Performance Grade Bitumen
Bitumen has been used for thousands of years and its importance as a valued engineering material continues to increase. The interest in the modification of bitumen using polymers, whether virgin, scrap or polymer blends, is intense. The last two decades, in particular, have seen an increase in the number of academic groups studying polymer-modified bitumen and correspondingly the peer-reviewed literature in the field has increased. Initially, studies on polymer modified bitumen focused more on engineering and empirical measurements, e.g. ageing and softening point. However, in recent years a plethora of techniques have been employed in the study of the effect of the addition of polymers on a range of bitumen properties, polymer_bitumen morphology and polymer_bitumen interactions.
Pavements designed and constructed for heavy-duty traffic and extreme weather conditions require specially designed engineered Bitumen Grades. By changing the characteristics of normal bitumen with the addition of a polymer, either they are of elastomeric nature or elastomeric, we succeed to obtain bitumen that allows the mixture to be more cohesive, with much more strength and significant higher resistance to parameters like fatigue and permanent deformations for road pavements.
Polymer Modified Bitumen (PMB) : Performance Grade Bitumen
Polymer Modified Bitumen (PMB) is one of the specially designed and engineered bitumen grades that are used in making pavement, roads for heavy duty traffic and home roofing solutions to withstand extreme weather conditions. PMB is a normal bitumen with the added polymer, which gives it extra strength, high cohesiveness and resistance to fatigue, stripping and deformations, making it a favorable material for infrastructure. When a polymer is added to regular bitumen, it becomes more elastomeric, which provides it with additional elasticity. The polymer that is added is Styrene Butadiene Styrene (SBS), which acts as a binder modification agent. The primary objective of SBS polymer modified bitumen is to provide extra life to pavement, roads and construction designs. Some of the qualities exhibited by PMB are:
Higher Rigidity : Performance Grade Bitumen
Increased resistance to deformation | Increased resistance to cracks and stripping | Better water resistance properties High durability | Advantage of using polymer modified bitumen:
Performance Grade Bitumen
PUB-LTD guaranty the quality of cutback MC-250 with arrangement of international inspector. Checking quality and quantity of the bitumen on each shipment during the loading to vessel. With controlling the production by QC team via batch test report before shipping. PUB-LTD guaranty the quality to meet with ASTM/EN15322:2009
Stronger road with increased marshall stability value and greater Rigidity. better resistant towards rainwater and water stagnation. no stripping and no potholes. Better resistance to permanent deformation reduction in pores in aggregate and hence less rutting and raveling. Much higher durability
Common Types of Polymer Modified Bitumen : Performance Grade Bitumen
The following table lists some common asphalt cement and HMA modifiers and their general purpose/use.