— 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. …
— Current demand for waste recycling, phosphogypsum-based excess-sulphate slag cement (PESSC) as a sustainable cement prepared by solid wastes, urges …
— 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). …
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 …
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 …
— 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 …
— 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 …
— 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 …
— The discussion on the process parameters of phosphogypsum cement micro silica fume system (PGCF) light soil and phosphogypsum cement slag powder system (PGCS) light …
— Phosphogypsum (PG), a by-product of phosphoric acid, is sensitive to the variation in water content. Therefore, this paper aims to investigate the use of hemihydrate PG (HH) mixed with a fine lateritic soil (S) and cement (C) considering the mechanical and durability characteristics in wet and dry cycles.
— 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.
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
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 …
— 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 …
— The data were selected from a comprehensive literature review, focusing on research on the feasibility of formulating HCBPG (Hydraulic Cement Based on …
— Traditional Portland cement is widely used in the preparation of various hydraulic concrete. However, the high alkalinity produced by cement hydration threatens the survival of aquatic animals and plants. In this paper, a new eco-friendly, ultra-low alkalinity, cementitious material was prepared with industrial waste phosphogypsum, granulated …
— 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 …
— Abstract. Phosphogypsum (PG: CaSO 4 ·2H 2 O) is a waste product generated by the phosphate industry. World production of this waste exceeds 200 million tonnes per year. PG, discharged into the sea, watercourses or in wilderness stocks, contains toxic elements harmful to ecosystems and human health, including heavy …
— Determine the physical, chemical, and radioactive properties of phosphogypsum. Discuss the uses of phosphogypsum in agriculture as a fertilizer, …
— 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 …
— Abstract. The present research aims to understand the cement hydration and microstructure formation mechanism of calcined phosphogypsum (CPG) supplemented calcium sulfoaluminate (CSA) pastes cured under hot-weather temperatures and to ensure the appropriate application and effective service of CSA cement-based materials, as well …
— 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 …
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 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 …
— 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 …
— 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 …
— Also, make a note of the ratio of phosphogypsum to cement that can be used in a standard concrete mix. This is an important factor to consider. For this purpose, compressive strength, flexural strength, water absorption, and workability of cubes of fresh and hardened concrete were evaluated after 7 and 28 days. The M25 design mix was …
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 ...
— 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 …
— IFA and PG is used as partial alternatives to cement and to study concrete waste recycling. The strength of compression of concrete is enhanced by replacing cement up to 10 % by IFA. The strength of concrete with 5 and 10 percent IFA replacement to the cement improved by 1.66 % and 2.97 % on the 28th day of curing, respectively.
— 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 …
— 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. …
— Excess-sulphate phosphogypsum slag cement (ESPSC) binders were prepared with PG, slag, and cement. To study the influence of PG type and cement content, original PG and ground PG were applied, and the cement content varied from 5.5 wt% to 10 wt%. Detailed information about the mix design is summarized in Table 2. Original PG …
— 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 …
— Phosphogypsum (PG) is a calcium sulphate dihydrate and a by-product of the phosphate fertilizer industry. It is produced in huge quantities (300 MT/year), but only 15% of the PG produced is recycled. ... practiced in several countries (USA, Europe, Middle East, Africa); PG has been used as an alternative raw material for cement, to increase …
— 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 …
