WOOD RESEARCH Volume 70, Number 4, 2025
MIKKEL NÜSSLER, JOHN BANG MATHIASEN, and JACOB KJÆR ESKILDSEN

DECAY RESISTANCE AND FIRE CLASSIFICATION OF SURFACE-CARBONIZED SCOTS PINE WITH POST-CARBONIZATION LINSEED OIL AND SODIUM SILICATE TREATMENT

Todetermine the effect on decay resistance and fire classificationof applying linseed oil or a sodium silicate solution to surfacecarbonized Scots pine,two different experiments were conducted. AnAWPA E10 standard (AWPA 20216) soil block test was conducted to determine the decay resistance of eight unique treatment configurations, and fireclassification following the EN 13823:2010+A1:2014 / EN 14915:2013was conducted to determine the fire classification of façade panels treated with pure linseed oil and a 40/60 mix of linseed oil and sodium silicate respectively. The study showed that decay resistancemeasured as average mass loss (AML%) improves significantly by surface carbonization butdepends on the intensity of the treatment as well as the application of surface sealing substances applied post-carbonization. Carbonized Scots pine façade panels without any post-carbonization treatment as well as carbonized Scots pine treated with sodium silicate or a 40/60 mix of linseed oil and sodium silicate solution obtained an EN 13823:2010+A1:2014/ EN 14915:2013 B-s1,d0 fire classification. Carbonized Scots pine treated with pure linseed oil did not obtain any classification under EN 13823:2010+A1:2014/ EN 14915:2013.

WOOD RESEARCH Volume 61, Number 3, 2016
Mehmet Yeniocak, Mehmet Colak, Osman Goktas, and Ibrahim Koca

Fire resistance performance of wood materials colored with eco-friendly pomegranate skin (Punica granatum) extracts

The main goal of this study was to determine fire resistance properties of wood treated with pomegranate extract and mordant mixes. According to that wood materials Scotch pine (Pinus sylvestris L.), Oriental beech (Fagus orientalis Lipsky) were chosen. Aluminum sulphate (KAl2(SO4)3.18H2O) copper sulphate (CuSO2.5H2O) and vinegar were used as mordant agent and a synthetic dye was used for comparison. Ultrasonic assisted method were used for extractionthe plant dyestuff from pomegranate skin (Punica granatum) and then applied to wood blocks by immersion (classic) and immersion ultrasonic assisted methods. The combustion test was realized according to ASTM-E 69-02 (2002) standard. The mass losses release of gasses (CO, O2) and the temperature differences of samples were detected for each 30 seconds during combustion. The results showed that the aluminum sulphate mixes were showed the best results on all tests. Unfortunately test performances are not enough to retard the fire effect on the wood materials. Eco-friendly natural colorant might be developed to use them as fire retardant.

WOOD RESEARCH Volume 63, Number 4, 2018
Ľudmila Tereňová, Katarína Dúbravská, and Andrea Majlingová

Influence of the cross-sectional shape of the log elements to seal the log walls under the thermal loading

The aim of the research was to perform the medium-scale fire tests of two alternate samples of the log wall, using the radiant heat source. The radiant heat source consisted of a ceramic radiation panel with a maximum power of 50.5 kW.m-2 and a maximum temperature of 935°C. The samples varied by their geometric shape and the different design of the groove, which was sealed with glass mineral wool. A better result was achieved by a round wood sample with the circular section, which also resisted to high temperatures in the place of the groove and did not start burning with flame. The sample of the squared log elements started to burn with a flame. Temperature measured in the groove was much higher than in the first case.