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utilisation of phosphogypsum in cement

Optimizing the physical and technological properties of cement ...

@article{osti_404584, title = {Optimizing the physical and technological properties of cement additives in concrete mixtures}, author = {Demirbas, A}, abstractNote = {In this article, the physical and technological properties of phosphogypsum, borogypsum, sludges and reactor residue recovered from boric acid factor, lignite ashes, and steel making slags samples were investigated.

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Utilization of original phosphogypsum for the preparation of concrete

Utilization of phosphogypsum as raw and calcined material in manufacturing of building products. Constr. Build. Mater., 22 (2008), pp. 1857-1862. ... Analysis of phosphogypsum's physical and chemical properties and making of anhydrite cement from phosphogypsum. Appl. Mech. Mater., 275-277 (2013), pp. 2131-2135. View Record in Scopus Google ...

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Proceedings of the Third International Symposium on Phosphogypsum ...

Another potential for application of large quantities of phosphogypsum is in the manu- facture of novel cement consisting mainly of industrial wastes and by-products such as calcined phosphogypsum, fly ash, pelletised blast furnace slag, other siliceous materials, and lime and/or Portland cement.

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Phosphogypsum Market | Global Industry Report, 2030

Phosphogypsum: Introduction. Phosphogypsum, also called calcium sulfate hydrate, is formed as a by-product during the production of fertilizer from phosphate rock. Phosphogypsum is a side-product obtained from the production of phosphoric acid by treating phosphate ore (apatite) with sulfuric acid. It is primarily composed of gypsum (CaSO4·2H2O).

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Utilization of Fly Ash in producing bricks from Cement - NBM&CW

Cementitious binder with fly ash and phosphogypsum content equal to 80% gives better compressive strength and 20.25% water absorption and thus suitable for use in construction industry. Being lighter in weight, Cement, F.A. and P.G. mix will reduce the dead weight and material handling cost in multi storied constructions.

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Effect of the phosphogypsum calcination time on the compressive ...

[26] Değirmenci N 2008 Utilization of phosphogypsum as raw and calcined material in manufacturing of building products Constr. Build. Mater. 22 1857-62. Go to reference in article Crossref Google Scholar [27] Taher M A 2007 Influence of thermally treated phosphogypsum on the properties of Portland slag cement Resour. Conserv. Recycl. 52 28-38

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Utilization of Weathered Phosphogypsum As Set Retarder in Portland Cement

This paper investigated the usability of weathered phosphogypsum (PG) from residue areas as set retarder in Portland cement. The effects on the setting and mechanical properties of PG added in ratios 1, 3, 5, 7, 10, and 12.5 wt.% to Portland cements were studied and compared with a Portland cement containing natural gypsum (NG).

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Laboratory Study of Phosphogypsum, Stabilizers, and Tropical Soil ...

Phosphogypsum (PG) is a by-product of the phosphoric acid fertilizer industries that has possible applications in paving when stabilized with cement or lime. This study's aim is to compare the mechanical performance of the hemi-hydrate (HH) and dihydrate (DH) mixes with tropical soil, lime, and cement.

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Application Prospects of Phosphogypsum in the Production of ...

Due to the existence of impurities in phosphogypsum, there will be adverse effects on the hydration process of sulphoaluminate cement if phosphogypsum is directly used as post adding gypsum, which is similar to the problem of using phosphogypsum as a retarder component of ordinary Portland cement, in addition, the content of CaSO 4 ·2H 2 O in ...

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Valorisation of Phosphogypsu m in Concrete (Non-Load Bearing ... - LGCI

The aim of this project is the recovery of industrial wastes in concrete for non-load bearing structures and the use of phosphogypsum as a regulator of Portland cements in different proportions. Preliminary tests showed that the use of phosphogypsum does not affect the strengths of concrete after seven and twenty eight days of hydration.

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Performance and Nanostructure Simulation of Phosphogypsum Modified by ...

In order to obtain phosphogypsum with high mechanical properties, the water-cement ratio should be controlled within the range of 0.70-0.72. At this time, the flexural strength is higher than 2.0 MPa, and the compressive strength is higher than 7.2 MPa.

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Experimental Study on Concrete by Partial Replacement of Cement ... - IJERT

This study provides a comprehensive overview of engineering and construction properties of thermosetting plastics and phosphogypsum for use in concrete as partial replacement materials. Test on constituent materials. Cement: Ordinary Portland cement of 53 grade conforming to IS 12269:1987 was used for the study. For the cement the standard ...

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Effect of fibers addition on mechanical properties of eco-friendly ...

