Investigating the physical quality of synthetic envelopes and their performance for Khuzestan soils

The purpose of this research was to evaluate the production quality of synthetic envelopes produced in Khuzestan factories and their performance in north and south Khuzestan soils, using laboratory methods. For quality control of the manufactured synthetic envelopes, first KOMO Standard tests were conducted followed by laboratory tests using upflow permeameter designed by Vlotman for these soils. Measured parameters in these tests were, discharge, Gradient Ratio and soil particle movement from the synthetic envelopes for soils of Dehkhoda and Ramshir projects. All Three types of pp450 synthetic envelopes A, B, and C manufactured in Khuzestan passed KOMO Standard test evaluations in this investigation. As to permeameter test results and Gradient Ratio tests (GR) envelope C for Ramshir soils and A for Dehkhoda soils were found suitable. It is therefore recommended to use these synthetic envelopes produced in Khuzestan soils with caution. These envelopes are more suitable where water table is to be lowered slowly to prevent rapid soil moisture depletion.