Activation mechanisms of three types of industrial by …
Volume 288, 21 June 2021, 123111. Activation mechanisms of three types of industrial by-product gypsums on steel slag–granulated blast furnace slag-based binders. Chengwen …
Kinetics of gypsum dissolution in water | Geochemistry International
The kinetics of dissolution of different lithological varieties of gypsum was experimentally investigated at 5–25°C and P = 0.1 MPa, and a simple rate model was proposed on the basis of the sum of the rates of forward and backward reactions and proportionality to the activity product of calcium and sulfate ions. The activation energies …
Metals | Free Full-Text | Preparation and Characterization of …
To investigate the issues related to significant environmental damage and poor resource utilization of soda residue (SR), the composition and microstructure of hydration products of the GGBS (ground granulated blast-furnace slag) synergistically activated by NaOH-SR are characterized by an X-ray diffraction (XRD), Fourier-transform …
Physical and mechanical properties and micro
The diffraction peak intensity of Halite decreases compared with raw material soda residue (Fig. 1 d), which demonstrates that the soluble Ca 2+ and Na + from Calcite, Gypsum and Halite are participated in the hydration and polymerization reaction to form C S H, C-A-S H and N-A-S H gels. The left SR particles may be wrapped by those gel ...
Materials | Free Full-Text | Properties and Hydration …
Download keyboard_arrow_down. Browse Figures. Versions Notes. Abstract. Soda residue (SR), an industrial solid waste, pollutes the environment due to …
The kinetics of the precipitation of gypsum, CaSO4·2H2O
Uncontrolled gypsum precipitation can also cause hardships during reverse osmosis processes; this issue was also addressed in the literature [9, 41, 42]. Gypsum precipitation as a side-product during the neutralization of some wastewaters was also investigated [3, 43]. From these examples, one may conclude that the precipitation …
Gypsum – Hexametaphosphate activation on the hydraulic …
The hydraulic and related properties of Portland-slag cement containing granulated blast furnace slag as high as 40% (w/w) has been examined at room temperature under the mixed activation of gypsum and sodium hexametaphosphate. The study confirmed that the minor dosage of polyelectrolyte, hexametaphosphate with 4% …
Gypsum – Hexametaphosphate activation on the …
Parya et al.: Gypsum – Hexametaphosphate activation on the hydraulic behaviour of Portland-slag cement 1747 The major components of blast furnace slag are SiO 2, CaO, MgO, Fe 2O 3 and Al 2O 3 along with small alkali and SO 3 which are also common ingredients in silicate glasses. Moreover, quality coefficient (CaO + MgO + Al 2O 3)/ (SiO …
FLASH CALCINERS A focus on flash calcining
production), leading to the activation of alumina and silica oxides. It is important to note that a low calcination temperature will not activate the clay completely and an excessive calcination temperature can cause the recrystallisation of the clay structure. Both cases substantially decrease the reactivity of the clay.
Strength development and microstructure of recycled gypsum-soda …
In this regard, the geopolymer mixture containing 0%, 5%, 10% recycled gypsum and 60%, 70%, 80% soda residue by dry weight will be prepared as partly substitute for GGBS.
Autoclave‐Free Formation of α‐Hemihydrate Gypsum
The two steps included are to 1) produce CaSO4•2H2O (DH) using the discharged soda residues and H2SO4; 2) transform DH into a-gypsum in a mixed solution with additives at 368 K.
Strength development and microstructure of recycled gypsum-soda …
DOI: 10.1016/j.conbuildmat.2022.127312 Corpus ID: 247904241; Strength development and microstructure of recycled gypsum-soda residue-GGBS based geopolymer @article{An2022StrengthDA, title={Strength development and microstructure of recycled gypsum-soda residue-GGBS based geopolymer}, author={Qian An and Huimin …
Amelioration of soda saline-alkali soil through equidistant …
A field plot experiment was conducted to examine the effectiveness of equidistant slotting in combining with gypsum application on the amelioration of soda saline-alkali soil in the west Songnen Plain of Northeast China. Equidistant slotting at the soil depth 20-40 cm and 1 m apart could significantly decrease the degree of soil compaction within the slotted area, …
Activation of (Na, Ca)-bentonites with soda and MgO …
The activation with 2 4% soda is. traditionally used to process lower quality bentonites in the industry. Lebedenko and Plee (1988) observed that the Na+content was the most signi cant parameter enhancing the rheological properties. They fi explained that Mg2+ions were necessary to create better gel strength.
