polymer application for the improvement and modification of the bitumen used in roads surfaces has expanded in recent decades. the roads engineers and constructors, therefore, have used the modified bitumen in asphalts helping in this way to increase roads and pavements service life and improving the durability of the roads and asphalts. the bitumen used in asphalt mixture constitutes only a lo...

Environment conservation and diminishing natural resources caused an increase in popularity of the application of renewable bio-origin resources for the construction of road pavement. Currently, there are known additions of bio-origin materials for bitumen modification. Such material is also used as a flux additive for bitumen or as a rejuvenator once working with reclaimed asphalt pavement (RA...

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...

Nowadays, utilisation of Nano-materials as one of the most recent methods of bitumen modification has attracted attention of many researchers. However, not enough research has been pursued on their mixing with bitumen, because of their dimensions and specific properties. In this study, the carbon Nano-tubes were mixed with bitumen using different mixers and some images were recorded employing a...

There is substantial evidence on the advantages of using crumb rubber in enhancing conventional bitumen properties, gaining environmental protection and boosting industrial-economical benefits. Thus, the use of this ingenious additive in bitumen modification through sustainable technology is highly advocated.The main objective of this research is to investigate the effects of different blending...

with respect to the physical and mechanical limited qualities of bitumen, it benefits from certain specificability in application and its life service. polymers as the most important modifiers of bitumen are applied to it in order to improve its functional efficiency. among various polymers, styrene-butadiene- styrene (sbs) is the best modifier of the bitumen. in this work, sbs polymer as one o...

due to performance grade  )pg) zonation of different parts in iran and poor properties of 60/70 penetration grade bitumens for pavement applications, suitable  polymer modifed  bitumen was  produced.  to  fulfll  this  purpose, different pmbs samples were produced using 60/70 penetration grade bitumen and  various  percentages  of vb  (20  and  25%), with  different  percentages  of  sbs calpre...

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...

modified bituminous materials can bring real benefits to highway maintenance/construction, in terms of better and longer lasting roads, and savings in total road life castings. this paper present the effect of there novel modifier as precipitated calcium carbonate (pcc) and two type of nanoclay on rheological properties of bitumen binder. various blends of modifier and bitumen were selected and...

In this investigation, rheological properties of three different polymer-modified bitumen compounds containing recycled polyethylene terephthalate (R-PET), crumb rubber (CR) and poly (styrene-butadiene-styrene) (SBS) are evaluated and compared. The modified samples were tested by a dynamic shear rheometer (DSR) where complex modulus (G*), phase angle (δ) and rutting resistance (G*/Sinδ) of spec...