ExperimentOnWood

Topics: Weighing scale, Mass, Wood Pages: 11 (1293 words) Published: April 23, 2015
Material Experiment:

WATER ABSORPTION OF
DIFFERENT TYPES OF WOOD

MARKEL CESAR A. LUNA /
CHERRY DARA S. REDULLA
1

SECTION SCDE
ARCH 257
Material Experiment: Water Absorption of Different Types of Wood by Markel Cesar A. Luna & Cherry Dara S. Redulla
Arch 257, Section SCDE
Prof. Carmen Bettina Silao Bulaong

The Experiment:
Which wood would absorb the least amount of water?

*The supplied experiment brief

2

Experiment Modifications:
1. Instead of limiting the experiment to five (5) kinds of wood, nine (9) more were used. In total, fourteen (14) species were tested.
2. Aside from the weight gain of the wood samples, thickness changes were also monitored and recorded.
3. Two types of scales were used: a “needle” weighing scale and a digital weighing scale (instead of a balance scale).

Limitations:
1. Only one (1) Round of Experiments was done on Pine Wood and Molave/Mulawin since only (1) one sample of each was available.
2. Several samples of some samples came from different sources; thus, some starting weights varied.

Materials:

Three (3) Sets of Wood Samples

Water

Digital Weighing Scale

Rocks

Pans

3

Ruler

Experiment Procedure and Results:
A. First Round of the Experiment
1. The Wood Samples for the first set were weighed and measured prior to submerging in water for the first twelve (12) hours, after which they were weighed and measured again. 2. The Wood Samples were submerged in water for another twelve (12) hours, then weighed after.

3. The Wood Samples were submerged in water again, but this time, for twenty-four (24) straight hours. The final weights and thicknesses were recorded.

Before Submerging in Water

First 12 Hours

After the First 12 Hours

Second 12 Hours

4

After the Second 12 hours (48 Hours)

The next 24 Hours

After a Total of 48 Hours
WOOD
TYPE

-

STARTING - AFTER FIRST - AFTER SECOND - AFTER NEXT - TOTAL ADDED - PERCENTAGE WEIGHT (g.) 12 HOURS (g.) 12 HOURS (g.)
24HOURS (g.)
WEIGHT (g.)
OF ADDED
(FINAL WEIGHT)
WEIGHT
KAMAGONG
133
138
140
143
10
7.5%
YAKAL

120

130

130

133

13

11%

MOLAVE

120

125

125

127

7

5.8%

BALAYONG

110

120

120

127

17

15%

NARRA

70

76

78

81

11

16%

SUFA/SUPA

68

72

75

77

9

13%

PINE WOOD

63

81

84

87

24

38%

TANGUILE

60

70

70

80

20

33%

GEMELINA

51

54

55

55

4

7.8%

MAPLE

50

64

69

76

26

52%

LOCAL TEAK

47

52

55

57

10

21%

MAHOGANY

46

52

53

56

10

22%

ALMACIGA

43

47

50

51

8

18%

ACACIA
MANGIUM

37

45

48

53

16

43%

*SWELLING/SHRINKAGE
WOOD TYPE - STARTING THICKNESS (mm.) - FINAL THICKNESS (mm.) - THICKNESS DIFFERENCE(mm.) KAMAGONG
20
20
0
YAKAL

23

22.5

5

-0.5

MOLAVE

19

19

BALAYONG

20

18.5

-1.5

NARRA

15

17

2

SUFA/SUPA

15

15

0

PINE WOOD

25

27

2

TANGUILE

19

20

1

GEMELINA

15

15

0
Continue Reading

Please join StudyMode to read the full document

Become a StudyMode Member

Sign Up - It's Free