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Effect of Carbonation Mixing on CO2 Uptake and Strength Gain in ...

Oct 10, 2017  It was found that carbonation mixing could increase the CO 2 uptake but decrease the strength gain. The reduction in strength by carbonation mixing was caused by the formation of carbonate coating on cement particles. The property can be improved if air mixing is introduced right after carbonation mixing. Access content

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Effect of Carbonation Mixing on CO2 Uptake and

Oct 10, 2017  It was found that carbonation mixing could increase the CO 2 uptake but decrease the strength gain. The reduction in strength by carbonation mixing was caused by the formation of carbonate coating on cement particles. The property can be improved if air mixing is introduced right after carbonation mixing.

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Effect of Carbonation Mixing on Uptake and Strength

It was found that carbonation mixing could increase the CO2uptake but decrease the strength gain. The reduction in strength by carbonation mixing was caused by the formation of carbonate coating on...

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Effect of Carbonation Mixing on CO 2 Uptake and

Oct 01, 2017  It was found that carbonation mixing could increase the CO2 uptake but decrease the strength gain. The reduction in strength by carbonation mixing was caused by the formation of carbonate coating...

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Effect of Carbonation Mixing on CO₂ Uptake and Strength

This paper studies the effect of carbonation mixing on CO₂ uptake and strength gain of cement paste, which is the key carbon-reactive ingredient in concrete. Three mixing methods were investigated: (1) normal air mixing, (2) carbonation mixing, and (3) hybrid mixing with carbonation mixing first, followed by normal air mixing.

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Carbonation and CO2 uptake of concrete - ScienceDirect

Apr 01, 2014  The carbonation rate is significantly affected by CO 2 diffusion through the internal pore system, the degree of solubility of components of the cement paste and the physiochemical reaction of these materials ( Jung, 2003 ).

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Effects of carbonation pressure and duration on strength

Apr 01, 2017  This paper presents the results of an experimental study conducted to evaluate the effects of carbonation pressure and duration on the CO 2 uptake and evolution of strength of a concrete mixture. Concrete specimens were cured under six ACC pressures varying from 10 to 60 psi, applied for a duration of 1–10 h in a closed chamber.

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CO2 uptake potential due to concrete carbonation: A case

Jun 01, 2017  CO 2 uptake of the Itaipu Dam due to concrete carbonation was studied. • 155 concrete samples were extracted for carbonation depth measurement. • The carbonation has tended to increase with the dam elevation. • The results indicate the potentiality of CO 2 uptake during the service life. •

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An overview of utilizing CO2 for accelerated carbonation

Jun 01, 2022  High CO 2 concentration can accelerate the formation of carbonate ions in liquid but hardly affect the solubility of CO 2, which is dependent mainly on temperature and pressure. In general, temperature rise would compromise the increased dissolution of CO 2 in water induced by rising pressure [100], as shown in Fig. 4.

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Effects of carbonation on carbon dioxide capture and the

Nov 02, 2020  Carbon dioxide uptake increased when CDP amine sorbents were mixed into the concrete specimens, with 5-amino-1-pentanol and piperazine showing the best efficiency, with carbon dioxide uptakes of 244% and 224%, respectively. The compressive and bending strengths also increased with carbonation.

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Effects of accelerated carbonation on carbon dioxide uptake

The effect on compressive strength was measured from repeated tests with single granules and the effect on carbon dioxide uptake was measured with both quantitative analysis on TG-DSC-QMS graphs and high-temperature oxygen combustion gas analysis of ground samples. ... Effects of accelerated carbonation on carbon dioxide uptake and compressive ...

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Effects of accelerated carbonation on carbon dioxide

fly ashes, water, carbonated water and bottle CO 2 with five processess All carbonation methods increased the crush strength of granules Up to 166 kg/t higher CO 2 uptake vs. control –control is not zero! Bulk density ~700-730 kg/m3 business climate benefit opportunity in replacing other lightweight aggregates Figure 1. Our very

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Effects of Accelerated Carbonation Curing on CO2 Sequestration

Its manufacture is energy and carbon intensive and approximately 900 kg of CO2 is emitted into the atmosphere for each tonne of Portland cement produced. The (PDF) Effects of Accelerated Carbonation Curing on CO2 Sequestration and on the Compressive Strength of Concrete Masonry Units Niall Holmes - Academia

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CO2 uptake by carbonation of concrete during life cycle of

2 uptake due to concrete carbonation Carbonation is a result of CO 2 chemical reactions with alkaline products of cement hydration, in order to form calcium carbonate (CaCO 3) and water. This reaction (Ca(OH) 2? CO 2? CaCO 3? H 2O) reduces concrete pH, so, steel becomes susceptible to corrosion. On the other hand, the same reaction uptakes CO 2 ...

