Impacts of Phosphogypsum Soluble Fertilizer and Lime Amendment of Acid

Legumes play critical dual roles in grazed grassland ecosystems providing nitrogen inputs and high quality feed for grazing livestock However many species fail to persist in acidic low fertility soils A glasshouse study was conducted to investigate the response of lucerne Medicago sativa to phosphogypsum PG lime and soluble P S fertilizer PS application to two soils Phosphorus

Effect of Autoclaved Aerated Concrete Modification with High Impact

This paper discusses the effect of high impact polystyrene on sound insulation in AAC products The tests demonstrated a positive influence of the modifier on AAC sound insulation enhancement Results from the tests performed on HIPS modified AAC products were showed and compared with the properties of conventional products

Cross Scale Study on Lime Modified Phosphogypsum Cemented Backfill by

Pore structure is a critical factor affecting the strength characteristics of mine backfill materials In this paper based on the mechanical tests on lime modified phosphogypsum cemented backfill LMPGCB the microstructure of the LMPGCB sample was characterized by nuclear magnetic resonance NMR and scanning electron microscopy SEM imaging Based on the fractal theory FT the values

Dr Jijo James Associate Professor in Civil Engineering Sri

Lime activated flyash phosphogypsum blend as a low cost alternative binder International Journal of Environmental Science and Technology August 30 2024 Wetting and Drying Resistance of Lime Stabilized Expansive Soils Modified with Nano Alumina Electronic Journal of the

Phosphogypsum An Industrial Byproduct with Value

Phosphogypsum has been studied for use in cement bricks plaster and more often with added benefits over virgin materials When used as a replacement for limestone for example phosphogypsum has proven to offer a better roadbed

EPA Approves Use of Phosphogypsum in Road Construction

WASHINGTON October 14 2024 — Today Environmental Protection Agency EPA Administrator Andrew Wheeler approved a request from The Fertilizer Institute TFI to allow phosphogypsum to be used in government road construction projects Allowing the reuse of phosphogypsum shows EPA s commitment to working with industry in a way that both reduces environmental waste and protects

Phosphogypsum PG

Abstract In this work the solubility of phosphogypsum PG in water and saturated lime solution was determined in experiments carried out at different temperatures from 10 to 50°C The solubility of natural gypsum NG was also studied at an attempt to find out differences in solubility between PG and NG due to the effect of impurities

phosphogypsum modified with lime In India

They concluded the modified lime powder had much higher activity than ordinary quick lime or slaked lime powder it was the best alkali activator to prepare lime fly ash phosphogypsum binder As per Degirmenci Nurhayat 2024 they investigated Utilization of phosphogypsum as raw and calcined material in manufacturing of building products

Development of low content phosphogypsum waste composites modified by

Dive into the research topics of Development of low content phosphogypsum waste composites modified by lime fly ash basic oxygen furnace slag Together they form a unique fingerprint Lime 78% Particle size 21% Particle size analysis 26% Pollution 21% Road construction 30% Slags 68% Temperature 9% Waste disposal 27% Chemical

Geotechnical Properties and Application of Lime Modified Phosphogypsum

In this study mild acid treated residual phosphogypsum was stabilized with Lime Fly Ash LFA binder and the geotechnical properties and changes in phosphogypsum radioactivity were evaluated Part of the LFA binder were replaced with basic oxygen slag BOG and… View via Publisher Save to Library Create Alert Cite

Performance and Nanostructure Simulation of Phosphogypsum Modified by

Comparing the mechanical properties of blank phosphogypsum G 1 with sample P 1 of similar dry density with sodium carbonate and alum added it can be found that the flexural strength of P 1 is about % of that of G 1 and the compressive strength of P 1 is about % of that of G 1

Influence of phosphogypsum purification with lime on the properties of

DOI / Corpus ID 237651903 Influence of phosphogypsum purification with lime on the properties of cementitious matrices with and without plasticizer

Study on lime fly ash phosphogypsum binder ScienceDirect

The phosphogypsum hastens the reaction between the lime and fly ash so the lime fly ash phosphogypsum obtains a high early strength 2 The optimum modified lime content is around 8 12% the binder with a phosphogypsum content 23 46% have the highest 7D strength while the highest 28D strength is gained when the phosphogypsum content is 18 23%

Strength Properties of Phosphogypsum Based Composite SpringerLink

The best combination of lime phosphogypsum and mirabilite is 4 35 and 1% when the ratio of the quick lime phosphite gypsum and mirabilite is at the curing of 28d age Comprehensive analysis of the results quick lime phosphogypsum and mirabilite should be selected about 5 35 and 1%

LI Hongbo TIAN Juncang BIAN Xing Nvestigation on shear characteristics of hypersaline soil improved by lime and silica fume[J] Journal of Guangxi University Natural Science Edition 2024 41 4 ZHU Huajun et al Properties of solidified and modified saline soil by high magnesium nickel slag phosphogypsum based cementitious materials

