Engineering properties of membranes as a contaminant wter barriers

[ONENGINEER]

1. Lining is required to place in the base of a mine waste rock fill of 10 m high and a slope of 3:1.
Commercial product specifications are available. From an engineering point of view what are the main parameters to consider to choose among various products?

2. What would be a desirable alongation to break?

Thank you.

 

[cvg]

what type of liner? HDPE / PE / GCL
bedding and cover layers required
geomembrane performance for heavy duty HDPE are:
GRAB TENSILE 350 lb [1557N] ASTM D5034-95
MULLEN BURST 670 psi [4623 kPa] ASTM D3786-01
HYDROSTATIC RESISTANCE 424 psi [2927 kPa] ASTM D751-00
MOISTURE VAPOUR TRANSMISSION 0.47 g/m²/24 hour (0.07 perms) ASTM E96, pr. B
PERMEABILITY <1.3x10-7 cm/sec ASTM D4491
PUNCTURE RESISTANCE, INDEX 205 lb [912 N] ASTM D4833-07

 

[ONENGINEER]

cvg, many thanks for the feedback. As well, do you regard the "alongation to break" as a decision making factor? If so how a geotechnical engineer relates the value for the "elongation to break" to the embankment slope stablity/settlement analysis? Thank you.

 

[cvg]

depends on the amount of differential settlement. if you expect a lot, than specify a meterial with higher elongation at break