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Five clusters were formed: a red cluster-phosphogypsum recycling in the construction industry; green cluster-radiation pollution problem of phosphogypsum and phosphate fertilizers; yellow cluster ...
The natural radioactivity level in the waste-phosphogypsum could be a restriction for its use as building material, but this drawback could be avoided controlling its percentage in the cement preparation and the natural radioactivity level of the other raw materials used in its production, in addition to the calculation of the Ra-equivalent ...
Phosphogypsum (PG), the main industrial by-product of phosphate fertilizer industry, primarily consists of calcium sulfate dihydrate. However, it contains various impurities with variable quantities depending on the origin of the phosphate rock. ... Over the years, research has been conducted to utilize PG as a building material component …
Phosphogypsum (PG) is a by-product of the production of fertilizers from phosphate ores, and it contains some harmful substances to the environment. Thus, it is necessary to stabilize/solidify pollutants when using PG as a filling material. The purpose of this study is to investigate and verify the use of PG as a filling material for a road base …
Abstract Phosphogypsum (PG: CaSO4·2H2O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy …
Phosphogypsum (PG) is a byproduct of the wet manufacturing process for phosphoric acid and is considered an industrial waste material. Around 5 tonnes of PG …
Large quantities (approximately 69 million tons) of phosphogypsum are produced as a by-product of the fertiliser industry in Brazil. Although phosphogypsum is mainly calcium sulphate dihydrate, it contains a high level of impurities, including uranium and thoriu decay products, which originate primarily from the source phosphate rock …
In countries where reuse is practiced – such as road building, construction material, fertilizer, and landfill cover – up to 20% of annual phosphogypsum production is diverted from stacking to other uses. While the approval of TFI's request does not mean that phosphogypsum will become widespread in roads, it allows state and local ...
The natural radioactivity. level in the waste-phosphogypsum could be a. restriction for its use as building material, but this. drawback could be avoided controlling its percentage. in the …
The impurities in phosphogypsum and its harm to the environment were introduced, and the advantages and disadvantages of the widely used pretreatment methods were analyzed in this paper. The application of phosphogypsum in the fields of cement retarder, building materials, agriculture, the production of sulfuric acid co …
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 best known disadvantages of adobe are its low mechanical properties and poor resistance to water damage. In this research waste phosphogypsum (PG) and natural gypsum were used as stabilization material to improve the properties of adobe soil and to reduce its disadvantages at least partially. The compressive and flexural …
Valorization of phosphogypsum in cement-based materials: Limits and potential in eco-efficient construction. Bianca R.S. Calderón-Morales, ... Rafael García-Tenório, in …
1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009 S03-4 83 ADVANTAGES AND DISADVANTAGES OF USING PHOSPHOGYPSUM AS BUILDING MATERIAL. RADIOLOGICAL ASPECTS C. Gascó1, A.Alvarez1, N.Navarro1, L. Yagüe1, H.Tayibi2, F.A.López2, A. López-Delgado2 …
1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009 S03-4 83 ADVANTAGES AND DISADVANTAGES OF USING PHOSPHOGYPSUM AS BUILDING MATERIAL. RADIOLOGICAL ASPECTS C. Gascó1, A.Alvarez1, N.Navarro1, L. Yagüe1, H.Tayibi2, F.A.López2, A. López-Delgado2 …
The best known disadvantages of adobe are its low mechanical properties and poor resistance to water damage. In this research waste phosphogypsum (PG) and natural gypsum were used as stabilization ...
Abstract. Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the …
Phosphogypsum (PG) is a by-product of the phosphate fertilizer industry that is produced during the phosphoric acid production process. Annual global PG production ranges …
Utilization of original phosphogypsum as raw material for the preparation of self-leveling mortar. Journal of Cleaner Production, Volume 127, 2016, pp. 204-213 ... Phosphogypsum recycling in the building materials industry: assessment of the radon exhalation rate. Journal of Environmental Radioactivity, Volume 172, 2017, pp. 232-236.
Phosphogypsum (PG), a byproduct during the phosphoric acid production process, also known as the wet process, contains complex and diverse impurities, resulting in low utilization and considerable accumulation. This leads to a massive waste of land resources and a series of environmental pollution problems. Given the current urgent …
1. Introduction. Phosphogypsum (PG), CaSO 4 ·2H 2 O, is a by-product coming from the processing of fluoroapatite resulting in H 3 PO 4 production. In the process, fluoroapatite is dissolved using sulfuric acid. Phosphoric acid (PA), phosphogypsum, and hydrofluoric acid are obtained: (1) Ca 5 (PO 4) 3 F + 5H 2 SO 4 + 10H 2 O→3H 3 PO 4 …
In China, PG is mainly used in cements, building materials, and sulfuric acid production (Fig. 8) ... its detection efficiency only depends on parameters such as composition and bulk density. Disadvantages with respect to alpha spectrometry are (a) the requirement of larger sample masses, (b) higher backgrounds and noises in gamma …
PRODUCING ENVIRONMENT-CONSCIOUS BUILDING MATERIALS FROM CONTAMINATED PHOSPHOGYPSUM Konstantin Kovler1) and Michael Somin2) 1) Faculty of Civil and Environmental Engineering, Technion – Israel Institute of Technology, Haifa, Israel 2) Phosphate Technology Ltd., Haifa, Israel Abstract It is known that …
Phosphogypsum has poor cementitious activity, which hinders its large consumption in the field of building materials. By studying the phase and microstructure of phosphogypsum pretreated by alkali activation, and the compressive strength, and microstructure of the non-sintering building materials prepared with the high content …
More specifically, PG can be used as a substitute in the cement industry, in building materials and in road construction, as a fertilizer for soil improvement, as a raw material for the production of some chemicals, and as a backfilling material for the rehabilitation of abandoned mines and quarries, while the recovery of gypsum and the ...
Valorization of phosphogypsum in cement-based materials: Limits and potential in eco-efficient construction. Bianca R.S. Calderón-Morales, ... Rafael García-Tenório, in Journal of Building Engineering, 2021. Abstract. Phosphogypsum (PG) is a type of synthetic gypsum generated during the production of phosphoric acid. Each ton of phosphoric …
1st Spanish National Conference on Advances in Materials Recycling and Eco – Energy Madrid, 12-13 November 2009 S03-4 83 ADVANTAGES AND DISADVANTAGES OF …
1. Introduction. Phosphogypsum (PG) is among the by-products emitted by the phosphorus chemistry industry. About 5 tons of PG are emitted for each ton of phosphoric acid produced [1, 2], and its reaction is shown in Eq (1).About 300 million …
Valorisation of phosphogypsum as building material: radiological aspects ... 2011; Nowadays, alternative uses of phosphogypsum (PG) in the building industry are being considered in several countries; however, the natural radioactivity level in the PG could be a restriction for ... Advantages and disadvantages of using phosphogypsum …
Utilisation of PG in building materials. One of the main possibilities for the utilisation of PG is found in the field of building materials. PG can be used as an additive to cement [[37], [38], [39]], but also as the binding material of construction products, such as wall blocks, tiles or boards. The mechanical properties of PG products are ...