SU HASARI ÖNLEYİCİ KATKILARIN TEKERLEK İZİ DİRENCİNE ETKİSİNİN ARAŞTIRILMASI

Abstract

Su hasarı ve kalıcı deformasyon, sıcak karışım asfalt kaplamalarda başlıca hasar biçimleridir. Laboratuarda, asfalt karışımlara çeşitli çevresel hasar koşullama sistemleri uygulanabilmektedir. Bu şekilde, bir performans problemi belirli yönleri ile araştırılabilmektedir. Ancak uygulama koşullarında farklı problemlerin birlikte gelişiyor olması, sorunların değerlendirilmesini zorlaştırmaktadır. Sıcak karışım asfaltların su hasarı duyarlılığı kaplamanın hasarında önemlidir. Su hasarından kaynaklanan deformasyonu kontrol etmek için su hasarı (soyulma) önleyici katkıların kullanımı öne çıkmaktadır. Bu çalışmanın amacı, asfalt kaplamalarda soyulma önleyici katkı olan yağ asidi türevli amin katkısının tekerlek izi problemi üzerindeki etkisinin orta ve yüksek sıcaklıkta araştırılmasıdır. Tekerlek izi direncini belirlemek için tekrarlı yük sünme deneyi kullanılmıştır. Kontrol ve amin modifiye karışım örnekleri iki gruba ayrılarak bir gruba suya dayalı koşullama uygulanmıştır. Koşulsuz ve koşullu örnekler 20oC ve 40oC sıcaklıkta test edilmiştir. Her iki sıcaklıkta da amin katkısı karışımın tekerlek izi direncini arttırdı. Seçilen koşullama sisteminin karışımların performansı üzerinde gözlemlenebilir hasar seviyesi oluşturabildiği görülmüştür.

Keywords

• Su hasarı, tekerlek izi, tekrarlı sünme deneyi, koşullama sistemleri, yağ asidi türevli amin

INVESTIGATION OF EFFECT OF ANTI STRIPPING AGENTS ON RUTTING RESISTANCE

Abstract

Rutting and moisture damage are mainly two important distress mechanisms for asphalt mixtures. Various environmental conditioning systems can be exposed to asphalt mixtures in laboratory. In this way, a distress performance problem can be investigated with definite aspects. Nevertheless in the field conditions evaluation of a selected problem only is difficult because of the fact that such pavement problems have been being damaged together. Water sensitivity of hot mix asphalts is important in pavement distress process. Using of anti stripping agents becomes prominent for controlling deformation based on moisture. The aim of this study is to investigate the effects on permanent deformation of fatty amine anti-stripping additive in asphalt mixtures at moderate and high temperatures. Repeated creep test was used for rutting. Control samples and amine modified mixtures were divided into two groups and moisture conditioning was applied to in one group samples. Samples were tested at 20oC and 40oC test temperatures. Amine anti-stripping agent improved rutting resistance at both temperatures. It was differentiated that selected moisture conditioning methods can reveal observable level of damage on performance of mixtures.

Keywords

• Water damage, rutting, repeated creep test, conditioning systems, fatty amine

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