Standard Test Method for The Un-notched, Constant Ligament Stress Crack Test (UCLS) for HDPE Materials Containing Post- Consumer Recycled HDPE

Importancia y uso:

4.1 This test method is a way to evaluate the effects of contaminant particles found in HDPE products containing PCR-HDPE, primarily corrugated pipe. Particles of significant number, size and shape can reduce the slow crack growth resistance of the products. This test is performed in water without a controlled defect such as a notch. Since there is no notch, it is not necessary to use a surfactant in the water bath. It is a constant load test.

4.2 This test may be used to evaluate various blends of recycled and virgin materials. For example, a material with high stress crack resistance and few contaminants can be blended with materials that are less resistant to cracking to enhance the overall stress crack resistance of the blend.

4.3 The test can be conducted at various temperature and stress conditions. If at least three (3) different temperature/stress conditions are evaluated, an estimate of the service lifetime of the material can be predicted with the use of bi-directional shifting or the rate process method.

4.4 The test can also be performed under a single applied load and a single temperature to create a single point test useful for comparative purposes as well as for quality control.

Subcomité:

F17.40

Referida por:

F3556-24, F2306_F2306M-21, F2947_F2947M-21A, F3390-20R24, F2306_F2306M-21

Volúmen:

08.05

Número ICS:

59.080.70 (Geotextiles), 83.080.20 (Thermoplastic materials)

Palabras clave:

BFF; contaminant; corrugated HDPE pipe; corrugated plastic pipe; NCLS; post-consumer recycled HDPE; recycled materials; recycled plastics; UCLS;