Error in Guidelines for Determining Thickness of Pavement Lining
Stagnant water can cause damage to the sub-grade soil under the pavement layer which, when combined with heavy truckload volume involving overloading, is a fatal combination for asphalt pavement. The problem of the drainage system is often overlooked by road planners, whereas road drainage systems are not only limited to improved roads but include the interconnection of road drainage channels with larger drainage systems. The paradigm of pursuing effective targets by forgetting the functional targets of drainage should be changed. Roads, both main road, and residential roads are generally divided into three types, namely concrete road, asphalt road and paving block. The three road construction has different characteristics, so in the application is different. Some are applied specifically to the main road, some are applied to residents walkways. Each road has advantages and disadvantages, this can be your consideration when buying a home. Not to miss for the roads traversed by fully loaded cars that cbr testing comes to balance the road pressure.
The pressure weighed through cbr testing is divided by the pressure required to obtain the same penetration of a standard crushed rock material. If the road surface is hard, then the testing value tends to be high and usually covers 2% equal to clay. Sand may have 10% cbr testing and a high-volume sub-base may have a maximum of 80-100%. Construction on a common concrete road is called a rigid pavement. Where the composition consists of a concrete slab plate as the base layer and the bottom layer on the bottom ground. Concrete plates are usually referred to as layers of foundation because it is possible that there is still a layer of concrete asphalt at its surface that serves as a surface layer.
This concrete road construction is quite strong because it has a high elastic modulus. In civil engineering, the modulus of elasticity is the number used to measure the object or resistance of the material to experience the deformation of the station when force is applied to the object. That is why concrete road construction is often applied to highways and environmental roads. The thickness of this concrete road is at least 20cm. Excess concrete roads include Resistant to puddles and floods. Maintenance costs are cheaper than asphalt roads. Recommended for roads that have poor base ground, and roads with heavy vehicle traffic are quite high.