Testing Report - CBR Result

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  • Testing report Date: 26/3/14

    1. Purpose : On 22/3/14, TD received customer complaint from local customer. CBR decking delaminated

    Rejected samples & good (non-installed) sample from same lot was returned to VB for testing.

    2. Test method : 1) Hot water immersion (80C water bath, 24 h)

    2) Moisture content test (Dry oven 80C, 48 h)

    3) Density test (inhouse method) - water displacement method

    4) Coating fusion test (Acetone)

    3. Result : 1) Hot water immersion test:

    No. Sample Judgement

    1 CBR - R1 (reject) Failed

    2 CBR - R2 (reject) Failed

    3 CBR - R3 (reject) Failed

    4 CBR - A (Good sample) Passed

    5 CBR - B (Good sample) Passed

    Photo (After hot water immersion test)

    Appearance change

    Both side coating shrink

    Both side coating shrink and delaminate

    Both side coating shrink and delaminate

    Not observed

    Not observed

  • 2) Moisture test:

    No. Sample Judgement

    Moisture

    Content (%)

    1 CBR - R4 (reject) Failed 0.47

    2 CBR - R5 (reject) Failed 0.41

    3 CBR - R6 (reject) Failed 0.40

    4 CBR - C (Good sample) Passed 0.44

    5 CBR - D (Good sample) Passed 0.44

    Photo (After moisture test)

    3) Density test:

    No. Sample Density (g/cm3)

    1 CBR - R1 (reject) 1.40

    2 CBR - R2 (reject) 1.35

    3 CBR - R3 (reject) 1.40

    4 CBR - R4 (reject) 1.42

    5 CBR - R5 (reject) 1.39

    6 CBR - A (Good sample) 1.44

    4) Fusion test:

    No. Sample

    1 CBR - R1 (reject)

    2 CBR - R2 (reject)

    3 CBR - R3 (reject)

    4 CBR - R4 (reject)

    5 CBR - R5 (reject)

    6 CBR - A (Good sample)

    Photo (After fusion test)

    Not observed

    Not observed

    Not observed

    Not observed

    Appearance change

    Side coating delaminated

    Side coating delaminated

    Side coating delaminated

    Not observed

    0.43

    0.44

    Average density of 5

    rejected samples:

    1.39

    Not observed

    Not observed

    Appearance change on coating layer

    Not observed

    CBR - R2 (Reject)

    CBR - R3 (Reject)

    CBR - R5 (Reject)

    CBR - R4 (Reject)

    CBR - R1 (Reject)

    CBR - A (Good Sample)

  • 4. Comment : 1) For hot water immersion test, all the rejected sample delaminate but the good sample (not

    installed) not delaminate.

    We suspect the reject sample is not same lot with the good sample (not-installed) due to

    the color of inner looks different.

    2)

    3) Density of reject sample is slightly lower (3.5% lower) than good sample's density.

    For coating fusion test, no significant appearance change was observed in all samples.

    Fusion is considered good.

  • Result:

