Jindarat Maneecharoen creator Bergado, Dennes T. Chairperson Shibuya, Satoru Examination committee Kohgo, Yuji Examination committee The Government of Germany Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1997 continuing eng 94 leaves : ill. + 1 online resource In recent years, geotextiles both woven and nonwoven have been used extensively in civil engineering application. In order to investigate, the factors affecting to index and engineering prope1iies of the selected geotextile, different tests were conducted using both heat-bonded nonwoven and needle-punched nonwoven geotextile, namely: the effects of humidity on Apparent Opening Size (A OS), the effects of strain rate and clamping system on Wide-Width Tensile Strength, the effect of using tap water and de-aired water on both Permittivity and Transmissivity, and the effect of strain rate on Puncture Resistance. The results indicate that decreasing humidity slightly increased the AOS; higher strain rate and using hydraulic clamp increased the wide-width tensile strength; using de-aired water largely improved the permittivity and transmissivity; and increasing the strain rate also increased the puncture resistance. The effects of humidity and oxygen content were more profound and obvious in the case of needle- punched and obvious in the case of needle-punched nonwoven geotextile compare to heat-bonded nonwoven geotextiles. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering Thesis (M. Eng.) - Asian Institute of Technology Geotextiles Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B13414 http://203.159.5.9/ait-thesis/detail.php?q=B13414 970818 20260818113308.0