Shrinkage Characteristics of Cement Treated Base Subjected to Thermal Coupled with Moisture in the Field

Abstract

Shrinkage of semi-rigid materials like cement treated base subjected to thermal coupled with moisture has raised crack in semi-rigid base, which causes reflective crack in the asphalt concrete top layer. The deformation characteristics of cement treated base subjected to thermal coupled with moisture is researched through the strain acquired by the vibrating wire string gauge installed in the cement treated base while construction. And it is found that transverse deformation is larger than longitudinal strain which may raise greater stress in longitudinal direction as the restriction is stronger.

Research on the Anti-Reflective Cracking Performance of a Full-Depth Asphalt Pavement

“…Most of the asphalt pavement of high-grade highways in China adopts a semi-rigid base structure with enough strength and rigidity, good integrity, strong diffusion stress ability and good water stability, which can ensure the stability of the base [1][2][3]. But a semi-rigid base is prone to shrinkage crack and low temperature shrinkage crack [4][5][6][7]. Under the repeated action of the traffic load and temperature load, the asphalt surface layer tends to expand and form reflection cracks [8][9][10][11], which seriously affects the road's performance and shortens its life.…”