Investigation of Cold Recycling of Bituminous Surface Treatment with Foam Bitumen

Yıl 2022, , 1388 - 1399, 28.12.2022

Kemal Muhammet Erten , Serdal Terzi , Hüseyin Akbulut

https://doi.org/10.35414/akufemubid.1072221

Öz

The course of turned of bituminous pavement layers into hot mix asphalt (HMA) layers has been increasing day by day all over the world. Bituminous surface treatment that contains consirable amount of aggregate and bitumen, is an important source of recycling that offers a great amount of pavement materials intead of virgin material usage on pavement consruction.
In the study, it was aimed to investigate the usability of bituminous surface layer treatment in the base layers of the HMA roads by mixing with foam bitumen and active filler materials in order to eliminate the potential performance degradation that will be encountered when it is recycled due to the low bitumen percentage compared to hot mix asphalt and the wear of the aggregate due to climatic conditions and traffic loads over time.
The study conducted that intends to technically evaluate the cold recycling of bituminous surface treatment of roads with foam bitumen and active filler materials; for 70/100 bitumen grade, 5 different bitumen mixes were prepared and ideal bitumen percentage was investigated for this bitumen grade. The effect of bitumen percentage on mixture performance was evaluated with 50/70-100/150-160/220 bitumen grades and mixtures were prepared in single bitumen ratio (2.5%). It was investigated that active fillers will give suitable results for foam bituminous mixtures by preparing mixtures for three different active fillers; cement, hydrated lime and fly ash. To evaluate all these productions, ITS, unconfined compressive strenght, triaxial resilient modulus and asphalt permanent deformation tests were performed.
The results obtained showed that production made using 2% foam bitumen and 1% was found suitable for moisture sensitivity and structural stability. Recycling of bituminous surface treatment using foam bitumen and cement is an environmentally and economically beneficial method by reducing both waste and raw material consumption.

Anahtar Kelimeler

Bituminous surface treatment, Foam bitumen, Indrect tensile strenght, Unconfined compressive strenght, Resilient Modulus

Destekleyen Kurum

Süleyman Demirel University, General Directorate of highways

Proje Numarası

4939-D1-17, KGM-ARGE/2017-1

Teşekkür

This study was supported by SDU (Süleyman Demirel University) scientific research project 4939-D1-17 and KGM-ARGE/2017-1 KGM (General Directorate of highways) project.

Sathi Kaplamalı Yolların Köpük Bitümle Soğuk Geri Kazanımının Araştırılması

Öz

Tüm dünyada sathi kaplamalı yolların BSK (bitümlü sıcak karışım) yollara dönüştürülme trendi günden güne artmaktadır. Ömrünü tamamlamış sathi kaplamalar barındırdığı agrega ve bitüm nedeniyle geri dönüşüm için önemli bir kaynaktır.
Çalışmada, sathi kaplamaların bitümlü sıcak karışımlara göre düşük bitüm yüzdesiyle üretilmesi ve içerisinde ki agreganın zaman içerisinde iklimsel şartlar ve trafik yükleri nedeniyle yıpranması nedeniyle geri kazanıldığında karşılaşılacak muhtemel performans düşüklüğünün giderilmesi için köpük bitüm ve aktif filler ürünlerle karıştırılarak, BSK yolların temel tabakalarında kullanılabilirliği araştırılmaya çalışılmıştır.
Geri kazanılmış sathi kaplamaların köpük bitüm ve aktif filler malzemelerle soğuk geri kazanımını teknik açıdan değerlendirebilmek için yapılan bu çalışmada; 70/100 bitüm sınıfı için 5 farklı bitüm yüzdesinde karışımlar hazırlanmış ve bu bitüm sınıfı için ideal bitüm yüzdesi araştırılmıştır. 50/70-100/150-160/220 bitüm sınıfları ile tek bitüm yüzdesinde (2.5%) hazırlanan karışımlarla da bitüm sınıfının karışım performansına etkisi değerlendirilmiştir. Çimento, sönmüş kireç ve uçucu kül olmak üzere üç farklı aktif filler için karışımlar hazırlanarak hangi aktif fillerin köpük bitümlü karışımlar için uygun sonuç vereceği araştırılmıştır. Tüm bu üretimleri değerlendirebilmek amacıyla dolaylı çekme modülü, serbest basınç dayanımı, üç eksenli esneklik modülü, asfalt kalıcı deformasyon testleri gerçekleştirilmiştir.
Elde edilen sonuçlar göstermiştir ki 2% civarında köpük bitüm ve 1% çimento kullanılarak yapılan üretim nem hassasiyeti açısından ve yapısal stabilite açısından uygun olduğunu göstermiştir. Sathi kaplamaların köpük bitüm ve çimento kullanılarak geri kazanılması, hem atık hem de hammadde tüketiminin azaltılması ile çevresel ve ekonomik olarak fayda sağlayacak bir yöntemdir.

Anahtar Kelimeler

Sathi Kaplama, Köpük bitüm, Serbest basınç dayanımı, Dolaylı çekme dayanımı, Esneklik Modülü

Proje Numarası

4939-D1-17, KGM-ARGE/2017-1

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• İnternet kaynakları
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