CO2 Sequestration in Cement-Based Materials During Mixing Process Using Carbonated Water and Gaseous CO2

Kwasny, Jacek; Basheer, Pam; Russell, Mark; Doherty, William O.S.; Owens, Kieran; Ward, Neil

doi:10.5703/1288284315385

Cited by 21 publications

(22 citation statements)

References 7 publications

(6 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This analysis focusses on the use of pure CO 2 and two approaches of CO 2 utilization-curing and mixing-as they are more extensively investigated (e.g., 99 datasets used in this study) than alternate approaches such as concrete curing with flue gas 21,[45][46][47] , carbonation of recycled concrete aggregates 9 , CO 2 sequestration in alternative MgO based binders 10 , and CO 2 dissolution in mixing water 13,14 . The increased availability of experimental data is necessary to robustly quantify the net CO 2 benefit of CCU concrete and account for the impact of data uncertainty and process variability on the results.…”

Section: Resultsmentioning

confidence: 99%

“…Multiple emerging approaches such as carbonation of recycled concrete aggregates 9 , CO 2 sequestration in alternative MgO based binders 10 , CO 2 mineralization in industrial waste-derived aggregates and fillers 11,12 , and CO 2 dissolution in mixing water 13,14 have been investigated for CO 2 utilization in concrete. However, this study focuses on the two approaches of CO 2 mixing and CO 2 curing as they are more extensively analyzed and applied for CO 2 utilization in concrete (Supplementary information (SI) Section 2).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

et al. 2021

View full text Add to dashboard Cite

Carbon capture and utilization for concrete production (CCU concrete) is estimated to sequester 0.1 to 1.4 gigatons of carbon dioxide (CO2) by 2050. However, existing estimates do not account for the CO2 impact from the capture, transport and utilization of CO2, change in compressive strength in CCU concrete and uncertainty and variability in CCU concrete production processes. By accounting for these factors, we determine the net CO2 benefit when CCU concrete produced from CO2 curing and mixing substitutes for conventional concrete. The results demonstrate a higher likelihood of the net CO2 benefit of CCU concrete being negative i.e. there is a net increase in CO2 in 56 to 68 of 99 published experimental datasets depending on the CO2 source. Ensuring an increase in compressive strength from CO2 curing and mixing and decreasing the electricity used in CO2 curing are promising strategies to increase the net CO2 benefit from CCU concrete.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The carbonation of alkali-activated materials is a chemically controlled mechanism that occurs in two steps: (1) carbonation of the pore solution leading to a reduction in pH and the eventual precipitation of Na-rich carbonates, followed by (2) the decalcification of Ca-rich phases (mainly C-S-H, as portlandite usually does not form in these systems) and carbonation of secondary reaction products present in the system (Bernal, 2014). Kwasny et al (2014) also noticed that using accelerated CO 2 curing increases the rate of the initial hydration of the carbonated cementitious pastes. This increase in compressive strength can be related to the fact that carbonation curing refines the porosity and pore size of the cementitious pastes as reported by others (He et al, 2016;.…”

Section: Compressive Strengthmentioning

confidence: 90%

Carbon dioxide sequestration on fly ash/waste glassalkali-based mortars with recycled aggregates

Mastali

Abdollahnejad

Pacheco-Torgal

2018

Carbon Dioxide Sequestration in Cementitious Construction Materials

View full text Add to dashboard Cite

Carbon dioxide sequestration is crucial for limiting global warming (Hansen et al., 2017). That is why carbon sequestration constitutes one of the Grande Challenges of Engineering (Mote et al., 2016). Currently this carbon sequestration is carried out mostly through geologic CO 2 storage in saline aquifers (Zhang and Huisingh, 2017). However, that constitutes a passive strategy, involves huge risks, and also comes with a very high cost. Carbon capture and storage from the stream of concentrated CO 2 at fossil fuel burning sites like power plants or steel plants is more efficient and thus less expensive than direct air capture (Hansen et al., 2017). Several authors (Bertos et al., 2004; Jang et al., 2016) have studied the use of CO 2 for accelerated curing of cementitious construction materials. This technology will in future not only minimize release of carbon dioxide into the atmosphere but also accelerate curing and strength development of those materials. However, so far no studies were performed on alkali-based materials. These materials are produced through the reaction of an aluminosilicate powder (precursor) with an alkaline activator, usually composed by hydroxide, silicate, carbonate, or sulfate leading to the formation of an amorphous aluminosilicate gel and secondary nanocrystalline zeolite-like structures (Provis, 2014). These materials have a particular ability for the reuse of several types of wastes (Pay a et al., 2014; Bernal et al., 2016). Some wastes like fly ash (FA) deserve a special attention because they are generated in large amount and have a very low reuse rate. USA has a reuse rate for FA of around 50%, meaning that Carbon Dioxide Sequestration in Cementitious Construction Materials

show abstract

“…Fifty four concrete cube samples (100 mm Â 100 mm Â 100 mm) were prepared. Eighteen samples serving as control samples and the balance were divided and used with the two methods of introducing the carbon dioxide, namely: (1) Using carbonated water in the mixing process (Kwasny et al, 2014)(Andre, 2017.…”

