Phosphogypsum: Properties and Potential Use in Agriculture
— 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 …
Energy conservation and carbon emission reduction of cold …
— 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 …
An experimental study on cement concrete with industrial …
— 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: Properties and Potential Use in Agriculture
— Determine the physical, chemical, and radioactive properties of phosphogypsum. Discuss the uses of phosphogypsum in agriculture as a fertilizer, …
The using of waste phosphogypsum and natural gypsum in …
— Semantic Scholar extracted view of "The using of waste phosphogypsum and natural gypsum in adobe stabilization" by N. Değirmenci. ... cement and Sarooj (artificial pozzolan) on the swelling potential of an expansive soil from Oman. A. Al-Rawas A. Hago Hilal Al-Sarmi. Environmental Science, Engineering. 2005; 449. Save.
PHOSPHOGYPSUM: A Review of the Florida Institute …
— 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
Valorization of phosphogypsum in cement-based materials: …
— The data were selected from a comprehensive literature review, focusing on research on the feasibility of formulating HCBPG (Hydraulic Cement Based on …
Effect of phosphogypsum on physiochemical and …
— The objectives of this study are: (1) to investigate the effect of phosphogypsum on the physiochemical behaviour of the cement stabilized soil; (2) to …
Optimization on hydration efficiency of an all-solid waste …
— 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 …
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. ... with a small amount of cement ...
Study on the properties of an excess-sulphate phosphogypsum slag cement …
— 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 …
Research on the application of phosphogypsum in …
— 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 …
A review on the environmental impact of phosphogypsum 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 …
Mechanical Properties and Optimal Mix Design of …
— The discussion on the process parameters of phosphogypsum cement micro silica fume system (PGCF) light soil and phosphogypsum cement slag powder system (PGCS) light …
Microstructural and Phase Characteristics of Phosphogypsum-Cement
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-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. …
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
Treating waste phosphogypsum for cement and plaster …
— 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 …
concrete made with phosphogypsum-based super sulfated cement …
— 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...
Mechanical Properties and Optimal Mix Design 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 …
Valorization of phosphogypsum in cement-based materials: …
— Current demand for waste recycling, phosphogypsum-based excess-sulphate slag cement (PESSC) as a sustainable cement prepared by solid wastes, urges …
Treated phosphogypsum as an alternative set regulator and mineral
— 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 …
Collaborative effects of red mud and phosphogypsum …
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-
Incorporation of phosphogypsum with cement in rigid …
— 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 …
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 …
Effect of recycled phosphogypsum and calcium aluminate cement …
— Dredged soil and phosphogypsum (PG) are waste materials that must be treated to reduce their negative environmental effects. Guided by the concept of waste treatment, this study proposed the use of PG as a supplementary cementitious material to stabilize waste-dredged soil, and calcium aluminate cement (CAC) was selected to …
Phosphogypsum: potential uses and problems – a review
— 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 …
Phosphogypsum-Based Ultra-Low Basicity Cementing …
— 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 …
Phosphogypsum, tropical soil and cement mixtures for asphalt pavements
— 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.
Modification of recycled cement with phosphogypsum and …
— 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 …
Treated phosphogypsum as an alternative set regulator and …
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 …
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 …
Research on the application of phosphogypsum in …
— 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 …
Preparation and Micromechanics of Red Sandstone–Phosphogypsum–Cement
— 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). …
Effects of calcined phosphogypsum replacement on …
— 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 …