Fig 1.
MICP mechanism diagram.
Table 1.
Physical and mechanical properties of sand.
Fig 2.
Size distribution diagram of sand particles.
Table 2.
The physical and mechanical properties of palm fiber.
Fig 3.
Palm fiber.
Fig 4.
Sporosarcina pasteurii.
Fig 5.
Calibration curve of the correlation between OD600 and CFU.
Fig 6.
Schematic diagram of sample preparation for unconfined compressive strength test.
Fig 7.
Schematic diagram of sample preparation for shear test.
Fig 8.
Penetration device diagram.
Fig 9.
High precision NMR microanalyzer.
Fig 10.
Schematic flowchart.
Fig 11.
Stress-strain curves of 6 samples with different cementation solution concentrations.
Table 3.
Standard deviation (SD) of unconfined compressive strength corresponding to each concentration of cementation solution.
Fig 12.
Three-dimensional stress-strain diagram of 6 samples with different cementation solution concentrations.
Fig 13.
Shear displacement-shear stress curves of 6 different cementation solution concentrations .
Fig 14.
Shear displacement-shear stress curves of 6 different cementation solution concentrations .
Fig 15.
Shear displacement-shear stress curves of 6 different cementation solution concentrations .
Table 4.
The standard deviation (SD) of shear stress corresponding to each concentration of cementation solution.
Fig 16.
Three-dimensional graphs of shear displacement-shear stress of 6 different cementation solution concentrations .
Fig 17.
Three-dimensional graphs of shear displacement-shear stress of 6 different cementation solution concentrations .
Fig 18.
Three-dimensional graphs of shear displacement-shear stress of 6 different cementation solution concentrations .
Table 5.
Urease activity in high-concentration cementation solution.
Table 6.
Permeability coefficients of 6 different cementation solution concentrations.
Table 7.
Standard deviation of Permeability coefficients in 6 different cementation solution concentrations.
Fig 19.
Porosity at different positions of 6 samples with different cementation solution concentrations.
Fig 20.
Porosity curves of 6 different cementation solution concentrations at different locations.
Table 8.
Calcium carbonate content and Standard deviation in 6 different cementation solution concentrations.
Fig 21.
SEM images of cementation solution concentrations of (a) 0.2 mol/L, (b)0.3 mol/L, (c) 0.4 mol/L, (d) 0.5 mol/L, (e) 0.6 mol/L and (f) 0.7 mol/L respectively.
Fig 22.
The XRD results of cementation solution concentrations of 0.2 mol/L-0.7 mol/L were obtained.
Table 9.
Normalized intensity.