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Resource utilization and development of phosphogypsum …

Phosphogypsum (PG) is a bulk industrial solid waste of wet-process phosphoric acid production. Every ton of phosphoric acid production generates as many as 4–6 tons of PG, including more than 90% of CaSO 4 ·2H 2 O, a small amount of phosphorus, fluorine, organic matter, oxides, heavy metals, radioactive substances and other impurities that have serious …

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Potential uses of phosphogypsum: A review

The aim of this study is to give an overview and to evaluate the existing and potential uses of PG that extend from soil stabilization to cement and chemical industry and for agricultural to geotechnical, human impacts, and environmental applications.

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Valorization of phosphogypsum in cement-based materials…

China is a significant producer of phosphogypsum production; the annual growth rate of phosphogypsum is about 70 million metric tons, of which the comprehensive utilization rate is only 15 percent.

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Properties, Purification, and Applications of Phosphogypsum: …

Phosphogypsum (PG) is a solid grey, moist, fine-grained by-product powder generated during the production of phosphoric acid which has the chemical formula H 3 PO 4 …

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Valorization of phosphogypsum in cement-based materials…

This work provides a literature review of the most relevant advances on cement-based phosphogypsum.

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Effect of Synergistic Modification of Building …

Alpha-hemihydrate phosphogypsum (α-HPG) is a cementitious material obtained by dehydration of phosphogypsum (PG), a byproduct of phosphoric acid production. Poor water resistance of α-HPG has usually …

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Efficient removal of phosphate impurities in waste phosphogypsum …

Phosphogypsum (PG) is an industry solid waste produced from phosphoric acid manufacture. To reduce environmental pollution of the PG, H 2 C 2 O 4 was employed to purify it, which then can be used for cement production. The optimal concentration of H 2 C 2 O 4 for PG purification was determined. In addition, differential thermal analysis (DTA), X-ray …

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Resource utilization and development of phosphogypsum …

In the co-production of sulfuric acid and cement, calcium sulfate in PG was decomposed at high temperature to sulfur dioxide and calcium oxide; the former was used to …

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Properties, Purification, and Applications of Phosphogypsum…

Phosphogypsum for Carbon Dioxide (CO 2) Capture. Significant amounts of free calcium ions are present in the hydrolysis solution of the product of PG decomposition via chemical or thermal process. As a result, the hydroxide ions can be used to produce calcium carbonate and capture CO 2.

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Value-added utilization of phosphogypsum industrial by …

In recent years, many scholars have conducted research on the preparation of light aggregates from phosphogypsum and their application in concrete production [16], [17].For example, Wang et al. [8] had developed light aggregate containing 80% or more phosphogypsum, and the aggregate is applied to the road base. The prepared phosphogypsum aggregate had …

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Phosphogypsum-Based Ultra-Low Basicity Cementing Material

In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared with industrial waste phosphogypsum, granulated ground blast slag (GGBS) and sulphoaluminate …

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Valorization of phosphogypsum in cement-based materials…

Phosphogypsum can be chemically treated and become more suitable for the use of cementitious systems at a large scale in a more economical way.

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Valorization of phosphogypsum in cement-based materials: …

Phosphogypsum can be chemically treated and become more suitable for the use of cementitious systems at a large scale in a more economical way.

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Phosphogypsum: potential uses and problems – a …

Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. In this study, raw phosphogypsum was...

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Treated phosphogypsum as an alternative set regulator and mineral

This work showed that phosphogypsum can be used in cement production both as set regulator and supplementary cementitious material to replace natural gypsum. ... Utilization of borogypsum as set retarder in Portland cement production. Cement Concr. Res., 32 (3) (2002), pp. 471-475. View PDF View article View in Scopus Google Scholar.

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Phosphogypsum: potential uses and problems – a review

Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. In this study, raw phosphogypsum was...

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Potential uses of phosphogypsum: A review

The aim of this study is to give an overview and to evaluate the existing and potential uses of PG that extend from soil stabilization to cement and chemical industry and for agricultural to …

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Utilization of solidified phosphogypsum as Portland cement …

The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste. Cement using raw PG as …

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Phosphogypsum

Building elements made of phosphogypsum, such as wallboards and similar construction elements, give yield to high values of radon emanation together with the mentioned elevated concentrations of 226 Ra. Phosphogypsum can be used in Portland cement as a setting time retarder in amounts below 4–5 wt%; then, it is diluted in the concrete and ...

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Study on the Phosphogypsum Proportion in ed Concrete …

Phosphogypsum is a solid waste generated during wet phosphoric acid treatment, and the use of phosphogypsum blending instead of cement in concrete production can effectively reduce carbon dioxide ...

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Effect of Synergistic Modification of Building Materials Based …

Alpha-hemihydrate phosphogypsum (α-HPG) is a cementitious material obtained by dehydration of phosphogypsum (PG), a byproduct of phosphoric acid production. Poor water resistance of α-HPG has usual...

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Valorization of phosphogypsum in cement-based materials: …

This work provides a literature review of the most relevant advances on cement-based phosphogypsum.

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Effect of Phosphogypsum on the Properties of Portland Cement

Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. ... 10% of the Portland cement can be replaced ...

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Effect of Phosphogypsum on the Properties of Portland …

The beneficiated phosphogypsum can be used as an additive in place of mineral gypsum in the manufacturing of Portland cement and Portland slag cement. Phosphogypsum …

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Resource utilization and development of phosphogypsum …

In the co-production of sulfuric acid and cement, calcium sulfate in PG was decomposed at high temperature to sulfur dioxide and calcium oxide; the former was used to produce sulfuric acid, while the latter was used to produce Portland cement.

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Phosphogypsum-Based Ultra-Low Basicity Cementing Material

As Portland cement concrete is widely used in the construction of artificial coastal zones and islands, the pH value of pore solution of Portland cement concrete material is higher than 13, but most terrestrial and aquatic animals and plants live in …

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Effect of phosphogypsum on physiochemical and …

It has been widely accepted that the improvement of engineering properties of cement stabilized soil was attributable to the soil–cement–water reaction, which produced primary and secondary cementitious materials in soil. 3, 37, 38 Hence, the analysis on the mineralogical composition of cement and phosphogypsum stabilized soil can provide a ...

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Recycling of phosphogypsum for low-carbon cement: Clinker production …

The cement industry accounts for about 8 % of the world's total CO 2 emissions [[78], [79], [80]], highlighting the urgent need to reduce CO 2 emissions from cement production. This paper proposes a low-carbon phosphogypsum-based sulfoaluminate cement (PGSAC) utilizing PG, with its production process, properties, and hydration activity verified ...

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Effect of Phosphogypsum on the Properties of Portland Cement

The beneficiated phosphogypsum can be used as an additive in place of mineral gypsum in the manufacturing of Portland cement and Portland slag cement. Phosphogypsum-slag based aggregate was prepared and tested for compressive, flexural and splitting tensile strength by using in concrete.

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Potential use of phosphogypsum in concrete

An experimental study was conducted to investigate the potential use of phosphogypsum (PG) in concrete. This was accomplished by preparing mortar mixes at a water/cement ratio of 0.6 using two types of cement, ordinary Portland cement (OPC) and pozzolanic Portland cement (PPC), and two types of fine aggregate, natural river sand and …