Strategy for developing a future support system for the Vasawarship and evaluating its mechanical properties

Heritage Science

Table 1 Density of Vasa oak[23]

Source	Position	Density	Average	Standard deviation	No. of samples	Note
		[ρ]	[kg/m³]	[kg/m³]	[−]
Thunell [24]		ρ_basic	460	-	10	Measured in watersat. cond (u = 132%), no PEG
Bjurhager et al. [25]		ρ_dry	757	112	28	u = 0%, PEG content 11.7 (17.3)%
Ljungdahl [9]		ρ_cond	1005	-	-	u = 7%, PEG content unknown
Ljungdahl [9]		ρ_cond	848	-	-	u = 8%, PEG content unknown
Ljungdahl and Berglund [26]		ρ_cond	1030	29	7	u = 9.7 (0.9)%, PEG content 30.5 (3.0)%
Ljungdahl and Berglund [26]		ρ_cond	1052	33	7	u = 9.4 (0.3)%, PEG content 25.7 (2.6)%
Bjurhager et al. [25]		ρ_cond	784	132	28	u = 7.8 (0.5)%, PEG content 11.7 (17.3)%
Ljungdahl and Berglund [26]	(centre)	ρ_cond	752	136	10	u = 12.5 (1.3)%, PEG content 2.8 (3.4)%
Burman et al. [27]	(centre)	ρ_cond	748	141	5	u = 8.9 (1.8)%, PEG content unknown
Ljungdahl and Berglund [26]	(surface)	ρ_cond	854	146	10	u = 11.8 (0.6)%, PEG content 11.1 (12.1)%
Burman et al. [27]	(surface)	ρ_cond	749	117	5	u = 8.8 (1.9)%, PEG content unknown
Bjurhager et al. [25]		ρ_{extracted,dry}	699	50	28	u = 0%, after PEG extraction
Bjurhager et al. [8]		ρ_{extracted,cond}	592	105	1	from SilviScan
Bjurhager et al. [8]		ρ_{extracted,cond}	701	170	1	from SilviScan
Bjurhager et al. [8]		ρ_{extracted,cond}	806	628	1	from SilviScan

u – moisture content; (…) – standard deviation; ρ_dry – ovendry density; ; ρ_cond – density in conditioned state (23°C, RH 53%); ρ_{extracted,dry} – density in extracted and ovendried state; ρ_{extracted,cond} – density in extracted and conditioned state;Silviscan indicates density measured by Silviscan technique.