THE WORKABILITY AND QUALITY OF ASPHALT FACING THICK LIFT METHOD

Abstract

  Asphalt facing method is one of the sealing work methods which are used for fill dam and reservoir. The multiple layer structure having intermediate drainage layer as impervious surface membrane is common for the dam with a height of over 30m in Japan. The multiple layer method which is composed of 2 to 3 layers of 5 to 6 cm each has been used for the upper impervious layers. However, in recent years, reservoirs are constructed in a severe cold weather presenting technical improvements such as shortening of construction period have become in a great demand as such the asphalt facing of the conventional work method of multiple layer structure and method which can not satisfy the above demands. In order to solve these technical improvements, the paving tests were carried out to examine the thick lift method, when was compared with the conventional work method, which will reduce the number of the impervious layers by increasing the thickness of each layer to 8-10cm, and the workability and quality level of the asphalt facing of the thick lift method and the conventional work method have been compared based on the various paving test results.