A new civil engineering material normal temperature modified

The best ratio of the embedded filler was 65% original phosphogypsum 20% Fly ash 6% desulfurized ash 6% quicklime 3% silica fume and right amount of water The basic physical properties of the PG embedded filler prepared met the Chinese technical specification gypsum filler for cast in situ concrete hollow structure JC/T 2472 2024

Reducing Compressibility of the Expansive Soil by Hindawi

Bian et al studied the physical and mechanical characteristics of lime modified expansive soil through experimental research and found that as the ash content increases the cohesion internal friction angle and CBR value of the expansive soil increase after that they proposed that the CBR and direct shear strength of 7 day cured lime soil

Method of Processing Phosphogypsum Ru2487083c1

FIELD method of processing phosphogypsum involves leaching phosphogypsum which contains rare earth elements and impurities including phosphorus fluorine and sodium by passing sulphuric acid solution with concentration of 3 6 wt % at liquid to solid ratio of through a layer of phosphogypsum to transfer the rare earth elements and impurity components into the

Pb II Removal from Aqueous Solution and Industrial SpringerLink

This study was aimed to compare the Pb II adsorption from aqueous solutions between raw phosphogypsum UP and lime conditioned phosphogypsum LCP in batch systems The Pb II adsorption by UP and LCP was investigated depending on the process variables such as solution pH contact time and initial Pb II concentration The adsorption capacity q m of UP and LCP as mg/g was found to be 1

Geotechnical Properties and Application of Lime Modified Phosphogypsum

In this study mild acid treated residual phosphogypsum was stabilized with Lime Fly Ash LFA binder and the geotechnical properties and changes in phosphogypsum radioactivity

Potential of Bentonite lime mix Modified with Phosphogypsum and

Potential of Bentonite lime mix Modified with Phosphogypsum and Reinforced with Sisal Fibres Periodica Polytechnica Civil Engineering 2024 rakesh kumar Dutta Download Download PDF Full PDF Package Download Full PDF Package This Paper

Experimental Study on the Road Performance of High Content of

PG reacts with lime more completely and fully According to the criteria of JTG D50 2024 2024 CCCC Road and Bridge Technology Co 2024 the mix proportions A and B are suitable for the base course of heavy traffic class II and below The mix proportion C is suitable for subgrade of extremely heavy traffic class II and below

Phosphogypsum waste as additives to lime stabilization of bentonite

Lime is natural pozzolans widely used to improve durability of the concrete against chemical attack mainly due to reduced permeability [ 15 16 ] Raw lime CaO is formed from the process of decarbonation of calcareous rocks by heating It is available at low cost and generates a low ecological footprint

Study on lime fly ash phosphogypsum binder 2024 Weiguo Shen 118

The modified lime powder had much higher activity than ordinary quick lime or slaked lime powder it was the best alkali activator to prepare lime fly ash phosphogypsum binder The optimum formulation of this binder was consisted of 8 12% modified lime 18 23% phosphogypsum and 65 74% fly ash

Lime activated flyash phosphogypsum blend as a low cost PubMed

The optimal lime fly ash phosphogypsum blend mortar was also subjected to an X ray diffraction analysis to determine the reaction products formed during hydration The study revealed that 5% lime mixed with fly ash phosphogypsum in the ratio of 3 1 was the optimal proportion which gave the maximum strength to the cubes The optimal lime fly ash

PDF Cross Scale Study on Lime Modified Phosphogypsum Cemented

Pore structure is a critical factor affecting the strength characteristics of mine backfill materials In this paper based on the mechanical tests on lime modified phosphogypsum

Phosphogypsum An Industrial Byproduct with Value

Phosphogypsum is a by product of the phosphates industry Produced in significant quantities the material is considered a waste in the US due to radioactivity where the primary means of management is storage in stacks But around the world phosphogypsum is increasingly being utilized in beneficial reuse applications with research

A Novel Process to Recover Gypsum from Phosphogypsum

This method can homogenize phosphogypsum with high quality fluctuations and low organic matter content Lime neutralization treatment is widely used in the production of cement retarders because of its simple process low investment obvious effect and low amount of secondary pollution

Forms of lime application and use of phosphogypsum in low acid soil in

Soil chemical properties were evaluated 48 months after liming in NT Lime incorporation decreases acidity but decreases SOM Surface liming exerted significant effects on pH up to m depth High doses of phosphogypsum increase Mg and K leaching Soybean and wheat yield was not influenced by base saturation levels ABSTRACT

Geotechnical Properties and Microstructure of Lime Fly Ash

The strength development for lime fly ash phosphogypsum specimen depends on a number of factors and lime fly ash ratio being one of the most important factors affecting strength Both the raw and treated PG stabilizers prepared at the PG content of 50% The lime to fly ash ratio was for the raw PG and 1 for the treated PG specimen