Variability in the Unconfined Compressive Strength of EICP-Treated "Standard" Sand

Vinay Krishnan, Hamed Khodadadi Tirkolaei, Kimberly Martin, Nasser Hamdan, Leon A. Van Paassen, Edward Kavazanjian

Research output: Contribution to journalArticlepeer-review

Abstract

Three different batches of "standard"Ottawa 20-30 sand were biocemented using enzyme-induced carbonate precipitation (EICP). The specimens from each batch were treated using the same biocementation procedure. The unconfined compressive strength (UCS) of the treated specimens varied from 0.22 to 1.6 MPa depending on the batch of sand used to prepare the specimens. These results show that sand of the same predominant mineral composition (e.g., >98% silica), of the same grain size distribution, and from the same geological formation but from different quarries within the formation do not necessarily respond in the same manner to biocementation. Hence, standard sands for mechanical geotechnical testing should not be considered a priori to be a standard sand for biogeotechnical testing.

Original languageEnglish (US)
Article number06021001
JournalJournal of Geotechnical and Geoenvironmental Engineering
Volume147
Issue number4
DOIs
StatePublished - Apr 1 2021

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)

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