New Ecological Concrete that Reduces CO2 Emissions Below Zero Level ∼ New Method for CO2 Capture and Storage ∼

Yoshioka, Kanji; Obata, D.; Nanjo, Hiroshi; Yokozeki, Kosuke; Torichigai, Takeshi; Morioka, Minoru; Higuchi, Takayuki

doi:10.1016/j.egypro.2013.06.530

Cited by 51 publications

(15 citation statements)

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“…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%

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

et al. 2021

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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.

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Section: Resultsmentioning

confidence: 99%

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

et al. 2021

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“…Both ready-mix and precast concrete can find their applications [50][51][52]. In recent years, several interesting precast concrete applications in the presence of alternative cementitious materials, like steelmaking slags or coal fly ash, have emerged that claim to generate carbon-negative footprints [52][53][54]. This is possible if the binder material has a very low carbon footprint, significant amounts of waste CO2 are bound, the processing is not very carbon-intensive, and the transportation distances are reasonable.…”

Section: Carbon-negative Concrete Productionmentioning

confidence: 99%

The Carbon Dioxide Emissions Reduction Potential of Carbon-Dioxide-Cured Alternative Binder Concrete

Mäkikouri

Vares

Korpijärvi

et al. 2021

RPM

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Climate change has been identified as one of the biggest issues plaguing human life at present. Hence, immense attention is being paid to developing methods that can potentially reduce carbon dioxide emission. With the help of carbon-negative concrete, manufactured from alternative binders and cured with waste carbon dioxide, a major part of the manufacturing industries that emit carbon dioxide can be potentially turned into a carbon sink. In this study, the waste material streams in Finland, suitable for disposing carbon-dioxide-cured concrete, were mapped. Mine tailings, blast furnace and steel slags, recycled concrete, biomass, coal and municipal waste incineration ashes, green liquor dregs, and foundry sands were studied. It was found that there were sufficient amounts of potential secondary raw materials (about 27 Mt/a) for the preparation of Finnish cement and the production of concrete (requirement: approximately 1.4 Mt/a and 11.2 Mt/a, respectively). The total carbon dioxide uptake potential was estimated to be approximately 1.9 Mt/a (vs. emissions from the cement industry in Finland, 0.84 Mt/a). In addition, the carbon footprints of the conventionally manufactured concrete block were compared with the carbon footprint produced by a modeled carbon-dioxide-cured blast furnace slag block. If such novel concrete were used to produce all the concrete-based substances, it would bring down the emission of carbon dioxide from 1.9% to negative 1.3% in Finland.

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“…Possible approaches to be carbon neutral are CO 2 capture and storage (CCS) or Belite-Ye'elimite-Ferrite (BYF) clinkers (e.g. "Aether" or "Ternocem") but these approaches face various technical limits and expensive cost [1,9,10]. Another feasible method to minimise CO 2 emission is substitution of Portland cement by using supplementary cementitious materials (SCMs).…”

Section: Figurementioning

confidence: 99%

Influence of Calcined Clay Reactivity on the Mechanical Properties and Chloride Diffusion Resistance of Limestone Calcined Clay Cement (LC3) Concrete

Nguyen

Afroz

Castel

2020

JMSE

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Calcined clay plays an important role in the performance of limestone calcined clay cement (LC3) concrete. In this study, the performance of two different types of calcined clay produced from different calcination processes were investigated in chloride environment. The characteristics of the calcined clays, including mineral composition, chemical composition, particle size distribution, specific surface area and particle morphology, were evaluated. Based on the reactivity of the calcined clays, the compressive strength of concretes after up to 28 days of curing was adopted as the best measure to determine the appropriate replacement levels of Portland cement by LC3 to satisfy standards requirements for concrete in chloride environments. The chloride bulk diffusion test was conducted to investigate the performance of LC3 concretes in comparison with reference Portland cement concrete. Similar chloride diffusion resistance could be achieved by using the two different calcined clays in LC3 concrete. The performance of both LC3 concretes was much better than that of reference concrete. However, the Portland cement substitution rate for each calcined clay was governed by the compressive strength standard requirements.

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New Ecological Concrete that Reduces CO2 Emissions Below Zero Level ∼ New Method for CO2 Capture and Storage ∼

Cited by 51 publications

References 0 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

The Carbon Dioxide Emissions Reduction Potential of Carbon-Dioxide-Cured Alternative Binder Concrete

Influence of Calcined Clay Reactivity on the Mechanical Properties and Chloride Diffusion Resistance of Limestone Calcined Clay Cement (LC3) Concrete

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