Durability against wood-destroying fungi of sweet chestnut and mixed sweet chestnut-poplar OSB

Figures & data

Figure 1. OSB is often used in some exterior applications such as hoarding (image Zanuttini).

Figure 2. Left: mattress made of poplar and sweet chestnut strands entering the continuous pressing phase. Right: specimens subjected to a durability test with Coniophora puteana according to the EN113-3 standard.

Table 1. Density, average mass loss (AML), standard deviation, statistical grouping (a, b, c, d) and durability Class (based on median mass loss values according to the EN 350 standard) for the different fungi used and for solid wood used for virulence control.

	Average mass loss (%) and durability classes
	Density (kg/m^3)	Coniophora puteana AML (%)	DC Class (EN 350)	Pleurotus ostreatus AML (%)	DC Class (EN 350)	Trametes Versicolor AML (%)	DC Class (EN 350)
OSB/3 100% P	524.3 (31.2)	40.9 (6.0) bc	5	9.8 (1.3) b	2	32.3 (2.3) a	5
OSB/3 80% P - 20% SC	574.1 (33.0)	10.0 (1.8) a	2	1.8 (1.0) a	1	6.2 (2.2) a	2
OSB/3 50% P - 50% SC	575.7 (37.9)	8.9 (2.2) a	2	1.7 (1.0) a	1	6.0 (1.8) a	2
OSB/3 100% SC	589.8 (34.6)	10.3 (1.9) a	2	2.2 (1.3) a	1	6.0 (2.2) c	2
Plywood 100% P	457.1 (11.7)	41.7 (9.2) bc	5	11.4 (1.7) c	3	33.9 (3.3) c	5
Pine sapwood	677.4 (30.4)	49.9 (8.0) c	5	-		-
Beech wood	618.4 (54.3)	37.3 (1.5) b	5	22.0 (8.2) d	4	26.3 (4.8) b	4

Standard deviations are indicated within parentheses.

Table 2. Median mass loss (MML), durability Class and durability class distribution (in accordance with the EN 350 standadr, 2016) for the different fungi used and for the different materials tested.

Material	Fungal strain	Number of specimens	MML (%)	Durability Class	Durability class distribution (%)
					DC1	DC2	DC3	DC4	DC5
OSB/3 100% P	Coniophora puteana	12	31.4	5				8.3	91.7
	Pleurotus ostreatus	12	9.8	2		50.0	50.0
	Trametes versicolor	12	33.1	5				25.0	75.0
OSB/3 80% P - 20% SC	Coniophora puteana	32	9.8	2		59.4	40.6
	Pleurotus ostreatus	32	1.5	1	100
	Trametes versicolor	32	6.0	2	28.1	59.4	12.5
OSB/3 50% P - 50% SC	Coniophora puteana	32	9.2	2	3.1	62.5	31.3	3.1
	Pleurotus ostreatus	32	1.5	1	100
	Trametes versicolor	32	5.8	2	28.1	71.9
OSB/3 100% SC	Coniophora puteana	32	9.9	2		53.1	48.9
	Pleurotus ostreatus	30	1.8	1	96.7	3.3
	Trametes versicolor	30	5.6	2	37.5	56.3	6.2
Plywood 100% P	Coniophora puteana	12	42.0	5				8.3	91.7
	Pleurotus ostreatus	12	11.2	3		25.0	66.7	8.3
	Trametes versicolor	12	33.2	5					100

Figure 3. Mass loss of OSB/3, plywood and solid wood exposed to C. puteana, grouped (a, b, c) based on statistical analysis.

Figure 4. Mass Loss of OSB/3, plywood and solid wood exposed to P. ostreatus, grouped (a, b, c, d) based on statistical analysis.

Figure 5. Mass Loss of OSB/3, plywood and solid wood exposed to T. versicolor, grouped (a, b, c) based on statistical analysis.

EN 350:2016, Durability of Wood and Wood-Based Products – Testing and Classification of the Durability to Biological Agents of Wood and Wood-Based Materials. Brussels, Belgium: European Committee for Standardization.

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Data availability statement

Data can be required to [email protected].