10-22
  • 出版时间:2025-05-20
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  • 收稿日期:2024-10-20
  • 修回日期:2024-11-24
基金
国家自然科学基金(52308275)
广东省基础与应用基础研究海上风电联合基金(2024A1515240013)
香港创新及科技基金(ZS1H; ZM3H)
作者信息
    香港理工大学土木及环境工程学系,香港理工大学碳中和资源工程研究中心,中国 香港 999077

通讯作者:

陆建鑫(1988—),男,博士,助理教授。
参考文献
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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20240665
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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