A new eco-friendly concrete made of high content phosphogypsum based aggregates and binder: Mechanical properties and environmental benefits

Sun, Tao; Li, Wanmin; Xu, Fang; Yu, Zechuan; Wang, Ziyan; Ouyang, Gaoshang; Xu, Dianguo

doi:10.1016/j.jclepro.2023.136555

Cited by 34 publications

(5 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, many researchers are exploring effective utilization ways for PG to serve as an alternative cementitious material in concrete. PG was tried to prepare high-content PG concrete, and although its mechanical properties were reduced, the permeability resistance of concrete was qualified [14][15][16][17]. This approach not only reduces the reserves of PG, but also reduces the production and consumption of cement, promoting environmental sustainability and conserving natural resources.…”

Section: Introductionmentioning

confidence: 99%

Effect of Lightweight Aggregates Incorporation on the Mechanical Properties and Shrinkage Compensation of a Cement-Ground Granulated Blast Furnace Slag-Phosphogypsum Ternary System

Wang,

Ma,

Long

et al. 2024

FDMP

View full text Add to dashboard Cite

Shrinkage-induced cracking is a common issue in concrete structures, where the formation of cracks not only affects the aesthetic appearance of concrete but also potentially reduces its durability and strength. In this study, the effect of ceramsite sand addition on the properties of a ternary system of cement-ground granulated blast furnace slag (GGBFS)-phosphogypsum (PG) is investigated. In particular, the fluidity, rheology, hydration heat, compressive strength, autogenous shrinkage, and drying shrinkage of the considered mortar specimens are analyzed. The results indicate that an increase in PG content leads to a decrease in fluidity, higher viscosity, lower exothermic peak, and lower compressive strength. However, the shrinkage of the mortar specimens is effectively compensated. The incorporation of internal curing water from ceramsite sand improves fluidity, decreases both yield stress and viscosity, enhances the degree of hydration, and induces mortar expansion. However, the inferior mechanical properties of the ceramsite sand generally produce a decrease in the compressive strength.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Lightweight Aggregates Incorporation on the Mechanical Properties and Shrinkage Compensation of a Cement-Ground Granulated Blast Furnace Slag-Phosphogypsum Ternary System

Wang,

Ma,

Long

et al. 2024

FDMP

View full text Add to dashboard Cite

show abstract

“…The main component of phosphogypsum is calcium sulfate dihydrate. Calcium sulfate itself is an excellent cementing material and is rich in calcium and sulfur resources, which can be used as an artificial building material [ 5 , 6 , 7 , 8 , 9 , 10 ], a subgrade material [ 11 , 12 , 13 , 14 ], a backfill material [ 15 ], a ceramic material [ 16 ], and in the synthesis of new materials (such as nano-hydroxyapatite [ 17 , 18 , 19 , 20 ], nano-calcium carbonate [ 21 , 22 ], and calcium sulfate whisker [ 23 , 24 , 25 ]). It can also be used as a cement retarder [ 26 , 27 , 28 ], a water purification agent for adsorption of heavy metals [ 29 , 30 , 31 , 32 , 33 , 34 ], a soil conditioner [ 35 , 36 , 37 , 38 , 39 , 40 ], a slow-release nitrogen fertilizer [ 41 , 42 ], an agent in the coproduction of sulfuric acid for cement making [ 43 , 44 ], an asphalt improver [ 45 , 46 , 47 , 48 ], a plastic filler [ 49 , 50 , 51 ], an agent in carbon dio...…”

Section: Introductionmentioning

confidence: 99%

Review of the State of Impurity Occurrences and Impurity Removal Technology in Phosphogypsum

Liu

2023

Materials

View full text Add to dashboard Cite

A variety of co-existing impurities in phosphogypsum limit its large-scale and high-value utilization. This paper summarizes the common contents of major impurity components (silicon and phosphorus) and trace impurity components (fluorine, iron, aluminum, and carbon) in phosphogypsum and discusses the harm of impurity components to the comprehensive utilization of harmless phosphogypsum chemical resources. The occurrence status of impurity components in phosphogypsum and the research progress of various impurity removal technologies are summarized, and the effects of these impurity removal technologies on different contents of impurity components are evaluated. On this basis, the goal of improving the whiteness of phosphogypsum samples and the development of technology for further removal of impurities in phosphogypsum to improve the purity of the main content of calcium sulfate are speculated.

show abstract

“…Moreover, the storage of the PG could cause the leakage of contaminants such as sulfates, phosphate ions, trace metals, and radioactive nuclides [5], posing a threat to groundwater. At present, the PG dominates in soil improvement [6][7][8][9][10], construction materials [1,[11][12][13], and as a retarder in cement production [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Study on Synergistic Effect of Xanthan Gum and Sodium Methylsiliconate on Mechanical Strength and Water Stability of Phosphogypsum Road-Based Materials

Wu,

Xu,

Chu

et al. 2023

Materials

View full text Add to dashboard Cite

To address the issues of low strength, poor water stability, and hazardous substance leaching associated with using phosphogypsum (PG) as a direct road-based material, the traditional approach involves employing inorganic cementing materials to stabilize PG, effectively addressing the problems. This study innovatively utilizes the xanthan gum (XG) and sodium methylsiliconate (SM) as curing agents for PG to solve the above problems. An organic curing agent stabilized PG was prepared by dry mixing XG and PG. The unconfined compressive strength, water stability, and leaching behavior of stabilized PG were investigated, the leaching behavior was characterized by ion leaching concentration, and the mechanisms behind the strength development of stabilized PG were explored by SEM and FTIR. The experimental results indicate that the single incorporation of XG reduced the strength and water stability of stabilized PG, while the single incorporation of SM had a limited effect on strength and water stability. In addition, the dual incorporation of XG and SM significantly improved the strength and water stability of stabilized PG. At the same time, the dual incorporation of XG and SM greatly reduced the leaching of hazardous substances from stabilized PG. These results demonstrate the feasibility of using stabilized PG for road base materials.

show abstract

A new eco-friendly concrete made of high content phosphogypsum based aggregates and binder: Mechanical properties and environmental benefits

Cited by 34 publications

References 38 publications

Effect of Lightweight Aggregates Incorporation on the Mechanical Properties and Shrinkage Compensation of a Cement-Ground Granulated Blast Furnace Slag-Phosphogypsum Ternary System

Effect of Lightweight Aggregates Incorporation on the Mechanical Properties and Shrinkage Compensation of a Cement-Ground Granulated Blast Furnace Slag-Phosphogypsum Ternary System

Review of the State of Impurity Occurrences and Impurity Removal Technology in Phosphogypsum

Study on Synergistic Effect of Xanthan Gum and Sodium Methylsiliconate on Mechanical Strength and Water Stability of Phosphogypsum Road-Based Materials

Contact Info

Product

Resources

About