Recycled asphalts were evaluated based on SHRP binder specification. DSR (Dynamic Shear Rheometer) and BBR (Bending Beam Rheometer) tests were carried out on samples of the recycled asphalts under three conditions: original binder, RTFOT (Rolling Thin Film Oven Test) residue and RTFOT+PAV (Pressurized Aging Vessel) residue. PG (Performance-Graded) classification was conducted. New straight asph...

The oxidized bitumen produced at the Ukrainian refinery was modified with maleic anhydride. process temperature proved to have most significant effect on modification. chemical interaction of anhydride components confirmed. At low temperatures (up 403 K) chemistry modification is another than carried out high temperatures. structures were established different (403, 423 and 443 using FTIR spect...

Bu çalışmada, biyokütlesel bir atık olan pirina’nın bitümün fiziksel ve mikroyapısal özellikleri üzerindeki etkisi araştırılmıştır. amaçla, B 160/220 penetrasyon sınıfı saf bitüme, ağırlıkça %5, %10, %15 %20 oranlarında pirina ilave edilerek modifiye bitümler elde edilmiştir. Saf bitümlerin penetrasyon, yumuşama noktası düktilite testleri ile belirlenerek sıcaklık hassasiyetleri de tespit Bağla...

The high-temperature rheological properties of emulsified asphalt mastics have a significant impact on the service performance cold recycled mixtures with emulsions. In this paper, dynamic shear (DSR) test and multiple stress creep recovery (MSCR) are carried out to analyze influence tunneling coal gangue powder (TCGP), portland cement (PC), limestone (LP), four kinds filler binder ratio (F/B) ...

To obtain road bitumen with improved temperature and fatigue resistance, polymers and/or rubbers could be added to it. A particularly suitable polymer for modification is styrene-butadiene-styrene (SBS) copolymer but limited information available about the ageing behaviour of modified binders. In this work, two neat bitumens, different penetration grades, SBS-modified containing SBS amounts, we...

One of the important factors of cracks on the asphalt pavements is bitumen aging that associated with the loss of volatile components and oxidation of asphalt binder. This paper is about effect of Styrene-Butadiene-Styrene (SBS) polymer on asphalt aging In order to decrease asphalt aging effects. For this purpose samples of base bitumen and SBS modified bitumen aged according to the rolling thi...

• The oxidative mechanisms in bitumen were studied after laboratory short- and long-term ageing. Three binders of varying crude source, distillation, performance wax presence investigated. 1 H NMR demonstrated slight changes the relative proton distribution upon EPR supported an increase organic carbon-centred radicals short-term TOF-SIMS revealed SO x -, (OH) -containing compounds because Unde...