https://orcid.org/0000-0002-3752-9448
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. Using lime neutralization to pretreat PG, the pH value, mortar consistency and setting time, activation index, and physical properties as well as the Fourier transform infrared spectroscopy and scanning electron microscopy examination with lime dosage are discussed. The results show that the performance of the obtained mixture powder activation index was better when it was weakly acidic; it is suggested that the optimal pH value range of lime neutralization for modified PG was about 4.52. The physical properties of PG are greatly affected by the lime content, and the influence mechanism was analyzed. It is anticipated that the results of the present study will be useful in utilizing the waste materials (fly ash, PG) for various geotechnical applications.
Issue Section:
Technical Papers
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