Details
| Original language | English |
|---|---|
| Pages | 64-70 |
| Number of pages | 7 |
| Volume | 60 |
| Issue number | 1 |
| Journal | HOLZFORSCHUNG |
| Publication status | Published - Jan 2006 |
| Externally published | Yes |
Abstract
Thermal modification processes improve the durability and dimensional stability of wood, but strength properties, especially dynamic ones, are compromised. Results from standard dynamic strength testing, such as impact bending tests, suffer from high variability and therefore require a high number of replicates. To overcome this, a new test method named high-energy multiple impact (HEMI) was developed by investigating heat-treated Picea abies Karst., Abies alba Mill. and untreated Robinia pseudoacacia L. The method is based on crushing small specimens by thousands of impacts from pounding steel balls in a heavy vibratory mill. The level of destruction was determined by sieving and analyzing the size distribution of the fragments. We calculated the resistance to impact milling (RIM) based on the mass of the size fractions. RIM shows a linear correlation with the intensity of the thermal treatment. The HEMI test method has the following advantages: small number of specimens, short time for specimen preparation, small variances, and high reproducibility of results.
Keywords
- Crushing, Dynamic strength properties, Impact bending, Test method, Thermal modification, Treatment intensity
ASJC Scopus subject areas
- Materials Science(all)
- Biomaterials
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In: HOLZFORSCHUNG, Vol. 60, No. 1, 01.2006, p. 64-70.
Research output: Contribution to specialist publication › Contribution in non-scientific journal › Transfer
}
TY - GEN
T1 - Interrelationship between the severity of heat treatments and sieve fractions after impact ball milling
T2 - A mechanical test for quality control of thermally modified wood
AU - Rapp, Andreas Otto
AU - Brischke, Christian
AU - Welzbacher, Christian Robert
PY - 2006/1
Y1 - 2006/1
N2 - Thermal modification processes improve the durability and dimensional stability of wood, but strength properties, especially dynamic ones, are compromised. Results from standard dynamic strength testing, such as impact bending tests, suffer from high variability and therefore require a high number of replicates. To overcome this, a new test method named high-energy multiple impact (HEMI) was developed by investigating heat-treated Picea abies Karst., Abies alba Mill. and untreated Robinia pseudoacacia L. The method is based on crushing small specimens by thousands of impacts from pounding steel balls in a heavy vibratory mill. The level of destruction was determined by sieving and analyzing the size distribution of the fragments. We calculated the resistance to impact milling (RIM) based on the mass of the size fractions. RIM shows a linear correlation with the intensity of the thermal treatment. The HEMI test method has the following advantages: small number of specimens, short time for specimen preparation, small variances, and high reproducibility of results.
AB - Thermal modification processes improve the durability and dimensional stability of wood, but strength properties, especially dynamic ones, are compromised. Results from standard dynamic strength testing, such as impact bending tests, suffer from high variability and therefore require a high number of replicates. To overcome this, a new test method named high-energy multiple impact (HEMI) was developed by investigating heat-treated Picea abies Karst., Abies alba Mill. and untreated Robinia pseudoacacia L. The method is based on crushing small specimens by thousands of impacts from pounding steel balls in a heavy vibratory mill. The level of destruction was determined by sieving and analyzing the size distribution of the fragments. We calculated the resistance to impact milling (RIM) based on the mass of the size fractions. RIM shows a linear correlation with the intensity of the thermal treatment. The HEMI test method has the following advantages: small number of specimens, short time for specimen preparation, small variances, and high reproducibility of results.
KW - Crushing
KW - Dynamic strength properties
KW - Impact bending
KW - Test method
KW - Thermal modification
KW - Treatment intensity
UR - http://www.scopus.com/inward/record.url?scp=31144432379&partnerID=8YFLogxK
U2 - 10.1515/HF.2006.012
DO - 10.1515/HF.2006.012
M3 - Contribution in non-scientific journal
AN - SCOPUS:31144432379
VL - 60
SP - 64
EP - 70
JO - HOLZFORSCHUNG
JF - HOLZFORSCHUNG
SN - 0018-3830
ER -