Enhanced Polymer Induced Precipitation of Polymorphous in Calcium Carbonate: Calcite Aragonite Vaterite Phases

Siva, T.; Muralidharan, S.; Sathiyanarayanan, S.; Manikandan, E.; Jayachandran, M.

doi:10.1007/s10904-017-0520-1

Cited by 77 publications

(39 citation statements)

References 36 publications

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“…As for the third peak of mass loss between 700 and 800°C, this temperature range can be attributed to the de‐carbonation process of the carbonates, that is, calcite, vaterite and aragonite, which was due to the addition of CCP and the natural carbonation of OPC 50,52 . It should be noted that there existed a small band found in the temperature range of 600–700°C, which may be assigned to the slightly different decomposition temperature of aragonite, calcite and vaterite 53,54 . Finally, the CCP‐2.5 (14 and 28 days) exhibited the highest peak at a temperature range of 700 and 800°C among three CCP‐OPC pastes, indicating its largest quantity of the calcite in CCP‐2.5, which is in line with the previous studies, where the highest carbonation degree of CCP was accompanied by the largest amount of calcite with the greatest pressure adopted (i.e., 2.5 MPa).…”

Section: Resultsmentioning

confidence: 92%

Influences of CO₂‐cured cement powders on hydration of cement paste

et al. 2022

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Carbonated cement pastes (CCP) can be used as stable carbon storage. In this work, CCP were systematically investigated as supplementary cementitious materials (SCMs)-like components used in ordinary Portland cement (OPC) paste. The fully hydrated cement pastes were pulverized into powders and then exposed to different CO 2 pressure conditions (i.e., 1.0, 2.0 and 2.5 MPa) for 24 h. These CCP powders were then mixed with OPC to form a new binder. Various fresh, hardened and microstructural properties of CCP powders and the mixtures were investigated. Initial results show that the CO 2 sequestration level of CCP increased with the growth of CO 2 pressure, and albeit a pozzolanic reaction occurred inside the mixture, the relatively higher water demand due to the use of 30% replacement of CCP led to the inferior workability and compressive strength than the control group. Finally, a conceptual model relating to the CCP-OPC paste was proposed, facilitating the comprehension of the hydration behaviours of CCP-OPC paste.

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Section: Resultsmentioning

confidence: 92%

Influences of CO₂‐cured cement powders on hydration of cement paste

et al. 2022

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“…There will be 24 internal modes, eight of the ν 4 and ν 3 types, and four of the ν 2 and ν 1 types. The available experimental and theoretical data on vibration spectra of the carbonates under consideration are summarized in Supplementary Materials [ 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 ].…”

Section: Vibrational Spectramentioning

confidence: 99%

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Zhuravlev

Atuchin

2020

Nanomaterials

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Within the framework of the density functional theory (DFT) and the hybrid functional B3LYP by means of the CRYSTAL17 program code, the wavenumbers and intensities of normal oscillations of MgCO3, CaCO3, ZnCO3, CdCO3 in the structure of calcite; CaMg(CO3)2, CdMg(CO3)2, CaMn(CO3)2, CaZn(CO3)2 in the structure of dolomite; BaMg(CO3)2 in the structure of the norsethite type; and CaCO3, SrCO3, BaCO3, and PbCO3 in the structure of aragonite were calculated. Infrared absorption and Raman spectra were compared with the known experimental data of synthetic and natural crystals. For lattice and intramolecular modes, linear dependences on the radius and mass of the metal cation are established. The obtained dependences have predictive power and can be used to study solid carbonate solutions. For trigonal and orthorhombic carbonates, the linear dependence of wavenumbers on the cation radius RM (or M–O distance) is established for the infrared in-plane bending mode: 786.2–65.88·RM and Raman in-plane stretching mode: 768.5–53.24·RM, with a correlation coefficient of 0.87.

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“…The second loss was observed only for the sample with surfactin and had a broad DTG peak with maximum about 510 °C ( Figure 4 B). From the literature, it is known that the first weight loss is related to the evaporation of moisture contained in the samples, and the second weight loss is related to the evaporation of water bound in the CaCO 3 structure and/or transformation of vaterite to calcite [ 32 , 33 ]. To compare the chemical composition of the sample with and without surfactin, the weight loss observed during this two recesses was determined.…”

Section: Resultsmentioning

confidence: 99%

Surfactin as a Green Agent Controlling the Growth of Porous Calcite Microstructures

Bastrzyk

Fiedot‐Toboła

Maniak

et al. 2020

IJMS

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This study presents a new, simple way to obtain mesoporous calcite structures via a green method using an eco-friendly surface-active compound, surfactin, as a controlling agent. The effects of synthesis time and surfactin concentration were investigated. The obtained structures were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC) coupled with gas mass spectrometry (QMS) analysis. The experimental data showed that surfactin molecules significantly changed the morphology of the calcite crystals, roughening and deforming the surface and creating a greater specific surface area, even at low biosurfactant concentrations (10 ppm). The size of the crystals was reduced, and the zeta potential value of calcium carbonate was more negative when more biosurfactant was added. The XRD data revealed that the biomolecules were incorporated into the crystals and slowed the transformation of vaterite into calcite. It has been shown that as long as vaterite is present in the medium, the calcite surface will be less deformed. The strong influence of surfactin molecules on the crystal growth of calcium carbonate was due to the interaction of surfactin molecules with free calcium ions in the solution as well as the biomolecules adsorption at the formed crystal surface. The role of micelles in crystal growth was examined, and the mechanism of mesoporous calcium carbonate formation was presented.

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Enhanced Polymer Induced Precipitation of Polymorphous in Calcium Carbonate: Calcite Aragonite Vaterite Phases

Cited by 77 publications

References 36 publications

Influences of CO₂‐cured cement powders on hydration of cement paste

Influences of CO₂‐cured cement powders on hydration of cement paste

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Surfactin as a Green Agent Controlling the Growth of Porous Calcite Microstructures

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Enhanced Polymer Induced Precipitation of Polymorphous in Calcium Carbonate: Calcite Aragonite Vaterite Phases

Cited by 77 publications

References 36 publications

Influences of CO2‐cured cement powders on hydration of cement paste

Influences of CO2‐cured cement powders on hydration of cement paste

Comprehensive Density Functional Theory Studies of Vibrational Spectra of Carbonates

Surfactin as a Green Agent Controlling the Growth of Porous Calcite Microstructures

Contact Info

Product

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Influences of CO₂‐cured cement powders on hydration of cement paste

Influences of CO₂‐cured cement powders on hydration of cement paste