Oruç, Şeref; Yılmaz, Bahadır; Sancak, Kemal

In this study, a novel boron-containing organic additive, which is completely original, was chemically synthesised in the laboratory condition and its performance features on the asphalt were assessed. The structural characterisation of the synthesised organic additive was investigated using nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry (TG) analysis methods. The morphologic structure, modification mechanism and thermal degradation behaviours of modified asphalt binders formed by adding the additive to the asphalt were determined by scanning electron microscopy (SEM), FT-IR and TG analysis. The physical and rheological properties were measured using dynamic shear rheometer (DSR), rolling thin film oven test (RTFOT), rotational viscometer (RV), pressure aging vessel (PAV), bending beam rheometer (BBR) and conventional binder experiments. Mechanical properties of mixtures prepared according to Marshall design were examined by the experiments of Marshall stability and flow, indirect tensile, moisture damage, indirect tensile strength, static creep, dynamic creep, indirect tensile fatigue, LCPC wheel tracking, and Nicholson stripping. The results indicate that the additive increased the asphalt’s consistence, rutting, aging resistance, flexibility, adhesion, loading spreading and fatigue life features and decreased temperature sensibility and cracking tendency at the low temperatures. Statistical analysis of the data obtained from experiments supports those findings, indicating that the best additive ratio to enhance the performance features of asphalt was 6%.

İncele

Oruç, Şeref; Yılmaz, Bahadır

In current times, many additives are used to improve the performance characteristics of asphalt. In this study, a new additive that contains boron, given the short name of cyclic borate ester (CBE), was chemically synthesised in laboratory conditions. It was added to the asphalt binder as 1%, 2%, 4% and 6% ratios of asphalt by weight, and modified asphalt samples were produced. The effects of CBE on the conventional properties of asphalt binder (penetration, softening point, ductility, flash point, Fraass breaking point) were examined using a dynamic shear rheometer, rotational viscosity, a rolling thin film oven, a pressure aging vessel and bending beam rheometer test methods. Results showed that the use of CBE additive increased the hardness, softening point, viscosity, flash-point value and rutting resistance of asphalt binder and decreased temperature sensitivity. CBE also enhanced elastic responses (increased complex shear modulus and decreased phase angle), aging resistance and low-temperature cracking resistance and did not change the cohesion property.

AtıfScopus25·WoS24·OpenAlex28

İncele

Oruç, Şeref; Yılmaz, Bahadır; Sancak, Kemal

In this study, four novel boron-containing additives were synthesised chemically in the laboratory. The modification was performed by adding the additives, respectively, into asphalt at a certain amount by weight at the same temperature and mixing conditions. The modification mechanism and microstructure of the blends were characterised by Fourier transform infrared spectrometer and scanning electron microscopy. The variation in modified samples in comparison to base asphalt was investigated by performing the penetration, softening point, dynamic shear rheometer, amplitude–frequency–temperature sweeps and rotational viscosity tests. It was observed that the additives increased the softening point, rutting resistance, elastic properties and viscosity of asphalt. The additive synthesised with triazole borate ester octanol-sulphuric acid catalysts gave the most enhancements, relative to base asphalt.

AtıfScopus20·WoS17·OpenAlex22

İncele