A phosphogypsum‐based road material with enhanced mechanical properties for sustainable environmental remediation

Zmemla, Raja; Benjdidia, Mounir; Naifar, Ikram; Sadik, Chaouki; Elleuch, Boubaker; Sdiri, Ali

doi:10.1002/ep.13732

Cited by 17 publications

(5 citation statements)

References 33 publications

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“…A mixture of 46.5% sand, 46.5% PG, and 7% cement was prepared, and its mechanical strength and leaching behavior were discussed [121]. The obtained results indicated that the early and final compressive strengths of the stabilized material were higher than those of conventional road subgrade materials, reaching 2200 and 3500 kPa at 28 and 360 days, respectively.…”

Section: Road Bases and Pavement Materialsmentioning

confidence: 99%

The Impurity Removal and Comprehensive Utilization of Phosphogypsum: A Review

Guan,

Wang,

Zhou

et al. 2024

Materials

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Phosphogypsum (PG), a byproduct during the phosphoric acid production process, also known as the wet process, contains complex and diverse impurities, resulting in low utilization and considerable accumulation. This leads to a massive waste of land resources and a series of environmental pollution problems. Given the current urgent ecological and environmental situation, developing impurity removal processes with low energy consumption and high efficiency, exploring valuable resource recovery, preparing high value-added PG products, and broadening the comprehensive utilization ways of PG are significant strategies to promote the sustainable consumption of PG and sustainable development of the phosphorus chemical industry. This review comprehensively summarizes the advantages and disadvantages of existing PG impurity removal and utilization technologies and probes into the future development direction, which provides references and ideas for subsequent PG research.

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Section: Road Bases and Pavement Materialsmentioning

confidence: 99%

The Impurity Removal and Comprehensive Utilization of Phosphogypsum: A Review

Guan,

Wang,

Zhou

et al. 2024

Materials

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“…Phosphogypsum is an industrial solid waste generated during the production of wet process phosphoric acid, the main component is CaSO4• 2H2O, in addition to a variety of other impurities, such as phosphorus, fluorine, eutectic phosphorus, phosphate and organic matter [26] , resulting in large fluctuations in the quality of phosphogypsum, which is very unfavorable to its resource utilization. At present, the development and application of phosphogypsum building materials in Yunnan, Guizhou, Hubei and Chongqing provinces and cities in China have taken shape, with the main products being modified moisture-proof lightweight gypsum wallboard, gypsum putty powder, gypsum mold box for hollow building cover structure and gypsum roadbed bedding, etc [27] . Huancheng Song [28] prepared sintered bricks from phosphogypsum in Hubei, Guizhou, and Yunnan, and the results showed that phosphogypsum has certain self-sintering properties, and the sintering properties of phosphogypsum were substantially improved by adding 2% of sintering additives, and the compressive strength was up to 39.97±3.03 MPa, which was in accordance with the national standard for load-bearing wall bricks.…”

Section: Research Status Of Phosphogypsum-based Wall Materialsmentioning

confidence: 99%

Research Status and Development Trend of Sintered Solid Waste-based Wall Insulation Materials

Zhao

Yao

Nan

et al. 2023

J. Phys.: Conf. Ser.

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Improving the thermal performance of the building envelope and reducing the energy consumption of heat transfer are particularly important for building energy conservation. Wall insulation materials can be divided into sintered and non-sintered two types. Sintered wall insulation materials have unique advantages in the development of self-insulating wall because of their high strength, good insulation ability and wide range of raw materials. In this paper, the research status of shale, fly ash, coal gangue and phosphogypsum as raw materials to develop wall insulation materials are introduced, feasible research direction in view of the significantly reduced thermal performance and durability of sintered self-insulating wall materials in high humidity environment and high sintering temperature are put forward. The research on the formation and control mechanism of high closed porosity structure and the action mechanism of multiple fluxes can provide theoretical support for the design and optimization of self-insulation wall materials with light, high strength, low sintering temperature and meeting the requirements of building energy conservation.

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“…Stabilised and cured PG can be used to replace traditional road materials, thus reducing rock and soil mining and protecting the environment while increasing PG utilisation for sustainable development. A mixture of 46.5% sand, 46.5% PG, and 7% cement was prepared, and its mechanical strength was discussed ( Zmemla et al., 2022 ). The prepared mixture was subjected to conventional compressive and tensile strength tests as well as Young’s modulus test, the results of which indicated that the early and final compressive strengths of the stabilised material were higher than those of conventional road subgrade materials, reaching 2200 and 3500 kPa at 28 and 360 days, respectively.…”

Section: Application Of Pg In Road Engineeringmentioning

confidence: 99%