STUDY ON WARM MIX - RECYCLED ASPHALT UTILIZING BOTH FORMING TECHNIQUES AND CHEMICAL ADDITIVES

This paper presents the utilization of both forming techniques and chemical additives for warm mix - recycled asphalt (WMRA). The production of recycled asphalt mixtures in Japan is about 76% occupied although the warm mix asphalt (WMA) using forming techniques or chemical additives is only 0.3% occupied. The main reasons of few WMA production are both the less cost effectiveness compared with conventional hot mix asphalt and its quality issues. As countermeasure, the forming technique for WMA is fully expected for saving costs, however it is well-known that the mixture quality is strongly dependent on the proportion ratio of recycled aggregates. In this study, the authors investigated a WMRA utilizing both forming techniques and chemical additives. According to the testing results of laboratory test and trial production, the WMRA using high recycled aggregates proportions of 60% shows the reduction of the production temperatures of 30℃ and improve workability. The compaction characteristics of the WMRA mixtures at lower temperatures also show the good performance as same as conventional recycled asphalt using same aggregate proportion.

Language

  • English
  • Japanese

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Filing Info

  • Accession Number: 01767187
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Feb 1 2021 3:56PM