Effect of Modified Phosphogypsum on Properties of Cement …
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 …
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Properties, Purification, and Applications of Phosphogypsum: …
Phosphogypsum (PG) is a by-product produced during the wet process of phosphoric acid (H 3 PO 4) production from natural phosphate rocks. Approximately 4–6 tons …
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Application of lime neutralised phosphogypsum in supersulfated cement
The inevitably incorporation of P 2 O 5 impurity results in the poor quality of phosphogypsum (PG), which further hinders the utilisation of PG in manufacturing the supersulfated cement (SSC), an environment-friendly and energy-saving cement made almost entirely from industrial waste. Lime neutralisation provides a sustainable approach to remove …
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Utilization of Industrial Waste Phosphogypsum as …
Abstract Phosphogypsum (PG) is a waste product of phosphate fertilizer and phosphoric acid industries. Vast quantities of the waste product are generally left stockpiled on the ground or discharged into rivers or ponds, and pose serious environmental ...
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An investigation into the effect of various chemical and …
The cement samples containing phosphogypsum milled together with unslaked lime showed longer initial and final setting times compared with the material containing natural gypsum, as the results in Table 3 and Fig. 1, Fig. 2 show. The strengths at 2, 7, ...
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Phosphogypsum-Based Ultra-Low Basicity …
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 cement. When appropriate …
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Cement-Stabilized Phosphogypsum Synergistized with …
The unconfined compressive strength (UCS), split tensile strength (STS), freeze-thaw cycles, and shrinkage tests were used to evaluate the mechanical performance of …
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Phosphogypsum, tropical soil and cement mixtures for …
DOI: 10.1016/J.RNREC.2019.01.029 Corpus ID: 117174436; Phosphogypsum, tropical soil and cement mixtures for asphalt pavements under wet and dry environmental conditions @article{Silva2019PhosphogypsumTS, title={Phosphogypsum, tropical soil and cement mixtures for asphalt pavements under wet and dry environmental conditions}, author={Millena …
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Effect of Phosphogypsum on the Properties of …
Compressive strength of concrete The concrete strength was designed for 28 MPa and calculated cement was replaced by phosphogypsum at 0%, 2%, 5%, 10% and 15% in terms of weight. Compressive strength test results of 7 days …
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Effect of phosphogypsum on physiochemical and …
This was attributable to the hydration and pozzolanic reactions in the mixture of cement, phosphogypsum, soil and water, which consumed large amount of water. 18, 22 For a given phosphogypsum content, it is evident that the water content significantly decreased with the increase in cement content, which attributed to the larger extent of ...
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Usage of biowashing to remove impurities and heavy metals …
DOI: 10.1016/j.cej.2022.138594 Corpus ID: 251523098; Usage of biowashing to remove impurities and heavy metals in raw phosphogypsum and calcined phosphogypsum for cement paste preparation
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Eco-friendly Super Sulphated Cement Concrete Using …
Eco-friendly Super Sulphated Cement Concrete Using Vietnam Phosphogypsum and Sodium Carbonate Na2CO3. Sustainable development is one of the critical topics in the construction industry today, especially in reducing CO 2 emissions and production energy costs. There have been many studies worldwide on using ground granulated blast furnace slag ...
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Purification of Phosphogypsum for Use as Cement Retarder …
The phosphogypsum (PG) consists of 80 - 90 % of gypsum that could Purification of phosphogypsum for use as cement retarder by sulfuric acid treatment replace natural gypsum in Portland cement, however a small quantity is used, the main reasons for the low demand and use are its high moisture content and impurities such as phosphorus, fluoride ...
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Excess-sulphate phosphogypsum slag cement blended with …
The detailed manufacturing process and study strategy were described in Fig. 2, where the preparation of ESPSC pastes contained two steps, i.e., original phosphogypsum modification and new cementitious material fabrication.A mix of fresh phosphogypsum, slag, and cement with a proportion of 94:2:4 was wet-milled firstly for 30 min by a horizontal ball mill and …
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Preparation of gypsum with high purity and whiteness from …
Phosphogypsum (PG) is a solid waste product generated during wet-process phosphoric acid production. Various impurities considerably reduce the purity, whiteness, and …
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Calcium Hydroxide Washing Treatment of Jordanian Phosphogypsum …
In this study the phosphogypsum can be converted into sulfur using the second method by conversion of calcium sulfide to sulfur by applying the method of Rosenwald, Hamblin, Urban, and Zimmerman for oxidation the ammonium bi-sulfide to sulfur [31, 32]. 1.3 Phosphogypsum in Cement Industry To prepare phosphogypsum for using in cement production ...
