Semi-rigid basic material has become the main form of basic level structure for highways,but the decrepitude of the freeze strength has been the important factor influencing the road quality.

• 半刚性基层材料以其优越的路用性能成为我国高速公路基层结构的主要形式,但路面的冰冻强度损失一直是影响其品质的重大问题。