OBJECTIVES Good wettability of maxillofacial prosthetic materials is important so that a lubricating layer is formed with supporting tissues thus reducing patient discomfort. The purpose of the study was to surface modify an experimental silicone rubber material in order to improve wettability. METHODS Samples of experimental silicone rubber were surface modified by first argon plasma treatme...

The aim of this study was to investigate the effects different anti-ageing compounds (AACs) on oxidative stability, rheological and mechanical properties bitumen. Modified bitumen samples containing six AAC combinations, with five Irganox acid (3,5-di-tert-butyl-4-hydoxyphenylpropionic acid), a hindered phenol polymer-based antioxidant, were fabricated aged under conditions using Rolling Thin F...

Crumb rubber (CR) derived from grinding of end-of-life tyres (ELTs) may be successfully used as a bitumen modifier or as a supplementary component in the production of bituminous mixtures employed for the construction and maintenance of road pavements. However, CRs deriving from different sources and production processes yield effects on performance of corresponding paving mixtures under traffi...

Atomic force microscopy (AFM) is capable to picture the topology of bitumen at a submicrometer level and optical spectroscopy can gather chemical information [1-3]. Here we combine AFM and Raman spectroscopy, which allows a better specification of the chemical origin of bitumen. AFM imaging was performed from the topology, following with Raman imaging from the same area correlating the chemical...

This study aims to characterise fatigue cracking of two types waste-derived (bio-oil and LDPE) bitumen. Modified Paris’ law Griffith criterion were proposed investigate crack propagation initiation the Results show that bio-oil delays LDPE accelerates initiation, bitumen itself dominates unaged The did not take effects in altering bitumen’s performance after pressure ageing vessel (PAV) ageing....

Waste utilization has gained more and more interest. In this study, crumb rubber and diatomite were used to modify asphalt binder and the short-term aging effects on the properties of modified asphalts were evaluated. Three kinds of modified asphalt were prepared; they are diatomite modified asphalt (DA), crumb rubber modified asphalt (RA), and diatomite and crumb rubber compound modified aspha...

Warm mix asphalt (WMA) has been gaining increasing popularity in recent years due to energy savings and environmental benefits. The mechanism of WMA is to use some additives or technologies to reduce the viscosity of bitumen and to modify the rheological behavior of bituminous binders, and thus improve the workability of the mixture at lower temperature. In this study a paraffin wax based addit...