Recycled Asphalt Pavement Specification

Asphalt pavement thickness and mix design while there are an infinite number of questions that can be asked we compiled a list of those questions that have been directed to us the most.

Recycled asphalt pavement specification.

Previous laboratory testing research reports were compared. Crushed concrete or other non hazardous recycled materials processed recycled asphalt pavements bottom ash foundry slag glass and recycled crumb rubber fly ash. Embankment broken portland cement concrete and concrete rubble reduced to specification size reclaimed asphalt pavement project specific as blended or alternating layers. The engineering design of.

The united states federal highway association fha notes these underlying materials are created when asphalt pavements are removed for various activities including. What is recycled asphalt. Cold processed recycled paving material for use as aggregate base course statewide use. Fractionated rap is crushed and sized reclaimed asphalt pavement that has been separated into its constituent aggregate sizes.

3 although most of the produced rap is recycled a large portion of it is wasted or down graded when used in landfills embankment or base layers. Speight phd dsc in asphalt materials science and technology 2016. These faqs are categorized into subject areas listed in the contents dropdown box below. Developing specifications for using recycled asphalt pavement as base subbase or general fill materials phase ii is a complete comprehensive report 11.

Recycled asphalt or reclaimed asphalt pavement rap is reprocessed pavement containing asphalt and aggregates. Common types of flexible pavement include hot mix asphalt hma rubberized hot mix asphalt gap graded rhma g and open graded friction course ogfc. Florida uses a stiffness strength value of limerock bearing ratio lbr that is similar to a california bearing ratio. Amount of recycled asphalt has been incorporated in mixes.

Today asphalt pavement is america s most recycled material with more than 70 million metric tons of asphalt paving material is recycled each year. Using rap material has well recognized financial and environmental benefits. If reclaimed asphalt pavement is incorporated into the mix it is usually mixed in the laboratory until thoroughly heated and blended with the new aggregate. Rubberized hot mix asphalt open graded rhma o and rhma o high binder rhma o hb.

There are also two types of rubberized ogfc mixes. Soil stabilization may consist of recycled products meeting general stabilizer requirements concrete rubble portland cement. However the mix plant the degree of mixing and the transfer of heat from the new aggregate to the reclaimed material are functions of. Txdot promotes using rap in many pavement management strategies.

Asphalt pavement has been america s most recycled material for a long time.