— 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 …

 — DOI: 10.1016/j.conbuildmat.2024.136359 Corpus ID: 269576289; Research on the application of phosphogypsum in magnesium oxysulfate cement: A comparison with sand @article{Li2024ResearchOT, title={Research on the application of phosphogypsum in magnesium oxysulfate cement: A comparison with sand}, author={Bin Li and Bing-Xin …

 — Current demand for waste recycling, phosphogypsum-based excess-sulphate slag cement (PESSC) as a sustainable cement prepared by solid wastes, urges …

 — 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 …

 — 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) …

 — The unconfined compressive strength (UCS), split tensile strength (STS), freeze-thaw cycles, and shrinkage tests were used to evaluate the mechanical …

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

 — The objectives of this study are: (1) to investigate the effect of phosphogypsum on the physiochemical behaviour of the cement stabilized soil; (2) to …

Collaborative eects of red mud and phosphogypsum on geotechnical behavior of cement‑stabilized dredged clay Jianwen Ding1 · Xing Wan1 · Ning Jiao1 · Sai Zhang1 · Weihang Chen 1 Received: 28 August 2023 / Accepted: 17 April 2024 / Published online: 25 April 2024 ... cement, two by-products (RM, PG), air-dried clay at pre-

 — The physical-chemical properties, mechanical behaviour and environmental impact of these phosphogypsum-based cement mortars were determined. It was concluded that the phosphogypsum treatments and curing conditions influence the mineralogical transformations of mortars and therefore also the mechanical behaviour of the mortars …

 — Phosphogypsum (PG), as an industrial by-product, has historically suffered from challenges in achieving efficient utilization, resulting in enormous accumulation and environmental contamination. In this study, a certain proportion of PG was employed as a substitute for sand in magnesium oxysulfate cement (MOSC). The effects of PG on the …

 — 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 …

 — The cement pastes hydrated in tap water generally gave higher compressive strength values than those of aged in seawater. The cement paste containing 85 % BFS, i0 % PA and 5 % PCC produced the highest strength values Vol. 23, No. ] SUPERSULPHATED CEMENT, PHOSPHOGYPSUM, STRENGTH 119 80 °7o -1- Z LU …

 — Based on the physical and chemical properties of red sandstone (RS), RS is used to produce composite cementitious materials. The flowability, mechanical strength, and micromechanics of a red sandstone–cement binary cementitious material (RS-OPC) were investigated as functions of the amount of RS replacing the cement (OPC). …

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 ...

 — The addition of CPG at elevated curing temperature (35 °C and 50 °C) significantly improved the compressive strength of CSA cement pastes. The growth rate …

The effects of the tricalcium aluminate (C 3 A) content of the stabilizing cement [Type II (1.3% C 3 A) cement and Type III cement (9.3% C 3 A)], curing time (seven to 90 days), proportion of PG (5–60%), grain size, and impurities in phosphogypsum (PG) (PG compared to gypsum) on the microstructural (by scanning electron microscopy) and …

 — Mineral processing tailings (e.g., powered rock dust and phosphogypsum-PG) control the budget of NPs on a global scale and thus affect physical and biogeochemical processes in terrestrial and marine environments (Dalmora et al., 2016; Lütke et al., 2020) and the atmosphere including the nucleation of clouds (Retallack, 2011, 2012; Marshall …

 — Phosphogypsum (PG) is a radioactive industrial by-product produced in large quantities when processing phosphate ores into fertilizers. With rapid growth of high concentration phosphate and compound fertilizers production in China, PG production is increasing every year. ... Eco - concrete made with phosphogypsum-based super …

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

 — Excess-sulphate phosphogypsum slag cement (EPSC) is a hydraulic cementing material prepared by mixing or ball milling high content phosphogypsum (PG) with 40%–50% ground granulated blast-furnace slag (GGBS) and a small amount of alkali activator [1,2]. The production of this new binder not only effectively consumes solid …

 — 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 …

 — 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

 — In phosphogypsum, P 2 O 5 generally exists as H 3 PO 4, Ca(H 2 PO 4) 2 ·H 2 O, CaHPO 4 ·2H 2 O and Ca 3 (PO 4) 2.P 2 O 5 found adhered to the surface of gypsum crystals is water-leachable, whereas P 2 O 5 present in the crystal lattice is difficult to be removed by simple water washing. The fluorides are normally present as a mixture of …

 — This paper investigated two systems of lightweight soil, namely phosphogypsum cement and microsilica system (PGCF) and phosphogypsum cement and slag powder system (PGCS), which are …

 — 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.

 — The objective of this paper is to investigate the coupling effect of cement and organosilicon hydrophobic agents on the water resistance of phosphogypsum. Different weight ratios of Portland …

Singh, Treating waste phosphogypsum for cement and plaster manufacture, Cement and Concrete Research 32(7) (2002) 1033-1038. [12] M. Singh, Role of phosphogypsum impurities on strength and microstructure of selenite plaster, Construction and building materials 19(6) (2005) 480-486. [13] M. Taher, Influence of thermally treated …

 — Phosphogypsum (PG) is a synthetic by-product created during the commercial manufacture of phosphoric acid by the wet process. ... Characterization and purification of waste phosphogypsum to make it suitable for use in the plaster and the cement industry. Yassine Ennaciri Laboratory of Physical Chemistry of Materials …

 — 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. ... On the other hand, group 3 and 4 cannot be used for plasterboard production but could be utilized in the cement industry or in agriculture. …