A state-of-the-art review of Natural bitumen in pavement: Underlining challenges and the way forward

The demand for alternative bitumen which could fully/partially replace Petroleum sourced pavement construction is globally increasing. increase in can be associated with several factors: depletion crude oil resources, advances refining processes, increased highway infrastructure, and regional transportation-environmental policies. Since the production of consumes energy generates emissions, there an effort to decrease harmful emissions has inspired researchers look so-called "green alternatives". Natural considered a green as it mixture mineral matter present naturally on earth, mainly if transported easily site. This paper reviews state-of-the-art information using from laboratory field perspectives. Physico-chemical properties, rheological properties behaviour asphalts pavements containing were assessed. Many road authorities would hesitate utilise applications due lack available data, knowledge systematic research study. To best authors’ knowledge, no comprehensive literature review article bitumen. Thus, presented aims comprehensively resources their types, application constructions, reported performances. At end paper, future challenges, recommendations methodological framework proposed.