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 …
Strength Characteristics of Fly Ash Stabilized with Lime and Modified with Phosphogypsum (2017), 10.1016/j.jobe.2017.09.010. Google Scholar. Eades and Grim, 1960. J.L. Eades, R.E. Grim. A quick test to determine lime requirements for lime stabilization.
Solid waste recycling and reuse have attracted great interest as environmentally friendly modifiers for asphalt pavements in recent years, and phosphogypsum whiskers (PSWs) synthesized by phosphogypsum (PSP) wastes were used as the main modifying material to develop an environmentally friendly asphalt binder in this study.
It was observed that the Atterberg limits were modified as the phosphogypsum concentration increased and the L.L of the soil increased. ... Pandian PK (2015) Effect of …
Results from Unconfined Compressive Strength (UCS) tests showed a strength increase with fly ash and lime addition with increasing the curing time. The UCS at 180 days …
Research on the performance of phosphogypsum modified lime pavement base material. Highway, 2008(1): 141-145. [16] Wu Kaiquan, Lu Yong, Zhang military. Discussion on modified fly ash gravel base with waste phosphogypsum. Road Construction Machinery and Construction Mechanization, 2007(11): 56-58.
ISSN 1392–1320 MATERIALS SCIENCE (MEDŽIAGOTYRA). Vol. 24, No. 3. 2018 Geotechnical Properties and Application of Lime Modified Phosphogypsum Waste Tebogo MASHIFANA 1, 2, Felix Ndubisi OKONTA 1, Freeman NTULI 2 1 Department of Civil Engineering Sciences, University of Johannesburg, P.O. Box 524, Auckland Park 2006, Johannesburg, South Africa 2 …
Experimental Study on the Road Performance of Phosphogypsum-Modified Lime-Fly Ash Stabilized Red Clay. Shibin Huang Yanzhou Ma Jia-quan Wang Zhinan Lin Tianxin Chen. ... 2023; To assess the impact of solid waste phosphogypsum on the road performance of lime-fly ash-stabilized red clay, we conducted comprehensive tests on the road performance ...
Corpus ID: 215736528; DEVELOPMENT OF LOW CONTENT PHOSPHOGYPSUM WASTE COMPOSITES MODIFIED BY LIME-FLY ASH-BASIC OXYGEN FURNACE SLAG @inproceedings{Mashifana2019DEVELOPMENTOL, title={DEVELOPMENT OF LOW CONTENT PHOSPHOGYPSUM WASTE COMPOSITES MODIFIED BY LIME-FLY ASH-BASIC …
The paper presents the potential of bentonite-lime-phosphogypsum mix reinforced with sisal fibre in effectively reducing the pavement thickness in an extremely problematic sub-soil condition ...
HIGHLIGHTS. What: This study conducted a series of indoor experiments by manipulating the dosage of phosphogypsum and the curing age, ultimately culminating in an analysis of the microstructure of the improved lime-ash soil using SEM (Scanning Electron Microscopy) and XRD (X-Ray Diffraction) techniques. This study explores the moisture stability of improved soils …
Supersulfated cement (SSC) is a kind of environment-friendly cement as well as a newly developed non-burnt cementitious material with less clinker or even without clinker [1], [2].The common compositions of SSC are always about 75–85% ground granulated blast furnace slag (slag), 10–20% gypsum as sulfate activator, and less than 5% clinker or lime as alkali …
To assess the impact of solid waste phosphogypsum on the road performance of lime-fly ash-stabilized red clay, we conducted comprehensive tests on the road performance, swelling and shrinkage characteristics, and mechanical properties of lime-fly ash soil with varying phosphogypsum content and curing age. Additionally, we analyzed the microstructure and …
Abstract. 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 "resources-products-regenerated resources." The article, combined with the comprehensive utilization of PG, analyzes the existing problems. Using lime neutralization to …
This treatment method involves the addition of alkaline-modified materials, such as quick lime, into phosphogypsum; the alkaline-modified material reacts with the soluble phosphorus and soluble fluorine and converts the refractory inert materials to precipitates. This method can homogenize phosphogypsum with high-quality fluctuations and low ...
