1H, 29Si, and 27Al MAS NMR as a Tool to Characterize Volcanic Tuffs and Assess Their Suitability for Industrial Applications

Ciccioli, Piero; Plescia, P.; Capitani, Donatella

doi:10.1021/jp103082h

Cited by 12 publications

(4 citation statements)

References 59 publications

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“…Portland cement (Camilleri et al, 2012;Chintalapudi and Pannem, 2020;Llanes et al, 2018;Maheswaran et al, 2016;Oliveira et al, 2020;Sanjuán et al, 2015;Santos et al, 2020;Silva et al, 2023;Singhal et al, 2008;Souza et al, 2017;Taefi et al, 2010;Thapa et al, 2019;Trapote-Barreira et al, 2016;Trusilewicz et al, 2019;Vescovi et al, 2023;Wattanasiriwech et al, 2009;Yang et al, 2014;Zhu et al, 2015), tuff from various references (Al-Harahsheh et al, 2014;Al-Zboon et al, 2016;Ciccioli et al, 2010;Khataee et al, 2018;Kundal et al, 2022;Yu et al, 2023)…”

Section: Reaction Kinetics and Strengthening Mechanismsmentioning

confidence: 99%

Factors Influencing the Mechanical Properties and Reaction Kinetics of Wasted Ultrabasic Tuff Used as a Binder

Zhang,

Hou,

Cui

et al. 2024

Preprint

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Ultrabasic tuff powder, a solid waste generated from manufactured sand and aggregate production without calcination treatment, contains less than 45% SiO2 stabilized in aluminosilicate. Due to its high crystallinity, few studies have explored its viability as a raw material for binder preparation. Using an orthogonal experimental design, this study revealed the impacts of three key factors on the mechanical properties of ultrabasic tuff-based binder (UTB): the mass ratio of silica to alumina (S/A), the mass ratio of sodium oxide (Na2O) to binders (N/B), and curing temperature (T). To elucidate the reaction kinetics, an array of analytical techniques, including Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES), X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Energy-dispersive X-ray spectroscopy (EDS), were employed. The results indicate that an increase in S/A and T enhanced the dissolution degree of precursors, along with improved compressive strengths. Conversely, an increase in N/B led to a minimal reduction in the dissolution degree, with compressive strengths initially rising and then declining. The optimal combination of three factors was S/A = 5, N/B = 0.10, and T = 80°C, resulting in a maximum compressive strength exceeding 80.0 MPa. The ratio of dissolved silicon (Si) to aluminum (Al) was approximately 50:1, signifying a composition profoundly different from traditional alkali-activated binders. Additionally, the proportions of dissolved silica (SiO2) and alumina (Al2O3) were determined to be 46.38% and 4.48% of the total, respectively, suggesting that UTB comprised both reactive and unreactive components. The reactive portion, consisting of quartz, calcite, chlorite, and silica fume, forms an amorphous (N, C)-A-S-H gel, connecting with the unreactive part.

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Section: Reaction Kinetics and Strengthening Mechanismsmentioning

confidence: 99%

Factors Influencing the Mechanical Properties and Reaction Kinetics of Wasted Ultrabasic Tuff Used as a Binder

Zhang,

Hou,

Cui

et al. 2024

Preprint

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“…A lithified tuff cemented by zeolites (TRSN) with a Si/Al of 2.45, and a SSA 5 m 2 g −1 , and a vitric tuff cemented by glass (PTV), with a Si/Al 3.3 and a SSA of 1.75 m 2 g −1 were selected as test materials. Details on their origin, petrographic features, and practical applications can be found in [18], together with the average oxide composition and other features, including the spectroscopic ones. Figure 18.5 highlights well the differences between the two tuffs.…”

Section: Geopolymers From Activated Tuffs and Activated Rock Mixturesmentioning

confidence: 99%

Mechano-Chemistry of Rock Materials for the Industrial Production of New Geopolymeric Cements

Ciccioli

Capitani

Gualtieri

et al. 2019

Factories of the Future

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The reduction of CO 2 emission from cement industry represents a priority task in the roadmap defined for the year 2020 by the European Union (EU) Commission for a resource efficient Europe. Several research projects have been undertaken aimed at developing non-hazardous materials as partial substitute of clinker in cement formulations, but also new, low-carbon, cements fully replacing clinker. Among the new cementing materials, Si-Al geopolymers seem the most promising, in terms of CO 2 emission and mechanical and thermal properties. In this chapter, mechanochemical processing of kaolin clays to produce metakaolin (MKA) for the synthesis of Si-Al geopolymers is proposed as an alternative process to replace thermal treatments performed at 650-850°C. Results obtained show that the mechano-chemical process is also suitable to make low cost blended Si-Al geopolymers where 40% of MKA is replaced by mechano-chemically activated volcanic tuffs. The compatibility of mechano-chemistry with industrial production was investigated by building a prototype milling system that was tested in a small industrial facility producing zeolites from industrial wastes. The degree of automation allowed the prototype to work unattended for 10 months. Based on the results obtained from these tests, a milling system for a full scale production of mechano-chemically activated rock materials was designed, and its performances analysed.

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“…Tuffs are formed from pyroclastic flow, surge and fall deposits that combined with the primitive magma features, the deposition and compaction of the emitted material and the post depositional processes concur to find tuffs with different textures, and petrographic and chemical compositions [20].…”

Section: Introductionmentioning

confidence: 99%

Photon Shielding Features of Quarry Tuff

et al. 2017

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Abstract. Cantera is a quarry tuff widely used in the building industry; in this work the shielding features of cantera were determined. The shielding characteristics were calculated using XCOM and MCNP5 codes for 0.03, 0.07, 0.1, 0.3, 0.662, 1, 2, and 3 MeV photons. With XCOM the mass interaction coefficients, and the total mass attenuation coefficients, were calculated. With the MCNP5 code a transmission experiment was modelled using a point-like source located 42 cm apart from a point-like detector. Between the source and the detector, cantera pieces with different thickness, ranging from 0 to 40 cm were included. The collided and uncollided photon fluence, the Kerma in air and the Ambient dose equivalent were estimated. With the uncollided fluence the linear attenuation coefficients were determined and compared with those calculated with XCOM. The linear attenuation coefficient for 0.662 MeV photons was compared with the coefficient measured with a NaI(Tl)-based J-ray spectrometer and a 137 Cs source.

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¹H, ²⁹Si, and ²⁷Al MAS NMR as a Tool to Characterize Volcanic Tuffs and Assess Their Suitability for Industrial Applications

Cited by 12 publications

References 59 publications

Factors Influencing the Mechanical Properties and Reaction Kinetics of Wasted Ultrabasic Tuff Used as a Binder

Factors Influencing the Mechanical Properties and Reaction Kinetics of Wasted Ultrabasic Tuff Used as a Binder

Mechano-Chemistry of Rock Materials for the Industrial Production of New Geopolymeric Cements

Photon Shielding Features of Quarry Tuff

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