Performance of Corrugated Pipe Manufactured with Recycled Polyethylene Content (2011) / Chapter Skim
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Appendix G - Proposed Draft Standard Specification for Recycled Content Containing HDPE Resin Formulations for Corrugated Pipe Made to AASHTO Standard M294-Recycled
Appendix G - Proposed Draft Standard Specification for Recycled Content Containing HDPE Resin Formulations for Corrugated Pipe Made to AASHTO Standard M294-Recycled
Pages 85-93
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G-1 A P P E N D I X G Proposed Draft Standard Specification for Recycled Content Containing HDPE Resin Formulations for Corrugated Pipe Made to AASHTO Standard M294-Recycled
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of Plastics by Displacement D1238, Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer D1505, Test Method for Density of Plastics by the Density-Gradient Technique D3895, Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry D4218, Test Method for Determination of Carbon Black Content in Polyethylene Compounds By the Muffle-Furnace Technique D4703, Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets D5630, Test Method for Ash Content in Plastics
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Commonly known as "Repro." ______________________________________________________________________ 4. REQUIRED PROPERTIES 4.1 The required properties for corrugated pipe resins containing recycled HDPE are given in Table 1.
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Property Test Method Sample Specified Value Frequency Density ASTM D1505 ASTM D792 Pellets/Plaque >0.947- 0.955 a g/cm 1 per shif t Melt Index ASTM D1238 190°C/2.16 Kg Pellets/Plaque <0.4 g/10 min 1 per shift % Volatiles 175°C/1 Hour Pellet s b <0.2 % Certif y c % Carbon Black ASTM D4218 Pellets/Plaque 2-4 % 1 per shift % Ash ASTM D5603 Pellets/Plaque <0.5 % 1 per shift % PP DSC Section 7.6 Plaque <5.0 % 1 per lot d Flexural Modulus ASTM D790 Plaque >130,000 psi 1 per lot Yield Stress ASTM D63 8 e Plaque >3500 psi 1 per lot Break Strain ASTM D63 8 f Plaque >200 % 1 per lot NCLS Stress- Crack Test ASTM F2136 Plaque 36 hrs 1 per lot OIT ASTM D3895 Pellets/Plaque 50 min g 1 per lot BFF Stress- Crack Test Section 7.9 80°C/650 psi Plaque 200 hrs 1 per lot a Correct for carbon black by D cor = D – 0.0044C, where C is % carbon black. b Tested on pellet samples before melt blending.
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______________________________________________________________________ 7. TEST METHODS 7.1 Test Conditions – Unless otherwise specified in the test methods or in this specification, conduct tests at the standard laboratory temperature of 23 2°C (73.4 3.6 °F)
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Exo Up Universal V4.5A TA Instruments Figure 1. DSC curve of HDPE containing PP generated.
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7.6.3 Integrate the curve from a flat point before the PP melting to a point where the PP curve returns to baseline. 7.6.4 Mark the point where the HDPE melt returns to baseline.
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7.8.3 Report five results, average, and standard deviation. 7.9 NCLS Stress Crack Test – Test 1.9-mm plaque for slow-crack growth with ASTM F2136 with a notch depth of 20% of the test specimen thickness and under an applied load of 4,100 kPa (600 psi)
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7.9.2 Five replicates are tested and the average and standard deviation reported.
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