Methods for calcium carbonate content measurement of biocemented soils

Sun Gyu Choi, Sung Sik Park, Shifan Wu, Jian Chu

Research output: Contribution to journalComment/debate

156 Scopus citations

Abstract

Recently, a new soil improvement method to use a microbially induced calcium carbonate precipitation (MICP) process to generate biocementation in sand has been developed. In this method, the properties of biocemented soil are controlled by the calcium carbonate content produced through the MICP process. Various methods have been used in the literature to determine the calcium carbonate content in soil. However, the calcium carbonate content determination can be affected by the methods used and this effect has not been studied so far. In this paper, six different methods that can be adopted to measure the calcium carbonate content are examined experimentally: the titration, inductively coupled plasma (ICP), X-ray diffraction (XRD) TOPAS, thermogravimetric analysis (TGA), ASTM, and washing methods. The titration and ICP methods give the lowest value and the washing method the highest value. The other three methods, XRD TOPAS, TGA, and ASTM, produce values in between and the differences among the values measured by those three methods are small.

Original languageEnglish
Article number06017015
JournalJournal of Materials in Civil Engineering
Volume29
Issue number11
DOIs
StatePublished - 1 Nov 2017

Keywords

  • Biocementation
  • Calcium carbonate content
  • Sand
  • Soil improvement

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