Analysis of Relationships Between Solid-State Properties, …
Materials. Procaine, procaine hydrochloride, and 2-napthalene sulfonic acid were purchased from Spectrum Chemicals (New Brunswick, NJ, USA). Phosphoric acid, para-toluenesulfonic acid, ethanesulfonic acid, methanesulfonic acid, oxalic acid, citric acid, formic acid, and sulfuric acid were supplied by Sigma-Aldrich Chemical Co. (St Louis, …
Amelioration of soda saline-alkali soil through
A field plot experiment was conducted to examine the effectiveness of equidistant slotting in combining with gypsum application on the amelioration of soda saline-alkali soil in the west Songnen ...
Laboratory Evaluation for Utilization of Phosphogypsum
Carbide slag was used as an activator to improve the activity of anhydrous phosphogypsum. Carbide slag could greatly improve the mechanical strength of anhydrous phosphogypsum than K2SO4. The compressive strength of 11 wt% carbide slag and 1 wt% K2SO4 activated anhydrous phosphogypsum increased greatly to 8.6 MPa at 3 d, and …
Preparation and characterization of an alkali …
Preparation and characterization of an alkali-activated cementitious material with blast-furnace slag, soda sludge, and industrial gypsum | Semantic Scholar. DOI: …
Synthesis and optimization of green one-part geopolymer …
Soda residue (SR) is produced from the ammonia-soda process of Na 2 CO 3 and contains large amounts of calcium components, such as CaCO 3, CaSO 4, Ca(OH) 2, and CaCl 2. The emission and storage of them have caused serious environmental problems such as land occupation, soil salinization, and underground water pollution …
Airsweep®
Uses vibration to shake material free. Air flows into a disc, which flaps and vibrates. Activation Radius. Effective radius of 4 feet. No specific activation area. Small activation radius. Material Control. Can be used with dry, wet, or sticky materials. Sticky material still builds up, even if bridging is controlled.
Green concrete with ground granulated blast-furnace slag …
DOI: 10.1016/j.jclepro.2020.122212 Corpus ID: 219427715; Green concrete with ground granulated blast-furnace slag activated by desulfurization gypsum and electric arc furnace reducing slag
Synergistic utilization of blast furnace slag with other …
Xu et al. (2021) investigated the impact of fluor gypsum (FG), desulfurization gypsum (DG) and desulfurization ash (DA) on SS-GBFS binders and activation mechanisms. As shown in Fig. 8, when the Ca 2+ and S O 4 2 − in gypsum were dissolved into the solution, they could react with A l O 4 5 − and generate ettringite.
Activation of (Na, Ca)-bentonites with soda and MgO and …
In soda activation, soda ash powder was added to the initially moisturized bentonite samples and kneaded till all the bentonite had reacted with soda. After soda addition and kneading, the activated samples were left to drying/curing under sunlight for a month to complete the activation process (Harvey and Lagaly, 2006).
Amelioration of soda saline-alkali soil through equidistant …
Abstract: A field plot experiment was conducted to examine the effectiveness of equidistant slotting in combining with gypsum application on the amelioration of soda saline-alkali soil in the west Songnen Plain of Northeast China. Equidistant slotting at the soil depth 20-40 cm and 1 m apart could significantly decrease the degree of soil compaction within the …
3 Ways to Activate Baking Soda
1. Combine with an Acid. One of the most common ways to activate baking soda is by mixing it with an acid. This reaction causes it to release carbon dioxide gas, which helps baked goods rise. For every one part baking soda, you may want to mix it with two parts acid to achieve this activation. Common acidifying agents include:
[Solved] Which one of the following salts does not contain …
The correct answer is Baking soda. Key Points. The total quantity of water molecules for one salt formula unit is frequently referred to as the water of crystallization. It is also referred to as hydration water. Baking soda, or sodium bicarbonate, has the chemical formula NaHCO 3. Its crystal structure does not contain any water molecules.
Activation mechanisms of three types of industrial by …
@article{Xu2021ActivationMO, title={Activation mechanisms of three types of industrial by-product gypsums on steel slag–granulated blast furnace slag-based binders}, author={Chengwen Xu and Wen Ni and Ke-qing Li and Siqi Zhang and Dong Xu}, journal={Construction and Building Materials}, year={2021}, volume={288}, …
Alkali-activated materials without commercial activators: a …
Zhao et al. conducted a study in which they blended 5% gypsum with SS powder to investigate the gelation properties of SS. The hydration process of the SS-gypsum mixture exhibited two exothermic peaks, resembling the behavior observed in cement hydration. ... (2020) Activation of blast furnace slag with soda production …
Activation mechanisms of three types of industrial by …
Activation mechanisms of three types of industrial by-product gypsums on steel slag–granulated blast furnace slag-based binders. Chengwen Xu, W. Ni, +2 …
Alkali Activated Cementitious Materials: An Overview
Activation of fly ash/cement systems using calcium sulfate anhydrite (CaSO4). Cement and Concrete Research, Vol. 31, Issue. 6, p. 873. CrossRef; ... Effect of addition of tire chips …
