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Red mud (RM) and phosphogypsum (PG) are two typical industrial waste around the world, which are being generated and landfilled massively per year. This study investigates the collaborative effects of RM and PG on geotechnical properties of cement-stabilized dredged clay. Unconfined compressive strength (UCS) tests, isotropically …
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Excess-sulfate phosphogypsum slag cement (ESPSC) is a low-carbon cementitious material. It comprises 40–50 % PG, 30–40 % granulated blast furnace slag, and a small amount of cement as an activator [16]. The ESPSC exhibits excellent later-age compressive strength [17], sulphate resistance [18] and water resistance [19].
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DOI: 10.1016/j.conbuildmat.2024.136513 Corpus ID: 269887811; Excess-sulphate phosphogypsum slag cement blended with magnesium ion: Part Ⅱ-the long-term microstructure characterisation and phase evolution
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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 …
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Phosphogypsum is used in agriculture for soil amendment or as fertilizer, as well as in the brick and cement industry, and in road construction. Keywords: Phosphogypsum
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Phosphogypsum (PG) is a solid waste product that is generated in the phosphoric acid manufacturing process, most of which is currently sent to landfills rather than reused. In this study, beta-hemihydrate phosphogypsum (β-HPG), slag, fly ash (FA) and alkali activator were mixed to form a phosphogypsum-based geopolymer (PBG) …
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DOI: 10.1016/j.jobe.2024.110008 Corpus ID: 270683037; Mechanical properties and environmental implications of excess-sulfate cement concrete with phosphogypsum-based cold-bonded fine aggregates
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The unconfined compressive strength (UCS), split tensile strength (STS), freeze-thaw cycles, and shrinkage tests were used to evaluate the mechanical …
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Some studies showed that the soluble phosphorus and fluorine in the PG would react with Ca(OH) 2 produced by cement hydration and then generate precipitates coating the surface of the cement particles, which would restrict cement hydration causing longer setting time and lower early strength [38], [39], [40]. Therefore, it is essential to …
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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 …
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The aim of the tests in this paper is to investigate the shrinkage properties of phosphogypsum-cement mixtures and the influence of thefactors, such as moisture content (MC), phosphogypsum/cement ratio (P/C), curing conditions, the relation between shrinkage and moisture loss, comparison of shrinkages of the compacted and vibrated …
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Pinto et al. [46] also observed the sharp mass gain (11.89%) in the phosphogypsum-based supersulfated cement mortar after 20 weeks of MgSO 4 attack, which was mainly attributed to the formation of ...
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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 …
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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. …
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Phosphogypsum treated by this means could successfully replace natural gypsum in Portland cement. Introduction Phosphogypsum is a by-product of the manufacture of phosphoric acid by a wet chemical ...
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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 …
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Phosphogypsum can be used as a partial replacement for cement in conventional concrete mixes, although its strength is diminished by the presence of …
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Materials. This study evaluated representative samples of PG and composite binder in Guizhou, China. The binder is composed of yellow phosphorous slag: fly ash: cement clinker in 4:1:1, and 16 ...
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The data were selected from a comprehensive literature review, focusing on research on the feasibility of formulating HCBPG (Hydraulic Cement Based on Phosphogypsum) and the application in building materials.
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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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Properties of phosphogypsum were evaluated and then the effect of various level phosphogypsum addition (2, 5, 10 and 15 percent by weight of cement) with Portland cement clinker was investigated.
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1. Introduction. Supersulfated cement (SSC) is a binder with little Portland cement clinker. It is usually made up of 75–85 % granulated blast furnace slag (GGBFS), 10–20 % calcium sulfate, and less than 5% alkaline activator [1], [2], [3], [4].SSC is a low-carbon cementitious material, and its main raw material, slag, comes from a by-product …
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3. Results and discussions3.1. Physical properties. Fig. 1 shows the variation of water content for cement and phosphogypsum stabilized soil after 28 days of curing. The graph showed a remarkable reduction in water content for stabilized soil in comparison with the initial soil slurry without cement and phosphogypsum binders.
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cement from phosphogypsum and phosphatic tailings sand. SO2 would have been produced as a by-product for conversion to sulphuric acid, The process was not successful in that it was not possible to obtain the high-quality cement product. With the funding of "Gypsum By-Product Exploitation," the Institute
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Eco-friendly Super Sulphated Cement Concrete Using Vietnam Phosphogypsum and Sodium Carbonate Na2CO3. November 2022; Civil Engineering Journal 8 ... The concrete mix has good …
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The resource utilization of phosphogypsum (PG) can reduce the consumption of resources, turn waste into valuables, turn damage into profit, and form a …
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DOI: 10.1016/j.conbuildmat.2024.136293 Corpus ID: 269298465; Retardation mechanism of phosphogypsum in phosphogypsum-based excess-sulfate cement @article{Wu2024RetardationMO, title={Retardation mechanism of phosphogypsum in phosphogypsum-based excess-sulfate cement}, author={Yi Wu and Fang Xu and …
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Current demand for waste recycling, phosphogypsum-based excess-sulphate slag cement (PESSC) as a sustainable cement prepared by solid wastes, …
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article valorisation of phosphogypsum in concrete (Non-Load . Bearing Concrete ). J Chem Pharm Res 11:55–65. 13. Bchitou R, Chafik D, Bouhaouss A (2014) solutions by phospho-
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1. Introduction. 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 …
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Phosphogypsum (PG) is a type of synthetic gypsum generated during the production of phosphoric acid. Each ton of phosphoric acid generates 5 tons of phosphogypsum. This …
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Exploring the utilization of phosphogypsum holds promise to reduce the burdens on environment. • MOC samples with phosphogypsum and KH 2 PO 4 exhibit lower cost and carbon emissions than pure MOC samples.. The water resistance of MOC with phosphogypsum and KH 2 PO 4 gets greatly improved.. Incorporation of 1 % KH 2 PO …
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Thermal properties of soft clayey soils from the former Lake Texcoco in Mexico. Norma Patricia López-Acosta, Diana Margarita Portillo-Arreguín, David Francisco Barba-Galdámez, Rao Martand Singh ... select article Effect of phosphogypsum on physiochemical and mechanical behaviour of cement stabilized dredged soil from …
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The present paper deals with the experimental investigation on slump number of fresh concrete, 28-day compressive strength characteristics of concrete using only 10% cement, 30% - 60% phosphogypsum and granulated blast furnace slag in binders named super sulfated cement with 3 different water-binder ratios of 0.45, 0.50 and 0.55…
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The results suggest that incorporating cement-stabilized phosphogypsum and CRME into road subgrade construction not only mitigates the environmental consequences of phosphogypsum accumulation and discarded asphalt but also provides crucial raw materials for road construction. This dual benefit leads to cost savings and a …
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The optimum mass ratio of water to cement is 0.24~0.26, mass ratio of aggregate to cement is 3, and the optimum percentage range is 60%~ when aggregates with 2.36~4.75 mm particle size were ...
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