Physical and mechanical properties of Eucalyptus grandis x E. tereticornis hybrid grown in Argentina
Physical and mechanical properties of Eucalyptus grandis x E. tereticornis hybrid grown in Argentina
(*) INTA : National Agriculture & Livestock Reserach Institute
Entre Ríos province - ARGENTINE
(*) INTA : National Agriculture & Livestock Reserach Institute
Entre Ríos province - ARGENTINE
Ing. Ftal. Martín Sánchez Acosta, et al. INTA (*)Ing. Ftal. Martín Sánchez Acosta, et al. INTA (*)
IUFRO 2007 D5 Conference - TaipeiIUFRO 2007 D5 Conference - Taipei
INTA :Experiment Station INTA :Experiment Station Concordia – Entre RíosConcordia – Entre Ríos
ConcordiaConcordiaConcordiaConcordia
Entre RíosEntre Ríos
Objetives :
Main:
Determination of the wood´s properties of the “new promissory hybrid E. grandis x E tereticornis” , planted in Argentine
Complementary:
- Comparisson with E. grandis & E. tereticornis
- Basic information for genetic breeding
Objetives :
Main:
Determination of the wood´s properties of the “new promissory hybrid E. grandis x E tereticornis” , planted in Argentine
Complementary:
- Comparisson with E. grandis & E. tereticornis
- Basic information for genetic breeding
E grandis. 1.2 years old - 10 meters high.-
E grandis with irrigation: 6 months old -Argentina
Material :
- Trees from genetic assays
- E. grandis x E tereticornis - References E. grandis (Argentine)- References E. tereticornis (Argentine) (Tinto, Labate, Hernitz)
- Age : 10 years - dbh : 34 cm - heigth : 30 m - IMA : 40 m3/ha/yr aprox.
Material :
- Trees from genetic assays
- E. grandis x E tereticornis - References E. grandis (Argentine)- References E. tereticornis (Argentine) (Tinto, Labate, Hernitz)
- Age : 10 years - dbh : 34 cm - heigth : 30 m - IMA : 40 m3/ha/yr aprox.
Metod: Standars : ASTM (EEUU) – IRAM (ARG)Metod: Standars : ASTM (EEUU) – IRAM (ARG)
Results by Properties Results by Properties
Density (14% m.c) Density (14% m.c)
grandis Hybrid tereticornis
Kg/dm3
1000
900
800
700
600
500
400
300
200
100
490690
850
18 n.s. 18 n.s.
Static bending(Modulus of elasticity) Static bending(Modulus of elasticity)
Kendall S. Africa
N
25000
20000
15000
10000
5000
11000
1950022000
15 n.s.15 n.s.
grandis
Janka Hardness (tg) Janka Hardness (tg)
grandis hybrid teretricornis
N
6500
6000
5500
5000
4500
4000
3500
3000
2500
200030
4860
Ns 18Ns 18
Removal of nails (tg) Removal of nails (tg)
grandis hybrid teretricornis
N
1300
1200
1000
900
800
700
600
500
400
300
707
1100 ?
NS 18NS 18
Shrinkage (tg. green to 0%) Shrinkage (tg. green to 0%)
grandis hybrid teretricornis
%
24
22
20
18
16
14
12
10
8
6
17.0
11.0 13.4
NS 19NS 19
T/R relationship T/R relationship
grandis hybrid teretricornis
Ns : 97CV: 14 %Ns : 97CV: 14 %
T/R
2.8
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
1.91.6
2.1
2.02.0
Relative situation compared with E. grandis
Relative situation compared with E. grandis
Density Hardness MOE
%
100
90
80
70
60
50
40
30
20
1040
Shrinkage T/R
50
75
15 40
Aptitude Aptitude
- Structural uses (construction - poles) - Structural uses (construction - poles)
- Structural uses (plank m., pallets – boxes)- Structural uses (plank m., pallets – boxes)
- Furnitures (semi-heavy weight)- Furnitures (semi-heavy weight)
- Gral. carpentry - joinery- Gral. carpentry - joinery
- Flooring (better than grandis)- Flooring (better than grandis)
- Laminated panels (plywood – LVL)- Laminated panels (plywood – LVL)
Conclussions:
- The density is intermediate, close to teret.
- In general, the mechanical values are higher than grandis and lower than tereticornis
- Better values of estability t/r shrinkage
- The color is rose – red , intermediate between grandis & tereticornis
- The values are good for floors, and structural and general uses (furniture – houses, carpentry, etc)
- good relationship density/resistance
Conclussions:
- The density is intermediate, close to teret.
- In general, the mechanical values are higher than grandis and lower than tereticornis
- Better values of estability t/r shrinkage
- The color is rose – red , intermediate between grandis & tereticornis
- The values are good for floors, and structural and general uses (furniture – houses, carpentry, etc)
- good relationship density/resistance
- An especial gratefulness to the Symposium´s Organization commite by the finnancial assistance
- An especial gratefulness to the Symposium´s Organization commite by the finnancial assistance
Acknowledgements
Edge glue panels –grandis
E. tereticornis
grandis x tereticornis EGP : hardness test
Red euc floors
JARRAH - Australia
Red eucalypts
Thermal water swimming pool- Red euc- Uruguay
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