Effects of the addition of dihydrate phosphogypsum on the characterization and mechanical behavior of lateritic clay

8Citations
Citations of this article
10Readers
Mendeley users who have this article in their library.
Get full text

Abstract

This paper presents the effect of adding dihydrate phosphogypsum, which is a byproduct of the production of phosphate fertilizers, on the mechanical behaviour of a lateritic clay typical of Brazil’s Midwest region. Because of the distinction of the mechanical behaviours of both materials, laboratory experiments were conducted with soil, phosphogypsum and mixtures with 10%, 20% and 50% phosphogypsum content. One-dimensional consolidation, direct shear and scanning electron microscopy (SEM) tests were conducted on optimally compacted specimens to show the effect of the loading time on the mechanical parameters of the materials. Water percolated through the materials was chemically analysed to verify the groundwater level contamination potential due to cation lixiviation in phosphogypsum. The results show that the addition of phosphogypsum to the soil increases the compressibility without significant effect on the strength parameters, and the broken phosphogypsum particles make the mixture deformability depend on the loading time. With this study, one can conclude that the dihydrate phosphogypsum content in geotechnical works must be maintained below 20%, since higher ratios negatively affect the soil mechanical behaviour and ground water contamination potential. This study also presents an option to reuse and dispose of the most commonly produced phosphogypsum type in Brazil.

References Powered by Scopus

Environmental impacts of phosphogypsum

444Citations
N/AReaders
Get full text

Application of phosphogypsum in soil stabilization

300Citations
N/AReaders
Get full text

Preparation of load-bearing building materials from autoclaved phosphogypsum

255Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Evaluation of engineering properties and environmental effect of recycled gypsum stabilized soil in geotechnical engineering: A comprehensive review

71Citations
N/AReaders
Get full text

Phosphogypsum, tropical soil and cement mixtures for asphalt pavements under wet and dry environmental conditions

52Citations
N/AReaders
Get full text

Geogrid Mechanical Damage Caused by Recycled Construction and Demolition Waste (RCDW): Influence of Grain Size Distribution

7Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Mascarenha, M. M. D. A., Cordão Neto, M. P., de Matos, T. H. C., Das Chagas, J. V. R., & de Rezende, L. R. (2018). Effects of the addition of dihydrate phosphogypsum on the characterization and mechanical behavior of lateritic clay. Soils and Rocks, 41(2), 157–170. https://doi.org/10.28927/SR.412157

Readers over time

‘20‘22‘2402468

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 2

67%

Professor / Associate Prof. 1

33%

Readers' Discipline

Tooltip

Engineering 4

100%

Save time finding and organizing research with Mendeley

Sign up for free
0