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Tensile test

Table. The Average thickness of samples A, B and C.

Sample Thickness (mm)1st 2nd 3rd Average

A 1 1.74 1.69 1.71 1.71

2 1.76 1.70 1.73 1.73

3 1.77 1.71 1.70 1.734 1.73 1.70 1.70 1.725 1.72 1.68 1.70 1.70

B 1 1.74 1.70 1.83 1.76

2 1.73 1.68 1.80 1.74

3 1.75 1.72 1.89 1.774 1.72 1.70 1.81 1.76

5 1.75 1.71 1.83 1.76C 1 2.03 2.03 2.06 2.05

2 1.96 1.97 1.97 1.97

3 1.87 1.88 1.92 1.894 2.06 2.06 2.06 2.065 2.07 2.06 2.07 2.07

Cross section area = thickness x width

Compound A

(mm2)Compound B

(mm2)Compound C

(mm2)

1 11.456 13.120 13.120

2 11.456 12.608 12.608

3 11.456 11.648 12.096

4 11.392 11.648 13.184

5 11.328 11.648 13.248

Tensile stress =

Figure : Stress versus Elongation for compound A, B, C

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Table :

Break stress

(MPa)Break strain

(%)M100% M300% M500% M700%

1

2

3

45

Average

Standarddeviation

Tear Test

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Sampl

e

Thickness (mm) Maximum Load

(kN)

Maximum

Load/Thickn

ess (N/mm)

1st 2nd 3rd Avera

ge

A 1 1.93 1.89 1.86 1.89 0.01788 9.4602 1.86 1.88 1.91 1.88 0.01273 6.771

3 1.84 1.85 1.87 1.85 0.01797 9.7144 1.79 1.81 1.85 1.82 0.01433 7.8745 1.79 1.77 1.83 1.79 0.01300 7.263

Average 0.01518 8.216

B 1 1.92 1.86 1.84 1.87 0.01226 6.5562 1.89 1.84 1.82 1.85 0.01276 6.8973 1.90 1.85 1.82 1.86 0.01196 6.4304 1.86 1.81 1.81 1.83 0.01064 5.814

5 1.85 1.79 1.81 1.82 0.01082 5.945Average 0.01169 6.328

C 1 2.05 2.00 2.00 2.02 0.00658 3.257

2 2.04 2.00 2.01 2.02 0.00713 3.5303 2.00 1.95 2.01 1.97 0.00450 2.2844 2.01 1.96 2.07 2.01 0.00577 2.8715 2.03 1.96 1.97 1.99 0.00794 3.990

Average 0.00638 3.186

Hardness test:

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Sample

Wallace dead load tester

(IRHDs)Rapid hardness tester (IRHDs)

1 2 3 Average 1 2 3 Average

A

1 38.0 37.0 39.0 38.0 39.0 39.0 38.0 38.72 38.0 39.0 36.0 37.7 37.0 38.0 39.0 38.03 36.0 38.0 36.0 36.7 39.0 38.0 37.0 38.0

Average 37.5 Average 38.2

B

1 32.0 31.0 30.0 31.0 29.0 28.0 32.0 29.72 33.0 34.0 35.0 34.0 28.0 31.0 30.0 29.73 31.0 32.0 29.0 30.7 32.0 29.0 31.0 30.7

Average 31.9 Average 30.0

C

1 45.0 46.0 44.0 45.0 44.0 43.0 45.0 44.02 45.0 47.0 45.0 45.7 46.0 45.0 45.0 45.33 46.0 47.0 45.0 46.0 44.0 45.0 44.0 44.3

Average 45.6 Average 44.5

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CompressionCOMPRESSION

COMPOUND

SAMPLENO

THICKNESS(mm)

BEFORECOMPRESS

AFTERCOMPRE

SS

A

1 12.32 10.85

2 12.89 10.78

3 12.60 10.89

4 12.59 10.68

Average 12.60 10.80

B

1 12.29 9.89

2 12.14 9.76

3 12.19 9.83

4 12.25 9.80

Average 12.22 9.82

C

1 12.44 12.30

2 12.48 12.30

3 12.61 12.28

4 12.38 12.11

Average 12.48 12.25

COMPOUND

SAMPLENO

Diameter(mm)BEFORECOMPRE

SS

AFTERCOMPRE

SS

A

1 31.25 27.37

2 31.41 27.47

3 31.51 27.47

4 31.29 27.50

Average 31.37 27.45

B

1 32.72 27.49

2 32.98 27.53

3 32.94 27.61

4 32.94 27.60

Average 32.90 27.56

C 1 29.04 27.65

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2 28.86 27.67

3 28.93 27.75

4 28.82 27.72

Average 28.91 27.70

COMPOUND

SAMPLENO

WEIGHT

BEFORECOMPRE

SS

AFTERCOMPRE

SSA 1 7.68 7.65

2 7.73 7.71

3 7.75 7.72

4 7.62 7.59Average 7.70 7.67

B 1 7.76 7.73

2 7.71 7.68

3 7.78 7.75

4 7.76 7.74

Average 7.75 7.73

C

1 7.47 7.42

2 7.50 7.45

3 7.46 7.41

4 7.47 7.42Average 7.48 7.43

Compression set = (t0 tr) / (t0 tc) x 100%

Compression set for A =

Compression set for B =

Ressilence

Wallace Dunlop Tripsometer

Sample Wallace Dunlop Tripsometer

Karl Frank pendulum

1 2 3 Average 1 2 3 Average

A

1 21 20 21 20.7 51 50 50.5 50.52 22 22.5 23 22.5 52 52 51 51.73 22 24 23 23 52 51.5 51 51.5