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Effect of Carbonation on High Strength Concrete – IJERT

May 06, 2017  Keywords Carbonation, Durability of HPC, Effect on compressive strength, Reinforcement corrosion. INTRODUCTION. Carbonation of concrete is traditionally defined as the chemical reaction between atmospheric carbon dioxide and the products of cement hydration particularly in accordance with the reaction.

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Effect of additives on carbon dioxide uptake and compressive strength

Jan 04, 2021  The experimental results showed that both the carbonation reactions and the compressive strength of dry-cast concrete mixtures were improved when using chemical additives. Experimental investigations for optimisation were also undertaken with selected additives to further increase the carbon dioxide uptake and improve the compressive strength.

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An overview on the influence of various parameters on the

Jul 01, 2022  The studied mixes were exposed to 15 and 25 % of CO2 concentration for a period of 24 hours. The efficiency was evaluated through compressive strength, carbonation depth, CO2-uptake and weight change.

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Evaluation of the Carbon Dioxide Uptake of Slag-Blended

Considering carbonation both during the use stage (50 years) and after the demolition stage (59.51 years), the total carbon dioxide uptake ratio is 19.21%. On the other hand, if we only consider carbonation during the use stage (50 years), the carbon dioxide uptake ratio is 4.61%.

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Progress in reducing calcination reaction temperature of Calcium ...

Jul 07, 2022  The calcium looping (CaL) process is a promising CO 2 capture technology based on a reversible reaction, CaO(s) + CO 2 (g) ↔ CaCO 3 (s), and the forward and reverse directions of this reaction are often referred to as carbonation and calcination. Although CaO-based sorbent has the advantages of abundant reserves, low cost, and high theoretical capacity of CO 2, it is

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CO2 Uptake of Carbonation-Cured Cement Blended with Ground

Nov 05, 2018  The present study investigates the CO 2 uptake capacity of carbonation-cured PC blended with VA. PC paste samples were synthesized by substituting PC with VA by 0%, 20%, 30%, 40%, and 50% by mass of cement. The samples were carbonation-cured by exposing them for one day in an accelerated carbonation chamber at a 5% atmospheric CO 2

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Effects of carbonation pressure and duration on strength

Apr 01, 2017  @article{Ahmad2017EffectsOC, title={Effects of carbonation pressure and duration on strength evolution of concrete subjected to accelerated carbonation curing}, author={Shamsad Ahmad and Rida Alwi Assaggaf and Mohammed Maslehuddin and Omar Saeed Baghabra Al-Amoudi and Saheed Kolawole Adekunle and Syed Imran Ali},

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Effect of compacting pressure and carbonation duration on

The carbonated samples were under the optimal conditions. The steel slag sample reached a carbon dioxide uptake of 6.89% while the Portland cement sample reached 6.34% which was 7.98% lower than the steel slag CO2 uptake. Tab. 4 shows the carbon weight before and after carbonation and the carbon dioxide uptake of the carbonated samples.

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Amount of weight loss (%) and CaCO 3 content (%) generated in

Download scientific diagram Amount of weight loss (%) and CaCO 3 content (%) generated in samples, calculated from TGA and XRD analysis from publication: Effect of Accelerated Carbonation on the ...

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Effects of accelerated carbonation on carbon dioxide

fly ashes, water, carbonated water and bottle CO 2 with five processess All carbonation methods increased the crush strength of granules Up to 166 kg/t higher CO 2 uptake vs. control –control is not zero! Bulk density ~700-730 kg/m3 business climate benefit opportunity in replacing other lightweight aggregates Figure 1. Our very

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The effects of accelerated carbonation on CO(2) uptake and

The main effects of carbonation on trace metal leaching involved a significant decrease in mobility for Pb, Zn and Cu at high pH values, a slight change or mobilization for Cr and Sb, and no major effects on the release of As and soluble salts. Geochemical modelling of leachates indicated solubility control by different minerals after carbonation.

