1 Introduction
2 Methods
2.1 Materials
Screen hole size range (mm) | WF (%) | VWP (%) | RWP (%) |
---|---|---|---|
<0.1 | 5.0 | – | – |
0.1–0.25 | 24.5 | – | – |
0.25–0.5 | 65.9 | – | – |
0.5–0.75 | 4.1 | 22.6 | 9.5 |
0.75–1.0 | 0.5 | 22.3 | 19.0 |
1.0–1.5 | – | 19.2 | 31.3 |
1.5–2.0 | – | 20.6 | 34.1 |
2.0–3.0 | – | 15.4 | 6.1 |
2.2 Wood particle geometry
2.3 Processing
WPC code | Type of wood particles | Wood content | PP content | MAPP content |
---|---|---|---|---|
RWP-20-3 | RWP | 20 | 77 | 3 |
RWP-40-3 | RWP | 40 | 57 | 3 |
RWP-60-3 | RWP | 60 | 37 | 3 |
RWP-40-0 | RWP | 40 | 60 | 0 |
VWP-40-0 | VWP | 40 | 60 | 0 |
WF-40-0 | WF | 40 | 60 | 0 |
2.4 Mechanical testing
2.5 Water absorption and thickness swelling
2.6 Statistical analysis
3 Results and discussion
3.1 WP geometry
Wood particles | Fraction | Length (mm) | Width (mm) | Thickness (mm) | Length-to-thickness | Width-to-thickness |
---|---|---|---|---|---|---|
VWP | 0.5 < F < 1.0 | 3.9 (1.4) | 0.6 (0.2) | 0.3 (0.1) | 16.3 (4.1) | 2.5 (0.9) |
1.0 < F < 2.0 | 12.2 (6.0) | 1.4 (0.6) | 0.6 (0.4) | 20.2 (6.1) | 2.6 (1.2) | |
2.0 < F < 3.0 | 16.2 (6.4) | 2.1 (0.9) | 0.9 (0.5) | 20.8 (6.2) | 2.7 (1.1) | |
RWP | 0.5 < F < 1.0 | 2.3 (0.9) | 0.7 (0.3) | 0.5 (0.2) | 5.3 (2.2) | 1.4 (0.2) |
1.0 < F < 2.0 | 2.9 (1.0) | 1.3 (0.5) | 0.9 (0.6) | 3.5 (1.5) | 1.4 (0.3) | |
2.0 < F < 3.0 | 5.1 (2.0) | 2.2 (0.8) | 1.5 (0.7) | 3.8 (1.7) | 1.5 (0.4) | |
WF | F < 0.75 | 0.7 (0.3) | 0.4 (0.1) | 0.3 (0.1) | 3.0 (1.1) | 1.3 (0.2) |
3.2 Effect of RWP content
Variable | Tensile modulus | Tensile strength | Flexural modulus | Flexural strength | Impact strength | Water absorption | Thickness swelling | ||
---|---|---|---|---|---|---|---|---|---|
24 h | 28 days | 24 h | 28 days | ||||||
RWP content | <0.0001* | <0.0020* | <0.0001* | 0.0113** | <0.0007* | <0.0001* | <0.0001* | <0.0001* | <0.0001* |