Hydration of cement pastes with calcium carbonate polymorphs

Zhao, Diandian; Williams, Jonah M.; Li, Zhanzhao; Park, Ah‐Hyung Alissa; Radlińska, Aleksandra; Hou, Pengkun; Kawashima, Shiho

doi:10.1016/j.cemconres.2023.107270

Cited by 47 publications

(9 citation statements)

References 78 publications

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“…68,69 The anhydrous polymorphs of calcite carbonate have been shown to modify the hydration kinetics of cement through this filler effect in additional studies. 26 The replacement of OPC with calcium carbonates, with potential advantageous properties and without any damage to the integrity of the material is of extreme importance in a carbon-constrained world. This allow for multiple aspects of CO 2 savings: firstly, in the capture of CO 2 to synthesize various morphologies aof calcium carbonate; secondly, to replace a portion of OPC with these carbonates to offset emissions associated with cement clinker production.…”

Section: Resultsmentioning

confidence: 99%

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Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization

Williams,

Zhao,

Zhang

et al. 2023

CrystEngComm

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Section: Resultsmentioning

confidence: 99%

“…25 More recently, Zhao et al (2023a) showcased the potential advantages of aragonite during the hydration and curing of cement pastes. 26 Additional, Zhao et al (2023b) also studied the modification of the rheological properties of aragonite-cement paste and its potential use is 3-D concrete printing applications. 27…”

Section: Introductionmentioning

confidence: 99%

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization

Williams,

Zhao,

Zhang

et al. 2023

CrystEngComm

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“…ACC is most commonly found in vivo and tends to be thermodynamically unstable ex vivo [79]. Understanding the differences in these polymorphs is of particular interest due to their differences in physical and chemical stability and how that stability can affect cement hydration and strength when different CaCO 3 particles are added to a cementitious system [80]. Calcite, the most stable CaCO 3 polymorph, is characterized by its rhombohedral microstructure [85].…”

Section: Caco 3 and Sio 2 Biomineral Architectures Caco 3 Biomineral ...mentioning

confidence: 99%

“…Microorganisms can produce nanoscale CaCO 3 and SiO 2 , rendering these particles excellent candidates as reactive additives to cementitious systems [80]. The reactivity of these particles could be tailored by physically or genetically modulating the biomineralization process.…”

Section: Emerging Applications Opportunities and Challengesmentioning

confidence: 99%

Biomineralization in cement and concrete research

Dowdy,

Srubar

2024

RILEM Tech Lett

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Biomineralization refers to the biological processes through which living organisms produce minerals. In recent years, biomineralizing microorganisms have been used to stabilize soil or to impart a self-healing or self-sealing mechanism to damaged cement and concrete materials. However, applications of biominerals in cement and concrete research can extend far beyond these applications. This article focuses on the biomineralization of calcium carbonate (CaCO3) and silicon dioxide (SiO2) and their past, present, and future potential applications in cement and concrete research. First, we review the mechanisms of CaCO3 and SiO2 biomineralization and the micro- and macroorganisms involved in their production. Second, we showcase the wide array of biomineral architectures, with an explicit focus on CaCO3 polymorphs and SiO2 morphologies found in nature. Third, we briefly summarize previous applications of CaCO3 and SiO2 biomineralization in cement and concrete research. Finally, we discuss emerging applications of biominerals in cement and concrete research, including mineral admixtures or raw meal for portland cement production, as well as other applications that extend beyond self-healing.

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“…The produced calcium carbonates from such a process could be re-used in carbon utilization applications, especially within the context of the built environment. Recent studies have attempted to understand the processes and mechanisms that are the most important in the crystallization of CaCO 3 for carbon utilization [39,40] in addition to how these carbonates modify cement hydration [41] and rheology [42] when they are reincorporated as new built environment building blocks. Alternatively, if the carbonate materials are not re-utilized within industrial applications, they can be stored as thermodynamically stable CO 2 sinks underground (e.g., reclaimed mines) for deep and permanent sequestration.…”

Section: Carbon Capture Potentialmentioning

confidence: 99%

Assessment of Co-Gasification Methods for Hydrogen Production from Biomass and Plastic Wastes

Williams,

Bourtsalas

2023

Energies

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In recent decades, economic development and population growth has been accompanied by the generation of billions of tonnes of solid residues or municipal “wastes”, a substantial portion of which is composed of plastics and biomass materials. Combustion-based waste-to-energy is a viable and mature method of extracting calorific value from these end-of-life post-recyclable materials that are otherwise landfilled. However, alternative thermochemical methods, such as gasification, are becoming attractive due to the ability to synthesize chemical precursors for supply chain recirculation. Due to the infancy of gasification technology deployment, especially in the context of anthropogenic CO2 emission reduction, additional systems engineering studies are necessary. Herein, we conduct an attributional life cycle analysis to elucidate the syngas production and environmental impacts of advanced thermochemical gasification methods for the treatment of biomass and plastic wastes obtained from municipal solid wastes, using a comprehensive thermodynamic process model constructed in AspenTech. Feedstock composition, process parameters, and gasification methods are varied to study the effects on syngas quality, yield, power generation potential, and overall greenhouse gas emissions. Steam-based gasification presents up to 38% reductions in CO2 emissions when compared to conventional thermochemical methods. Using gasifier-active materials, such as metal hydroxides, can also further reduce CO2 emissions, and realizes a capture load of 1.75 tonnes of CO2 per tonne of plastic/stover feedstock. This design alteration has implications for reductions in CAPEX due to the mode of CO2 capture utilized (e.g., solid sorbent vs. liquid SELEXOL). The use of renewable energy to provide a method to generate steam for this process could make the environmental impact of such MSW gasification processes lower by between 60–75% tonnes of CO2 per tonne of H2. Overall, these results can be used to inform the guidance of advanced waste gasification methods as a low-carbon transition towards a circular economy.

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Hydration of cement pastes with calcium carbonate polymorphs

Cited by 47 publications

References 78 publications

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization

Biomineralization in cement and concrete research

Assessment of Co-Gasification Methods for Hydrogen Production from Biomass and Plastic Wastes

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Hydration of cement pastes with calcium carbonate polymorphs

Cited by 47 publications

References 78 publications

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO2 utilization

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO2 utilization

Biomineralization in cement and concrete research

Assessment of Co-Gasification Methods for Hydrogen Production from Biomass and Plastic Wastes

Contact Info

Product

Resources

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Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization

Directed synthesis of aragonite through semi-continuous seeded crystallization methods for CO₂ utilization