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Ettringite-based binder from ladle slag and gypsum – The effect of
The retardant effects of citric acid on the properties of ettringite binders are not yet fully understood. This investigation provides insights into the effects of citric acid on both the fresh and hardened state properties of the binder produced from …
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About us | Citribel | producer | supplier of citric acid
We go way back. To 1919, to be exact. Upon the solid foundation of the past, we build for the future as a trusted citric acid producer, mycelium supplier, and manufacturer of trisodium citrate and monosodium citrate. We balance …
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Optimization of strength and microstructural properties of building
Multiple additives are usually required to achieve better constructability for building gypsum-based materials. In this work, ternary contour was designed to determine the optimal proportions of Ca(OH) 2 (CH), PCEs and citric acid (CA) by comprehensive considerations of water requirement, setting time, fluidity, strength, temperature, hydration products and …
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(PDF) Sulfuric acid and citric acid attack of calcium …
Attack of sulfuric acid and citric acid on PC and CSA-based binders was evaluated with respect to mass loss, dimensional change, cumulative H⁺ ion neutralisation, strength loss, and changes in ...
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Techno-economic analysis and environmental impact assessment of citric
Environmental impacts of citric acid production in three scenarios are assessed using the life cycle assessment approach. Citric acid production with ion exchange recovery method is the most environment-friendly scenario. ... When 80% flue gas desulfurization gypsum and phosphogypsum (weight of magnesium oxide) were incorporated into MOCP, the ...
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Influence of citric acid on the fire behavior of gypsum …
ABSTRACT: To improve the workability in gypsum plasters, additives are sometimes used, including citric acid, which provides acceptable setting times for low w/g ratios, maximizing the …
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Role of Citric Acid in Delaying Gypsum Precipitation
The comprehension of the mechanisms of nucleation and growth that regulate the gypsum (calcium sulfate dihydrate) precipitation is fundamental to prevent scaling problems. The present paper reports measurements of the induction period for gypsum nucleation when citric acid is added in solution as an additive to retard scale formation. The supersaturation ratio was varied …
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The Effect of Recycled Citrogypsum as a …
The outcomes of this study demonstrate that recycled gypsum (RG) has environmental benefits in all assessed environmental impact categories when industrial gypsum waste (GW) was transported up to 50 km to the processing …
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Effect of citric acid on setting inhibition and mechanical properties
The main effect of citric acid is to hinder the growth of gypsum, by binding onto gypsum crystal faces [25]. Citric acid binding depends on the crystalline faces, which results in the same time in ...
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Insight into citric acid: A versatile organic acid
The citric acid (CA) is an organic acid with a global market value of USD 3.6 billion. Due to its non-toxic and biodegradable nature, it is widely used in the food industry and various other industries such as pharmaceutical, biomedical, textile, and leather industries. ... is the most traditionally used one but it generates a large amount of ...
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Recycling and disposal of gypsum-containing waste …
The cycle of citric acid production with the formation of gypsum-containing waste was considered and options for processing and utilization of citrogypsum were proposed.
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Influence of citric acid on the fire behavior of gypsum coatings of
The specimens were cured for 90 days in a laboratory environment (23±3 ºC y 55±10% HR). Before carrying out the tests, the specimens were kept in an oven at a temperature of 40 ºC until the mass was constant. ... However, in the gypsum with added citric acid, more prismatic shapes and a degree of amorphization of the crystalline framework ...
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Effect of Citric Acid on the Crystal Morphology of Gypsum and Its
Effects of citric acid on crystalline habit and crystal morphology of gypsum dihydrate were analyzed in great detail. The retarding mechanism of citric acid was also discussed from …
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Light plastering citric acid gypsum mortar
The invention belongs to the technical field of mortar, and particularly relates to light plastering citric acid gypsum mortar. A light plastering citric acid gypsum mortar is prepared by mixing citric acid gypsum powder, heavy calcium carbonate powder, river sand and vitrified micro-beads as an aggregate; the light plastering citric acid gypsum mortar is prepared by mixing the redispersible ...
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Effect of citric acid on properties of recycled gypsum plaster to
Desulfurized building gypsum (DBG) has great application potential and can be used to produce lightweight plastering gypsum (LPG). In this work, DBG was modified by …
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Effect of citric acid on properties of recycled gypsum plaster to
The related works used commercial gypsum plaster and the use of citric acid prevails (67%), and any work of this list used recycled gypsum plaster. Although great achievement has already been obtained in using retarders with gypsum plasters, topics about the properties and the problems caused by the gypsum waste recycling is still poorly ...
