Birch sawdust + Bran + Birch bark · T. versicolor (D2)
✓ Reviewed content
Trametes versicolor (FPRL 40C) · Latvian State Institute of Wood Chemistry, Riga (LV)
Recipe
How this sample was made, step by step · total growth 21 days-
1
Substrate
- 64.81 wt%
- Birch sawdust (mostly ≤ 3 mm)
- 27.78 wt%
- Birch bark (AS “Latvijas Finieris” (plywood manufacturer), Riga (LV))
- 7.41 wt%
- Wheat bran
-
2
Sterilisation
Not reported
-
3
Inoculation
- Fungus
- Trametes versicolor · FPRL 40C
- Inoculum
- Liquid culture
-
4
Pre-growth
14 days- Where
- bag / container
-
5
Growth in mould
7 days- Mould
- moulds 200 × 200 × 40 mm; pre-growth in 4 L filter bags
- Temperature
- 20 °C
- Humidity
- 70 % RH
- Light
- dark
-
6
Inactivation
- Method
- Oven drying
- Temperature
- 70 °C
- Duration
- 24 h
-
7
Specimen & testing
- Geometry
- boards 200 × 200 × 40 mm; bending 170 × 30 × 30 mm, λ 200 × 200 × 30 mm, cone 100 × 100 × 30 mm
- Dry density
- 220 kg/m³
- Mass loss
- 50 %
- Measurements
- 9
Steps marked “not reported” were not stated in the source. Suggest missing details
Variant D2 of the birch sawdust substrate group: Birch sawdust + Bran + Birch bark.
Measurements
Mechanical
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Flexural strength | 0.17 ± 0.01 MPa | 5 | EN 12089:2011 (3-point) | 23 ± 2 °C / 50 ± 5 % RH span 150 mm, 10 mm/min, preload 1 N |
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| Flexural modulus | 8.78 ± 1.31 MPa | 5 | EN 12089:2011 (3-point) | 23 ± 2 °C / 50 ± 5 % RH span 150 mm, 10 mm/min, preload 1 N |
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Physical properties
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Density | 220 kg/m³ | 5 | – | g/cm³ in the paper; standard deviation given as 0 in the paper (rounded) |
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Fire behaviour
| Property | Value | n | Test standard | Conditions | |
|---|---|---|---|---|---|
| Time to ignition (TTI) | 15 ± 1 s | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² | edit |
| Peak heat release rate (pHRR) | 181.1 ± 13.4 kW/m² | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² | edit |
| Total heat release (THR) | 62.1 ± 3.5 MJ/m² | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² unit given in the paper as “k·W·m⁻²”; MJ/m² is usual for THR – please check against the original |
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| Total smoke release (TSR) | 281.5 ± 26.2 m²/m² | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² | edit |
| Time to flameout (TTF) | 1181 ± 74 s | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² | edit |
| Time to peak heat release rate (TTP) | 30 ± 2 s | 4 | ISO 5660-1:2015 | heat flux 35 kW/m² | edit |
Production
Substrate mix
Fungus & inoculation
- Fungus
- Trametes versicolor (FPRL 40C)
- Inoculum type
- Liquid culture
Growth
- Pre-growth (bag) [days]
- 14
- Growth in mould [days]
- 7
- Temperature [°C]
- 20
- Relative humidity [%]
- 70
- Light
- dark
- Mould / mould material
- moulds 200 × 200 × 40 mm; pre-growth in 4 L filter bags
Post-processing
- Inactivation
- Oven drying
- Inactivation – temperature [°C]
- 70
- Inactivation – duration [h]
- 24
Specimen
- Specimen geometry
- boards 200 × 200 × 40 mm; bending 170 × 30 × 30 mm, λ 200 × 200 × 30 mm, cone 100 × 100 × 30 mm
- Dry density [kg/m³]
- 220
- Mass loss on drying [%]
- 50
Notes
Inoculum: mycelial pellets from liquid culture (glucose/peptone/yeast extract, pH 6, 14 days, 27 °C, 150 rpm), homogenised and mixed with the sterile substrates; 75 % distilled water added (basis not specified). Incubation at 20 ± 2 °C, 70 ± 5 % RH, dark. Mass loss = final moisture content of the group (given per substrate group only). Recipe in grams see Table 1 of the paper; shares here calculated from it. λ of the sawdust group according to the text approx. 50 mW/(m·K) (Fig. 6).
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