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...

We evaluated the effect of polyelectrolyte complexes (PEC) with varying balance of charges on the flocculation of precipitated calcium carbonate (PCC) particles. PECs composed of polyacrylamides carrying opposite charges (A-PAM and C-PAM) were investigated in terms of PCC floc shear resistance and re-flocculation effects. Light transmission was used in real time to monitor the dynamics of flocc...

Electric toothbrushes were evaluated using a model of plaque removal by fluid shear forces. Sucrose supplementation during plaque development did not affect the removal of bacteria from biofilm exposed to low-energy shear but did increase their resistance to high-energy shear. The toothbrush supplying high-energy shear forces removed significantly more viable bacteria.

This research work focuses on investigating the fatigue and thermal cracking resistance of asphalt binder with different percentages styrene-butadiene-styrene (SBS) utilizing rheological testing methods. The laboratory experimental program includes Dynamic Shear Rheometer (DSR) test at intermediate temperature for Bending Beam (BBR) low to assess cracking. polymer-modified binders were prepared...

This study explores the effects of polyphosphoric acid (PPA) on rheological performance styrene butadiene (SBS) and crumb rubber (CR) modified asphalt binders at high temperatures. Four PPA concentrations were selected: 0.4%, 0.8%, 1.2%, 1.6% by weight virgin asphalt, one SBS binder with 5% was used as a reference binder. Laboratory tests performed to simulate short-term long-term aging. Temper...

With the rapid growth of traffic demands, use liquid chemical material instead traditional modifier to prepare high-performance modified asphalt demonstrates dual values in environmental protection and performance improvement pavement. The objective this study is assess efficiency reveal modification mechanism using a developed polyurethane precursor–based reactive (PRM) preparation precursor–m...

In this research, ZnO nanoparticles modified with imidazole in O-xylene solution and characterized with Fourier transform infrared FTIR spectroscopy. Then, polyaniline-ZnO unmodified and imidazole modified nanocomposites were synthesized via in-situ emulsion polymerization method. The synthesized nanocomposites were characterized by FTIR and scanning electron microscopy SEM. The anti-corrosion ...

AIM The present study was conducted to determine and compare the shear bond strengths of Conventional glass ionomer; Resin-modified glass ionomer; Polyacid-modified composite and Composite Resin, and to assess and determine the mode of failure (adhesive, cohesive, mixed). MATERIALS AND METHODS Occlusal dentin of 40 extracted human teeth were randomly divided into four groups of ten teeth, eac...

The buckling behavior of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) plates resting on Winkler-Pasternak elastic foundations under in-plane loads for various temperatures is investigated using element-free Galerkin (EFG) method based on first-order shear deformation theory (FSDT). The modified shear correction factor is used based on energy equivalence principle. Carbon ...

Recently, bitumen pavements have been widely used for road paving. Various scholars modified in paving to improve pavement performance, thus increasing the service life. In this study, Sasobit, XT-W3, and Evotherm were selected as warm-mix various investigations including conventional Brookfield rotational viscosity, dynamic shear rheology, Marshall stability, high-temperature rutting, water lo...