Table 1.
Characteristics of Ottawa sand.
Fig 1.
Schematic plan of MICP experiments in aqueous solution.
Fig 2.
Sand column experiment setup.
Fig 3.
Ureolytic activity vs. time at different temperatures.
Table 2.
Total hydrolysis capacity under different temperature.
Fig 4.
Amount of CaCO3 precipitation vs. time.
Fig 5.
Rate of CaCO3 precipitation vs. time.
Fig 6.
Ratio of hydrolysis capacity and precipitated CaCO3 at different temperatures to 30 °C.
Fig 7.
XRD diffraction pattern of the calcium carbonate precipitates produced at different temperatures.
Fig 8.
SEM images of CaCO3 powder produced at (A1-A3: 10 °C,20 °C and 30 °C) and sand samples treated at (B1-B3: 10 °C,20 °C and 30 °C).
Table 3.
Unconfined compression strength at different temperatures over different treatment time(grouting times) (kPa).
Fig 9.
Unconfined compression strength of MICP-treated sand column.
Fig 10.
CaCO3 content after different treatment times at different temperatures.