Average 22.1 Average 51.2

B1 21 20 20.5 20.5 48 47.5 48 47.82 22 23 22 22.3 49 49 49 493 21 21 23 21.7 48 49 48.5 48.5

Average 21.5 Average 48.4

C

1 23 23.5 23 23.2 62 61.5 62 61.82 23 23 23 23 60 60 59 59.73 23 23.5 23.5 23.3 61 60 61.5 60.8

Average 23.2 Average 60.8

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the average of % resilience for samples A = (1 cos 22.1) / (1 cos 45) x 100=25.08%

the average of % resilience for samples B = (1 cos 21.5) / (1 cos 45) x 100= 23.76%

the average of % resilience for samples C = (1 cos 23.2) / (1 cos 45) x 100= 27.61%

Karl Frank pendulum

the average of % resilience for samples A = (1 cos 51.2) / (1 cos 90) x 100= 37.33%

the average of % resilience for samples B = (1 cos 48.4) / (1 cos 90) x 100= 33.61%

the average of % resilience for samples C = (1 cos 60.8 ) / (1 cos 90) x 100= 51.2%

Abrasion test :

Compound A B C

Weight of sample before trial run (g) 35.05 35.84 34.08

Weight of sample after trial run 500 rev (g) 34.96 35.70 33.78Loss in weight on trial run (g) 0.09 0.14 0.30Specific gravity of compound 0.945 0.971 0.915Volume loss on trial run (cc.) 0.095 0.144 0.328Running-in period (revs.) 195 103 172Condition of compound collapsed collapsed collapsed

Table 3 : tensile test data for compound A

Break stress

(MPa)Break strain

(%)M100% M300% M500% M700%

1 10.55 1050.6 0.457 0.974 1.80 3.77

2 12.26 1045.3 0.426 0.951 1.82 3.75

3 12.92 995.6 0.489 0.996 1.78 3.96

4 11.35 1030.5 0.496 0.957 1.75 3.69

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5 10.24 1011.5 0.435 0.975 1.79 3.74

Average 11.464 1026.7 0.4606 0.976 1.788 3.782

Standarddeviation 1.02

20.640.028 0.016 0.023 0.0982

Table 4 : tensile data for compound B

Break stress

(MPa)Break strain

(%)M100% M300% M500% M700%

1 9.23 1058.6 0.435 0.88 1.49 3.75

2 8.75 1054.2 0.485 0.81 1.43 3.69

3 8.23 1045.6 0.504 0.79 1.39 3.56

4 9.12 1055.8 0.398 0.92 1.58 3.89

5 8.01 1052.9 0.423 0.83 1.42 3.48

Average 8.668 1052.83 0.449 0.846 1.462 3.674

Standarddeviation

0.48 4.35 0.0395 0.048 0.067 0.144

Table 5 : tensile data for compound C

Break stress

(MPa)Break strain

(%)M100% M300% M500% M700%

1 13.62 901.45 0.618 1.45 2.81 6.56

2 12.56 895.36 0.578 1.59 2.89 5.98

3 12.87 910.21 0.702 1.69 2.54 6.15

4 14.69 889.33 0.598 1.79 2.12 6.23

5 12.89 895.87 0.656 1.21 2.99 5.78

Average 13.326 898.44 0.6304 1.546 2.67 6.14

Standarddeviation

0.766 7.02 0.044 0.202 0.313 0.261

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Compression set

Table 4 : compression set resultsCOMPRESS

COMPOUNDSAMPLE

NO

THICKNESS(mm)

(t0) (tr)

(ts)

A

1 12.32 11.7010.85

2 12.89 11.7510.78

3 12.60 11.8510.89

4 12.59 11.6810.68

Average 12.60 11.7510.80

B

1 12.29 10.109.89

2 12.14 10.309.76

3 12.19 10.489.83

4 12.25 10.299.80

Average 12.22 10.299.82

C

1 12.44 12.41

12.30

2 12.48 12.30

12.28

3 12.61 12.51

4 12.38 12.3012.11

Average 12.48 12.4212.25

Compression set = (t0 tr) / (t0 ts) x 100%Compression set for A = (12.60-11.37) / (12.60-10.80) x 100% = 47.22%

Compression set for B = (12.22 10.29) / (12.6 - 9.82) x 100% = 69.42%

Compression set for C = (12.48 12.42) / (12.48 12.25) x 100% = 26.10%

12.45