The Experts below are selected from a list of 22521 Experts worldwide ranked by ideXlab platform
Narayanan Neithalath - One of the best experts on this subject based on the ideXlab platform.
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reaction kinetics in Sodium Silicate powder and liquid activated slag binders evaluated using isothermal calorimetry
Thermochimica Acta, 2012Co-Authors: Deepak Ravikumar, Narayanan NeithalathAbstract:The kinetics of alkali activation of slag is highly dependent on the activator type and its chemical constitution. This paper explores the early-age reaction kinetics of slag activated using powder Sodium Silicate (which makes handling easier in practice) and compares it with that of waterglass (liquid Sodium Silicate) activated slag pastes. The influence of Na2O-to-slag ratio and the activator modulus (SiO2-to-Na2O ratio) on the isothermal calorimetric response is presented. The powder Sodium Silicate activated slag pastes show a calorimetric response similar to NaOH activated slag systems, with both demonstrating single early-age reaction peaks. In contrast, the waterglass activated systems show a calorimetric response similar to those of OPC pastes, with a marked induction period. Kinetic modeling is used to quantify the differences in reaction kinetics. Jander equation is used to model the time-dependent degree of reaction and to relate it to the rate controlling processes when different types of activators are used.
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Reaction kinetics in Sodium Silicate powder and liquid activated slag binders evaluated using isothermal calorimetry
Thermochimica Acta, 2012Co-Authors: Deepak Ravikumar, Narayanan NeithalathAbstract:The kinetics of alkali activation of slag is highly dependent on the activator type and its chemical constitution. This paper explores the early-age reaction kinetics of slag activated using powder Sodium Silicate (which makes handling easier in practice) and compares it with that of waterglass (liquid Sodium Silicate) activated slag pastes. The influence of Na 2O-to-slag ratio and the activator modulus (SiO 2-to-Na 2O ratio) on the isothermal calorimetric response is presented. The powder Sodium Silicate activated slag pastes show a calorimetric response similar to NaOH activated slag systems, with both demonstrating single early-age reaction peaks. In contrast, the waterglass activated systems show a calorimetric response similar to those of OPC pastes, with a marked induction period. Kinetic modeling is used to quantify the differences in reaction kinetics. Jander equation is used to model the time-dependent degree of reaction and to relate it to the rate controlling processes when different types of activators are used. © 2012 Elsevier B.V. All rights reserved.
Deepak Ravikumar - One of the best experts on this subject based on the ideXlab platform.
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reaction kinetics in Sodium Silicate powder and liquid activated slag binders evaluated using isothermal calorimetry
Thermochimica Acta, 2012Co-Authors: Deepak Ravikumar, Narayanan NeithalathAbstract:The kinetics of alkali activation of slag is highly dependent on the activator type and its chemical constitution. This paper explores the early-age reaction kinetics of slag activated using powder Sodium Silicate (which makes handling easier in practice) and compares it with that of waterglass (liquid Sodium Silicate) activated slag pastes. The influence of Na2O-to-slag ratio and the activator modulus (SiO2-to-Na2O ratio) on the isothermal calorimetric response is presented. The powder Sodium Silicate activated slag pastes show a calorimetric response similar to NaOH activated slag systems, with both demonstrating single early-age reaction peaks. In contrast, the waterglass activated systems show a calorimetric response similar to those of OPC pastes, with a marked induction period. Kinetic modeling is used to quantify the differences in reaction kinetics. Jander equation is used to model the time-dependent degree of reaction and to relate it to the rate controlling processes when different types of activators are used.
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Reaction kinetics in Sodium Silicate powder and liquid activated slag binders evaluated using isothermal calorimetry
Thermochimica Acta, 2012Co-Authors: Deepak Ravikumar, Narayanan NeithalathAbstract:The kinetics of alkali activation of slag is highly dependent on the activator type and its chemical constitution. This paper explores the early-age reaction kinetics of slag activated using powder Sodium Silicate (which makes handling easier in practice) and compares it with that of waterglass (liquid Sodium Silicate) activated slag pastes. The influence of Na 2O-to-slag ratio and the activator modulus (SiO 2-to-Na 2O ratio) on the isothermal calorimetric response is presented. The powder Sodium Silicate activated slag pastes show a calorimetric response similar to NaOH activated slag systems, with both demonstrating single early-age reaction peaks. In contrast, the waterglass activated systems show a calorimetric response similar to those of OPC pastes, with a marked induction period. Kinetic modeling is used to quantify the differences in reaction kinetics. Jander equation is used to model the time-dependent degree of reaction and to relate it to the rate controlling processes when different types of activators are used. © 2012 Elsevier B.V. All rights reserved.
Xiong Xiao-qing - One of the best experts on this subject based on the ideXlab platform.
