SU HASARI ÖNLEYİCİ KATKILARIN TEKERLEK İZİ DİRENCİNE ETKİSİNİN ARAŞTIRILMASI

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.

Anahtar Kelimeler:

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

INVESTIGATION OF EFFECT OF ANTI STRIPPING AGENTS ON RUTTING RESISTANCE

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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Abo-Qudais, S. (2007). The Effects of Damage Evaluation Techniques on the Prediction of
Environmental Damage in Asphalt Mixtures, Building and Environment 42, 288–296. Akzo Nobel. (2011). Safety data sheet. Wetfix BE. AU/EN.
Aren Cleven, M. (2000). Investigation of the Properties of Carbon Fiber Modified Asphalt
Mixtures, Master of Science in Civil Engineering, Michigan Technological Universiy. Brown, S.F.(1995). Practical Test Procedures for Mechanical Properties of Bituminous
Materials, Proc. Instn. Civ. Engrs Transp., 111, 289-297. Fromm, HJ. (1974). Mechanism of asphalt stripping from aggregate surfaces. AAPT, 43, –223.
Fwa, T.F., Ong, B.K. (1994). Effect of moisture in aggregates on performance of asphalt.
Transport Res Rec., 1454, 28–35.
Görkem, C., Şengöz, B. (2009). Predicting stripping and moisture induced damage of asphalt concrete prepared with polymer modified bitumen and hydrated lime Construction and Building Materials, 23, 2227–2236.
Hicks, R.G. (1991) Moisture damage in asphalt concrete. NCHRP Synthesis of Highway
Practices No. 175, Transportation Research Board – National Research Council, Washington, DC. Huang, S., Robertson, R.E., Branthaver, J.F., Petersen, J.C. (2005). Impact of lime modification of asphalt and freeze–thaw cycling on the asphalt–aggregate interaction and moisture resistance damage. J Mater Civil Eng, 17, 6, 711–8.
İskender, E. (2008). Koşullandırma Sistemlerinin Geleneksel Ve Modifiye Asfalt Karışımlar
Üzerindeki Etkilerinin Araştırılması, Karadeniz Teknik Üniversitesi, Fen Bilimleri Enstitüsü, Doktora tezi, 166 s., Trabzon. Kandal, P.S., Lubold, C.W., Roberts, F.L. (1989). Water damage to asphalt overlays: case histories. AAPT, 58, 40–76.
Kennedy, T.W., Ping, W.V. (1991). Evaluation of effectiveness of antistripping additives in protecting asphalt mixtures from moisture damage. J Assoc Asphalt Paving Technol 1991, –263.
Kok, B.V. ve Yılmaz, M. (2009). The effects of using lime and styrene–butadiene–styrene on moisture sensitivity resistance of hot mix asphalt, Construction and Building Materials 23, –2006.
Lee, K.W. (1982). Prediction and Evaluation of Moisture Effects on Asphalt Concrete
Mixtures in Pavement Systems, Doctorate thesis, Texas University, Austin. Little, D.N., Epps, J.A. (2001). The benefits of hydrated lime in hot mix asphalt. National Lime Association.
McCann, M., Sebaaly, P.E. (2003) Evaluation of moisture sensitivity and performance of lime in hot-mix asphalt. Transport Res Rec., 1832, 9–16.
McGennis, R.B., Machemehl, R.B. ve Kennedy, T.W. (1981). Stripping and Moisture
Damage in Asphalt Mixtures, Research Report 253-1, Centre for Transportation Research, Bureau of Engineering Research, The University of Texas, Austin. Şengöz, B. ve Ağar, E. (2007). Effect of asphalt film thickness on the moisture sensitivity characteristics of hot-mix asphalt, Building and Environment 42, 3621–3628.
Stuart, K.D. (1990). Moisture damage in asphalt mixtures: a state of art report. Research
Development and Technology, Turner-Fairbank Highway Research Center. Taylor, M.A., Khosla, N.P. (1983). Stripping of Asphalt Pavements: State of the Art,
Transportation Research Record 911, TRB, National Research Council, Washington (DC), –8. Terrel, RL. ve Al-Swailmi, S.(1993). The Role of Pessimum Voids Concept in Understanding
Moisture Damage to Asphalt Concrete Mixtures, Annual Meeting of the TRB. Witczak, M. (2005). Simple Performance Tests: Summary of Recommended Methods and Database, NCHRP Report 547, Transportatıon Research Board, Washıngton, D.C.