TY - JOUR
T1 - Variability in the Unconfined Compressive Strength of EICP-Treated "Standard" Sand
AU - Krishnan, Vinay
AU - Khodadadi Tirkolaei, Hamed
AU - Martin, Kimberly
AU - Hamdan, Nasser
AU - Van Paassen, Leon A.
AU - Kavazanjian, Edward
N1 - Funding Information:
The material in this research study is based on work primarily supported by the National Science Foundation (NSF) under NSF Cooperative Agreement No. EEC-1449501. The authors are grateful for the NSF support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the NSF. The authors also acknowledge the use of facilities within the Eyring Materials Center (EMC) at Arizona State University. The EMC is supported in part by NSF Cooperative Agreement No. ECCS-1542160.
Publisher Copyright:
© 2021 American Society of Civil Engineers.
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/4/1
Y1 - 2021/4/1
N2 - 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.
AB - 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.
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U2 - 10.1061/(ASCE)GT.1943-5606.0002480
DO - 10.1061/(ASCE)GT.1943-5606.0002480
M3 - Article
AN - SCOPUS:85099597095
VL - 147
JO - Journal of Geotechnical and Geoenvironmental Engineering - ASCE
JF - Journal of Geotechnical and Geoenvironmental Engineering - ASCE
SN - 1090-0241
IS - 4
M1 - 06021001
ER -