Optimising water content in cold recycled foamed asphalt mixtures
| Autor: | Wangyu Ma, Nam Tran, Randy C West, Nathan Moore |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
050210 logistics & transportation
Aggregate (composite) Waste management 05 social sciences Mixing (process engineering) Compaction 010501 environmental sciences Proctor compaction test Dispersion (geology) 01 natural sciences Asphalt 0502 economics and business Lubrication Environmental science Water content 0105 earth and related environmental sciences Civil and Structural Engineering |
| Zdroj: | Road Materials and Pavement Design. 18:58-78 |
| ISSN: | 2164-7402 1468-0629 |
| DOI: | 10.1080/14680629.2017.1389088 |
| Popis: | During cold recycling, water is added to facilitate the dispersion of foamed asphalt in the mixture and to achieve uniform mixing and help compaction by providing sufficient lubrication. Too little water may cause difficulty in workability and compaction of the mixture, but too much water may extend the curing time and reduce density and strength. Therefore, the optimum water content (OWC) was considered as one of the most important factors in mix design procedures for cold recycling. Currently, mix design procedures for cold recycled foamed asphalt mixtures suggest adding water to the mixture at an optimum content to facilitate mixing and compaction. However, there is no standard method for determining the optimum total water content (OTWC) for cold recycling mixtures. Several empirical relationships were developed to determine the OTWC based on modified Proctor test results for Reclaimed Asphalt Pavement (RAP)/aggregate. However, the compaction effort in the modified Proctor test for RAP/aggregate may n... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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