Laboratory Study of Phosphogypsum, Stabilizers, and Tropical Soil Mixtures

Phosphogypsum (PG) is a by-product of the phosphoric acid fertilizer industries that has possible applications in paving when stabilized with cement or lime. This study’s aim is to compare the mechanical performance of the hemi-hydrate (HH) and dihydrate (DH) mixes with tropical soil, lime, and cement. The results of physical, mechanical, and mineralogical tests are presented, which demonstrate that the use of HH in cement and lime mixes reduces the swelling of this material compared to the use of DH; in addition, HH provides better mechanical behavior. These findings indicate that DH has limited application in pavement construction, but when converted into HH and mixed with tropical soil or chemical stabilizers, its alternative uses are possible, and more content (approximately 90%) of this material can be used.

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    • © 2016 American Society of Civil Engineers.
  • Authors:
    • de Rezende, Lilian Ribeiro
    • Curado, Tallyta da Silva
    • Silva, Millena Vasconcelos
    • Mascarenha, Márcia Maria dos Anjos
    • Metogo, Daniel Arthur Nnang
    • Neto, Manoel Porfirio Cordão
    • Bernucci, Liedi Legi Bariani
  • Publication Date: 2017-1


  • English

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  • Accession Number: 01608173
  • Record Type: Publication
  • Files: TRIS, ASCE
  • Created Date: Aug 10 2016 3:04PM