    Hot water immersion

    1 2 3 4

    Sample nameCBR - R1 CBR - R2 CBR - R3 CBR - A Good

    Sample

    Initial weight (g) 228.15 228.13 228.00 226.85

    Final weight (g) 234.58 234.16 234.43 231.11

    Increased weight (%) 2.82 2.64 2.82 1.88

    Initial length (mm) 81.60 81.51 81.17 81.34

    Final length (mm) 82.41 82.21 82.64 82.00

    Increased length (%) 0.99 0.86 1.81 0.81

    Initial width (mm) 126.79 126.45 126.42 126.32

    Final width (mm) 127.59 127.48 127.67 127.38

    Increased width (%) 0.63 0.81 0.99 0.84

    Initial thickness (mm), Tc 5.90 5.75 5.77 5.90

    Final thickness (mm), Tc 6.37 6.76 6.92 6.60

    Increased thickness, Tc (%) 7.97 17.57 19.93 11.86

    Initial thickness (mm), Te 25.49 25.27 25.44 25.15

    Final thickness (mm), Te 25.58 25.99 25.89 25.58

    Increased thickness, Te (%) 0.35 2.85 1.77 1.71

    2) Moisture test

    Sample name

    CBR - R4 CBR - R5 CBR - R6 CBR - C Good

    Sample

    Initial weight (g) 216.94 221.63 218.91 227.25

    Final weight (g) 215.93 220.73 218.03 226.24

    Increased weight (%) -0.47 -0.41 -0.40 -0.44

    Initial length (mm) 78.17 79.26 77.95 81.49

    Final length (mm) 77.91 79.16 78.11 81.35

    Increased length (%) -0.33 -0.13 0.21 -0.17

    Initial width (mm) 126.72 126.91 126.72 126.31

    Final width (mm) 126.77 126.68 126.75 126.49

    Increased width (%) 0.04 -0.18 0.02 0.14

    Initial thickness (mm), Tc 5.90 5.92 5.98 5.89

    Final thickness (mm), Tc 5.92 5.94 5.97 5.94

    Increased thickness, Tc (%) 0.34 0.34 -0.17 0.85

    Initial thickness (mm), Te 25.38 25.5 25.44 25.17

    Final thickness (mm), Te 25.27 25.49 25.45 25.24

    Increased thickness, Te (%) -0.43 -0.04 0.04 0.28

  • 3) Density

    Sample R1 R2 R3 R4

    Weight (g) 58.59 59.56 57.37 62.32

    Initial volume of water (mL) 160 160 160 160

    Volume of water + sample (mL) 202 204 201 204

    Volume of sample, cm3 42 44 41 44

    Density (g/cm3) 1.40 1.35 1.40 1.42

    Sample

    Production date

    1 2 3 4

    Weight (g) 57.43 56.11 59.38 58.42

    Initial volume of water (mL) 160 160 160 160

    Volume of water + sample (mL) 201 200 204 202

    Volume of sample, cm3 41 40 44 42

    Density (g/cm3) 1.40 1.40 1.35 1.39

    Average

    Density checking from retained sample of July production: Density

    Inner material

    Production date

    Sample no 1 2 3 4

    Weight (g) 58.67 58.95 58.7 56.77

    Initial volume of water (mL) 160 160 160 160

    Volume of water + sample (mL) 202 202 202 200

    Volume of sample, cm3

    42 42 42 40

    Density (g/cm3) 1.40 1.40 1.40 1.42

    Average of same day sample

    Reject sample

    Re-do with random sample from Feb production:

    CBR (MIX-15)

    2/8/2014

    CBR (RCY-04)

    2/11/2014

    CBR (MIX-13)

    1.38 1.38

    1.40 1.41

    7/24/2013 7/25/2013

  • 5

    CBR - A Good

    Sample

    225.97

    230.22

    1.88

    81.02

    81.71

    0.85

    126.36

    127.26

    0.71

    5.90

    6.63

    12.37

    25.16

    25.54

    1.51

    CBR - D Good

    Sample

    226.91

    225.91

    -0.44

    81.36

    81.31

    -0.06

    126.14

    126.53

    0.31

    5.88

    5.94

    1.02

    25.16

    25.28

    0.48

  • Good sample

    R5 A1

    61.34 60.64

    160 160

    204 202

    44 42

    1.39 1.44

    CBR

    3/4/2014

    5 6 7 8 9 10

    57.65 60.46 56.94 56.87 58.76 56.66

    160 160 160 160 160 160

    202 204 201 200 202 202

    42 44 41 40 42 42

    1.37 1.37 1.39 1.42 1.40 1.35

    1.42

    CBR (RCY-02)

    7/26/2013 7/27/2013 7/12/2013

    5 6 7 8 9 10 11

    58.61 58.11 55.16 56.96 52.71 55.35 57.65

    160 160 160 160 160 160 160

    202 202 199 201 198 200 201

    42 42 39 41 38 40 41

    1.40 1.38 1.41 1.39 1.39 1.38 1.41

    1.40 1.38 1.41

    Reject sample

    Re-do with random sample from Feb production:

    CBR (RCY-04)

    2/11/2014

    Driftwood

    3/13/2014

    CBR (MIX-13)

    7/31/2013 8/1/2013

    1.38 1.37

    1.40 1.39

  • Density

    CBR (MIX-13)

    Production date 7/26/2013 7/27/2013 7/31/2013

    No 1 2 3 4 5 6 7

    58.67 58.95 58.7 56.77 58.61 58.11 55.16

    160 160 160 160 160 160 160

    202 202 202 200 203 202 199

    42 42 42 40 43 42 39

    Density 1.40 1.40 1.40 1.42 1.36 1.38 1.41

    7/24/2013 7/25/2013

  • CBR (RCY-02)

    8/1/2013 7/12/2013

    8 9 10 11

    56.96 52.71 55.35 57.65

    160 160 160 160

    201 198 200 201

    41 38 40 41

    1.39 1.39 1.38 1.41

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