Gaurav Sant
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View article: Radiation damages the silicates present in polyphasic mineral aggregates causing concrete’s degradation
Radiation damages the silicates present in polyphasic mineral aggregates causing concrete’s degradation Open
While many U.S. nuclear power plants have submitted Subsequent License Renewal Application to operate beyond 60 years, others are already considering Operations Beyond Eighty years. In such cases, concrete biological shields are exposed to…
View article: Using boron as a tracer reveals how surface precipitates inhibit silicate dissolution in hyperalkaline solutions during alkali–silica reaction
Using boron as a tracer reveals how surface precipitates inhibit silicate dissolution in hyperalkaline solutions during alkali–silica reaction Open
Silicate dissolution under hyperalkaline conditions is a key process that affects the evolution of alkali–silica reaction (ASR) in concrete. In these environments, dissolution may involve multiple overlapping processes—including ion adsorp…
View article: Towards decarbonization of cement industry: a critical review of electrification technologies for sustainable cement production
Towards decarbonization of cement industry: a critical review of electrification technologies for sustainable cement production Open
Cement production accounts for 8% of global CO2 emissions, necessitating its deep decarbonization. This paper reviews: (i) electrolysis-based methods to produce cement precursors, and (ii) electrified process heat technologies, along with …
View article: Isopropanol Mediates the Rapid and Selective Synthesis of Vaterite during Ambient Carbonation
Isopropanol Mediates the Rapid and Selective Synthesis of Vaterite during Ambient Carbonation Open
Vaterite is a metastable polymorph of calcium carbonate (CaCO3) that can be controllably transformed into aragonite or calcite (i.e., stable CaCO3 polymorphs) - via a dissolution-precipitation pathway - thereby enabli…
View article: Enabling carbon dioxide mineralization and active set control in portlandite-based cementitious suspensions
Enabling carbon dioxide mineralization and active set control in portlandite-based cementitious suspensions Open
View article: Seawater electrolysis enables Mg(OH)<sub>2</sub> production and CO<sub>2</sub> mineralization
Seawater electrolysis enables Mg(OH)<sub>2</sub> production and CO<sub>2</sub> mineralization Open
A method for producing one or more hydroxide solids includes providing a catholyte comprising an electrolyte solution; contacting the catholyte with an electroactive mesh cathode to electrolytically generate hydroxide ions, thereby precipi…
View article: CO 2 mineralization in produced and industrial effluent water by pH-swing carbonation
CO 2 mineralization in produced and industrial effluent water by pH-swing carbonation Open
Effluent water is combined with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution. The pH of the reaction solution is controlled to induce precipitation of a carbonate salt from the reac…
View article: Formulations and processing of cementitious components to meet target strength and CO<sub>2</sub> uptake criteria
Formulations and processing of cementitious components to meet target strength and CO<sub>2</sub> uptake criteria Open
Provided herein are compositions and methods of carbonation processing for the fabrication of cementitious materials and concrete products. Embodiments include manufacturing processes of a low-carbon concrete product comprising: forming a …
View article: Effects of Gypsum and Limestone on Early-Age Hydration and Strength Optimization in Belite Calcium Sulfoaluminate Cement
Effects of Gypsum and Limestone on Early-Age Hydration and Strength Optimization in Belite Calcium Sulfoaluminate Cement Open
Belite calcium sulfoaluminate cement (CSAB), an alternative to Portland cement, exhibits excellent strength at both early and later ages. However, due to its high belite content, the carbon reduction from this type of cement is not suffici…
View article: A dual binder concept for 3D printing ink: Triggered polymerization for rapid stiffening and carbonation for final strength
A dual binder concept for 3D printing ink: Triggered polymerization for rapid stiffening and carbonation for final strength Open
Additive manufacturing or 3D printing of polymeric materials is facilitated by sharp fluid-to-solid transition mechanisms. In contrast to polymeric materials, controlling the fluid-to-solid transition of suspensions based on reactive inorg…
View article: Reactive carbon capture using saline water: evaluation of prospective sources, processes, and products
Reactive carbon capture using saline water: evaluation of prospective sources, processes, and products Open
This review synthesizes the state of development of saline water-based reactive carbon capture, assessing how sources, processes, and products impact viability.
