Fracture Tester for Geomembranes

Compliance Standard

ASTM D 5397 - 93

Instrument Description

- Test 20 specimens at a time - Stainless - steel bath - Solid - state temperature controller - Circulating pump - Automatic low - liquid - level trip - Bath cover to reduce evaporation - Movable weight container - Digital timer and micro - switch - Bath motor drive device The fracture tester applies continuous pressure to high - density polyethylene geomembrane materials under accelerated environmental conditions. Use a precision scribing device to mark dumbbell - shaped specimens. Place the specimens on the tester and apply pressure to the samples through a container filled with lead weights, which is placed on a lever device. Put the samples in a bath containing a surfactant. The bath solution is maintained at 50°C, and the lifting of the bath is driven by a motor. The fracture time of each specimen is recorded by a separate timer. The bath and specimen fixing devices are made of refined stainless steel. The bath solution's correct temperature is maintained by a solid - state temperature controller and a heater at the bottom of the bath. The bath cover can reduce the evaporation of the bath solution. A pump is used to maintain the consistency of the bath solution's temperature and concentration. There is a low - liquid - level protection switch in the bath. When the liquid level is lower than the set value, the heater and the pump automatically stop working. A high - liquid - level protection switch is optional.