Utilizing high density polyethylene synthetic aggregate as a chipping material in improving skid resistance characteristic of HRS-WC

FATAHILLAH, Arjunaa, Dr. Ir. Latif Budi Suparma, M.Sc

2009 | Tesis | S2 Magister Sistem dan Teknik Transportasi

The implementation of road safety improvements is to reduce the number of crashes and fatalities on roadway. In this sense, more attention is required to other elements of the roadway system that could be a contributing factor in traffic crashes. One such contributing factor is road surface characteristics, specifically skid resistance (friction) of roadway pavements under various weather conditions. The purpose of this research is to analyze skid resistance performance of Hot Rolled Sheet-Wearing Course (HRS-WC) asphalt mixture that had improved with surface dressing chipping method using High Density Polyethylene (HDPE) as a chipping by British Pendulum Tester (BPT) and compare it with Hot Rolled Sheet-Wearing Course (HRS-WC) asphalt mixture without chipping method. There are three specimens of aggregate spread rate variations for each asphalt mixture with 40 cm*40 cm*3 cm size, are: 238 gr, 338 gr, 438 gr. Maximum aggregate spread that has highest skid resistant value will be compared to skid resistant value of asphalt mixture without using chipping. Skid resistant value from test can be applied in improving traffic safety from road environment perspective such as: relationship between skid resistance and accident ratio, stopping distance, and speed in the darkness. The results from this research are: aggregate spread rate variant 238 gr was a maximum spread rate with the highest skid resistant value (82.2). HDPE as chipping on HRS-WC asphalt mixture can improve skid resistant value. From comparison with HRS-WC asphalt mixture without chipping (with skid resistance value 51) in this research, HDPE as chipping can improve skid resistance until 62 %. HDPE as chipping on HRS-WC asphalt mixture can lower the accident ratio 300 % according to Virginia State data. HDPE as a chipping on HRS-WC asphalt mixture can increase friction coefficient 52.5 % from 0.40 become 0.61. In this research pavement with chipping using HDPE has a shorter stopping distance then pavement without chipping. HDPE can improve the safety condition by increasing speed limit or in the same speed the stopping distance will be reduce.

Kata Kunci : HRS,WC asphalt mixture,Chipping method,Road safety,Synthetic aggregate