Section: Experimental Methodology 31 Casting Of Concretementioning

confidence: 99%

The effect of CO₂ loading on the properties of normal concrete vs fly ash concrete

Tonder

Low

2021

JEDT

View full text Add to dashboard Cite

Purpose There is an increase in greenhouse gasses and global climate change is frequently reported on. What can be done? Certainly to try and reduce the carbon footprint, which is not a new topic, by encouraging applications and activities for concrete during its lifetime (Portland Cement Association, 2019). This study aims to focus on introducing CO2 to normal and fly ash concrete and thus investigating the effect on the carbon footprint of the samples and the effectiveness of the CO2 introduction methods, namely, carbonated water addition during the mixing process and by means of an infusion pipe directly into the concrete when the samples are casted and have been casted. Design/methodology/approach The feasibility of carbon dioxide storage within concrete is determined by investigating the effects of introduced carbon dioxide into concrete samples and the effectiveness of the concrete at storing carbon dioxide. The concrete was mixed in a 1:3:3 ratio for the OPC or blended 52.5 R cement:sand:stone (22 mm) with a 28 day strength of 50 MPa. Samples were also prepared containing low-grade fly ash cement contents ranging from 15% to 60%. CO2 was introduced to the concrete via carbonated mixing water and an infusion pipe system directly to the hardening concrete cubes. In total, 16 g CO2 bicycle carbon dioxide inflators and valve system were used to infuse the concrete over a period of a week until the canister was emptied with valve release on the lowest setting. A compression test was carried out to determine the strength of the concrete cubes with, and without, the introduction of carbon dioxide. Results were also obtained using a scanning electron microscope (SEM) and energy dispersive x-ray spectrometer (EDS) to determine how the carbon dioxide changed the microscopic composition and chemical composition of the concrete. A microcontroller with carbon dioxide sensors was used to gather carbon dioxide emission data for a period of three months. Findings The compressive strength tests show by introducing carbon dioxide to the concrete, the compressive strength has increased by as much as 13.86% as expected from the literature. Furthermore, by infusing carbon dioxide with the fly ash blended cement, will give a higher strength compared to the control with ordinary portland cement. This correlates to an overall reduction in cost for the structure. The optimal fly ash content for the control with minimal strength degradation is 30%. Where the optimal fly ash content for the concrete with carbon dioxide stored within, is 45%. The SEM analysis showed the concrete with sequestered carbon dioxide has significantly more calcium silicate hydrate (C-S-H) gel formation, thus the strength increase. Furthermore, the carbon dioxide emission test showed the concrete with infused carbon dioxide stores carbon dioxide more efficiently compared to the control sample. With the data showing the infused sample releases 11.19% less carbon dioxide compared to the control sample. However, the carbonated water sample releases 20.9% more carbon dioxide when compared to the control sample. Thus the introduction of carbon dioxide by means of infusion is more effective. Practical implications This is a practical pilot investigation of carbon dioxide introduction via two methods, one being infusion of CO2 into normal concrete and fly ash concrete and two, mixing normal and fly ash concrete with carbonated water. These results show, cheaper cement can be used to achieve equivalent or better strength. This can help in the reduction of the construction industry’s carbon footprint. Originality/value By reducing the construction industry’s carbon footprint with this research results, a saving can not only be made financially in the construction industry, but this will help to preserve our environment for future generations.

show abstract

CO2 Sequestration in Cement-Based Materials During Mixing Process Using Carbonated Water and Gaseous CO2

Cited by 21 publications

References 7 publications

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

Carbon dioxide sequestration on fly ash/waste glassalkali-based mortars with recycled aggregates

The effect of CO₂ loading on the properties of normal concrete vs fly ash concrete

Contact Info

Product

Resources

About

CO2 Sequestration in Cement-Based Materials During Mixing Process Using Carbonated Water and Gaseous CO2

Cited by 21 publications

References 7 publications

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

Carbon dioxide utilization in concrete curing or mixing might not produce a net climate benefit

Carbon dioxide sequestration on fly ash/waste glassalkali-based mortars with recycled aggregates

The effect of CO2 loading on the properties of normal concrete vs fly ash concrete

Contact Info

Product

Resources

About

The effect of CO₂ loading on the properties of normal concrete vs fly ash concrete