Technical Investigation of the Usability for Foamed Bitumen Stabilized Materials in Asphalt Pavements
JOURNAL OF ENGINEERING RESEARCH, ss.1-15, 2022 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2022
- Doi Numarası: 10.36909/jer.18011
- Dergi Adı: JOURNAL OF ENGINEERING RESEARCH
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Arab World Research Source, Directory of Open Access Journals
- Sayfa Sayıları: ss.1-15
- Süleyman Demirel Üniversitesi Adresli: Evet
Özet
Asphalt recycling efforts are increasing in order to reduce the effects of high energy and raw
material consumption in the asphalt sector. One of the most common methods for using old
asphalt material, which still retains some value, is recycling with foam bitumen.
In practice, for the preparation and evaluation of cold mixes produced using foam bitumen, ITS
(Indirect Tensile Strength) and MR (Resilient Modulus) methods are generally used. Among
these methods, ITS is mostly applied for the evaluation of the materials optimum percentages
values and MR test is also used for the evaluation of mixture performance.
In the experimental study, firstly for the cold mixes prepared with foam bitumen, optimum foam
bitumen values of the production series were determined by ITS test. Then, reproductions were
made for these optimum values and resilient modulus values were determined. It was found that
the ITS and MR values were significantly affected by the material gradation and this showed
the opposite tendency for the materials with the same gradation. The type of active filler was
effective the same as the values of the mixtures on ITS and MR. Especially, the MR results
were affected by the bitumen grade. As a result of the study, evaluation limit values; 225 kPa
for ITSDRY value, 150 kPa for ITSWET value and 70% for TSR, 400 MPa resilient modulus value
and 0.21 layer coefficient value are recommended for FBSM (Foam Bitumen Stabilized
Material).