Loblolly Pine: Properties and Uses

Loblolly pine

Loblolly pine is a species of pine native to the Southeastern United States. Loblolly pines grow quickly and are often used in construction.

Loblolly Pine: Properties and Uses

  • General Name: Loblolly Pine
  • Scientific name: Pinus taeda 
  • Genera: Pinaceae
  • Places where these trees are found: Starting from the south of Maryland, the plain land near the bank of the Atlantic Ocean and the area from Pitmint plateau to the south of Florida and spread to the west of eastern Texas this Loblolly Pine is grown.

Physical Properties of Loblolly Pine

  • Color of the wood: Sapwood is yellowish-white, and heartwood is reddish-brown.
  • Structure of wood: Similar to Shortleaf and Slash pine.
  • Shrinkage: Moderately, the wood is highly shrinkable. To reach the green condition to the zero humidity state, the radial shrinkage, tangential shrinkage, and total volumetric shrinkages are 4.8%, 7.4%, and 12.3%, respectively. If the wood is dried correctly, then the wood is less distorted.
  • Workability: Easy and convenient.
  • Weight density and specific gravity: The Loblolly pine is comparatively less weight than the Longleaf pine and Slash pine in the Southern pine genera. Based on the volume in green condition and the weight in the zero humidity state, the specific gravity is 0.47 (density 481 kg per cubic meter), based on the volume of the state of 12% humidity and weight at the zero humidity state; the specific gravity is 0.51(density 522 kg per cubic meter).
  • Moisture in green condition: Heartwood and sapwood contain 33% and 110% humidity.
  • Natural durability: Heartwood and sapwood are grouped in the unsustainable class.
  • Seasoning properties: The wood can be dried at moderate speed, at a high temperature, in a state of flawless condition.
  • Treatability: The sapwood can be preserved in the pressure process, but the heartwood is not preservable.

Mechanical properties of Loblolly Pine

Loblolly pine is mechanically less strong than the Longleaf and Slash pine.

  • Modulus of rupture: In green condition 50.34 Newton per square millimeter (-7300 lb per square inch), in the state of 12% humidity, the modulus becomes 88.28 Newton per square millimeter (12800 lb per square inch). In the American National Standard, the modulus of rupture is defined as 55.17 Newton per square millimeter (8000 lb per square inch).
  • Modulus of Elasticity: In green condition, the modulus of elasticity of the wood is 0.0096 million Newton per square millimeter (1.40 million lb per square inch), in the state of 12% humidity, the modulus of elasticity becomes 0.00123 million Newton per square millimeter (1.79 million lb per square inch).
  • Work to maximum load: In green condition, the maximum load of this wood is 0.227 kg per cubic centimeter (8.2 lb per square inch). In the 12% humidity state, this parameter becomes 0.288 kg per cubic centimeter (10.4 lb per cubic inch).
  • Impact bending:In green condition and 12% humidity condition 76.2 cm (30 inch) height.
  • Compression parallel to grain- maximum crushing strength: In green condition, the strength is 24.21 Newton per square millimeter (3510 lb per square inch), in the state of 12% humidity, the parameter becomes 49.17 Newton per square millimeter (7130 lb per square inch).
  • Compression perpendicular to grain-fiber stress at the proportional limit: In green condition, the fiber stress at the proportional limit is 2.69 Newton per square millimeter (390 lb per square inch). In the state 0f 12% humidity, the parameter becomes 5.45 Newton per square millimeter (1390 lb per square inch)
  • Shear parallel to grain-maximum shearing strength: In green condition 5.93 Newton per square millimeter (860 lb per square inch), in the state of 12% humidity, this parameter becomes 9.59 Newton per square millimeter (1390 lb per square inch).
  • Tension perpendicular to grain- maximum tensile strength: In green condition, 1.79 Newton per square millimeter (260 lb per square inch), in the state of 12% humidity, this parameter becomes 3.24 Newton per square millimeter (470 lb per square inch).
  • Side hardness- load perpendicular to grain: In green condition, the side hardness is 204.12 kg (450lb). In the state of 12% humidity, this parameter becomes 312.98 kg (690 lb).

Uses of Loblolly Pine

Similar to the Longleaf and Slash pine.

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