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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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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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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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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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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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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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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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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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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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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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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 (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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Phosphogypsum (PG) is an industrial by-product gypsum produced by the phosphorus chemical industry, which contains a variety of impurities including acids, fluorides, organics and others (Cuadri et al., 2014; Qin et al., 2023; Wu et al., 2022a).Statistics show that wet production of 1t of phosphoric acid produces 4.55 t ∼5 t of PG (dry basis) (Rashad, 2017).
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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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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 …
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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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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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This work provides a literature review of the most relevant advances on cement-based phosphogypsum.
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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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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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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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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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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 retarder has two problems pressing for solution,namely, delaying the setting time and difficulty being fed into the cement mill.
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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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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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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...
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
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.
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
Phosphogypsum can be chemically treated and become more suitable for the use of cementitious systems at a large scale in a more economical way.
WhatsApp: +86 18221755073
The main reason for this is that the sulfate in phosphogypsum can cause the composite cementitious material to generate a large amount of ettringite and accelerate the dissolution of red mud and ...
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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 …
WhatsApp: +86 18221755073
This work provides a literature review of the most relevant advances on cement-based phosphogypsum.
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The aim of this paper is to study the potential of producing CSA cement with PG and the decomposition behavior of PG during the production of CSA cement. Experimental results indicated that PG can be utilized to produce CSA cement, and the suitable firing temperature is between 1250 and 1300 °C. Results also show that the decomposition of PG ...
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