Often we find roads on the highway to be damaged, as one of the quality standards of this asphalt pavement layer strength is the Marshall or Marshall Stability charge that is used with Marshall Stability. The British Standard has a standard load of 680 kg and 1500 lbs for AASHTO but the standards in each country are very different, but the preferred temperature is 60 degrees Celsius. With a reasonable load, the wheels of the truck are pumped according to the required wind pressure of 80 psi or 5.6 kg and a maximum of 100 psi. However, with excessive charge, it is no longer possible that the wheel wind pressure is only 80 psi because the rear wheel of the truck consisting of 2 rubber tires will bulge and rub against each other. Almost all truck wheels are pumped with wind pressure above 120 psi and some heavy truck wheels are even pumped to 150 psi or nearly 2 times the required wind pressure. It typically uses an equivalent 16 ply rate tire that is not manufactured by local factories. In addition to this friction that occurs on the road also makes the street surface is no longer intact, you can just use cbr testing.
What is cbr testing? CBR Testing is a modification made to the ground with activities related to construction. Usually used when you are the usual road hardening construction coated with asphalt. In this case, cbr testing plays a role in the test conducted in the state of the water saturation level reaches 80% or more and if the material is rough and less cohesion so as not to be affected by changes in water content. If no modifications are made to the ground with activities in construction and water activities are not necessarily constant. Thereby reducing in a narrow range. Therefore, field test data is needed with information that can be used to demonstrate a good capacity on the road. Many roads on the highway are flooded during the rainy season and this is the result of poor drainage system around the road. Stagnant water above the surface of the asphalt road becomes one of the main causes of road construction damage or road hardening due to asphalt pavement will not be strong enough to survive when often flooded.