Materials, Год журнала: 2025, Номер 18(11), С. 2598 - 2598

Опубликована: Июнь 2, 2025

Stone mastic asphalt (SMA) is the most widely adopted mixture on highway pavement in China. However, cost of SMA rising continually due to increasing shortage high-quality basalt aggregate. On other hand, China’s steel slag and reclaimed (RAP) stock abundant, has excellent strength wear-resistant performance, which can fully or partially replace part The content may be increased porosity slag. If fine RAP rich also used for SMA, it fill voids reduce amount new For this objective, 13 was designed with two particle sizes coarse aggregate (5–10 mm, 10–15 mm) one (0–5 mm), named SR-SMA. fundamental performance SR-SMA evaluated through a wheel-tracking test, low-temperature beam bending freeze–thaw indirect tensile four-point fatigue test. comparison, mix design tests SMAs involving (named SB-SMA), aggregates B-SMA), respectively, were conducted. results indicated that (dynamic stability 4865 passes/mm) shows best rutting resistance, followed by SB-SMA 4312 passes/mm), B-SMA 4135 comes last. Additionally, dynamic values three have significant differences. better cracking resistance failure strain 3150 με, between (failure are 4436, 2608 με). Compared SB-SMA, moisture relatively poor but meets Chinese specification. While worst among SMAs, their differences insignificant. Furthermore, reduces material approximately 35% per ton compared conventional B-SMA. Overall, cost-effective as an alternative traditional

Язык: Английский