The utilization of phosphogypsum as a sustainable phosphate-based fertilizer by Aspergillus Niger. Agronomy (2022) ... Modification of phosphogypsum using circulating fluidized bed fly ash and carbide slag for use as cement retarder. Construct. Build. Mater. (2022) View more references. Cited by (0) Recommended articles (0) View full text ...

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Utilization of Phosphogypsum as Raw Material for Manufacturing of Non ...

Non-fired load-bearing wall was prepared utilizing non-treated original waste PG as raw material in the laboratory. When the amount of PG and cement is 65% and 10% (by weight) in the mixture, respectively, the compressive strength of bricks is still over 23MPa and the flexural strength comes up to 4MPa. Besides, the bricks hold excellent water-resistance and frost-resistance.

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In Situ Remediation of Phosphogypsum with Water-Washing Pre-Treatment ...

The overall results proved that in treated phosphogypsum-based cemented paste backfill (TCPB), the altered particle size distribution can alleviate the shear-thinning characteristic. The mechanical properties were significantly optimized, of which a maximum increase of 183% of stress value was observed.

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Phosphogypsum in the Circular Economy - AAPFCO

• ^Phosphogypsum is a radioactive waste product _ • ^EPA requires that phosphogypsum be managed in above-ground stacks, which are designed to keep emissions of radon and other radionuclides in line with acceptable risk practices. •The current EPA PG rule allows very little use only in agriculture, and restricted by radium-226 concentration

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Potential Uses of Phosphogypsum and Associated Risks: Background ...

It is uncertain which of the above processes are used by each of the phosphoric acid facilities; however, indications are that only two or three facilities use one of the processes which generate the hemihydrate phosphogypsum while the large majority of the facilities use one of the processes which generate the dihydrate phosphogypsum (EPA90).

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Phosphogypsum Market | Global Industry Report, 2030

Phosphogypsum is employed in agriculture for soil amendment, or as fertilizer, as well as in the and cement industry and in road construction, Rapid infrastructural developments is estimated to boost the consumption of phosphogypsum at a rapid pace across the globe in the near future.

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Study on Preparation and Durability of Phosphogypsum Composite ...

Sep 1, 2020The results show that compared with cement based concrete, phosphogypsum based concrete has stronger performance of resisting acid and alkali salt attack. This is mainly due to the fact that its internal cement minerals and hydration products have less active components, and are not easy to react with acid-base salts, and have better ...

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Recycling utilization of phosphogypsum in eco excess-sulphate cement ...

This paper investigates the effect of metakaolin (0-50%) on early hydration, phase assemblages and mechanical properties of the excess-sulphate phosphogypsum cementitious materials (ESPCMs). Results indicate that metakaolin is related to a new exothermic peak and significantly shortens the induction period.

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The study on the effect of flotation purification on the performance of ...

on the use of otation process for phosphogypsum purication, and the current relevant studies include the purication of phosphogypsum by otation method by Wang et al., aˇer purication, the whiteness of phospho-gypsum was signicantly increased, the purity reached 96.5%, and the soluble phosphorus and ˚uorine content

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Behavior of Cement Pastes and Mortar Containing Phosphogypsum

The aim of this study is to investigate the effects of phosphogypsum on the properties of both cement pastes and mortars. Normal Portland cement CEM Ι 32,5N, Limestone Blended cement CEM ΙΙ...

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Effect of Modified Phosphogypsum on Properties of Cement Mortar

The resource utilization of phosphogypsum (PG) can reduce the consumption of resources, turn waste into valuables, turn damage into profit, and form a green recycling economy of...

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Enginering Advantages of Waste-Phosphogypsum in Con- KEYWORDS : crete

Portland cement can be replaced with phosphogypsum to develop a good and hardened concrete to achieve economy. The traditional methods for producing construction materials are using the valuable natural resources. Besides, the industrial and urban management systems are generating solid wastes, and most often dumping them in open fields.

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Utilization of the waste phosphogypsum for the Portland cement clinker ...

Phosphogypsum could be successfully applied as mineralizer in cement production, because with its addition, better composition of Portland cement clinker at the same sintering conditions could be obtained. Keywords:, PhosphogypsumPortland cement clinkermineralizer, More Share Options, Related research,

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Abaca Fiber Reinforced Phosphogypsum Concrete Panels (modulus ... - Miami

Water/(Cement + Phosphogypsum) ratio was varied from 0.46 to 0.60. Thickness of panels tested was 3/8 in., 1/2 in., and 5/8 in.Test results indicate that phosphogypsum can be used in concrete as a fine aggregate. High strength capacity can be obtained when phosphogypsum in a mix is less than 50 percent of the total solid weight.

