Tools and materials required:
– Press machine
– Iron hemispherical steel in the hollow area of 1 cm2 (Ø 1.13 cm)
– Ruler measuring
– Wooden size of 5 x 5 x 15 cm
Investigation Method:
– Prepare a test piece with a size of 5 x 5 x 15 cm
– Put the specimen on a machine press
– Samples tean with steel ball Ø 1.13 cm to the ball as deep as ½ x diameter
– Testing of violence committed against both field / end and fourth field side.
– Calculate the load of the field testing of the figures obtained average hardness of the end of the radial and tangential.
a. Firmness examination Slide Wood
Tools and materials required:
– Press machines and equipment
– Saws
– Wooden size of 3 x 4 x 8 cm
Investigation Method:
– Prepare the test specimen as in the picture
– Place the specimen on the brace sought not to objects slide field continuously with a speed of 0.6 mm / min
– Record the timber when the load shifted
– Calculate the firmness of sliding parallel to the wood fibers
b. Shopping Firmness parallel examination Fiber
Tools and materials used
– Engine drag and perlengkpannya
– Drill Ø 2,5 cm
– Saws
– Ruler measuring
– Wood 4 x 5 x 9.5 cm
Investigation Method:
– Prepare a test object such as a picture
– The specimens were put on a tensile machine
– Run the tensile machine with a speed of 2.5 mm per minute
– The result is flawed p kg if bend test split
c. Examination Density
Tools and materials required:
– Oven
– Scales the nearest 0.1 gram
– Saws
– Gauge / meter
– Wood with a size of 5 x 5 x 5 cm
Investigation Method:
– Prepare the specimen with ukuran5 x 5 x 5 cm
– Determination of the density of the test specimen has kadarair 15% and dry air
– The test specimen is weighed for example (a gram)
– Volume is measured by immersion method
Fill water in a measuring cup (.xml)
The specimens were soaked first few minutes
Put the specimen into a measuring cup containing water
After the specimen into the measuring cup, the water will rise to (Y ml)
The volume of the test object can be searched is Y minus X ml ml
Calculate the density of the wood by the formula:
d. Radial and Tangential Shrinkage examination
Tools and materials required:
– Ruler sliding (sigmat)
– Saws
– Oven
– Wood with a size of 2.5 x 2.5 x 20 cm
Inspection Method
– Prepare a test piece with a size of 5 x 5 x 5 cm in a clean state
– The test specimen is weighed example A gram
– The specimens were dried in an oven at a temperature of 103 ± 2 ° C to constant weight
– After that the test specimen is weighed example B g
– The percentage of moisture content of wood can be calculated