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Maximizing CO2 Uptake in Concrete Blocks

Nov 08, 2013  The best CO2 uptake was obtained with relatively high water content in initial mix design followed by 18h presetting and 2 - 4h carbonation. It was 18.3% in normal weight concretes and 24.2% in lightweight concretes.

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Effects of Environmental Factors on Concrete Carbonation Depth

Nov 02, 2018  The influence of temperature, CO₂ concentration and relative humidity on the carbonation depth and compressive strength of concrete was investigated. Meanwhile, phase composition, types of hydration products and microstructure characteristics of samples before and after the carbonation were analyzed

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Accelerated Carbonation Curing as a Means of

Oct 01, 2020  It is worth noting that the highest carbon uptake and strength results were noted for samples that were preconditioned for 18 hours in open air prior to carbonation [82, 86, 109, 110]. Additionally, carbonation improved

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Effects of carbonation pressure and duration on strength

Apr 01, 2017  @article{Ahmad2017EffectsOC, title={Effects of carbonation pressure and duration on strength evolution of concrete subjected to accelerated carbonation curing}, author={Shamsad Ahmad and Rida Alwi Assaggaf and Mohammed Maslehuddin and Omar Saeed Baghabra Al-Amoudi and Saheed Kolawole Adekunle and Syed Imran Ali},

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An overview on the influence of various parameters on the

Jul 01, 2022  The studied mixes were exposed to 15 and 25 % of CO2 concentration for a period of 24 hours. The efficiency was evaluated through compressive strength, carbonation depth, CO2-uptake and weight change.

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Heavy Metal Leaching, CO2 Uptake and Mechanical

Sep 01, 2015  In the present study, a porous concrete with alkali activated slag (AAS) and coal bottom ash was developed and the effect of carbonation on the physical property, microstructural characteristic, and heavy metal leaching behavior of the porous concrete were investigated. Independent variables, such as the type of the alkali activator and binder, the

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Progress in reducing calcination reaction temperature of Calcium ...

Jul 07, 2022  The calcium looping (CaL) process is a promising CO 2 capture technology based on a reversible reaction, CaO(s) + CO 2 (g) ↔ CaCO 3 (s), and the forward and reverse directions of this reaction are often referred to as carbonation and calcination. Although CaO-based sorbent has the advantages of abundant reserves, low cost, and high theoretical capacity of CO 2, it is

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Evaluation of the Carbon Dioxide Uptake of Slag-Blended

Carbon dioxide will be absorbed into concrete due to carbonation. Compared with abundant research regarding carbonation and the carbon dioxide emission life cycle [3–20], the study of carbon dioxide uptake is relatively limited. In recent years, References [21–25] presented some analysis models of the carbon dioxide uptake from carbonation.

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Repository at Hanyang University: Effects of carbonation on CO2

The CO2 in the atmosphere was sequestrated into the concrete as simulated carbonation weathering occurred, and the CO2 uptake was measured via thermogravimetric analysis. CO2 uptake increased when CO2 philic amine sorbents were mixed into the concrete specimens, with 5-amino-1-pentanol and piperazine showing the best efficiency in CO2 uptake (5 ...

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Evaluation of CO2 Uptake of Fly-Ash-Blended High- Strength

Nov 01, 2020  The total CO2 uptake ratio is determined as the sum of CO2 uptake in the service and recycling stages. The calculation results show that, as the FA replacement ratio increases from 0 to 40%, the CO2 uptake ratio in the service stage increases from 2.78 to 4.72%, and the total CO2 uptake ratio increases from 18.9 to 20.8%.

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CO2 Inhalation of Concrete Structures: The Case of Carbon Uptake

Apr 22, 2021  The developed carbon uptake model can be used for roughly estimating the CO2 absorbed by any concrete elements and the results of this can provide insights towards the inclusion of carbon uptake in the calculation of the environmental impact of concrete structures. This webinar will be presented by CSHub Postdoctoral Associate Hessam AzariJafari.

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