This experimental study suggests that phosphogypsum from industrial waste can be used as a cement substitute in concrete production. After 7 and 28 days, …
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 …
Mortars and concretes produced with PG-based cementitious systems achieve high compressive strength levels (60 MPa, 70 MPa, 80 MPa) and accomplish …
@article{Liang2023StudyOT, title={Study on the properties of an excess-sulphate phosphogypsum slag cement stabilized base-course mixture containing phosphogypsum-based artificial aggregate}, author={Yangshi Liang and Bin Guan and Tingwei Cao and Gang Liu and Pei Tang and Minghao He and Mohamed F. Cheira and …
The sample of PG used in the study was obtained from a phosphate fertilizer plant in Yunnan, China. ... For CSA cement production, ... Treating waste phosphogypsum for cement and plaster manufacture. Cem …
Phosphogypsum (PG) is a by-product of phosphoric acid production from phosphate rocks, containing radioactive elements and impurities. This review examines …
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). …
Phosphogypsum (PG: CaSO4·2H2O) is a waste product (or by-product) from the production of phosphoric acid, the main component in the production of concentrated simple and complex fertilizers. The world production of phosphogypsum exceeds 200 million tons per year. PG discharged into water bodies (seas, rivers) or …
Phosphogypsum (PG) is reused as aggregate in the cemented backfill, which effectively improves the PG reutilization efficiency.
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...
Shuhua Liu et al. [12] added phosphogypsum neutralized by lime to persulfate cement, which accelerated the hydration process of the persulfate cement, shortened the time required for setting, and ...
1. Introduction. Phosphogypsum (PG), the main component is gypsum (CaSO 4 •2H 2 O), is a primary by-product during the production of the phosphate fertilizers (Chernysh et al., 2021; Wang et al., 2020).In addition to gypsum, there are also lots of impurities in phosphogypsum, such as organic matter, SiO 2, soluble fluorine, …
At present, phosphogypsum production is significant in China, with the top five provinces being Hubei, Yunnan, Guizhou, Sichuan and Anhui [1]. The random discharge and accumulation of phosphogypsum has seriously damaged the ecological environment, which not only polluted the groundwater resources, but also caused a …
DOI: 10.1016/j.jobe.2024.108483 Corpus ID: 267007670; Study on the mechanical properties, microstructure and hydration mechanism of phosphogypsum-based geopolymer cement with added micron-sized silica particles
whereby 5 tons of phosphogypsum are generated for every ton of phosphoric acid. As worldwide rock phosphate production increases and P 2 O 5 consumption from fertilizers rises, global phosphogypsum output is expected to reach 100–280 Mt per year (Yang et al. 2009).. Phosphogypsum contains significant …
Most of the phosphogypsum used in the production of Fig. 2 came from the RSA Mart Kanpur in the Indian state of Uttar Pradesh. RSA Mart's Phosphogypsum is available in an off-white hue. Phosphogypsum (Phosphate of Gypsum) powder is white and has a specific gravity of 2.3 % to 2.6 %.
Phosphogypsum could be used as a substitute of natural gypsum in the production of Portland cement to control the hydration reaction rate of cement. In this study, raw phosphogypsum was collected ...
Phosphogypsum (PG) is an industrial waste from the production of phosphoric acid.The impurities in PG limit its utilization in building materials, and make PG decompose easily at high temperatures. Calcium sulphoaluminate (CSA) cements are insensitive to the presence of impurities and show some desirable performance. The aim …
The optimal mix proportions for two types of lightweight soil, namely phosphogypsum cement microsilica (PGCF) and phosphogypsum cement slag …
In recent years, many scholars had put forward a new idea in which the New Suspension Preheater Cement Production Technique (or NSP) would be used to decompose phosphogypsum to produce vil and ce...
China also has significant production of phosphogypsum, and the five largest provinces in terms of production are Hubei, Yunnan, Guizhou, Sichuan, and Anhui [5]; hence, they these also have large ...
Phosphogypsum (PG) is a solid by-product generated in the production of phosphoric acid (PA) using conventional synthesis methods. The raw material, about 50 times more radioactive as compared to unperturbed soils, is dissolved in diluted sulfuric acid (70%) forming PG and PA. ... cement, plasterboard, and agricultural additives). However ...
This study contributes to sustainable construction practices by exploring the use of phosphogypsum, a commonly discarded byproduct, in the production of recycled aggregates. Addressing both environmental and economic aspects of sustainability, we investigate the feasibility of employing phosphogypsum as a primary raw material, in …
The incorporation of phosphogypsum (PG) in magnesium potassium phosphate cement (MPPC) can promote the utilization of PG not only by utilising the phosphate impurity in PG, but also by immobilising the heavy metals with MPPC. This paper investigates the feasibility of the incorporation of PG in preparing MPPC. Both early age …
This paper examines the production of Portland cement CEM II using heat-treated slate waste. The fineness index results were 10.95 % for the 75-μm sieve and …
Eco - concrete made with phosphogypsum-based super sulfated cement Nguyen Ngoc Lam-Effect of curing temperature and particle size distribution on unconfined ... production in Yunnan, Guizhou, Sichuan and Hubei provinces was 12.53 Mt, accounting for 73.3% of the total production. The production in these provinces increased by 3.2% compared …
In recent years, many scholars had put forward a new idea in which the New Suspension Preheater Cement Production Technique (or NSP) would be used to …
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 …
Phosphogypsum (PG) is a bulk industrial solid waste generated during phosphoric acid manufacturing. This study investigated a novel phosphogypsum-based geopolymer (PBG) cement through L 16 (4 5) orthogonal experiments.The impact of five alkaline activators, including Portland cement clinker (PCC), sulfate alumina cement clinker (SACC), …
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 a part of cement to be suitable for the concrete, for workability and 28 days compressive strength varying from 15 N/ mm 2 to 25 N/ mm 2 .
Distribution of phosphogypsum in China. In 2014, total phosphate fertilizers (as P2O5) production in China was 17.09 Mt. The aggregate production in Yunnan, Guizhou, …
Ordinary Portland cement (OPC cement) is a crucial material for civil and building engineering and is widely used in making concrete, mortar, and other products 1.More than 98% of the OPC 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…