Alüminyum Oksit ve Silikon Dioksit ile Modifiye Edilmiş Bitümün Rijitlik Modülünün Ampirik Yöntemle İncelenmesi

Öz

Bu çalışmada, bitüm ile alüminyum oksit ve silikon dioksit yüksek devirli karıştırıcı yardımıyla karıştırılarak modifikasyon sağlanmıştır.  Bu modifikasyonun sonucunda bitüm performansı standart bitüm deneyleri ile incelenmiştir. Ayrıca ampirik yöntemler kullanılarak rijitlik modülü hesaplanmıştır. Günümüzde nanotüp modifikasyonu yaygın olarak kullanılan bir metot haline gelmiştir. Nanotüplerin yüksek yüzey alanına sahip olmasından dolayı nano boyutta bitüm performansının iyileştirildiği bilinmektedir. Bitüm modifikasyonu ağırlıkça %3, %5 alüminyum oksit ve %0.3 ve %0.5 oranlarında silikon dioksit ile modifiye edilmiştir çünkü silikon dioksitin yüzey alanı ve özgül ağırlığı fazladır. Bitüm karakteristikleri bitüm testleri (dönel viskozimetre, penetrasyon, yumuşama noktası, düktilite, elastik geri dönme ve penetrasyon indeksi) ile belirlenmiştir. Çalışmada bitüm performans derecelendirme (Performance Grade – PG) sistemine göre sınıflandırılmış ve PG 64-22 olarak kullanılmıştır. Ayrıca ampirik yöntemle rijitlik modülü hesaplanmıştır. Sonuçta, 3% Al₂O₃ ve 0.3% SiO₂ modifiye edilmiş bitüm diğer modifikasyonlara göre daha iyi sonuç vermiştir.

Anahtar Kelimeler

• Ampirik modelleme,Rijitlik modülü,Plastik rijitlik,Bitüm performansı,Nanotüp modifikasyonu

Investigating Aluminum Oxide and Silicon Dioxide Modified Bitumen Stiffness Modulus with Empirical Method

Abstract

In this study, bitumen was modified with aluminum oxide and silicon dioxide using high shear mixer. As a result of this modification, bitumen performance was investigated with standard test methods. Besides, stiffness modulus and plastic stiffness of bitumen was calculated using empirical methods. Nowadays, nanotubes were used for modification of bitumen, commonly. It is known that, nanotubes can improve the bitumen performance at nano level because of having high specific surface area. Bitumen modification was conducted with aluminum oxide at 3%, 5% and silicon dioxide at 0.3%, 0.5% by weight of bitumen because silicon dioxide has high specific surface area and specific gravity. Bitumen characteristics were determined by bitumen tests (rotational viscometer, penetration, softening point, ductility, elastic recovery and penetration index). In this study, bitumen performance grading (PG) system was used and bitumen was used as PG 64-22. In addition, stiffness modulus and plastic stiffness of bitumen was calculated with empirical methods. As a result, 3% Al₂O₃ and 0.3% SiO₂ modified bitumen has the best performance according to the modification and base bitumen.

Keywords

• Empirical modeling,Stiffness modulus,Plastic stiffness,Bitumen performance,Nanotube modification

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