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Study on the Transferred Coating of Sodium Silicate Sand
Hot Working Technology, 2020Co-Authors: Xiong Xiao-qingAbstract:The optimum composition with high strength of the transferred coating is presented,with the Sodium Silicate and the composite zircon powder,and the transition mold between the Sodium Silicate sand and transferred coat is presented.The new technical method is presented to advance the interfacial adhesive force and the occlusive extent of different sand system.The key question of the transferred coating of Sodium Silicate sand is solved.
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A Study on the Transferred Coating of Sodium Silicate Sand
Journal of Jiaxing University, 2020Co-Authors: Xiong Xiao-qingAbstract:The optimum composition with high strength of the transferred coating is produced with the Sodium Silicate and the composite zircon powder.With regard to the weak adhesion problem,this paper suggests filling thick transition sand between the Sodium Silicate sand and transferred coat,so as to improve the interface adhesion and occlusion between different systems of sand and solve the key problem of the transferred coating of Sodium Silicate sand.
Yang Bi - One of the best experts on this subject based on the ideXlab platform.
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Use of silicon oxide and Sodium Silicate for controlling Trichothecium roseum postharvest rot in Chinese cantaloupe (Cucumis melo L.)
International Journal of Food Science and Technology, 2007Co-Authors: Jian Zhao, Yang BiAbstract:Summary Silicon oxide and Sodium Silicate were investigated as potential agents for the control of postharvest pink rot in Chinese cantaloupe (cultivar Yujingxing) caused by Trichothecium roseum. In vitro tests showed that Sodium Silicate, when added to potato dextrose agar, was effective in suppressing the radial growth of the pathogen on the medium, whereas silicon oxide was ineffective. The effectiveness of Sodium Silicate increased with concentration, and the growth of the fungus was completely inhibited at 100 mm. When melons were dipped in the solutions, both silicon oxide and Sodium Silicate significantly (P
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use of silicon oxide and Sodium Silicate for controlling trichothecium roseum postharvest rot in chinese cantaloupe cucumis melo l
International Journal of Food Science and Technology, 2007Co-Authors: Jian Zhao, Yang BiAbstract:Summary Silicon oxide and Sodium Silicate were investigated as potential agents for the control of postharvest pink rot in Chinese cantaloupe (cultivar Yujingxing) caused by Trichothecium roseum. In vitro tests showed that Sodium Silicate, when added to potato dextrose agar, was effective in suppressing the radial growth of the pathogen on the medium, whereas silicon oxide was ineffective. The effectiveness of Sodium Silicate increased with concentration, and the growth of the fungus was completely inhibited at 100 mm. When melons were dipped in the solutions, both silicon oxide and Sodium Silicate significantly (P < 0.01) reduced the severity of pink rot of the cantaloupe with lesion diameters reduced by up to fivefold when compared with the controls. Scanning electron microscopy-energy dispersive X-ray analysis showed that silicon (Si)-treated melons had a smoother surface feature and higher Si levels in the epidermis, especially at the stomata and along the junction between the exocarp and mesocarp. Enhanced peroxidase and phenylalanine ammonia lyase activities were observed in Sodium-Silicate-treated melons but not in those treated with silicon oxide. The results indicate that different mechanisms might be involved in Sodium Silicate and silicon-oxide-initiated reduction of postharvest pink rot in Chinese cantaloupe.
Cristina Leonelli - One of the best experts on this subject based on the ideXlab platform.
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substitution of Sodium Silicate with rice husk ash naoh solution in metakaolin based geopolymer cement concerning reduction in global warming
Journal of Cleaner Production, 2017Co-Authors: Elie Kamseu, L Beleuk M A Moungam, Maria Cannio, Ndigui Billong, Duangrudee Chaysuwan, Chinje U Melo, Cristina LeonelliAbstract:Abstract Rice husk ash (RHA), a by-product from the rice industry, was used as principal source of amorphous silica for the production of Sodium Silicate solution (MR ∼ 3) used for the replacement of standard commercial Sodium Silicate in the mix-design of metakaolin based geopolymer composites. Three initial concentrations of NaOH were considered (8, 10 and 12 M) with the aim to investigate on the optimum dissolution and formation of silica oligomers capable to act as binder during the geopolymerization. Results (FT-IR and XRD) showed that RHA-NaOH Sodium Silicate solutions have characteristics similar to that of standard commercial Sodium Silicate and the residual carbonates present in the viscous pastes can be monitored during the preparation of geopolymers using the mix-design. Combined 25 vol% standard Sodium Silicate solution with ∼75 vol% of RHA-NaOH based Sodium Silicate solution conducted to good polycondensation, densification, high flexural strength (∼8 MPa) and low porosity similar to that of the standard matrix of metakaolin based composites. The new approach is found promising for the significant reduction of the Global Warming Potential of Geopolymers.
