Alper SEYMEN, Erol İSKENDER, Atakan AKSOY

ASFALT KAPLAMALARDA TABAKA KALINLIĞININ ETKİSİNİN ARAŞTIRILMASI

Bu çalışmada, arazi koşullarında gerçek silindir sıkıştırması ile üretilerek yaşlanmış kaplamaların kalınlıklarının deformasyon, çatlama direnci ve su hasarı direnci üzerindeki etkileri araştırılmıştır. Kullanılan örnekler, 40mm ile 90mm arasında değişen kalınlıklarda, yol kaplamasından kesilerek alınmıştır. Hamburg tekerlek izi deneyi, deformasyon kontrollü kiriş eğilme deneyi ve tekrarlı-yük kontrollü kiriş eğilme deneyi kaplama örneklerine yapılmıştır. Kaplama özelliklerinin kalınlık değişiminden önemli oranda etkilendiği görülmüştür. Kaplama kalınlığının artması ile deformasyon miktarı da artmış ancak Hamburg tekerlek izi deneyinden elde edilen deformasyon ve su hasarı direnci ile kaplama kalınlığı arasında yüksek korelasyon oluşmamıştır. Hamburg tekerlek izi deneyinde 70mm’den daha kalın örneklerde soyulma büküm noktaları oluşmuştur. Deformasyon kontrollü ve tekrarlı yük kontrollü kiriş eğilme deneylerinde, kaplama kalınlığının artması ile kırılmaya neden olan yük ve aynı miktarda deformasyonun oluşması için gereken yük te artmıştır. Regresyon analizlerinde, kırılma yükü-kaplama kalınlığı ve deformasyon-kaplama kalınlığı arasındaki ilgileşimde sırasıyla R2=0.9734 ve R2=0.9859 korelasyon katsayıları oluşmuştur.

Anahtar Kelimeler:

Asfalt Kaplama, Arazi Performansı, Kiriş Örnek, Kiriş Eğilme Deneyi, Tekerlek İzi Deneyi

INVESTIGATION OF THE EFFECT OF COURSE THICKNESS IN ASPHALT PAVEMENT

In this study, the effect of asphalt pavement thickness on deformation, cracking and water damage resistances was investigated on aged pavement produced by real roller compaction under field conditions. The samples used were cut from the pavement in thicknesses ranging from 40mm to 90mm. Hamburg wheel tracking test (HWTT), deformation controlled beam bending test and repeated-load controlled beam bending test were performed on pavement samples. It has been observed that the pavement properties are significantly affected by the thickness change. With the increasing thickness of the pavement, the amount of deformation also increased, but there was no high correlation between the deformation and water damage resistance obtained from the HWTT and the pavement thickness. In the HWTT, stripping behaviors were observed in samples thicker than 70mm. In deformation-controlled and repeated load-controlled beam bending tests, the load causing the fracture and the load required for the formation of the same amount of deformation increased with the increase of the pavement thickness. R2=0.9734 and R2=0.9859 correlation coefficients, respectively, were formed in the correlation between fracture load-pavement thickness and deformation-pavement thickness.

Keywords:

Asphalt Pavement, In-situ Performance, Beam Sample, Beam Bending Test, Wheel Tracking Test,

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