1. Sampling location
Closure test drift

2. Sampled core material Granite Shotcrete Cement Boundary
XRD and SEM analyses were performed on cement samples
Granite
Shotcrete
Cement

3. SEM photomicrographs of alteration phase/flesh cement
Granite
Shotcrete
Calcite
Intact part of shotcrete
Alteration part
Portlandite

4. XRD analysis of alteration and intact part in shotcrete
Intensity (cps) 60 40 80 20
2θ (deg)
0.0e+0
1.5e+5
1.0e+5
5.0e+4 Q C P V F
Q : Quartz
F : Feldspar Group
P : Portlandite
C : Calcite
V : Vaterite
Alteration part
Intact part