ABSTRACT

Laston AC-WC is the outer layer of the pavement that is directly related to the outside, so a strong mixture is required. One of the major effects is the aggregate gradation.This experiment aims to find out the comparison of Laston AC-WC performance between mixtures used aggregat egradation above and below the restriction zone. Each mixture used 6 variations of asphalt content and there were 3 specimens on each variation of bitumen content. The asphalt contents used were 5,5%; 6%; 6,5%; 7%; 7,5% dan 8%. From the results of the experiments, the mixture with the aggregate above the restriction zone at 7% and 7.5% asphalt content had a density value of 2.13 gr / cc and 2.12 gr / cc respectively; VMA value of 15.49% and 15.91%; VFA values ​​of 80.48% and 79.98%; VIM value of 3.16% and 3.18%; stability value of 3013.58 kg and 2332.57 kg; flow value of 2.47 mm and 2.18 mm; as well as MQ values ​​of 1222.25 kg / mm and 1184.59 kg / mm. While on the mixture with the aggregate under the restriction zone in the asphalt content of 7% and 7.5% obtained density value of 2.11 gr / cc and 2.14 gr / cc; VMA value of 17.21% and 16.3%; VFA value of 71.21% and 78.65%; VIM value of 4.99% and 3.49%; stability value of 2518,75 kg and 3234,72 kg; flow values ​​of 2 mm and 2.07 mm; as well as the MQ value of 1259.37 kg / mm and 1623.54 kg / mm. From the results are analyzed Paired T test and found that the value of flow has a significant difference. The high flow rate was found in the mixture with the aggregate above the restriction zone at 7% asphalt content, so this mixture is more durable due to good flexibility.