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Impact of sulfate attack on mechanical properties and hydraulic conductivity of a cement-admixed clay

Ramiro Verastegui Flores (UGent) and Gemmina Di Emidio (UGent)
(2014) APPLIED CLAY SCIENCE. 101. p.490-496
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Abstract
Methodology: The mechanical and hydraulic behaviors of a cement-treated clay in contact with water and an ag- gressive sodium sulfate solution were investigated. Bender elements were installed in a flexible-wall hydraulic conductivity cell to simultaneously monitor the small-strain shear modulus (G0) and the hydraulic conductivity (k) of the cement-admixed clay. Results: During permeation with clean water, an increase of G0 and a gradual decrease of k with time were ob- served due to cement hydration. Conversely, after permeation with the sulfate solution, a sudden decrease of G0 and a gradual increase of k were recorded. Conclusions: G0 measurements provided evidence of immediate deterioration of the sample as it comes in contact with sulfates. However, in order to have significant impact on the permeability, a network of interconnected pref- erential flow paths had to first develop through the whole sample. Monitoring of G0 was shown to provide valu- able additional information to study the impact of chemical degradation of cement-treated clays.
Keywords
SOILS, STIFFNESS, ETTRINGITE FORMATION, BENDER ELEMENT TESTS, BEHAVIOR, STRENGTH, LIME, Clay, Cement, Sulfate attack, Hydraulic conductivity, Stiffness

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MLA
Verastegui Flores, Ramiro, and Gemmina Di Emidio. “Impact of Sulfate Attack on Mechanical Properties and Hydraulic Conductivity of a Cement-Admixed Clay.” APPLIED CLAY SCIENCE, edited by Faiza Bergaya, vol. 101, Elsevier, 2014, pp. 490–96, doi:10.1016/j.clay.2014.09.012.
APA
Verastegui Flores, R., & Di Emidio, G. (2014). Impact of sulfate attack on mechanical properties and hydraulic conductivity of a cement-admixed clay. APPLIED CLAY SCIENCE, 101, 490–496. https://doi.org/10.1016/j.clay.2014.09.012
Chicago author-date
Verastegui Flores, Ramiro, and Gemmina Di Emidio. 2014. “Impact of Sulfate Attack on Mechanical Properties and Hydraulic Conductivity of a Cement-Admixed Clay.” Edited by Faiza Bergaya. APPLIED CLAY SCIENCE 101: 490–96. https://doi.org/10.1016/j.clay.2014.09.012.
Chicago author-date (all authors)
Verastegui Flores, Ramiro, and Gemmina Di Emidio. 2014. “Impact of Sulfate Attack on Mechanical Properties and Hydraulic Conductivity of a Cement-Admixed Clay.” Ed by. Faiza Bergaya. APPLIED CLAY SCIENCE 101: 490–496. doi:10.1016/j.clay.2014.09.012.
Vancouver
1.
Verastegui Flores R, Di Emidio G. Impact of sulfate attack on mechanical properties and hydraulic conductivity of a cement-admixed clay. Bergaya F, editor. APPLIED CLAY SCIENCE. 2014;101:490–6.
IEEE
[1]
R. Verastegui Flores and G. Di Emidio, “Impact of sulfate attack on mechanical properties and hydraulic conductivity of a cement-admixed clay,” APPLIED CLAY SCIENCE, vol. 101, pp. 490–496, 2014.
@article{5870785,
  abstract     = {{Methodology: The mechanical and hydraulic behaviors of a cement-treated clay in contact with water and an ag- gressive sodium sulfate solution were investigated. Bender elements were installed in a flexible-wall hydraulic conductivity cell to simultaneously monitor the small-strain shear modulus (G0) and the hydraulic conductivity (k) of the cement-admixed clay.
Results: During permeation with clean water, an increase of G0 and a gradual decrease of k with time were ob- served due to cement hydration. Conversely, after permeation with the sulfate solution, a sudden decrease of G0 and a gradual increase of k were recorded.
Conclusions: G0 measurements provided evidence of immediate deterioration of the sample as it comes in contact with sulfates. However, in order to have significant impact on the permeability, a network of interconnected pref- erential flow paths had to first develop through the whole sample. Monitoring of G0 was shown to provide valu- able additional information to study the impact of chemical degradation of cement-treated clays.}},
  author       = {{Verastegui Flores, Ramiro and Di Emidio, Gemmina}},
  editor       = {{Bergaya, Faiza}},
  issn         = {{0169-1317}},
  journal      = {{APPLIED CLAY SCIENCE}},
  keywords     = {{SOILS,STIFFNESS,ETTRINGITE FORMATION,BENDER ELEMENT TESTS,BEHAVIOR,STRENGTH,LIME,Clay,Cement,Sulfate attack,Hydraulic conductivity,Stiffness}},
  language     = {{eng}},
  pages        = {{490--496}},
  publisher    = {{Elsevier}},
  title        = {{Impact of sulfate attack on mechanical properties and hydraulic conductivity of a cement-admixed clay}},
  url          = {{http://doi.org/10.1016/j.clay.2014.09.012}},
  volume       = {{101}},
  year         = {{2014}},
}
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