What is semi rigid pavement in highway engineering

 ➤ Semi Rigid Pavement: These pavements are constructed with the materials like the pozzolana  concrete, the lime-fly ash-aggregate mix, or lean cement concrete and thus have sufficient flexure strength. They possess the flexural strength in between those of the rigid pavement and that of the flexible pavements. They are designed as the flexible pavements but with some correction factors applied to it, or they are designed by some other methods. These materials don't have the good resistant against the impact and the abrasion loads so the surface course is constructed with the flexible pavement materials.