Study on Mechanical Properties of Fiber-free SMA Mixture
Fiber-free SMA mixture is rarely used in China.Compared with the conventional SMA mixture,its mechanical properties and durability have been puzzling the engineering technicians.The gyratory compaction test,Hamburg wheel tracking test,indirect tensile cracking test and asphalt overlay cracking test are used to study the construction workability,high-temperature stability and normal-temperature cracking resistance of 2 SMA mixtures.The results show that the fiber-free SMA mixture has the good ability to resist the high-temperature deformation.Compared with the conventional SMA mixture,its construction temperature can be reduced by 20～30℃,and it is easier to be compacted.And its cracking resistance is also good.
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