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. …
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 …
The application of cement stabilized phosphogypsum soil (CSPS) in highway engineering has great economic and social benefits. There are few corresponding classification standards for water ...
The accumulation of phosphogypsum (PG) has become a significant environmental and economic challenge, making PG reuse an urgent concern. This study aims to explore the potential of combining PG with steel slag (SS), ground granulated blast-furnace slag (GGBS), and cement clinker (CC) to create excessive-sulfate …
The present paper deals with the experimental investigation on compressive, tensile and flexural strength characteristics of partially cement replaced phosphogypsum concrete using 0%., 10%, 20% ...
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.
"Loess stabilization using cement, waste phosphogypsum, fly ash and quicklime for self-compacting rammed earth construction." Constr. Build. Mater. 231 (Jan): 117195.
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.
Phosphogypsum. Phosphogypsum is the primary waste byproduct of the wet-acid process for producing phosphoric acid. During this process sulfuric acid dissolves phosphate rock creating a solid/liquid mixture (slurry) of phosphoric acid and calcium sulfate (phosphogypsum). ... Portland cement and concrete (banned by the state of Idaho in …
For the sake of effectively reducing the accumulation of phosphogypsum, mixtures were prepared with cement as a curing agent and mass ratios of cement to phosphogypsum of 1:1, 1:2 and 1:3 (low ...
Such as using phosphogypsum as set retarder in Portland cement [8], soil stabilization [9], phosphogypsum plates [10], anhydrite cement [11], lime–fly ash–phosphogypsum binder [12], high-strength gypsum [13], calcium sulfate whiskers [14], hollow blocks [15], cementitious material [16], non-fired bricks [17] etc. However, in …
Bayer Red mud (BRM) and phosphogypsum (PG) are known as two main industrial wastes around the world. Previous studies have demonstrated the contribution of BRM and PG in cement-based hydration reactions, but their collaborative role is still pending in cement-stabilized dredged soil.
The present research aims to understand the cement hydration and microstructure formation mechanism of calcined phosphogypsum (CPG) supplemented …
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
Different percentages of cement have been replaced with raw phosphogypsum in cement, cement mortar, cement concrete on equal dry weight basis. 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 …
The unconfined compression strengths of the cement stabilized soil with phosphogypsum content of 1.4% to 8.6% were approximately 1.7 to 9.4 times of those without phosphogypsum. Particularly, the ...
In the investigation reported here, treatment of phosphogypsum with aqueous ammonium hydroxide solutions was tried to purify phosphogypsum and render it suitable for cement manufacture. The treatment converts phosphatic and fluoride impurities into water-soluble ammoniated compounds which can be removed with a stream of water.
Phosphogypsum can be used as a partial replacement for cement in conventional concrete mixes, although its strength is diminished by the presence of …
The present study investigated the effect of partial Portland cement replacement by mineral admixtures including silica fume, fly ash and purified phosphogypsum at different proportions on the mechanical properties of mortar such as compressive strength and flexural strength, and on the initial setting time using the …
In the investigation reported in this paper, treatment of phosphogypsum with aqueous citric acid solution was attempted to purify phosphogypsum and improve its …
Efficient removal of phosphate impurities in waste phosphogypsum for the production of cement. Sci. Total Environ., 780 (2021), Article 146600, 10.1016/j.scitotenv.2021.146600. View PDF View article View …
Section snippets Methodology. This work provides a literature review of the most relevant advances on cement-based phosphogypsum. The data are analysed following these steps: (i) collection of data, (ii) the classification of data according to specific topics, (iii) the organization of data in the form of tables and graphs, (iv) description of …
Compressive strength of concrete The concrete strength was designed for 28 MPa and calculated cement was replaced by phosphogypsum at 0%, 2%, 5%, 10% and 15% in terms of weight. Compressive strength test results of …
as an alternative raw material for cement, to increase the strength of the concrete and as an anti-cracking agent (Al-Hwaiti et al. 2005; El Rafie et al. 2020; Folek et al. 2011; Tayibi et al. 2009; Turner 2013). Phosphogypsum is currently marketed in Brazil, China, Spain, India, Kazakhstan,
The utilization of the phosphogypsum (PG) as cement retarder is both an economical and an ecological approach to treat this solid waste. Cement using raw PG …
Cemented backfill is an effective means to increase ore recovery, improve safety conditions, and reduce surface disposal of solid wastes. As a typical solid waste, phosphogypsum (PG) is the by ...
There have been many studies worldwide on using ground granulated blast furnace slag combined with phosphogypsum (PG) to replace binder (B) in making concrete. ... The concrete mix has good ...
Phosphogypsum is strong in the production of phosphoric acid, which is a major component of many fertilizers, the chemical industry. To protect the environment, many efforts are being made to use a variety of solid waste to use it in concrete production..
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 …
The Industrial Waste (phosphogypsum) is a waste product which was produced from the chemical industries. This waste material is used in concrete.
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.
Phosphogypsum (PG) is a waste (or by-product) of the production of phosphoric acid, a basic constituent in the manufacturing of modern fertilizers. The …
5 PG as admixture for Portland cement 5.1 Phosphogypsum as mineralizing admixture The use of PG as mineralizer at Portland cement clinker calcination is known in many countries (Japan, Russia, Lithuania and others). Adding 2 to 3% of PG (1% of SO) )
