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From the building materials angle, the utilization of fly ash, slags, phosphogypsum, fluorogypsum, press mud, red mud etc. is paramount. Over million tonnes of byproduct gypsum are produced annually from several phosphatic and hydrofluoric acid industries in India, Singh1.
2. Material for the construction of highways and streets, 3. Material for pipe bedding, and 4. Material for loadbearing surfaces. While phosphogypsum does not present a viable alter native to use Number 1, it should be considered for the remaining categories. A significant portion of this construction mate
Just 15% of world creation of PG is reused as building material, agricultural composts or soil stabilization adjustment and as set controller in the Portland cement production [2]. The staying 85% is discarded with no treatment and these by products are usually disposed of in large weatherexposed warehouses that occupy a large area and cause genuine environmental damage.
Phosphogypsum can be classified as a Naturally Occurring Radioactive Material (NORM) residue of the phosphate fertilizer industry. One of the main environmental concerns of its use as building material is the radon exhalation. The aim of this study is to measure the radon exhalation rate from plates
Since phosphogypsum potentially contain radioactive elements, the application of an activity concentration index to the phosphogypsum employed in the building was carried out. A new process (patent applied) that works equally well with both plaster of mineral gypsum and phosphogypsum for the preparation of gypsum components, UCOS, has been developed.
The phosphogypsum (factory .Over 6 million tons of PG is produced per annum in India and poses various environmental and storage problems. Out of these some quantities are utilized for of production of ammonium sulphate and few for other uses, there
The natural radioactivity level in the wastephosphogypsum 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 Raequivalent index in the final byproducts.
High Strength Phosphogypsum and Its Use as a Building Material AIP Conference Proceedings 1034, 307 (2008); https Since phosphogypsum potentially contain radioactive elements, the application of an activity concentration index to the phosphogypsum employed in the building was carried out.
· The presence of radionuclides puts restrictions on the use of phosphogypsum in building materials and in soil amendments. The Brazilian regulatory body ruled that phosphogypsum would only be permitted for use in agriculture or in the cement industry if the concentration of 226 Ra and 228 Ra does not exceed 1 Bq g −1 ( CNEN, 2014 ).
Phosphogypsum can replace some of the natural components of building materials. However, it contains a higher radioactivity concentration than the natural products and its use in houses may lead to increased radiation doses to the inhabitants.
buildings materials and industrial byproducts used for building materials in the EU [2] The recycling of phosphogypsum (PG) in the building industry could be a solution for the environmental problem created in the vicinity of fertilizer factories located in Huelva(Spain) as PG is used extensively in cement, wallboard, and other building
In spite of radioactivity levels, the phosphogypsum has been used as a building material in Europe, Japan, Brazil, Belgium, Spain, and Australia (Mazzilli and Saueia 1999; Maduar et al. 2008).
phosphogypsum use as building material [norm viii rio de janeiro 2016 therefore, its safe utilization requires an evaluation of the radiological impact in dwellers, which comprises the evaluation of internal exposure due to radon inhalation and external exposure due to gamma radiation.
Use of phosphogypsum tar based material in the manufacture of building products S. Chouaya1,3, M. A. Abbassi2, R. Ben Younes 3, S. Abderafi4 This present study aimed to prepare a binding material using two wastes: phosphogypsum and tar obtained from pyrolysis of used tires described in a previous study by Chouaya et al. [19].
phosphogypsum not only solves environmental problems but also provides a new resource for construction industry. Keywords: Phosphogypsum, Solid waste, Environmental pollution, Building material. I. Introduction Traditionally materials like clay, sand, stone, gravels, cement, brick, block, tiles, distemper, paint, timber and steel are being
The optimal mixture of the materials was obtained, the solidified material have a sulfur/phosphogypsum ratio of 1: and sulphur/mud of 1:1 with a
Nowadays waste dumps of phosphogypsum take about 1500 hectares of fertile land and amount to 300 mln tonnes. Existing methods of processing are too labourand energyconsuming, what didn''t lead to widespread use of phosphogypsum. Phosphogypsum waste continue to be stored in waste dumps, disperse on the wind and create ecological problem in the regions of storage.
The authors are grateful to the Spanish National RDI Plan (Project CTQ/PPQ) for the financial support of this study. We also thank M. Sánchez Sánchez from Technology Department of CIEMAT for his help in the uranium analysis. Finally, Hanan Tayibi is
According to previous studies, the use of unprocessed phosphogypsum in building materials causes deterioration of their properties, therefore processing is required.
Valorisation of phosphogypsum as building material: Radiological aspects 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 those uses.
Only the phosphogypsum from industries A and C would exceed the limit of 1 â 1. radon for ventilation rate in the interval of to 2 exchanges per hour, Si = surface fraction for radon and thoron sources, CRa,i = radioactivity concentration in a building of type i material, in â 1, ERn,i = radon exhalation rate from i building material (â â 1 per â 1), i = index
Phosphogypsum, a waste byproduct derived from the production of phosphoric acid, is being worldwide stockpiled, posing concerns about the environmental problems originating from this practice. Considerations about the viability of the safe reuse of this material have been raised, among them its potential use as building material.
Gypsum is one of the widely used construction material mainly in interior designing. Properties and products of gypsum to be used as building material in construction works are discussed.
The problems of reducing impurities of phosphorus and fluorine in the manufacture of building materials from phosphogypsum are considered. Comparative experimental studies of the presence of phosphorus impurities for the initial phosphogypsum of the Dnieper Mineral Fertilizer Plant, calcined phosphogypsum and mixtures of phosphogypsum were carried out.
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