Flexible pavement construction generally consists of 4 parts:
– Ground floor (sub grade)
– Lower pavement (sub base course)
– Pavement top (base course)
– Surface (surface course)
Ground Ground (Sub Grade)
The base soil is the original soil surface, excavated surface, or pile surface which is the basis for laying the rest of the pavement section.
The strength and durability of the pavement construction depend on the nature and carrying capacity of the ground. So this base ground determines the thickness of the soil layer above it.
To determine the strength of the basic soil is usually used the way CBR (CALIFORNIA BEARING RATIO). Commonly used classification systems on highways are UNIFIED and AASHO systems, while for airfields the FAA system is used.
Lower Pavement (Sub Base Course)
Sub base course or pavement down. Is the pavement that lies between the ground layer and the top pavement. Thus the sub base course is the foundation that supports the top pavement and surface layers.
The sub-base function is:
Upper Pavilion (Base Course)
The base course is the pavement section located between the surface layer and the sub base layer.
The material for the surface layer is generally the same as the material for the foundation layer, with higher requirements.
The use of asphalt material is necessary for the coating to be water-resistant, besides the asphalt itself provides tensile stress, which means enhancing the bearing capacity of the louboutin wheel.
Non-Woven Geotextile (Geotextile), otherwise called Fabric Filter (Factory) is an unlogged type of geotextile, shaped like a cloth carpet. Generally the base material is made of Polyesther (PET) or Polypropylene (PP) polymer material. To find out more information, you can see at http://www.maccaferri.com/my/products/geotextile-mactex/.
Geotextile Non Woven serves as:
- Filter / Filter
As a filter, Geotextile Non Woven serves to prevent the carrying of soil particles in the water flow. Because the nature of Geotextile Non Woven is permeable (water-permeable) then water can pass through Geotextile but the ground particle is retained. Application as a filter is usually used on subdrain projects (underground drainage).
- Separator / Separator
As a separator or separator, Geotextile Non Woven serves to prevent the mixing of one material layer with another material.
Examples of using Geotextile as a separator are on road construction projects on soft bottom soils (eg muddy). In this project, Geotextile prevents the mud from rising to the pavement system, so there is no pumping effect that will easily damage the pavement. In addition, the presence of Geotextile also facilitate the process of compacting the pavement system.
- Stabilization / Stabilizer
Geotextile function is often referred to as Reinforcement / Retrofitting. For example used on landfill projects, slope reinforcement etc. This function is actually still a debate among geotechnical experts, because Geotextile works using membrane effect method that only rely on tensile strength (tensile strength) so that the possibility of local decrease in the pile, still large, due to lack of material stiffness. Moreover, the geotextile properties are easy to reach especially when exposed to water (hydrolysis reaction occurs) makes it vulnerable as a reinforcement material slope.