wetability of biocompatible polymers can be improved by plasma surface modification. the purpose of this study was to surface modify an experimental poly (dimethylsiloxane) rubber (pdms) material in order to improve its wetability and biocompatibility. surface properties of the pdms were characterized using contact angles measurement for wetability analysis. samples of experimental silicone rub...

Confocal Laser Scanning Microscopy (CLSM) has gathered interesting new results regarding the microstructure of bitumina as part of a comprehensive study on bitumen and asphalt concrete. Compared to normal fluorescence microscopy, the CLSM technique has been proven to be the method of choice for bitumen. The main advantage is a much stronger fluorescence signal due to the higher intensity of the...

The objective of this research was to develop prediction models for complex shear modulus (G*) and phase angle (δ) bitumens modified with crumb rubber, styrene-butadiene styrene, polyphosphoric acid at low moderate temperatures. experiments consisted three different dosages each modifier added the original bitumen followed by measurement G* δ using dynamic rheometer (DSR) test in frequency swee...

The chemo-rheological properties of crumb rubber modified bitumen are always unstable due to the mutable and uncontrollable swelling-degradation degree in matrix. study aimed at exploring continuous swelling degradation behaviors (CRMB) considering influence size through monitoring dynamic viscosity changes CRMB binders. Moreover, synergistic effects on chemical rheological were investigated. r...

in this study, different contents of nano-silica, 2 wt.%, 4 wt.% and 6 wt.%, have been added to bitumen tomodify the physical, mechanical and rheological properties of warm mix asphalt (wma). wma iscontaining 2 wt.% of sasobit (mixture of long-chain hydrocarbons). various quality control tests have beencarried out to characterize the modified bitumen and wma. the rheological investigations show...

The fuel resistance property plays an important role in asphalts, but available standards for determining this characteristic are presently lacking. In the present work, a number of polymer modified bitumen with styrene-butadiene-styrene (SBS) polymer (4, 5, 6% SBS) and SBS/ sulfur modified bitumen with various percentages of sulfur (1.65, 3, 3.5% based on polymer content) were prepared. Each s...