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Influence of citric acid on the fire behavior of gypsum coatings of
The fire had a greater effect on gypsum plasters containing citric acid as revealed by the cracking patterns and heat propagation profiles observed. Likewise, micro-cracks were observed in gypsum ...
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Acid transformation of bauxite residue: Conversion of its alkaline
Alkaline transformation appears to reduce the environmental risk of bauxite residue disposal areas (BRDAs) whilst potentially providing opportunities for the sustainable reuse and on-going management of BR. ... a combination of sulfuric acid and gypsum, citric acid, a hybrid of citric acid and gypsum. In this paper the following objectives were ...
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Effect of citric acid on setting inhibition and mechanical properties
The role of citric acid, a retarder additive used to prolong the workability and setting time of gypsum binders, was studied at concentrations of 0, 125, 250, 500, 1000, 1500 and 3000 ppm with a constant water/binder ratio.The hydration process (setting) was studied by the knife method, conductivity measurements and attenuated total reflectance infrared spectroscopy, …
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Neutralization of Industrial Alkali-Contaminated Soil by Different
Industrial soil is susceptible to acid or alkali pollution, but studies focused on the remediation of such soil are still limited. This manuscript investigated the neutralization effect of five agents (hydrochloric acid, citric acid, ferrous sulfate, calcium superphosphate and raw gypsum) to alkali polluted soil. The results showed that regarding the initial pH after the …
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Retardation of setting of plaster of Paris by organic acids
The simulations show that only in an alkaline environment is the crystal morphology of gypsum changed by retardation agents. The simulations provide a detailed description of retardation, for example, the specific mechanisms by which tartaric and citric acid retard setting of gypsum and how they differ. At high pH meso, D(-), and L(+) tartaric ...
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Application of the Industrial Byproduct Gypsum in Building
The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient. Due to the high number of impurities and production volume, the industrial byproduct gypsum is underutilized, leading to serious environmental problems. At present, only desulfurization gypsum and phosphogypsum …
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Hoang Nguyen
Ettringite-based binder from ladle slag and gypsum–The effect of citric acid on fresh and hardened state properties H Nguyen, P Kinnunen, K Gijbels, V Carvelli, H Sreenivasan, AM Kantola, ... Cement and Concrete Research 123, 105800, 2019
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Gypsum Crystallization in the Presence of Cr3+ and Citric Acid
Reactive crystallization of calcium sulfate dihydrate (gypsum) was investigated at pH 3.5 and 65 °C in the presence of citric acid and Cr3+ ions. Concentrations of both additives varied between 0 and 4000 ppm. The combined effect of additives on crystal size distributions, filtration characteristics, and crystal morphology were investigated and discussed.
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Phosphoric Acid vs. Citric Acid: A Comprehensive Comparison
Ultimately, the choice between phosphoric acid and citric acid depends on the specific application, safety requirements, and environmental considerations. For industrial and heavy-duty uses, phosphoric acid is often preferred, while citric acid remains the acid of choice for food, beverage, and applications.
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Effects of glutaric acid, tricarballylic acid and citric acid on the
DOI: 10.1016/j.jiec.2023.10.037 Corpus ID: 264452708; Effects of glutaric acid, tricarballylic acid and citric acid on the morphology of α-hemihydrate gypsum: Experimental and DFT simulation studies
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Improvement of alkaline electrochemical characteristics of …
School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, ... From the SEM examination, citric acid and gypsum treatments contributed to the reduction in IEP and redistribution of —OH groups on particle surfaces ...
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Processes
The liquid citric acid stream branches into a complex range of processes that reconnect, interconnect and influence one another at different stages. In the course of the separation, purification, crystallization, and drying processes, we produce potassium calcium salt, citrates, vinasse and gypsum materials.
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Effect of Citric Acid on the Crystal Morphology of Gypsum and its
Effects of citric acid on crystalline habit and crystal morphology of gypsum dihydrate were analyzed in great detail. The retarding mechanism of citric acid was also discussed from the standpoint of crystal growth by use of Scanning Electric Microscope and X-ray Photo Technology. The results shows that due to the complexion between citric acid and Ca2+, the initial …
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Inhibitory effect of novel green polymer (Aspartic-citric acid) on …
Citric acid monomer with presence of three active functional groups present overs its molecule can readily react with amines to form amides even in absence of any catalyst [17]. The mixture of aspartic and citric acid was thoroughly mixed and finely powdered using pestle and mortar before transferring it into a crucible bowl (Ceramic) [17 ...
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