Print Email Facebook Twitter Brittleheart as a critical feature for visual strength grading of tropical hardwood - Approach of detection Title Brittleheart as a critical feature for visual strength grading of tropical hardwood - Approach of detection Author Kuisch, H. Gard, W. Botter, E. van de Kuilen, J.-W. Publication year 2012 Abstract Brittleheart is a well-known phenomenon in many tropical wood species which reduces the strength properties considerably. According to national strength grading standards such as BS 5756 and NEN 5493, timber with brittleheart has to be rejected. In many cases, however, brittleheart is not visible on the outer surface and the cross section of sawn timber. This investigation has been focused on qualitative characterisation of compression failures in tropical hardwood in conjunction with non-destructive detection methods. Five grades of compression failures have been characterised by deformation and displacement of wood tissue. Preliminary results show that CT-scanning is a promising technique for detecting the defined grades. However, limitation of detection is due to the resolution of the scanners and contrast ability of imaging. Quantitative studies of brittleheart on mechanical properties are continuing. Subject Building Engineering & Civil EngineeringBM - Building MaterialsTS - Technical SciencesBuildings and InfrastructureMaterialsBuilt EnvironmentBrittleheartCompression failuresCT scanningMorphological characteristicsTropical hardwood To reference this document use: http://resolver.tudelft.nl/uuid:d30d026a-3ba0-4388-b393-e61f9a401c56 TNO identifier 469153 ISBN 9781622763054 Source World Conference on Timber Engineering 2012: Timber Engineering Challenges and Solutions, WCTE 2012, 15 July 2012 through 19 July 2012, Auckland, 1, 20-29 Document type conference paper Files To receive the publication files, please send an e-mail request to TNO Library.