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- W1567732084 abstract "There are two processes of adding Crumb Rubber Modifier (CRM) to Hot Mix Asphalt (HMA), i.e., the wet and the dry process; and different technologies are available for each process. In this study, Asphalt Rubber (AR) binders were prepared by combining CRM obtained from three sources and three grades of asphalt cement (AC-5, AC-10, and AC-20) typically used in Rhode Island using the wet process. Further, to investigate the effect of CRM amount and additives, AR binders were prepared with two or three percentages of CRM and three levels of additives, e.g., extender oil. Performance-related properties of AR binders were determined using test methods recommended by the Strategic Highway Research Program (SHRP). It was found that the addition of CRM generally raised the high temperature grade, and appears to make the resulting AR binders less temperature susceptible. Based on the results of the binder study and producer's practices, HMA specimens were prepared with two selected AR binders (Producer R and A CRMs) for dense graded and Modified Open Graded Friction Course (MOGFC) mixtures, respectively. Aggregates procured from four asphalt contractors in Rhode Island were used. In addition, gap graded HMA specimens were prepared with three percent CRM and control AC-20 binder with two typical aggregates in Rhode Island using the dry process. Marshall mix design was performed on all mixtures to determine Optimum Binder Content (OBC) and Marshall properties. Then, mechanical properties were evaluated for the mixtures with and without CRM. SUPERPAVE Level 1 mix design was also performed for dense graded, MOGFC, and gap graded mixtures with aggregates procured from Contractor C. Finally, Incremental Static Dynamic Creep Test (ISDCT) was performed on mixtures with and without CRM using Contractor C materials; and the performance of pavements with and without CRM was predicted using the computer program VESYS. It appears that the pavements with CRM in the surface layer may have less rutting damage than the ones with control mixtures." @default.
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- W1567732084 date "1995-12-15" @default.
- W1567732084 modified "2023-09-26" @default.
- W1567732084 title "FEASIBILITY OF CRUMB RUBBER USE FOR ASPHALT PAVEMENT CONSTRUCTION IN RHODE ISLAND" @default.
- W1567732084 hasPublicationYear "1995" @default.
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