Table 3
Ratio of the number of rollers passes to the area determined by Kevern et al. (2009).
| NUMBER OF ROLLER PASSES | ROLLER CONTACT AREA WITH THE SAMPLE |
|---|---|
| 1 | |
| 2 | |
| 3 |
Table 6
Axle dimensions depending on load.
| DIMENSION | CHARGES | ||
|---|---|---|---|
| 22 kN | 40 kN | 80 kN | |
| Large tyre contact area. L (mm) | 670 | 150 | 200 |
| Wide tyre contact area. W (mm) | 284 | 100 | 150 |
| Shaft length. A (mm) | 1630 | 1700 | 1500 |
| Distance between wheels. B (mm) | – | – | 300 |
Figure 1
Full slab load positions.
Figure 2
Short slab load positions.
Table 7
Properties Permeable concrete.
| PROPERTIES | VALUE |
|---|---|
| Compressive strength (MPa) | 16.5 |
| Tensile bending strength (MPa) | 2.85 |
| Modulus of elasticity (MPa) | 16133 |
| Poisson’s ratio | 0.22 |
| Coefficient of thermal expansion (1/°C) | 1.1 × 10–5 |
| Density (Kg/m3) | 2177 |
Table 8
Dosages used.
| PC-39-15 | PC-35-20 | |
|---|---|---|
| Coarse aggregate [Kg/m3] | 1345,16 | 1325,08 |
| Fine Aggregate [Kg/m3] | 201,74 | 265,00 |
| Cement [Kg/m3] | 345,31 | 341,77 |
| Water [Kg/m3] | 134,67 | 119,62 |
| A/C | 0,39 | 0,35 |
| % AF/AG | 15,00 | 20,00 |
Table 9
Pressures according to Kevern’s areas (2009).
| PASS | PERIMETER CONTACT (m) | AREA (m2) | Prodillo (N) | PRESSURE (MPa) |
|---|---|---|---|---|
| 1° | 0,05890 | 0,0176715 | 588,6 | 0,0333 |
| 2° | 0,02945 | 0,0088357 | 588,6 | 0,0666 |
| 3° | 0,01473 | 0,0044179 | 588,6 | 0,1332 |
Table 10
Compaction with the area measured in the laboratory.
| PASS | PERIMETER CONTACT (m) | AREA (m2) | Prodillo (N) | PRESSURE (MPa) |
|---|---|---|---|---|
| 1º | 0,05000 | 0,0150000 | 588,6 | 0,0392 |
| 2º | 0,04500 | 0,0135000 | 588,6 | 0,0436 |
| 3º | 0,03000 | 0,0090000 | 588,6 | 0,0654 |
Figure 3
a) The used concrete mixer b) Tile mould with risers.
Figure 4
a) Mould with riser b) Manual roller compaction method.
Figure 5
Permeable concrete slabs.
Figure 6
a) Division of slabs with foil b) Joists obtained from slabs.
Figure 7
Variation of maximum stresses depending on slab thickness.
Figure 8
Variation of maximum stress depending on the thickness variation in short slabs.
Figure 9
Flexural strength 7 days.
Figure 10
Flexural and tensile strength of 7 and 28-day-old tiles.
Table 11
Results of flexural strength depending on compaction method.
| COMPACTACTION | SAMPLES | 7 DAYS | 28 DAYS | INCREASE |
|---|---|---|---|---|
| Roller | PC-39-15-R | 2,36 MPa | 2,77 MPa | 17% |
| PC-35-20-R | 1,46 MPa | 2,06 MPa | 41% | |
| Tamping rod | PC-39-15-P | 2,57 MPa | 2,81 MPa | 9% |
| PC-35-20-P | 1,91 MPa | 2,38 MPa | 25% |
Figure 11
Permeability obtained with ASTM C1701.
Figure 12
Permeability obtained with a cylindrical specimen and tile core.