Gökhan İmaçlı, Mehmet Rıfat KAHYAOĞLU, Burak Şengöz, Ali Topal, Ümit Halis Erdoğan

YOL iNSAATINDA KULLANILAN GEOTEKSTiLLERiN ÇEKME DAYANIMLARININ DOKU FARKLILIGI YONUNDEN iNCELENMESi

Giiniimiizde karayollanndaki trafik hacmindeki ve tasit dingil yiiklerindeki artislar ile birlikte, yol tasanmlannda yapilan yanhshklar ve imalat hatalan, yol ustyapilarmda yorulma ve dusuk catlaklanna ve ozellikle tekerlek izi olusurnlan gibi kalici deformasyonlara sebep olmaktadir. Kaplamalarda gorulen bozulmalan en aza indirmek amaciyla geotekstiller; stabilizasyon veya guclendirme fonksiyonlanndan yararlarnlarak kullarulrnaktadrr. Geotekstiller bu fonksiyonlan sayesinde, yol ustyapisuun dayarurmru arttirarak kaplamarun davrarusiru belirgin bir sekilde etkilemektedir. Kullamlacak geotekstilin cekme dayarnrm ne kadar yiiksek olursa, yol kaplamalanrun kahci deformasyonlara karst direnci de 0 kadar fazla olmaktadir. Bu cahsmada, yol ustyapisi ozelliklerini iyilestirme amaciyla kullamlan dokumah ve dokumasiz geotekstillerin miihendislik ozellikleri verildikten soma farkli tip (dokurnasiz igne ile birlestirilmis, dokumasiz siirekli flament, dokumah yassr film seritli) ve yogunluklardaki (200 gr/rrr', 300 gr/rrr', 400 gr/m", 450 gr/m'') geotekstil ornekleri iizerinde ASTM 4595-86'e gore "Genis En Cekme Dayamrm" ve ASTM 6241-98'e gore "Statik Delinme Dayamrru" deneyleri uygulanarak mukavemet ozellikleri karsilastmhp yol insaatmda kullamlabilirlikleri degerlendirilrnistir,

Anahtar Kelimeler:

Geotekstil, Cekrne dayarurru, Statik delinme dayamrru, Doku

THE DETERMINATION OF TENSILE STRENGTH OF DIFFERENT TEXTURED GEOTEXTILES USED IN ROAD CONSTRUCTION

The raise in the level of traffic and axle loads along with the construction errors and climatic conditions in the last decade has caused failures in pavements such as fatigue and low temperature cracking as well as permanent deformation. In order to minimize the above mentioned failures, geotextiles have been successfully employed by using their stabilization and reinforcement functions. Owing to these functions, geotextiles increase the strength of the pavement. In general, the higher tensile strength value the geotextiles have, the more resistive the pavement to permanent deformation This study aims to determine the properties of different types (continuous flament non-woven, needle punched non-woven, slit film yarns woven) of geotextiles that have different densities (200gr/m2, 300gr/m2, 400gr/m2, 450gr/m2) by conducting the "Standard Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method" and the "Standard Test Method for Static Puncture Strength of Geotextiles and Geotextile Related Products Using a 50-mm Probe". In this way the utilization of geotextiles in road construction can be evaluated.

Keywords:

Geotextile, Tensile strength, Static puncture strength, Texture,

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