Bio-Composites & Recycled AggregatesBSh (Hot Semi-Arid)Csa (Mediterranean)
Bio-Composite Earth Block (Clay + 4% Stipa tenacissima / Alfa Fiber)
Brique de Terre Compressée à l'Alfa (Halfa)
Primary Geographic Coverage: Morocco Algeria Tunisia Libya
Compressive Strength
1.75 MPa
Wet yield: 0.95 MPa (Ratio: 54%)Thermal Conductivity (λ)
0.372 W/m·K
Diffusivity: 0.188 mm²/sThermal Phase Lag (30cm)
13 hrs
U-Value: 1.05 W/m²·KCarbon vs. Concrete
-90.5%
Embodied: 0.021 kgCO2e/kgSoil Mechanics & Physics
| Soil Classification: | Calcareous marl and clay mixed with endemic Stipa tenacissima grass fibers (length 20-30mm) |
| Liquid Limit (LL): | 35% |
| Plastic Limit (PL): | 19% |
| Plasticity Index (PI): | 16% |
| Optimum Moisture Content: | % |
| Proctor Dry Density: | 1720 kg/m³ |
Thermal Thermodynamics
| Conductivity (λ): | 0.372 W/m·K |
| Specific Heat Capacity (c): | 1150 J/kg·K |
| Thermal Diffusivity (α): | 0.188 mm²/s |
| Volumetric Heat Capacity: | 1978 kJ/m³·K |
| 30cm Wall U-Value: | 1.05 W/m²·K |
| Phase Delay (30cm Wall): | 13 Hours |
Tectonic Specifications & Architectural Engineering
Bioclimatic Engineering Strategy
Alfa fibers act as micro-bridges that arrest drying shrinkage microcracks while entrapping dead air pockets. Lowers thermal conductivity by 60.3% compared to baseline raw clay.
Mortar Formulation & Stabilization Mix
Lime-clay-sand mortar reinforced with chopped Alfa fibers
Curing, Quality Control & Erosion Protection
Academic References & Lab Data Sources
- Ajouguim, S.; Talibi, S.; Djelal-Dantec, C.; Hajjou, H. Effect of Alfa fibers on mechanical and thermal properties of compacted earth bricks. Mater. Today Proc. 2019, 37, 4049–4057.
- El Hamdouni, Y.; Khabbazi, A. Res. J. Appl. Sci. Eng. Technol. 2016, 12, 490–497.