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Utilization phosphogypsum as a construction material for road base: a ...

Nov 11, 2021PG was also used in cement stabilized dredged soil with high water content as an additional binder to improve the engineering properties [ 31 ]. The increasing PG content led to a decrease in water content but increase the density of the mixture.

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The determination of appropriate phosphogypsum: Class C fly ash ...

Table 3.4 - Radionuclide concentrations in phosphogypsum ..... 68 Table 3.5 - Chemical analysis of Class C fly ash (As per Bayou Ash Inc., 2002)..... 69 Table 3.6 - Chemical analysis of Portland Type II cement (As per River Cement

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The Effects of Phosphogypsum on The Setting and Mechanical Properties ...

These impurities seriously restrict the industrial use of phosphogypsum in cement industry as a retarder. In this study, the effects of phosphogypsum and purified phosphogypsum on the hydration of portland cement and trass cement were investigated by measuring setting time, strengths of pastes, and chemical analysis as well as the electron ...

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Calcium Hydroxide Washing Treatment of Jordanian Phosphogypsum ... - IIETA

Therefore, the treated Jordanian phosphogypsum can be used in cement industry. This will contribute to the reduction of waste phosphogypsum which considered as environmental concern from one side and provide cement industry with low cost raw material on the other side. Keywords:

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Phosphogypsum, tropical soil and cement mixtures for asphalt pavements ...

DOI: 10.1016/J.RESCONREC.2019.01.029 Corpus ID: 117174436; Phosphogypsum, tropical soil and cement mixtures for asphalt pavements under wet and dry environmental conditions @article{Silva2019PhosphogypsumTS, title={Phosphogypsum, tropical soil and cement mixtures for asphalt pavements under wet and dry environmental conditions}, author={Millena Vasconcelos Silva and L.R. de Rezende and Marcia ...

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The Coupling Effect of Organosilicon Hydrophobic Agent and Cement on ...

The aluminate phase in the cement reacted with the phosphogypsum to form needle-like ettringite, thereby leading to a lower strength. The amount of cement increased, the calcium sulfate dihydrate coarsened because the cement promoted the hydrolysis and polymerization reactions of the hydrophobic agent, according to the results of the XPS spectrum.

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Recycling phosphogypsum as the sole calcium oxide source in ... - PubMed

Because the disposal of phosphogypsum (PG) can lead to serious contamination of the air, soil, and water, recycling of PG has attracted wide attention. This study investigated the effect and solidification of phosphorus in the production of calcium sulfoaluminate (CSA) cement using PG as the sole Ca .

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8 VII July 2020 https://doi/10.22214/ijraset.2020

The use of GGBS with cement improves ... It is used as a substitute for natural gypsum in the manufacturing of portland cement to set control. Phosphogypsum is used in the production of artificial ...

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Environmental Problems of Phosphogypsum Utilization

Study of Pavements of Concrete Paving Blocks with Ribbed Underside Surface p.101. ... Félix A. López.- Radiochemical Characterization of Phosphogypsum for Engineering Use / Journal of Environmental Protection, 2011, 2, 168-174. DOI: 10.4236/jep.2011.22019

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Utilization of solidified phosphogypsum as Portland cement retarder ...

The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste. Cement using raw PG as retarder has two problems pressing for solution,namely, delaying the setting time and difficulty being fed into the cement mill.

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Utilisation of phosphogypsum along with other additives in geo ...

Shilva et al. (2019) treated laterite soil with hemihydrate phosphogypsum (PGH) and a small quantity of cement; furthermore, they observed the durability and mechanical characteristics to emphasise the suitability for asphalt pavement layers.

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Application of lime neutralised phosphogypsum in supersulfated cement ...

Nov 1, 2020in general, the most commonly methods to utilise the pg are simply use it as the additive of soil stabilization ( ammar et al., 2016 ), the fertilizer for agricultural industry ( abril et al., 2009 ), and the calcined materials for production of gypsum board or incorporated into portland cement as backfill and retarder ( chen et al., 2018; min et .

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Assessment of Phosphogypsum as a Constituent of Aggregate Material

cussed the use-of phosphogypsum in cement retarders, fillers~ plasters, and prefab­ ricated products. Florida phosphogypsum contains traces of phosphate and fluo­ ride, which must be removed in order to use the phosphogypsum in these applica­ tions. Wheelock (7) reported on the man­

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Utilisation of phosphogypsum in cement concrete for strength and ...

The phosphogypsum content was varied from 0 to 20% to replace cement by weight. Mixing was carried out as per IS: 1199 - 1970 specification (19). High frequency external vibration was used to consolidate the concrete cube sgecimen 150-mm sides.

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