View article: ZeroCAL: Eliminating Carbon Dioxide Emissions from Limestone’s Decomposition to Decarbonize Cement Production
ZeroCAL: Eliminating Carbon Dioxide Emissions from Limestone’s Decomposition to Decarbonize Cement Production Open
Limestone (calcite, CaCO3) is an abundant and cost-effective source of calcium oxide (CaO) for cement and lime production. However, the thermochemical decomposition of limestone (∼800 °C, 1 bar) to produce lime (CaO) results in …
View article: Microstructurally resolved electrochemical evolution of mechanical- and irradiation-induced damage in nuclear alloys
Microstructurally resolved electrochemical evolution of mechanical- and irradiation-induced damage in nuclear alloys Open
There is a need for high-throughput, scale-relevant, and direct electrochemical analysis to understand the corrosion behavior and sensitivity of nuclear materials that are exposed to extreme (high pressure, temperature, and radiation expos…
View article: Investigation of Carbonation Kinetics in Carbonated Cementitious Materials by Reactive Molecular Dynamics Simulations
Investigation of Carbonation Kinetics in Carbonated Cementitious Materials by Reactive Molecular Dynamics Simulations Open
Calcium carbonate (CaCO3) precipitation plays a significant role during the carbon capture process; however, the mechanism is still only partially understood. Understanding the atomic-level carbonation mechanism of cementitious …
View article: Analyzing the upscaling potential and geospatial siting of calcination-free calcium hydroxide production in the United States
Analyzing the upscaling potential and geospatial siting of calcination-free calcium hydroxide production in the United States Open
View article: Ion Exchange Processes for CO <sub>2</sub> Mineralization Using Industrial Waste Streams: Pilot Plant Demonstration and Life Cycle Assessment
Ion Exchange Processes for CO <sub>2</sub> Mineralization Using Industrial Waste Streams: Pilot Plant Demonstration and Life Cycle Assessment Open
An attractive technique for removing CO 2 from the environment is sequestration within stable carbonate solids (e. g., calcite). However, continuous addition of alkalinity is required to achieve favorable conditions for carbonate precipita…
View article: Buffer-free process cycle for CO<sub>2</sub> sequestration and carbonate production from brine waste streams with high salinity
Buffer-free process cycle for CO<sub>2</sub> sequestration and carbonate production from brine waste streams with high salinity Open
A method includes: (1) using a chelating agent, extracting divalent ions from a brine solution as complexes of the chelating agent and the divalent ions; (2) using a weak acid, regenerating the chelating agent and producing a divalent ion …
View article: Process modeling guides operational variables that affect <scp>CO<sub>2</sub></scp> utilization during the accelerated carbonation of concrete
Process modeling guides operational variables that affect <span>CO<sub>2</sub></span> utilization during the accelerated carbonation of concrete Open
Accelerated concrete carbonation is an expanding option for decarbonizing construction. Factors such as concrete mixture design and carbonation environment can influence the maximum CO 2 utilization that can be achieved during such a proce…
View article: High-Strength Organic–Inorganic Composites with Superior Thermal Insulation and Acoustic Attenuation
High-Strength Organic–Inorganic Composites with Superior Thermal Insulation and Acoustic Attenuation Open
We demonstrate facile fabrication of highly filled, lightweight organic-inorganic composites comprising polyurethanes covalently linked with naturally occurring clinoptilolite microparticles. These polyurethane/clinoptilolite (PUC) composi…
View article: Deciphering the Effects of Gypsum and Limestone on Hydration and Strength of Belite Calcium Sulfoaluminate Cement
Deciphering the Effects of Gypsum and Limestone on Hydration and Strength of Belite Calcium Sulfoaluminate Cement Open
View article: A Dual Binder Concept for 3d Printing: Triggered Polymerization for Rapid Stiffening and Carbonation for Final Strength
A Dual Binder Concept for 3d Printing: Triggered Polymerization for Rapid Stiffening and Carbonation for Final Strength Open
View article: Deciphering the Effects of Gypsum and Limestone on Hydration and Strength of Belite Calcium Sulfoaluminate Cement
Deciphering the Effects of Gypsum and Limestone on Hydration and Strength of Belite Calcium Sulfoaluminate Cement Open
View article: Investigation of a hybrid binder system for large scale 3D printing
Investigation of a hybrid binder system for large scale 3D printing Open
Large‐scale additive manufacturing of reactive suspensions, such as concrete, is being developed to freely create objects without the constraints of a formwork. One challenge in printing suspensions is the precise spatio‐temporal control o…
View article: Facile, low-energy routes for the production of hydrated calcium and magnesium salts from alkaline industrial wastes
Facile, low-energy routes for the production of hydrated calcium and magnesium salts from alkaline industrial wastes Open
Divalent ions are extracted from solids by leaching to form a divalent ion-containing solution. The divalent ion-containing solution is subjected to concentration to form a concentrated divalent ion-containing solution. Precipitation of a …
View article: Fly ash degree of reaction in hypersaline NaCl and CaCl2 brines: Effects of calcium-based additives
Fly ash degree of reaction in hypersaline NaCl and CaCl2 brines: Effects of calcium-based additives Open
The pozzolanic reaction of fly ashes with calcium-based additives can be effectively used to solidify and chemically stabilize (S&S process) highly concentrated brines inside a cementitious matrix. However, complex interactions between the…
View article: Electrolytic Seawater Mineralization and the Mass Balances That Demonstrate Carbon Dioxide Removal
Electrolytic Seawater Mineralization and the Mass Balances That Demonstrate Carbon Dioxide Removal Open
We present the mass balances associated with carbon dioxide (CO2) removal (CDR) using seawater as both the source of reactants and as the reaction medium via electrolysis following the "Equatic" (formerly known as "Sea…
View article: Alkaline cation enrichment and water electrolysis to provide CO<sub>2</sub> mineralization and global-scale carbon management
Alkaline cation enrichment and water electrolysis to provide CO<sub>2</sub> mineralization and global-scale carbon management Open
Provided herein are methods of removing carbon dioxide from an aqueous stream or gaseous stream by: contacting the gaseous stream comprising carbon dioxide, when present, with an aqueous solution comprising ions capable of forming an insol…
View article: Formulations and processing of cementitious components to meet target strength and CO2 uptake criteria
Formulations and processing of cementitious components to meet target strength and CO2 uptake criteria Open
Provided herein are compositions and methods of carbonation processing for the fabrication of cementitious materials and concrete products. Embodiments include manufacturing processes of a low-carbon concrete product comprising: forming a …
View article: CO<sub>2</sub> mineralization in produced and industrial effluent water by pH-swing carbonation
CO<sub>2</sub> mineralization in produced and industrial effluent water by pH-swing carbonation Open
Effluent water is combined with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution. The pH of the reaction solution is controlled to induce precipitation of a carbonate salt from the reac…
View article: Mitigation of alkali-silica reaction in concrete using readily-soluble chemical additives
Mitigation of alkali-silica reaction in concrete using readily-soluble chemical additives Open
A manufacturing method includes: (1) incorporating at least one soluble, calcium, magnesium, or other divalent cation-containing additive into a concrete mixture including aggregates prone to alkali-silica reaction; and (2) curing the conc…