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Phosphogypsum as a construction material
Phosphogypsum (PG) is a by-product generated from the phosphorus fertilizer industry (phosphoric acid production). PG is similar to natural gypsum, but there are some differences, of which it contains some impurities such as water-soluble phosphate (P 2 O 5), water-soluble fluoride (F −) and P 2 O 5 substituted in the gypsum crystal lattice. PG and …
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Effect of Modified Phosphogypsum on Properties of Cement …
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. Using lime neutralization to …
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Utilization of phosphogypsum for the preparation of non …
DOI: 10.1016/J.CONBUILDMAT.2013.03.070 Corpus ID: 137641227; Utilization of phosphogypsum for the preparation of non-autoclaved aerated concrete @article{Yang2013UtilizationOP, title={Utilization of phosphogypsum for the preparation of non-autoclaved aerated concrete}, author={Lin Yang and Yun Yan and Zhihua Hu}, …
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Immobilisation mechanism for nuclear waste containing …
Supersulfated cement (SSC), which features a relatively low pH value, is increasingly considered as an effective alternative to Portland cement-based material for solidifying nuclear waste. Phosphogypsum (PG), an industrial waste, can be used to prepare SSC, but the impurities may affect the efficiency of SSC for nuclear waste immobilisation.
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EFFECT OF CALCINED PHOSPHOGYPSUM IN PORTLAND POZZOLANA CEMENT CONCRETE
1PG Student, Dept. of Civil Engineering, Mar Athanasius College of Engineering, Kerala, India 2Assistant Professor, Dept. of Civil Engineering, Mar Athanasius College of Engineering, Kerala, India -----***-----Abstract Phosphogypsum (PG) is a solid by-product of the production of phosphoric acid, a major constituent of many fertilizers, chemical industry materials.
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Eco-friendly Super Sulphated Cement Concrete Using …
There have been many studies worldwide on using ground granulated blast furnace slag combined with phosphogypsum (PG) to replace binder (B) in making concrete. ... The concrete mix has good ...
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Phosphogypsum circular economy considerations: A critical …
Phosphogypsum (PG) is the primary byproduct generated during the production of phosphoric acid, an intermediate product in phosphate fertilizer production, from calcium phosphate (apatite) ore. ... In Table 1 the radioactivity of PG is compared to concrete, ceramic bricks and natural gypsum.
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Preparation and Micromechanics of Red Sandstone–Phosphogypsum–Cement
Additionally, the feasibility of producing red sandstone–phosphogypsum–cement composite materials (RS-PG-OPC) using the phosphogypsum (PG)- enhanced volcanic ash activity of RS was investigated. The products of hydration and microstructures of RS-OPC and RS-PG-OPC were analyzed by XRD, FTIR, TG-DTG, and SEM. RS enhanced the flowability of ...
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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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Use of Mixture Design Approach for the Optimization and
The present study investigated the effect of partial Portland cement replacement by mineral admixtures including silica fume, fly ash and purified phosphogypsum at different proportions on the mechanical properties of mortar such as compressive strength and flexural strength, and on the initial setting time using the mixture design approach. This research aims …
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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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Usage of biowashing to remove impurities and heavy metals …
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 ...
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UTILISATION OF PHOSPHOGYPSUM IN CEMENT MORTAR AND CONCRETE
Different percentages of cement have been replaced with raw phosphogypsum in cement, cement mortar, cement concrete on equal dry weight basis. The properties of such cement, cement mortar and concrete mixes produced compared with conventional mixes. The conventional concrete mixes have been modified to accommodate raw phosphogypsum as …
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Green and Sustainable Superhydrophobic Phosphogypsum …
Phosphogypsum (PG) is a solid waste generated by phosphate fertilizer industries that is currently used in concrete materials. However, adding PG to concrete usually results in …
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