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) …
the dosage of phosphogypsum and the curing age, ultimately culminating in an analysis of the microstructure of the improved lime-ash soil using SEM (Scanning Electron Microscopy) and XRD (X-Ray Diffraction) techniques. These analyses aimed to elucidate the reinforce-ment mechanism of phosphogypsum on the lime-ash stabilized red clay. The goal is to
Phosphogypsum (PG), a solid waste from the wet process phosphoric acid industry, but the utilization rate is low at present. The effect of phosphogypsum and cement on small strain dynamic characteristics of coastal soft soil was studied by resonance column test, and characterize the micro-mechanisms of the specimens by SEM and EDS test.
Free Online Library: Experimental Study on the Road Performance of Phosphogypsum-Modified Lime-Fly Ash Stabilized Red Clay. by "Applied Sciences"; Science and technology, general Gypsum Refuse and refuse disposal Solid wastes Waste management X-ray diffraction X-rays Diffraction
In this study, three proportions of phosphogypsum–lime–fly ash (PLF) mixture were designed, first, according to orthogonal tests.
Development of low content phosphogypsum waste composites modified by lime-fly ash-basic oxygen furnace slag. T. P. Mashifana, F. N. Okonta, F ... F. N. ; Ntuli, F. / Development of low content phosphogypsum waste composites modified by lime-fly ash-basic oxygen furnace slag. In: Revista Romana de Materiale/ Romanian Journal of Materials. 2019 ...
In this study, phosphogypsum was stabilized by lime to improve the mechanical properties [California bearing ratio (CBR), resilience modulus, unconfined compressive …
From 3.1 Soluble phosphorus and soluble fluorine contents of modified phosphogypsum at different aging time, 3.3 Effect of modified phosphogypsum on properties of cement, it can be seen that when the undisturbed phosphogypsum content is 90% and the ratio of carbide slag to CFB fly ash is 6:4 (GX3), the modification effect is the best, and it ...
The microstructural development of bentonite modified with 8 % lime and 8 % phosphogypsum were studied through techniques like the scanning electron microscope and the electron dispersive absorption x-ray diffraction to account for the changes in the
Phosphogypsum is a by-product of the phosphate fertilizer industry (Millán-Becerro et al., 2020).In general, approximately 5 tons of phosphogypsum are to be generated as the production of 1 ton of phosphoric acid (Zemni et al., 2018).It is estimated that the annual production of phosphogypsum is around 200–300 million tons worldwide, in which China …
Development of low content phosphogypsum waste composites modified by lime-fly ash-basic oxygen furnace slag, Revista Romana de Materiale - Romanian. J. Mater., 49 (2) (2019 ... Basic properties of non-sintering cement using phosphogypsum and waste lime as activator. Constr. Build. Mater., 21 (6) (2007), pp. 1342-1350. View PDF View article ...
Phosphogypsum (PG) modified by milk of lime (namely lime-preconditioned phosphogypsum, PPG) is investigated to evaluate the adsorption thereof for removing Congo Red (CR) from aqueous solution. The …
Development of low content phosphogypsum waste composites modified by lime-fly ash-basic oxygen furnace slag T.P. Mashifana1, 2, F.N. Okonta2, F. Ntuli1 1University of Johannesburg, Department of Chemical Engineering, P.O. Box 17011, Doornfontein 2088, South Africa. Tel.:+27 11 559 6527, Email: [email protected] (Corresponding author)
Residual deposits of Phosphogypsum are readily available in large quantities in South Africa and currently are landfilled or pumped into the sea, as there are limitations to engineering applications due to the radionuclides content. In this study, mild acid treated residual phosphogypsum was stabilized with Lime Fly Ash (LFA) binder, and the geotechnical …
principal curing agents, cement, lime, and phosphogypsum were utilized to enhance red mud. The dosage of the modifier and the level of compaction were two crucial indicators
Conclusion In this study the three readily available wastes material, waste phosphogypsum (PG) modified with lime (L), waste fly ash (FA) and waste of basic oxygen furnace slag (BOF slag) were used to develop composites that can be used for building and construction applications. The resulting composite unconfined compressive strength meets a ...
The paper presents the strength characteristics of fly ash stabilized with lime and phosphogypsum. A series of unconfined compression strength test and unconsolidated …
