Thermal Resistant Stone Mastic Asphalt Surface and Its Antirutting Performance

Abstract

The influence of refractory gravel amount and thermal resistance performance on a stone mastic asphalt-13 (SMA-13) road was studied through an indoor simulated light test. Thermal resistance friction course-13 (TRFC-13) was developed, and its antirutting performance was evaluated. The simulated illumination time should be 3 h when the surface temperature of an ordinary SMA rut board can reach 75°C, thereby corresponding to an extreme temperature of 41°C in summer. The replacement of single- and two-stage aggregates was explored. In comprehensive thermal resistance, road, and economic performances, 4.75–9.5 mm refractory gravel is recommended to replace the same particle size of 6% ordinary aggregate. The dynamic stability of TRFC-13 can be increased by 1.23, 1.56, 2.14, and 3.55 times at 38°C, 39°C, 4°C, and 41°C, respectively, compared with ordinary SMA-13. The low temperature and water stability satisfy the specification requirements.