Estudio Experimental Del Secado a Temperaturas Convencionales De Acacias

Abstract

RESUMENEntre las especies del género Acacias, la Acacia melanoxylon o aromo australiano y la Acacia dealbata o aromo chileno, son dos especies aclimatadas en Chile con un interesante potencial industrial. En este trabajo, se estudian programas de secado a temperaturas convencionales y la calidad de la madera seca de A. melanoxylon y A. dealbata.Experimentalmente son realizados 8 ensayos de secado a temperaturas convencionales, usando un horno de secado convectivo de 0.3 m 3 de capacidad. El diseño experimental incluye como factores variables la especie (A. melanoxylon y A. dealbata), el espesor de la madera (25 y 50 mm) y el tipo de corte (tangencial y radial).Los resultados indican que para 25 o 50 mm de espesor, la A. melanoxylon y la A. dealbata, en corte radial y tangencial se dejan secar satisfactoriamente bajo un mismo programa de temperaturas convencionales. La calidad de la madera seca se ve favorecida por la carencia de colapso y la baja anisotropía de la contracción transversal.Palabras clave: calidad de secado, contracción, Acacia melanoxylon, Acacia dealbata. ABSTRACTAcacia melanoxylon and Acacia dealbata are two Australian species well acclimated in Chile, both wood species with an interesting industrial potential. In this work, has been studied kiln drying runs and the wood drying quality of the sawn wood of Acacia melanoxylon and Acacia dealbata during kiln drying at conventional temperatures.Eight tests of kiln drying to conventional temperatures are made, using a convective drying of 0,3 m 3 of capacity. The experimental design includes as variable the species (A. melanoxylon an A. dealbata), the wood thickness (25 and 50 mm) and the cut-type (fl atsawn-wood and quartersawn-wood). The wood drying quality on the basis of European and Chilean standards is evaluated.The results show that for a same thickness, both species A. melanoxylon and A. dealbata, in fl atsawn

Xilotecnia of the wood of Acacia schaffneri from the State of Hidalgo, Mexico

“…Acacia schaffneri presented tangential and radial shrinkage values lower than those of Acacia melanoxylon and Acacia dealbata, although the shrinkages of these species are at 12% MC (Ananías et al 2008, Igartúa et al 2009). Classification Very high (Fuentes et al 2002) High (Fuentes et al 2002) High (Vignote and Jiménez 1996) S.D.…”

Assessing Treatments to Mitigate End-Face Cracking in Air-Dried <em>Acacia dealbata </em>Logs

“…In Chile, a technical report from the Forestry Institute [34] reports mean density values of 495 kg/m 3 , 11,515 MPa of MOE, and 65.7 MPa of flexural strength for Acacia dealbata, which are higher than those of the reference species for use in construction (Pinus radiata Link). Also, using conventional kiln-drying on 25 and 50-mm boards of Acacia melanoxylon and Acacia dealbata, Ananias et al [35] achieved satisfactory results with wood free of cracks or "collapse". These results present an opportunity to explore the suitability of Mimosa logs in truss structures, which utilize smaller, shorter (therefore, lighter) axially loaded components.…”