为了减少水泥稳定碎石基层的干缩裂缝,探索了利用膨胀剂来抑制干缩的可能性。试验结果表明,膨胀剂可有效地降低水泥稳定碎石的干缩变形,并有助于提高水泥稳定碎石的抗拉强度。试验路的观测结果也表明,膨胀剂的加入可减少水泥稳定碎石基层的初期开裂。 In order to reduce the dry shrinkage cracks of the cement stabilized macadam base, the possibility of using the expansive agent to restrain the shrinkage is explored. The experimental results show that the expansive agent can effectively reduce the dry shrinkage deformation of cement stabilized macadam and help to increase the tensile strength of cement stabilized macadam. The test results also show that the addition of expansive agent can reduce the initial cracking of cement-stabilized gravel base.