HDPE Geomembrane Welding in Cold Weather: Trial Seams, Temperature Window and Stop-Work Criteria

The results of the test are linked to ambient temperature, membrane surface temperature, wind speed, and the result of the test, reducing the winter frost and cracking.

The results of the test are linked to ambient temperature, membrane surface temperature, wind speed, and the result of the test, reducing the winter frost and cracking.

Construction lessons

Customer pain points and project conclusions

In winter construction, the temperature of the mill cannot be increased. The membrane surface freezes, water is frozen, the wind cools and the material shrinks shrink the process window. Each time the mill is opened, the weather changes significantly, the equipment or the mill is replaced, the mill should be retested to strip the shape of the damaging and the strength to determine the speed, temperature and pressure combination.

Construction lessons

Steps to landing

  1. Hurricane drying areasThe rolling materials are pre-tempered and the film is not allowed to be lit.
  2. Complete the testStarting with conservative parameters, small steps are adjusted and tested.
  3. Scanning of the sectionThe air pressure test is covered and the defects are immediately identified and corrected.

Construction lessons

Common risks and addressing them

  • The membrane is siltless but condensedThe water membrane that is not visible to the naked eye causes a vagus appearance.
  • The pursuit of speed is too hotThe surface may be burned or the body may be removed, reducing the effective width of the tube.

Construction lessons

Procurement and Acceptance Checklists

The checkpointControl requirementsDelivery of evidence
The surface of the front of the tubeDry, no mud, no sandClean records and photos
Try it.The two-track bridge is complete, disruptive form qualifiedTry the sample number
Environmental monitoringTemperature, membrane temperature, wind speed recorded as frequenciesConstruction logs

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