CUED Publications database

Microbial carbonate precipitation: Correlation of S-wave velocity with calcite precipitation

Qabany, AA and Mortensen, B and Martinez, B and Soga, K and Dejong, J (2011) Microbial carbonate precipitation: Correlation of S-wave velocity with calcite precipitation. In: UNSPECIFIED pp. 3993-4001..

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Abstract

The use of microbial induced precipitation as a soil improvement technique has been growing in geotechnical domains where ureolytic bacteria that raise the pH of the system and induce calcium carbonate (CaCO3) precipitation are used. For many applications, it is useful to assess the degree of CaCO 3 precipitation by non-destructive testing. This study investigates the feasibility of S-wave velocity measurements to evaluate the amount of calcite precipitation by laboratory testing. Two sets of cemented specimen were tested. The first were samples terminated at different stages of cementation. The second were samples that went through different chemical treatments. These variations were made to find out if these factors would affect the S-wave velocity- cementation relationship. If chemical reaction efficiency was assumed to be constant throughout each test, the relationship between S-wave velocity (Vs) and the amount of CaCO3 precipitation was found to be approximately linear. This correlation between S-wave velocity and calcium carbonate precipitation validates its use as an indicator of the amount of calcite precipitation © 2011 ASCE.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: Biological processes Microbes Minerals Precipitation Wave velocity
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:14
Last Modified: 27 Nov 2014 19:19
DOI: 10.1061/41165(397)408