Figure 1.
Digital microscope image of the tested basalt dust (1000x magnification)
Figure 2.
The grain-size distribution curves determined for the tested non-cohesive soil and basalt dust
Table 1.
Basic properties of the tested materials
| Property | Value | |
|---|---|---|
| NCS | BD | |
| Particle size distribution | ||
| Gravel (%) | 0.2 | – |
| Sand (%) | 99.7 | 9.9 |
| Silt (%) | 0.1 | 75.2 |
| Clay (%) | – | 14.9 |
| Coefficient of uniformity (Cu) | 2.43 | > 25.0 |
| Coefficient of curvature (Cc) | 0.84 | > 2.56 |
| Specific dry density (t/m3) | 2.65 | 2.76 |
Figure 3.
Compaction curves of tested non-cohesive soil and soil-dust mixtures
Table 2.
Tested and corrected coefficients of permeability
| Material | k (m/s) | k10 (m/s) |
|---|---|---|
| NCS | 1.72·10−4 | 1.20·10−4 |
| NCS+5%BD | 8.00·10−5 | 5.57·10−5 |
| NCS+10%BD | 6.76·10−5 | 4.71·10−5 |
| NCS+15%BD | 4.60·10−5 | 3.20·10−5 |
Figure 4.
The e–σv’ relationships obtained from one-dimensional compressibility tests
Figure 5.
The constrained modulus for primary compression M of the tested materials in relation to the effective stress σv’
Figure 6.
The τ–s relationships obtained from direct shear tests for the considered materials: (a) NCS; (b) NCS+5%BD; (c) NCS+10%BD; (d) NCS+15%BD