Download pdf - Testing Report - CBR Result

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 (80⁰C water bath, 24 h)

2) Moisture content test (Dry oven 80⁰C, 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



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



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





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



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, cm342 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



Volume of sample, cm341 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



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