Pavement Layer Works

The pavement layer works to receive the traffic load and spread it to the underlying layer continuously to the bottom ground. While the base layer of soil is a layer of soil that serves as a place of placement of pavement layer and supports pavement construction on it. According to Specification, the bottom soil is the topmost layer of 30 cm thick road pile, which has certain requirements according to its function, ie with respect to its density and carrying capacity (CBR).
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 divided into:
Basic soil layers, minerals.
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 the nature and carrying capacity of the ground. Generally issues concerning basic land are as follows:
Fixed form changes (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.

1. Bottom Base Layer (Subbase Course)
   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:
   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) at the beginning of the work execution.
   The protective layer of the base layer from the influence of the weather especially rain.
2. The base layer (base course)
   The upper layer of the foundation is a pavement layer located between the bottom layer and the surface layer. The upper layer of this foundation serves as:
   The pavement section retains 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, volume of work and the distance of transport materials to the field.

1. Surface Course (Surface Course)
   The surface layer is a layer in direct contact with the vehicle wheel load. This surface layer serves as:
   Layers that are directly restrained due to vehicle wheel loads.
   Layers that directly withstand friction due to vehicle brakes (wear layer).
   Layers that prevent rain falling over it do not seep into the undercoat and weaken the layer.
   The layer that spreads the load to the lower layer, so it can be borne by the layer below it.