Properties and microstructure of CO2 activated binder produced by recycling phosphorous slag

Yang, Qing; Li, Chen; Ren, Qiang; Jiang, Zhengwu

doi:10.1016/j.conbuildmat.2021.122698

Cited by 19 publications

(4 citation statements)

References 54 publications

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“…To a shift in the equilibrium of the polycondensation reaction to the right, i.e. to increase the degree of cure [34][35][36]. Indeed, as follows from Figure 4.…”

Section: Resultsmentioning

confidence: 99%

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Development of Mineral Fillers for Acid Resistant Filling Composites

Akhmetova

2024

Preprint

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The article presents the results of research on the production of effective inorganic fillers and chemically resistant composite polymer-mineral materials based on industrial waste. The aim of the work is to develop the technological foundations for the production of inorganic fillers and highly filled filling compositions for use in chlorine-containing media. Materials with high resistance to hydrochloric acid are graphite and quartz sand. Thermal power plant (TPP) ash was used as an acid-resistant filler in the compositions. The simplex lattice planning method was used to determine the areas of compositions with the best properties. Two components were selected: formaldehyde rubber resin and mineral filler (TPP ash) as a binder. As the third component, hydrolytically active fillers were used - anhydrite, phosphogypsum and phosphorus production slag. A preliminary operation was performed to remove hygroscopic moisture from the filler.The influence of the nature of mineral fillers on the chemical stability and durability of the obtained composites is investigated. The nature of the interaction of mineral fillers with a polymer binder was determined, and chemical interaction of the hydroxyl groups of the filler and the methyl groups of the polymer took place. The mathematical planning method was used to optimize the chemical resistance and durability of the compositions of the studied substances. Based on the results of this study, optimal compositions of compositions, anhydrite, phosphogypsum and phosphoric slag were selected. These composites, with the highest possible degree of filling, have high target characteristics.

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“…To a shift in the equilibrium of the polycondensation reaction to the right, i.e. to increase the degree of cure [34][35][36]. Indeed, as follows from Figure 4.…”

Section: Resultsmentioning

confidence: 99%

“…Fillers are mixtures of various substances, with the exception of anhydrite, which is a monomineral slow-setting gypsum binder (CaSO4) [27]. The use of anhydrite along with phosphogypsum, as well as phosphoric resins and ash from TPP, expands the ability to control the speed and depth of curing of the binder [33,34].…”

Section: Methodsmentioning

confidence: 99%

Development of Mineral Fillers for Acid Resistant Filling Composites

Akhmetova

2024

Preprint

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“…For these reasons, the disposal of solid waste with less carbon footprint draws more attention in both academia and engineering applications. It cannot only achieve the adequate utilization of solid waste and reduce the environmental repercussions but even have certain improvements in performing of the final products [ 23 – 26 ]. In recent reports, SCGs were incorporated into cementitious materials and other binding systems for building and road constructions.…”

Section: Introductionmentioning

confidence: 99%

Rheology and microstructure effects of waste spent coffee grounds in modifying asphalt binder

Xie

et al. 2023

Low-carbon Mater. Green Constr.

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Herein the biowaste by-product spent coffee grounds (SCGs) from coffee industry were incorporated into asphalt binders for performance enhancement. From the analysis of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), dynamic shear rheometer (DSR), and Brookfield viscosity rheometer, it is confirmed that SCGs have potential prospects as bio-waste modifiers in the application of sustainable pavements. Results demonstrated that the modification process was mainly based on physical reinforcement. Compared with that of the neat asphalt, the shearing stress-resistant ability and high-temperature performance of the SCGs modified binders with the appropriate addition presented a bit of improvement; whereas the binders with 1% and 3% SCGs exhibited remarkably enhanced low-temperature stability. However, notable weaknesses of practical performance were shown for the binder with excessive content of SCGs, indicating the necessity of proportion selecting before application.

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“…The porosity and accumulated pore volume of concrete containing phosphorus slag decrease with the prolongation of curing time. In addition, the finer the phosphorus slag particles, the more uniform the medium distribution, which can improve the compressive strength of concrete (Yang et al, 2021;Mehdizadeh et al, 2022). Fly ash is a fine powder produced during fuel combustion.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the performance of cement mortar incorporating lithium slag as a super-fine aggregate

Dong

Chen

et al. 2023

Front. Mater.

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As a by-product of lithium salt mining, the emission of lithium slag increases yearly due to increased demand. Therefore, the utilization of lithium slag faces a huge challenge. In this study, a new approach to using lithium slag as a super-fine aggregate in cement systems was proposed. The use of lithium slag as a super-fine aggregate replacing 0%, 30%, 50%, 70%, and 100% of the standard sand was tested. The main hydration products of cement–lithium slag paste were calcium silicate hydrate gel, calcium hydroxide, unhydrated particles, and a small amount of ettringite. Lithium slag as a super-fine aggregate could significantly reduce the dead load of structures, enhance flexural and compressive strength and the peak stress of mortar, and no more than 50% lithium slag could significantly enhance the permeability of mortar. The study revealed that the replacement rate of lithium slag as a super-fine aggregate could reach 50%, which is five times more than the amount used as supplementary cementitious material. Therefore, the study brings an innovation in the use of lithium slag in cement systems and improves the performance of cement mortar.

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Properties and microstructure of CO2 activated binder produced by recycling phosphorous slag

Cited by 19 publications

References 54 publications

Development of Mineral Fillers for Acid Resistant Filling Composites

Development of Mineral Fillers for Acid Resistant Filling Composites

Rheology and microstructure effects of waste spent coffee grounds in modifying asphalt binder

Investigation of the performance of cement mortar incorporating lithium slag as a super-fine aggregate

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