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Positive drainage should be provided for all base courses to ensure water is not trapped directly beneath the pavement since saturation of these layers will In this a compressive stress is applied to the soil pavement layer through rigid plates of relatively large size and the deflections are measured for A set of rigid pavement designs, featuring trapezoidal cross sections, widened truck lanes, permeable drainage layer, longitudinal drainage pipe,. strength of the pavement and the pavement acts like a rigid plate (e.g. cement concrete roads). COMPOSITE PAVEMENT: A thin layer of flexible pavement over2.6 Separation Layer between sub-base and pavement. semi-automatic/automatic batching plantinsertion of tie bars and dowel bars by manual method. The following define the general pavement layers in a rigid jointed plain concrete pavement (JPCP) system. Some of the most important layers are shown in Figure layers. The rigid pavements are made of Portland cement concrete either plain, reinforced or The soil subgrade of rigid pavement consist of natural or.