Abstract
Reuse of existing deteriorated bituminous pavement material in construction and maintenance of flexible pavement is called recycling of bituminous pavement. Removed and reprocessed deteriorated pavement material which is recycled is termed as Reclaimed asphalt pavement (RAP). In India during construction of flexible pavement different types of bituminous layers are in practice depending upon CBR of sub-grade and traffic count i.e. CVPD of the road stretch. Depending upon types of bituminous layer i.e. PC Seal Coat, Bituminous Macadam(BM), Dense grade bituminous Macadam (DBM), Semi Dense Bituminous Concrete (SDBC) or Bituminous Concrete(BC) Reclaimed Asphalt Pavement can classified in different groups These classified RAP groups materials will have different characteristics i.e. Rap aggregates and Recovered bitumen of different group of RAP will have different characteristics. In this study characterization of RAP limited to Aggregate Impact Value (AIV) and Aggregate Abrasion Value (AAV)of RAP aggregates of RAP classified in different groups. Results of this study will be compared to standard value of AIV and AAV required for bituminous construction to predict that RAP aggregates are suitable or not for use in bituminous mixes.
Highlights
Reuse of existing deteriorated bituminous pavement material in construction and maintenance of flexible pavement is called recycling of bituminous pavement
This study deals with finding out two basic characteristics or properties of RAP aggregates i.e. Aggregate Impact Value (AIV) and Aggregate abrasion Value (AAV) by conducting laboratory experiments on aggregates obtained from different categories of reclaimed asphalt pavements (RAP) classified on the basis of origin and sources of RAP
“Group BS” RAP: These are RAP samples collected from the deteriorated pavement sites where initially bituminous layer is Semi Dense Bituminous Concrete (SDBC) over layer of Bituminous Macadam supported by a granular base
Summary
Mobility of people and goods has been a primitive and everlasting need through the centuries. Since natural resources of aggregates and bitumen binders are limited these required to preserve Another problem of periodic resurfacing or renewal maintenance raised the road elevation which causes vertical clearance, drainage and plinth level related alerts. To overcome all these difficulties recycling of bituminous pavement introduced. Production of asphalt can incorporate reclaimed materials from the deconstruction of road surfaces This aids in reducing production costs and saves natural resources, bitumen and aggregates. It becomes first priority to develop guidelines and standards pertaining use of recycled or reclaimed asphalt pavement (RAP). DB layer of Dense Bituminous Macadam exist at the road from where sample is collected
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