Small Scale Test Results and Analysis Maximum values and corresponding times for nontreated and treated pine timber specimens of combustion parameters such as HRR (heat release rate), EHC (effective heat combustion), MLR (mass loss rate), SEA (specific extinction area), COy (carbon monoxide yield) and CO2y (carbon dioxide yield) are given in Table 1 to show combustion with piloted ignition and in Table 2 to indicate combustion without piloted ignition.
The results of cone calorimeter tests with piloted ignition for non-treated and treated specimens are presented in the form of graphs as a function of time: HRR (Fig.
For comparison, the graphs presenting CO concentration and extinction coefficient obtained during the combustion of the same type of specimens without piloted ignition are given in Figs.
a) the first peak at the initial stage of combustion with piloted ignition (between 40 and 100 s) with the highest value of about 204 kW/[m.
b) the second peak at the final stage of combustion with piloted ignition (between 900 and 1200 s) with the highest value of about 161 kW/m2 (t = 1145 s) for non-impregnated pine timber, 165 kW/[m.
CO concentration during the combustion process with piloted ignition is characterized by rapid growth in the first stage following approximately 30 s from the start of the experiment, and in the final combustion stage, following approximately 1175 s (see Figs.