Nanosilika Modifiyeli Bağlayıcıların Tekerlek İzi Direnci ve Sıcaklık Hassasiyetlerinin Belirlenmesi

Öz

Bu çalışmada, Nanosilika (NS) katkısının bitümlü bağlayıcıların tekerlek izi ve sıcaklık hassasiyetine olan etkisi değerlendirilmiştir. Bu kapsamda saf ve 3 farklı orandaki (%2, %4 ve %6) nanosilika modifiyeli bağlayıcılar üzerine penetrasyon, yumuşama noktası, viskozite ve çoklu gerilmeli sünme geri dönme (MSCR) deneyi uygulanmıştır. Saf ve NS modifiyeli bağlayıcıların sıcaklık hassasiyetini belirlemek için geleneksel deney sonuçlarından yararlanılarak penetrasyon indeksi (PI) ve penetrasyon-viskozite sayısı (PVN) belirlenmiştir. Elde edilen sonuçlara göre, saf bağlayıcının nanosilika ile modifiye edilmesiyle bağlayıcının kıvamında azalma ve viskozitesinde artış sağlanmıştır. Bu sayede sıcaklık hassasiyeti daha düşük modifiye bağlayıcılar elde edilmiştir. Ayrıca MSCR deney sonuçlarına göre nanosilika modifiyesinin bütün sıcaklıklarda daha düşük Jnr değerleri vererek bağlayıcının tekerlek izi parametresini geliştirdiği daha ağır taşıt trafiklerine cevap verebileceği ve yüksek servis sıcaklıklarında kullanılabileceği belirlenmiştir.

Anahtar Kelimeler

• Nanosilika
• modifikasyon
• sıcaklık hassasiyeti
• tekerlek izi

Kaynakça

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