Pavement is a mixture of aggregates and bonding materials used to serve the traffic load. Aggregates commonly used in road pavement are crushed stone, stone, stone and steel by-product. While the materials used include cement, asphalt, and clay. In general, the pavement consists of several types of pavement layers composed from the bottom up, as follows Subsoil layer, The base soil layer is a soil layer that serves as a place of pavement placement and supports the construction of pavement on it. According to Specification, the bottom soil is the top layer of a 30 cm thick road pile, which has certain requirements according to its function, ie with respect to its density and carrying capacity (CBR) ie cbr testing. The base soil layer may be a compacted original soil if the original soil is good, or the soil is imported from another place or stabilized soil and another. Viewed from the face of the original soil, the basal layer is distinguished over the base layer of soil, excavated soil. The base soil layer, the soil urugan. The basic soil layer, the original soil. The strength and durability of road pavement construction is highly dependent on nature and carrying capacity of the ground. Generally, the issue concerning the land base is as follows the change of fixed form (permanent deformation) due to traffic load. The nature of expanding and shrinking of soil due to changes in water content. Uneven soil carrying capacity due to differences in soil properties at adjacent sites or due to mismanagement eg poor density.
Subbase course, base course, Surface course. There are several types/types of pavement that is Flexible pavement is a pavement layer function to receive the traffic load and spread it to the underlying layer to the bottom ground. Rigid pavement (Compact pavement), Composite pavement (combined rigid and flexible pavement). The base layer is a pavement layer that lies above the bottom layer of the soil and beneath the upper base layer. The base layer serves as a Part of the pavement construction to spread the wheel load to the bottom ground. Immersion layer, so that groundwater does not gather in the foundation. The coating to prevent the fine particles from the base soil rises to the upper base layer. The base layer protective layer of the heavy equipment wheel load (due to the weak carrying capacity of the ground soil) in the early execution of the work. The protective layer of the base layer from the influence of the weather especially rain.
The top foundation layer is a pavement layer that lies between the bottom layer and the surface layer. The top layer of the foundation serves as a pavement section which holds the latitude of the wheel load and spreads the load to the underlying layer. Bearing of surface coating. The materials for this base layer must be strong enough and durable to withstand wheel loads. In the determination of this foundation, material need to consider several things, among others, the adequacy of local materials, price, the volume of work and distance of transport materials to the field.