Influence of moisture content on the wave velocity to estimate the mechanical properties of large cross-section pieces for structural use of Scots pine from Spain
Document title: Influence of moisture content on the wave velocity to estimate the mechanical properties of large cross-section pieces for structural use of Scots pine from Spain
Journal: Maderas : ciencia y tecnología
Database:
System number: 000544662
ISSN: 0718-221X
Authors: 1
1
1
2
Institutions: 1Technical University of Madrid, ETSI Montes, Madrid. España
2Forest Research Centre, Wood Technology, Madrid. España
Year:
Season: Abr
Volumen: 17
Number: 2
Pages: 407-420
Country: Chile
Language: Inglés
English abstract The aim of this research is to evaluate the influence of the moisture content of wood on stress wave velocity, as a nondestructive technique for estimating the mechanical properties of gross cross-section Spanish Scots pine (Pinus sylvestris L.) lumber for structural use. 26 100 x 150 x 3000 mm pieces from Segovia, Spain, were tested with different moisture content values, from 35,5 to 9%. Measurements of longitudinal stress wave velocity were carried out during the natural drying process by using three commercial portable devices based on ultrasonic, acoustic and vibrational techniques. The results can be summarized as three percentage points of decreasing velocity per percentage point of increased wood moisture content in the range from 11,8 to 21,4%: 0,48% for ultrasonic, 0,50% for acoustic wave and 0,65% for longitudinal vibration.
Keyword: Mechanical properties,
Moisture content,
Nondestructive techniques,
Pinus sylvestris
Full text: Texto completo (Ver HTML) Texto completo (Ver PDF)