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Descripción
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| Cork is the main non-wood forest product in the western Mediterranean; development of its potential uses requires a detailed knowledge of its properties. One of the variables affecting cork behaviour is moisture content, currently determined by means of electric resistance moisture meters. We have studied the hygroscopic behaviour of different types of cork products (natural and agglomerated), and obtained electrical resistance-moisture curve for each. Specimens were conditioned in climate chambers (20ºC, four different relative humidity ?RH,%- conditions). Equilibrium moisture (EMC, %) and electrical resistance (R,?) were determined for each specimen. Resistance-moisture curves were adjusted using the equation: log (log (R) + 1) = a + b?EMC. Results showed significant differences for EMC and R-EMC curves among the different types. Individual models adjusted better (R2 between 0.909 and 0.992) than the aggregated model, and showed smaller typical errors (0.01 %EMC - 0.04 %EMC vs 0.05 %EMC). The aggregated model showed systematic errors up to 1 %EMC (for RH=85%). We have concluded that precision of resistance hygrometers increases significantly by using resistance-moisture curves adjusted for each type. | |
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Internacional
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Si |
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DOI
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Edición del Libro
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Editorial del Libro
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Nova Science Publishers |
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ISBN
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978-1-62081-986-9 |
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Serie
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Materials and Manufacturing Technology |
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Título del Libro
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Wood and Wood Products |
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Desde página
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109 |
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Hasta página
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124 |