EVALUATION ON THE CHEMICAL RESISTANCE OF GT COMPOSITES

초록

As GT are generally adopted for the above part of geomembrane(GM) as for waste landfills, it is very significant to consider the long-term performance of GT against chemical condition until a landfill is complete. In addition, the exposed temperature generally rises to about 80℃ in summer season due to corruption of food garbage and a landfill becomes more exposed to leachate solution as the period for reclamation has become longer. Therefore, it is needed to use GT proved invulnerable to such exposure in waste landfills. The needle punched non-woven GT of staple fibers mainly used as flooring material in waste landfills contain polypropylene and polyester as main raw materials, maintaining stability against acid and alkali but tending to decompose when exposed to ultraviolet [1,2].