Asphalt pavement layer is part of the road structure that is still widely used in Indonesia. Asphalt pavement layers are more flexible compared to rigid pavement layers (concrete) to make road users feel more comfortable and secure. But not infrequently asphalt pavement layers on the road are often quickly damaged that cause road users are not comfortable. Damage to asphalt is often the quality factor of the material. In this article will discuss the impact of asphalt pavement damage on the road. Before discussing the causes of asphalt damage to roads exist. In an article that discusses some of the structures on the body that exists beneath the asphalt pavement layer. The cause of damage to asphalt pavement layers can also be caused by structural factors underneath. The cause of asphalt damage is often with the quality of asphalt material that is not in accordance with the terms and specifications. But there is some truth in it. No wonder if there are many right paths that are damaged right now. In this case, all parties must be responsible for the implementation of road works. Not only contractors, other stakeholder actors are also responsible, such as supervisory consultants, government from level to point. Therefore, the current implementation of the work must be submitted to the bona fide contractors through open tender. On the road, repair will present a plate testing that serves to consider the basis for the strength and depth of the road construction platform.
Job Mix Formula (JMF) is an ingredient composition of asphalt-aggregate made in the laboratory before the on-site implementation begins. JMF is used as a reference for asphalt aggregate work in the field. If the JMF mentions the bitumen content to be used in 6.2% then the bitumen content used in the field should be 6.2% as well. This JMF can not be substituted as required and must be acceded by the Supervising Consultant. To not be able to modify the bitumen content in the field unless JMF also changed. If the bitumen content in use is smaller than the asphalt at JMF it will be fatal on the quality of the asphalt-aggregate in the field. It contains the adhesive power and the transfer will be not maximal. Lag after paving finish the path will be a hair crack. If there is a hair crack then the rain air will go into the structure below. If allowed to continue air will damage the lower structure and aggravate the aggregate of asphalt. One of the causes of asphalt damage that often happens is that the asphalt-aggregate is cold when it comes to the field.
The reason is the distance of AMP (Asphalt mixing plant) with the pouring location too far. But the reason cannot be justified because the contractor complies with the specifications and. Then how the temperature of the asphalt pitch is correct? Asphalt temperature during slap. Normal asphalt temperature when poured in the asphalt finisher is 135-150 degrees Celsius. Prior to being dispersed it will be answered first using a thermometer. If the asphalt temperature becomes cold and less than the temperature indicated then the aggregate of the asphalt becomes hard agglomerate. Aggregates of asphalt aggregates will cause the asphalt aggregates to be hard to solidify so that the asphalt density becomes lessened.