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. …
Lime-modified phosphogypsum can reduce the impact of impurities (such as P 2 O 5, F −) and shorten the setting time.. The OH − released by the dissolution of lime can accelerate the dissolution of slag powder and promote the hydration reaction.. After phosphogypsum is modified by lime, the porosity of the phosphogypsum-based …
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 …
The chemical compositions of phosphogypsum, fly-ash, quick lime, slaked lime and modified lime were given in Table 1, those materials were used as raw materials for making lime–fly ash–phsphogypsum binder.The modified lime (stabilizer) was manufactured by blending quick lime with 10% of additives and grinding together in a ∅ …
4.1 Unconfined compressive strength test. Samples are prepared according to the test code for modified inorganic cementations materials in Highway Engineering (JTG E51-2009) [].Red clay and phosphogypsum are passed through a seive (2 mm), weighed according to the ratio in Table 4, and mixed evenly.Then, the predetermined …
DOI: 10.5755/J01.MS.24.3.18232 Corpus ID: 139365625; Geotechnical Properties and Application of Lime Modified Phosphogypsum Waste @article{Mashifana2018GeotechnicalPA, title={Geotechnical Properties and Application of Lime Modified Phosphogypsum Waste}, author={Tebogo Mashifana and Felix Ndubisi …
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.
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 the properties of the LFA-BOG composite were also evaluated.
The optimum mixing range for this authorized part is 12–14.5% phosphogypsum, 4–6% fly ash, and 2–3% lime Point P14F4L2 is located in this area, which indicates that in the case of a phosphogypsum content of 14%, fly ash content of 4%, and lime content of 2%, it is possible to meet the requirements of modified …
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
Geotechnical Properties and Application of Lime Modified Phosphogypsum Waste. TEBOGO MASHIFANA. Materials Science. See Full PDF Download PDF. See Full PDF ...
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 …
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 ...
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 …
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 0.6 for the raw PG and 1 for the treated PG specimen.
A suitable content of phosphogypsum and a reasonable content of fine aggregate are conducive to improving the roadway engineering properties (i.e., …
Using lime neutralization to pretreat PG, the pH value, mortar consistency and setting time, activation index, and physical properties as well as the Fourier transform infrared spectroscopy and ...
An appropriate amount of lime modified phosphogypsum helps remove impurities in phosphogypsum, improves the reactivity of slag powder, and promotes the …
Phosphogypsum could effectively improve the tunnel muck generated in silt stratum. • The improved tunnel muck meets the requirement for subgrade performance. • A 3:1 ratio of lime to phosphogypsum has the best improved effect for tunnel muck. • CMC could create bonds with the hydration products of lime and phosphogypsum.
AMA Style. Huang S, Ma Y, Wang J, Lin Z, Chen T. Experimental Study on the Road Performance of Phosphogypsum-Modified Lime-Fly Ash Stabilized Red Clay.
The results revealed that phosphogypsum significantly enhances the early strength and moisture stability of lime-fly ash soil. The mechanical properties of lime-fly …
312 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 ...
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, …
In this study, three proportions of phosphogypsum–lime–fly ash (PLF) mixture were designed, first, according to orthogonal tests. The comprehensive performance of the PLF mixture was tested by the …
This paper investigates the valorization of phosphogypsum and fly ash by-products as a road construction material through lime stabilization. To this end, an extreme vertices design was adopted to model the compaction characteristics, mechanical performance at different curing periods and durability upon wetting/drying (W/D) cycles …
Kumar et al. 10 carried out a study on the engineering characteristics of bentonite stabilized with lime and phosphogypsum. The research included tests on …
1. Introduction. Phosphogypsum (PG) a by-product from the phosphoric acid industry is a remarkable solid waste, and about 4.5–5.0 tonnes of dry-based PG is outputted per ton of phosphoric acid (as P 2 O 5) recovered [].Approximately 20 million tonnes of PG is generated in China every year, and its utilization ratio is not more than …
Phosphogypsum (PG) is a by-product from the industry of phosphate fertilizer industry. Approximately 5 tonnes of PG are generated for per ton of phosphoric acid production. The accumulation of PG occupies huge amounts of land resources and results in serious environmental risks. In this study, a new civil engineering building …
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H3PO4) production from natural phosphate rocks. Approximately 4–6 tons of PG is produced per ton of phosphoric acid production, where worldwide PG generation exceeds 300 million tons annually. The vast majority of produced PG is discarded …
The flyash-lime-phosphogypsum composite (flyash + 8% lime + 2% phosphogypsum) cured for 28 days can be used as a base/subbase course material in road pavements. View Show abstract
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