Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Effect of rubber on the physico-mechanical properties of the mortars studied
| Rubber content (%) | 0 | 10 | 20 | 30 |
|---|---|---|---|---|
| Fineness modulus (%) | 1.837±0,027 | 1.93±0,043 | 1.98±0,056 | 2.20±0,068 |
| Wet density (g/cm3) | 1.75±0.026 | 1.7±0.016 | 1.65±0.004 | 1.63±0.013 |
| Dry density (g/cm3) | 1.56±0.045 | 1.55±0.023 | 1.5±0.006 | 1.48±0.01 |
| Absorption (%) | 12.1±1.85 | 9.81±0.62 | 9.77±0.08 | 10.64±0.12 |
| Porosity (%) | 18.86±2.39 | 15.21±0.73 | 14.69±0.09 | 15.71±0.27 |
| Tensile strength (MPa) | 5,47±1.11 | 4.95±0.31 | 4,71±1.41 | 3,36±0.61 |
| Compressive strength (MPa) | 26,51±2.46 | 18,44±0.29 | 17,33±0.77 | 14,01±1.00 |
Chemical compositions of cement and dune sand
| CaO | SiO2 | Al2O3 | Fe2O3 | MgO | K2O | Na2O | SO3 | LoI* | |
|---|---|---|---|---|---|---|---|---|---|
| Cement | 58.6 | 24.92 | 6.58 | 3.65 | 1.21 | 0.85 | 0.08 | 2.17 | 1.7 |
| Dune Sand | 1.63 | 90.46 | 1.38 | 1.92 | 0.39 | 0.22 | 0.00 | 0.2 | 2.56 |
Composition of the mortars studied
| Rubber content (%) | 0 | 10 | 20 | 30 |
|---|---|---|---|---|
| Dune Sand (g) | 1350 | 1215 | 1080 | 945 |
| Cement (g) | 450 | 450 | 450 | 450 |
| Water (g) | 450 | 450 | 450 | 450 |
| Rubber Caoutchouc (g) | 0 | 60.14 | 120.28 | 180.42 |
| Water/Cement | 1 | 1 | 1 | 1 |
General material properties
| Unit | Dune Sand | Cement | RC | |
|---|---|---|---|---|
| Finess modulus | (%) | 1.837 | - | 3.92 |
| Sand equivalent (visual) | (%) | 99.56 | - | - |
| Sand equivalent (piston) | (%) | 85.97 | - | - |
| Apparent density | (g/cm3) | 1.46 | 1.09 | 0.40 |
| Absolute density | (g/cm3) | 2.11 | 3.11 | 0.94 |
| BSS | (cm2/g) | - | 3371 | - |