Properties of recycled hot asphalt mixture added with mastic asphalt component

Abstract

The use of natural aggregates can be reduced by utilizing Reclaimed Asphalt Pavement (RAP). In field, there have been many simple recycling applications of RAP with addition of new asphalt and stone ash as road pavement on community housing areas. The objective of this experiment is to provide engineering properties of the mixture. Asphalt pen 60/70 was softened or rejuvenated with 11% SAE 10 engine oil, to obtain asphalt pen 180/200. The mixtures were produced by adding the RAP with 10% and 20% rock ash and soften asphalt, in hot mix process. The added asphalt content was varied by 2%, 2.5%, 3%, 3.5% and 4% by weight of the RAP, and compacted at 2x50 Marshall blows. The mixture of RAP with 10% stone ash at 3% added asphalt gave better performances compared to the mixture with 20% stone ash, in which the stability value was 3380.5 kg, flow 3.08 mm, Marshall Quotient of 1097.65 kg/mm, VIM 3.077%, VMA 18.95%, VFB 83.84%, Cantabro 9.02%, ITSM 5422 MPa, creep slope 0.267, and fatigue with load of 700; 900; 1100 KPa failed at 6101; 1471; 831 load repetitions. The mixture well meet the specification for typical mixtures for low to medium trafficked roads.