Abstract
This study is focused on the effect of basalt fiber on the road performance of the asphalt mixture. The road performance of asphalt mixture with different dosages of basalt fiber was comprehensively evaluated using Marshall Stability test, the wheel tracking test, the three-point bending beam test and the freezing-thaw splitting test. The road performance of lignin fiber reinforced asphalt mixture and polyester fiber reinforced asphalt mixture also were tested to compare with the road performance of basalt fiber reinforced asphalt mixture. The results showed that basalt fiber can enhance mechanical properties, the low-and high-temperature performance and water sensitivity of the asphalt mixture significantly. Considering the road performance and economic benefits, the appropriate dosage of basalt fiber is about 0.3%. Marshall Stability (MS), dynamic stability (DS), the maximum bending strain and the tensile strength ratio (TSR) of asphalt mixture with 0.3% basalt fiber were increased by 19.6%, 25.5%, 22.2% and 6.0%, respectively. Basalt fiber has certain advantages in improving the low-temperature performance of asphalt mixture by comparison with lignin fiber and polyester fiber.
Highlights
With economic development, a large number of highways have been built in Jiangxi Province, China
The results show better performance with the optimum content of basalt fiber in the asphalt mixture
As the basalt fiber dosage increases, the value of optimum asphalt content (OAC) increases significantly.Basalt fiber hasa large specific surface area, which results in absorbing more asphalt
Summary
A large number of highways have been built in Jiangxi Province, China. Like less expensive and wear-resisting, asphalt mixture is one the most commonly used building materials in the pavement construction of Jiangxi Province. Because of the harsh climate and the increasing traffic volume, traditional asphalt mixtures are difficult to meet the durability requirement of asphalt pavement. Jiangxi Province is located in southern China and belongs to the humid subtropical climate zone. Permanent deformation of asphalt pavement, such as rutting, crowding, pushing and waves, are formed under heavy loads at high temperatures. Water damage, such as looseness, spalling, pits and pitted surfaces, are prone to appear
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